Rohde & Schwarz HMO1202 Series User manual

Test & Measurement
User Manual
Version 04
R&S®HMO1002 Series
R&S®HMO1202 Series
Digital Oscilloscope
User Manual
5800530103

2
General Information Regarding the CE Marking
General Infor-
mation
Regarding
the CE Mar-
General Information Regarding the CE Marking
ROHDE & SCHWARZ measuring instruments comply with regulations of the
EMC Directive. ROHDE & SCHWARZ is basing the conformity assessment
on prevailing generic and product standards. In cases with potentially
different thresholds, ROHDE & SCHWARZ instruments apply more rigorous
test conditions. Thresholds for business and commercial sectors as well
as small business are applicable for interference emission (class 1B). As to
the interference immunity, the standard thresholds for the industrial sector
apply. Measurement and data lines connected to the measuring instrument
signicantly affect compliance with specied thresholds. Depending on the
respective application, utilized lines may differ. In regards to interference
emission and immunity during measurements, it is critical that the following
terms and conditions are observed:
1. Data Cables
It is imperative to only use properly shielded cables when connecting
measuring instruments and interfaces to external devices (printers, compu-
ters, etc.). Unless the manual prescribes an even shorter maximum cable
length, data cables (input/output, signal/control) may not exceed a length
of 3m and may not be used outside of buildings. If the instrument interface
includes multiple ports for interface cables, only one cable at a time may be
connected. Generally, interconnections require double-shielded connecting
cables. The double-shielded cable HZ72 (available at ROHDE & SCHWARZ) is
well suitable as IEEE bus cable.
2. Signal Cables
In general, measuring cables for the transmission of signals between measu-
ring point and measuring instrument should be kept as short as possible.
Unless an even shorter maximum cable length is prescribed, signal cables
(input/output, signal/control) may not exceed a length of 1m and may not be
used outside of buildings. All signal cables must be shielded (coaxial cable
RG58/U). It is important to ensure proper ground connection. Signal genera-
tors require the use of double-shielded coaxial cables (RG223/U, RG214/U).
3. Impact on Measuring Instruments
If strong high-frequency electric and magnetic elds are present, it may
occur despite diligent measurement setup that unwanted signal units are
injected into the measuring instrument via connected measuring cables. This
will not damage the ROHDE & SCHWARZ measuring instrument or put it out
of operation. In some cases, these circumstances may cause the measuring
value to slightly exceed specications.
4. RF immunity of oscilloscopes.
4.1 Electromagnetic RF eld
The inuence of electric and magnetic RF elds may become visible (e.g. RF
superimposed), if the eld intensity is high. In most cases the coupling into
the oscilloscope takes place via the device under test, mains/line supply,
test leads, control cables and/or radiation. The device under test as well as
the oscilloscope may be effected by such elds. Although the interior of the
oscilloscope is screened by the cabinet, direct radiation can occur via the
CRT gap. As the bandwidth of each amplier stage is higher than the total
–3 dB bandwidth of the oscilloscope, the inuence of RF elds of even higher
frequencies may be noticeable.
4.2 Electrical fast transients / electrostatic discharge
Electrical fast transient signals (burst) may be coupled into the oscilloscope
directly via the mains/line supply, or indirectly via test leads and/or control
cables. Due to the high trigger and input sensitivity of the oscilloscopes,
such normally high signals may effect the trigger unit and/or may become
visible on the TFT, which is unavoidable. These effects can also be caused by
direct or indirect electrostatic discharge.

3
Content
Content
1 Important Notes ..........................4
1.1 Symbols .................................... 4
1.2 Unpacking ................................... 4
1.3 Setting up the instrument ....................... 4
1.4 Safety ....................................... 4
1.5 Intended Operation ............................ 4
1.6 Ambient conditions ............................ 5
1.7 Warranty and repair ............................ 5
1.8 Maintenance.................................. 5
1.9 Measuring Category ........................... 5
1.10 Mains voltage................................. 6
1.11 Batteries and rechargeable batteries / cells ......... 6
1.12 Product Disposal .............................. 6
2 Introduction ..............................8
2.1 Front view.................................... 8
2.2 Control panel ................................. 8
2.3 Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 General Operating Concept ...................... 9
2.5 Basic Settings and Integrated Help ............... 10
2.6 Instrument Firmware Update.................... 10
2.7 Options / Voucher ............................ 10
2.8 Self Alignment ............................... 11
2.9 Education Mode.............................. 12
2.10 Back Panel of the Instrument ................... 12
3 Quick Start Guide ........................13
3.1 Setting up and turning the instrument on.......... 13
3.2 Connection of a probe and signal capture ......... 13
3.3 Display of signal details ........................ 13
3.4 Cursor Measurements ......................... 14
3.5 Automatic Measurements ...................... 14
3.6 Mathematical functions ........................ 15
3.7 Storing data ................................. 15
4 Vertical System ..........................16
4.1 Coupling .................................... 16
4.2 Sensitivity, Y Positioning and Offset .............. 16
4.3 Bandwidth Limit and Signal Inversion............. 16
4.4 Probe Attenuation and Unit Selection
(Volt/Ampere) ................................ 16
4.5 Threshold Setting............................. 17
4.6 Naming a Channel ............................ 17
5 Horizontal System ........................18
5.1 Acquisition modes RUN and STOP ............... 18
5.2 Time Base Settings ........................... 18
5.3 Acquisition modes ............................ 18
5.4 Interlace Mode ............................... 21
5.5 ZOOM Function .............................. 21
5.6 Navigation Function........................... 21
5.7 Marker Function.............................. 21
6 Trigger System...........................22
6.1 Trigger Modes Auto, Normal and Single........... 22
6.2 Trigger Source ............................... 22
6.3 Trigger type ................................. 22
6.4 Trigger Events................................ 25
6.5 External Trigger .............................. 25
7 Signal Display ...........................26
7.1 Display Settings .............................. 26
7.2 Usage of the Virtual Screen..................... 26
7.3 Signal Intensity Display and Persistence Function ... 26
7.4 XY display................................... 27
8 Measurements ...........................28
8.1 Cursor Measurements ......................... 28
8.2 Automatic Measurements ...................... 29
9 Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
9.1 Mathematical Functions ....................... 32
9.2 Frequency Analysis (FFT)....................... 34
9.3 Quick View .................................. 35
9.4 PASS/FAIL Test based on Masks................. 36
9.5 Component Test.............................. 37
9.6 Digital Voltmeter ............................. 38
10 Signal Generation ........................39
10.1 Function Generator ........................... 39
10.2 Pattern Generator............................. 39
11 Documentation, Storage and Recall ..........41
11.1 Device Settings .............................. 41
11.2 References .................................. 41
11.3 Tr a c e s ...................................... 42
11.4 Screenshots .................................43
12 Mixed-Signal Operation ....................44
12.1 Logic Trigger for Digital Input ...................44
12.2 Display Functions for the Logic Channels .......... 44
11.5 FILE/PRINTKeyDenition ...................... 44
12.3 Display of Logic Channels as BUS................ 45
12.4 Cursor Measurements for Logic Channels .........45
12.5 Automatic Measurements for Logic Channels ...... 46
13 Serial Bus Analysis .......................46
13.1 Software options (license key)................... 46
13.2 SerialBusConguration ....................... 46
13.3 Parallel / Parallel Clocked BUS................... 48
13.4 I2C BUS..................................... 48
13.5 SPI / SSPI BUS ............................... 50
13.6 UART/RS-232 BUS .......................... 52
13.7 CAN BUS ................................... 53
13.8 LIN BUS ................................... 55
14 Remote Control ..........................57
14.1 USB VCP.................................... 57
14.2 USB TMC ................................... 57
14.3 USB MTP ................................... 59
14.4 Ethernet .................................... 60
15 Technical Data ...........................63
16 Appendix ...............................67
16.1 Listofgures ................................ 67
16.2 Glossary .................................... 67

4
Important Notes
1 Important
Notes
1.1 Symbols
(1) (2) (3)
(4) (5) (6) (7)
Symbol 1: Caution, general danger zone –
Refer to product documentation
Symbol 2: Risk of electric shock
Symbol 3: Ground
Symbol 4: PE terminal
Symbol 5: ON/OFF supply voltage
Symbol 6: Stand by display
Symbol 7: Ground terminal
1.2Unpacking
While unpacking, check the package contents for com-
pleteness (measuring instrument, power cable, possibly
optional accessories). After unpacking, check the
instrument for mechanical damage occurred during
transport and for loose parts inside. In case of transport
damage, please inform the supplier immediately. The inst-
rument must not be operated in this case.
1.3 Setting up the instrument
As you can see from the picture, there are small feets on
the bottom which can be folded out. Please make sure you
have fully folded out the feet‘s in order to ensure stability
of the instrument.
Fig. 1.1: Operating positions
The instrument must be installed in a way, that at any time
the disconnection of the power line is not restricted.
1.4 Safety
This instrument was built in compliance with DIN EN
61010-1 (VDE 0411 part 1), safety regulations for electrical
measuring instruments, control units and Iaboratory equip-
ment. It has been tested and shipped from the plant in safe
condition. It is in compliance with the regulations of the
European standard EN 61010-1 and the international stan-
dard IEC 61010-1. To maintain this condition and to ensure
safe operation, the user must observe all instructions and
warnings given in this operating manual. Casing, chassis
and all measuring ports are connected to a protective Fig.
1.1: Operating positions earth conductor. The instrument is
designed in compliance with the regulations of protection
class I. For safety reasons, the instrument may only be
operated with authorized safety sockets. The power cord
must be plugged in before signal circuits may be connec-
ted. Never use the product if the power cable is damaged.
Check regularly if the power cables are in perfect condi-
tion. Choose suitable protective measures and installation
types to ensure that the power cord cannot be damaged
and that no harm is caused by tripping hazards or from
electric shock, for instance.
If it is assumed that a safe operation is no longer possible,
the instrument must be shut down and secured against
any unintended operation.
Safe operation can no longer be assumed:
❙in case of visible damage,
❙in case loose parts were noticed,
❙if it does not function any more,
❙after prolonged storage under unfavourable conditions
(e.g. like in the open or in moist atmosphere),
❙After rough handling during transport (e.g. packaging that
doesnotmeettheminimumrequirementsbypostofce,
railway or forwarding agency).
1.5 Intended Operation
The measuring instrument is intended only for use by per-
sonnel familiar with the potential risks of measuring electri-
cal quantities. For safety reasons, the instrument may only
be connected to properly installed safety socket outlets.
Separating the grounds is prohibited. The power plug must
be inserted before signal circuits may be connected. The
product may be operated only under the operating condi-
It is prohibited to disconnect the earthed protective
connection inside or outside the instrument!
Use the measurement instrument only with original ROHDE &
SCHWARZ measuring equipment, measuring cables and power
cord. Never use inadequately measured power cords. Before each
measurement, measuring cables must be inspected for damage
and replaced if necessary. Damaged or worn components can
damage the instrument or cause injury..

5
Important Notes
tionsandinthepositionsspeciedbythemanufacturer,
without the product‘s ventilation being obstructed. If the
manufacturer‘sspecicationsarenotobserved,thiscan
resultinelectricshock,reand/orseriouspersonalinjury,
and in some cases, death. Applicable local or national
safety regulations and rules for the prevention of accidents
must be observed in all work performed.
The measuring instrument is designed for use in the
following sectors: industrial sector, home, business and
commercial sectors, small businesses. The measuring
instrument is designed for indoor use only. Before each
measurement, you need to verify at a known source if the
measurement instrument functions properly.
1.6 Ambient conditions
The allowed operating temperature ranges from +5 °C to
+40 °C (pollution category 2). The maximum relative hu-
midity (without condensation) is at 80%. During storage
and transport, the temperature must be between –20 °C
and +70 °C. In case of condensation during transportation
or storage, the instrument will require approximately two
hours to dry and reach the appropriate temperature prior
to operation. The instrument is designed for use in a clean
and dry indoor environment. Do not operate with high dust
and humidity levels, if danger of explosion exists or with
aggressive chemical agents. Any operating position may
be used; however, adequate air circulation must be main-
tained. For continuous operation, a horizontal or inclined
position (integrated stand) is preferable. The maximum
operatingaltitudefortheinstrumentis2000m.Specica-
tions with tolerance data apply after a warm up period of at
least 30 minutes at a temperature of 23 °C (tolerance ±2°C).
Specicationswithouttolerancedataareaveragevalues.
1.7 Warranty and repair
ROHDE&SCHWARZinstrumentsaresubjecttostrict
quality controls. Prior to leaving the manufacturing site,
each instrument undergoes a 10-hour burn-in test. This is
followed by extensive functional quality testing to examine
all operating modes and to guarantee compliance with
thespeciedtechnicaldata.Thetestingisperformedwith
testing equipment that is calibrated to national standards.
The statutory warranty provisions shall be governed by
the laws of the country in which the ROHDE & SCHWARZ
To disconnect from the mains, the low-heat device socket on the
back panel has to be unplugged.
Do not obstruct the ventilation holes.
product was purchased. In case of any complaints, please
contact your supplier.
Anyadjustments,replacementsofparts,maintenanceor
repair may be carried out only by authorized ROHDE &
SCHWARZ technical personnel. Only original parts may be
used for replacing parts relevant to safety (e.g. power swit-
ches, power transformers, fuses). A safety test must al-
ways be performed after parts relevant to safety have been
replaced (visual inspection, PE conductor test, insulation
resistance measurement, leakage current measurement,
functional test). This helps to ensure the continued safety
of the product.
1.8 Maintenance
The display may only be cleaned with water or appropriate
glass cleaner (not with alcohol or other cleaning agents).
Follow this step by rubbing the display down with a dry,
cleanandlint-freecloth.Donotallowcleaninguidto
enter the instrument. The use of other cleaning agents
may damage the labeling or plastic and laquered sur-
faces.
1.9 Measuring Category
This oscilloscope is designed for measurements on circuits
that are only indirectly connected to the mains or not
connected at all. The instrument is not rated for any mea-
surement category. Make sure the entry voltage of the
analog channels CH1/CH2 does not exceed 200V (peak
value),150VRMSat1MΩinputimpedance.Theentryvol-
tage of the external trigger input (TRIG. EXT.) does not
exceeded 100 V (peak value).The maximum value allowed
for transient overvoltages is 200 V (peak value). To ensure
compliance, it is necessary to only use probes that have
been manufactured and tested in accordance with DIN EN
61010-031in order to prevent transient overvoltages at the
measurement input. The auxilary output (AUX OUT) is a
multi-purpose output with the function as component tes-
ter, trigger output, pass/fail and function generator. When
performing measurements in category II, III or IV circuits, it
is mandatory to insert a probe that reduces the voltage so
that no transient overvoltages will be applied to the instru-
ment. Direct measurements (without galvanic isolation) to
category II, III or IV circuits are prohibited. The measuring
Clean the outer case of the instrument at regular intervals, using
a soft, lint-free dust cloth. Before cleaning the instrument, please
make sure that it has been switched off and disconnected from
all power supplies. (e.g. mains or battery supply).
Before cleaning the measuring instrument, please make sure that
it has been switched off and disconnected from all power sup-
plies (e.g. AC supply network or battery).
No parts of the instruments may be cleaned with chemical clean-
ing agents (such as alcohol, acetone or cellulose thinner)!
The product may only be opened by authorized and
qualied personnel. Before any work is performed on the
product or before the product is opened, it must be dis-
connected from the AC supply network. Otherwise, per-
sonnel will be exposed to the risk of an electric shock.

6
Important Notes
circuits are considered not connected to the mains if an
isolation transformer in compliance with class II is used.
It is also possible to perform measurements on the mains
if appropriate transformers (e.g. current connectors) are
used that are in compliance with safety class II. The mea-
surementcategory(forwhichthemanufacturerspecied
the required transformer) must be observed.
The measurement categories refer to transients from
the power system. Transients are short, very fast (steep)
current and voltage variations which may occur periodi-
cally and nonperiodically. The level of potential transients
increases as the distance to the source of the low voltage
installation decreases.
❙Measurement CAT IV: Measurements at the source of
the low voltage installations (e.g. meters)
❙Measurement CAT III: Measurements in building
installations (e.g. power distribution installations, power
switches,rmlyinstalledsockets,rmlyinstalledengines
etc.).
❙Measurement CAT II: Measurements on circuits
electronically directly connected to the mains (e.g.
household appliances, power tools, etc.)
❙0(instruments without measured measurement
category): Other circuits that are not connected directly to
the mains.
1.10 Mains voltage
The instrument has a wide range power supply from 100
to 240 V (±10%), 50 or 60 Hz. There is hence no line vol-
tage selector. The line fuse is accessible on the rear panel
and part of the line input connector. Prior to exchanging
a fuse, the line cord must be pulled out. Exchange is only
allowed if the fuse holder is undamaged. It can be taken
out using a screwdriver put into the slot. The fuse can be
pushed out of its holder and must be exchanged with the
identical type (type informations below). The holder with
the new fuse can then be pushed back in place against the
spring. It is prohibited to ”repair“ blown fuses or to bridge
the fuse. Any damages incurred by such measures will
void the warranty.
Type of fuse:
IEC 60127 - T2.5H 250V (Size 5 x 20 mm)
1.11 Batteries and rechargeable batteries / cells
If the information regarding batteries and rechargeable batteries/
cells is not observed either at all or to the extent necessary,
product users may be exposed to the risk of explosions, re and/
or serious personal injury, and, in some cases, death. Batteries
and rechargeable batteries with alkaline electrolytes (e.g. li-
thium cells) must be handled in accordance with the EN 62133
standard.
1. Cells must not be taken apart or crushed.
2. Cellsorbatteriesmustnotbeexposedtoheatorre.
Storage in direct sunlight must be avoided. Keep cells
and batteries clean and dry. Clean soiled connectors
using a dry, clean cloth.
3. Cells or batteries must not be short-circuited. Cells or
batteries must not be stored in a box or in a drawer
where they can short-circuit each other, or where they
can be short-circuited by other conductive materials.
Cells and batteries must not be removed from their ori-
ginal packaging until they are ready to be used.
4. Keep cells and batteries out of the hands of children. If
a cell or a battery has been swallowed, seek medical
aid immediately.
5. Cells and batteries must not be exposed to any mecha-
nical shocks that are stronger than permitted.
6. Ifacelldevelopsaleak,theuidmustnotbeallowed
to come into contact with the skin or eyes. If contact
occurs, wash the affected area with plenty of water
and seek medical aid.
7. Improperly replacing or charging cells or batteries can
cause explosions. Replace cells or batteries only with
the identical type in order to ensure the safety of the
product.
8. Cells and batteries must be recycled and kept separate
from residual waste. Rechargeable batteries and nor-
mal batteries that contain lead, mercury or cadmium
are hazardous waste. Observe the national regulations
regarding waste disposal and recycling.
1.12 Product Disposal
Fig. 1.2:
Product labeling in accordance with EN 50419
The German Electrical and Electronic Equipment (ElektroG)
Act is an implementation of the following EC directives:
❙2002/96/EC on waste electrical and electronic equipment
(WEEE) and
❙2002/95/EC on the restriction of the use of certain
hazardous substances in electrical and electronic
equipment (RoHS).
Once its lifetime has ended, this product should be dis-
posed of separately from your household waste. The dis-
posal at municipal collection sites for electronic equipment
is also not permitted. As mandated for all manufacturers

7
Important Notes
by the German Electrical and Electronic Equipment Act
(ElektroG), ROHDE & SCHWARZ assumes full responsibil-
ity for the ecological disposal or the recycling at the end-
of-life of their products.
Please contact your local service partner to dispose of the
product.

8
Introduction
2 Introduction
2.1 Front view
Ontheinstrumentfrontsideyoucanndthepowerkey
1
, in order to switch on the instrument or enter stand-by-
mode. If the instrument is in stand-by-mode, this key light
up red. If the instrument is switched off using the main
power switch on the backside, the red light will also switch
off(thiswilltakesomeseconds).Furthermoreyoundon
the front panel the control panel
2
,
A
,
B
,
C
,
D
, the BNC
connectors of the analog inputs
45
to
46
,theprobeadjust-
ment output
49
, the bus signal source
48
,the connectors
for the optional logic probe R&SHO3508
50
, a USB port for
USB sticks
52
and the TFT screen
53
. For component and
Pass/Fail test use the BNC connector AUX OUT
51
.
2.2 Control panel
The controls in the front panel allow access to all basic
functions while advanced settings are easily accessible
through the menu structure and gray soft menu keys.
The power button
1
is clearly set apart by its design. The
mostsignicantcontrolsfeaturecoloredLEDs,indicating
the current setting. The control panel is divided into four
sections.
Use the connectors for the active logic probes
50
exclusively for
the logic probes of type R&SHO3508. Connecting other types may
demolish the input.
Section
A
This section includes the CURSOR/MENU, ANALYZE and
GENERAL sections. The CURSOR/MENU section includes
cursor functions
8
, universal knob
4
, Intens/Persist con-
trol switch
7
and the option to select the virtual screen
6
. The ANALY ZE section allows users to directly access
the FFT displays
9
, the QUICK VIEW
10
display (all im-
portant parameters of the actual signal display), the PASS/
FAIL mask test and the AUTO MEASURE settings
11
. The
portion Analyze allows direct selection of FFT
9
displays,
the Quick view mode
10
(all important parameters of the
actual signal display), and the automeasure function
11
for
the automatic measurement of parameters. The GENERAL
section includes the Save/Recall
12
key. With this option,
you can control the settings to load and save instrument
settings, reference signals, signals and screen displays.
Additional keys enable the user to access general settings
13
such as language, DISPLAY
14
, AUTOSET
15
as well as
integrated HELP
16
and FILE/PRINT
17
. Depending on how
it is programmed, FILE/PRINT enables you to directly save
instrument settings, signals or screen displays.
Fig. 2.1: Frontview of the R&S®HMO1202
1
47 46 45505152
2
55 A
B C D
49 48
3
A
5
15 16
8 11 14
9 10
67
12 13
4
17
Fig. 2.2:
Control
panel of
section A

9
Introduction
Section
B
:
The VERTICAL section fea-
tures all controls for analog
channels, such as the position
control knob
18
, the XY and
component test mode (UTIL
menu)
19
, the vertical gain ad-
justmentknob
20
, the advan-
ced menu options key
21
, the
channel select keys
22
to
23
and selection key for the opti-
onal logic probe R&SHO3508
24
. You can also access the
MATH key, reference and BUS
signal settings key here
27
.
Section
C
:
The TRIGGER section includes
all options to set the trigger
level
28
, to switch between
Auto and Normal mode
29
,
to set the trigger type
31
, the
source
32
, the single trigger
33
, to switch the trigger slope
35
and to set the trigger signal
lters
36
. Additionally, you
canndstatusindicators,and
youcanseeifasignalfullls
the trigger conditions
30
and
which slope is used
34
.
Section
D
:
In the HORIZONTAL section,
users can shift the trigger po-
sition horizontally or set and
navigate markers manually,
either step-by-step with the
keys
37 38 39
or alternatively
by using the smaller one of
the knobs
41
. In the menu,
you can also set search crite-
ria for events. The illuminated
key
39
allows the selection
of the Run and Stop mode.
When the stop mode is se-
lected, the key will light up
in red.
40
activates the zoom
option,
44
selects the acquisition modes,
43
adjuststhe
time base speed and
42
enables access to the time base
menus.Totheleftofthecontrolpanel,youalsondthe
soft menu keys
2
to control the menu options.
2.3 Screen
The R&S®HMO1002 resp. R&S®HMO1202 series is equip-
ped with a 6.5” (16.51 cm) TFT color monitor with LED
backlight and VGA resolution (640x480 pixels). In the
default setting (no menus shown), the screen includes
12 scale divisions on the time axis. If menus are shown,
this will be reduced to 10 divisions. Small arrows on the
left of the display indicate the reference potentials of the
channels. The line above the graticule includes status and
settings information such as time base, trigger delay and
other trigger conditions, the current sampling rate and
the acquisition mode. The short menu to the right of the
graticule contains the most important settings of the cur-
rently active channel. You may select these settings using
the soft menu keys. Measurement results for automated
measurements and cursors, settings for the activated
vertical channels, reference signals and mathematically de-
rived curves are shown in the lower section of the screen.
Within the graticule, signals of the selected channels are
displayed. By default, 8 scale divisions are shown. This
can be extended virtually to 20 divisions which can be dis-
played using the Scroll/Bar
5
key.
2.4 General Operating Concept
The general operating concept is based on a few key prin-
cipals, recurring with various settings and functions:
❙Keys that do not open a soft menu (e.g. SCROLL BAR)
activateaspecicfunction;pressingthiskeyasecond
time will deactivate this function.
❙Keys that open a soft menu when pressed once will close
the soft menu when pressed a second time.
❙Depending on the requirements, the universal knob in the
CURSOR/MENU section is designed to either select a
numeric value or to navigate through submenus.
❙The MENU OFF key below the soft menu keys closes the
current menu or switches to the next higher level.
❙Pressing the appropriate key will activate a deactivated
channel. If a channel was already activated, selecting
another channel will change operation to the channel
whose key was pressed (its LED lights up).
❙If cursor measurements are activated, the COARSE/FINE
key will select the cursor with the activated universal
knob in the CURSOR/MENU section. This key is used to
selectorconrminputinallmenusforalphanumerical
inputandforthelemanager.
The soft menus include some frequently used navigation
elements as described below. You can select the respec-
tive element by pressing the corresponding soft menu
key, and the element will be marked in blue. Alternatively,
you can press the soft menu key to toggle between func-
tion options. For functions that need to be activated and
require value selections, you may toggle between OFF
and the set value (e.g. TIME OFFSET function). The round
arrow in the menu window indicates that the value is to be
set by means of the universal knob in the CURSOR/MENU
control panel. If the respective function includes an additi-
onal menu level, it will be indicated by a small triangle on
the bottom right of a menu item. If additional menu pages
are available, you can navigate these on the same level by
using the last menu item. It includes the number of menu
pages on this level as well as the current page number.
You can advance to the next page by pressing the appro-
priate soft menu key. Once the last page was listed, the
displaywillloopbacktotherstpage.
Fig. 2.3: Control panels of
sections B, C and D
28
C
29
30
33
31
34
35
36
32
37
D
38
37
41
39
42
43
44
40
18
B
19
20
22
23
24
21
25
26
27

10
Introduction
2.5 Basic Settings and Integrated Help
You can access important basic settings such as language
for user interface and help, general settings and interface
settings in the menu that opens when you press the SE-
TUPkeyintheGENERALsection.Ontherstpageofthe
menu for the basic settings you can select the language
for user interface and help. The menu item INTERFACE
activatesthemenustoperformtheinterfaceconguration
(USB or Ethernet). The menu item PRINTER includes set-
tings for POSTSCRIPT and PCL compatible printers. When
pushing this soft menu key, a submenu opens allowing the
user to select the paper format and color mode. Using the
assigned soft menu key, the top menu item PAPER FOR-
MAT allows you to choose from A4, A5, B5, B6, Executive,
Letter and Legal in either portrait or landscape format. Use
the universal knob in the CURSOR/MENU section to select
the appropriate format. Following the same setup proce-
dure, the menu item COLOR MODE allows you to choose
between Grayscale, Color and Inverted. The Grayscale
mode converts the color image to a grayscale image which
can be printed on a black-and-white postscript printer.
The Color mode prints the image in color as shown on the
screen (black background). The INVERTED mode prints the
color image with a white background on a color printer thus
saving toner and ink.
The menu item DEVICE INFORMATION opens a window
with detailed information on hardware and software of the
measuring instrument. The soft menu key DEVICE NAME
allowsyoutodeneanamewithupto19characterswhich
will be listed when screenshots are printed. The soft menu
MENU allows you to select whether soft menus are to be
closed manually or automatically after 4-30s. Use the soft
menu key LOGO IN SCREENSHOT to determine whether
the R&S logo displays on the top right corner of printouts or
not.
The soft menu UPDATE for the instrument and help update
and LICENCES to upgrade software options will be descri-
bed in detail in the following chapters. The soft menu DATE
& TIME is used to set the date and time. The soft menu
SOUND is used to set the sound options. You can activate a
sound as beeping during setup, in the event of an error and
for the triggers.
The integrated help can be activated by pushing the HELP
key in the GENERAL section. This opens a window with ex-
planatory text. The text in the help window is dynamically
updated with descriptions of the corresponding setting or
function. If you no longer require help, push the HELP key
to close the HELP option. This will turn the LED indicator
for the key off and the text window for the help will close.
2.6 Instrument Firmware Update
The R&S®HMO1002 resp. R&S®HMO1202 series is con-
stantly being advanced. You can download the current
rmwareatwww.rohde-schwarz.com.Thermwareis
packedinaZIPle.AfterdownloadingtheZIPle,unpack
the data to the base directory of a USB stick. Then connect
the USB stick with the USB port of the oscilloscope and
press the SETUP key in the GENERAL section of the con-
trol panel. The menu item UPDATE can be found on page
2|2. Selecting this menu item opens a window displaying
version number, date and build information of the currently
installedrmware.PressingthesoftmenukeyUPDATE
theinstrumentrmwarewillresultinasearchforthecor-
respondingleontheUSB stick. The information for the
newrmwaretobeinstalledwillthenbedisplayedonthe
stick below the row labeled NEW:. The version number
willbedisplayedinredincasetheexistingrmwareonthe
instrument is identical to the latest version; otherwise the
version number will be shown in green. Only if this is the
case, press the soft menu EXECUTE to start the update.
2.7 Options / Voucher
The R&S®HMO1002 resp. R&S®HMO1202 series includes
options which allow you to expand the range of application
for the instrument (such as bandwidth upgrade or bus
analysis functions). At this time, the options R&S®HOO10/
HOO11/HOO12 resp. R&S®HOO512/HOO712/HOO572 are
available for the R&S®HMO1002 series and the options
R&S®HOO10/HOO11/HOO12 resp. R&S®HOO312/HOO313/
HOO323 are available for the R&S®HMO1202 series. The
bandwidth options R&S®HOO572, R&S®HOO512 and
R&S®HOO712, R&S®HOO312, R&S®HOO313 and
R&S®HOO323 resp. the bus analysis functions
R&S®HOO10, R&S®HOO11 and R&S®HOO12 can be
purchased ex factory with the R&S®HMO1002 resp.
R&S®HMO1202 series. The bandwidth upgrade vouchers
R&S®HV572, R&S®HV512, R&S®HV712, R&S®HV312,
R&S®HV313 and R&S®HV323 and the bus analysis upgrade
Bandwidth Upgrades R&S®HMO1002 Series
Description Optionen-Code Voucher-Code
Bandwidth upgrade 50 MHz to 70 MHz R&S®HOO572 R&S®HV572
Bandwidth upgrade 50 MHz to 100 MHz R&S®HOO512 R&S®HV512
Bandwidth upgrade 70 MHz to 100 MHz R&S®HOO712 R&S®HV712
Bandwidth Upgrades R&S®HMO1202 Series
Description Optionen-Code Voucher-Code
Bandwidth upgrade 100 MHz to 200 MHz R&S®HOO312 R&S®HV312
Bandwidth upgrade 100 MHz to 300 MHz R&S®HOO313 R&S®HV313
Bandwidth upgrade 200 MHz to 300 MHz R&S®HOO323 R&S®HV323
Bus Analysis Options
Description Optionen-Code Voucher-Code
I2C, SPI, UART/RS-232 on analog and
digital channels R&S®HOO10 R&S®HV110
I2C, SPI, UART/RS-232 on all analog
channels R&S®HOO11 R&S®HV111
CAN und LIN on analog and digital
channels (only R&S®HMO1002,
R&S®HMO1202) R&S®HOO12 R&S®HV112
Tab. 2.1: Overview R&S®HMO1002/1202 Options / Voucher
1) only when ordering with a R&S®HMO1002 resp. R&S®HMO1202
2) Activation of R&S®HMO1002/HMO1202 options via upgrade voucher

11
Introduction
vouchers R&S®HV110, R&S®HV111 and R&S®HV112 allow
for an upgrade at a later date via licence key. The installed
optionsandvoucherscanbeveriedunderDEVICE
INFORMATION in the SETUP menu.
Once you have entered the voucher code on the
homepage http://voucher.hameg.com, the licence key will
begenerated(„SERIALNUMBER.hlk“).TheASCIIlemay
be opened with an editor. This allows you to read the
actual key in plain text. You can choose between two
methods to enable the desired option with this key: an
automated reading or manual input. The automated
reading via USB stick is the fastest and easiest method.
StorethelicenceleonaUSB stick and then install it to
the instrument using the FRONT USB port. Press the
SETUP key in the GENERAL section of the HMO control
paneltoopentheSETUPmenu.Youwillndthe
LICENCES menu on page 2|2. Press the soft menu key
READKEYSfromlicenceletoopenthelemanager.
Selecttherequiredlicencelewiththeuniversalknobin
the CURSOR/MENU section and then use the soft menu
key LOAD to load it. This will load the licence key, making
the option instantly available by restarting the instrument.
Alternatively, you can enter the licence key manually.
Select the menu UPGRADE and press the soft menu key
INPUT KEY manually. This will open an input window. Use
Fig. 2.4: UPGRADE menu
the universal knob in the CURSOR/MENU section and the
ENTER key to enter the licence key manually. After
entering the complete key, press the soft menu key
ACCEPTtoconrmtheentry.Theoptionwillbeactivated
after restarting the instrument.
The R&S®HMO1002 resp. R&S®HMO1202 series is prepa-
red for mixed-signal operation and have the appropriate
connectors on the front panel. Connecting an 8-channel
logic probe R&S®HO3508 equips the scope with 8 logic
channels.
2.8 Self Alignment
The R&S®HMO1002 resp. R&S®HMO1202 series features
an integrated self alignment procedure to achieve the
highest possible accuracy. During the standard self align-
menttheinstrumentadjustsverticalaccuracy,offset,time
baseandseveraltriggersettingsandsavestheidentied
correction data internally. To start the self alignment in the
SETUP menu, press the soft menu key SELF ALIGNMENT
and press the START key. The procedure will run for about
5-10 minutes. Each step and its corresponding progress
will be shown in a bar display.
2.8.1 Logic Probe Self Alignment
The self alignment for the optional logic probe
R&S®HO3508 primarily aligns the switching levels. To start
the self alignment for the logic probe, it is necessary that
the logic probe type R&S®HO3508 is connected to the
R&S®HMO1002 resp. R&S®HMO1202 series. It is impera-
tive that the bit connectors are not connected. To start the
The instrument must have reached the required operating tempe-
rature (switched on for at least 20 minutes) and all inputs must
be unused, in other words all cables and probes must be removed
from the inputs.
Fig. 2.6: Self alignment successful
If an error occurs during the self alignment although it has been
carried out as described, please send the exported .log le (see
Self Alignment menu) to [e-mail].
You can save the .log le to a USB stick.
Fig. 2.5: Manual input of the license key

12
Introduction
process, select the menu item LOGIC PROBE in the SELF
ALIGNMENT soft menu. The process is similar to the basic
instrument alignment but it only takes a few seconds.
2.9 Education Mode
The education mode allows you to deactivate the AUTO-
SET, QUICK VIEW and Auto measuring functions. When
this mode is activated (function is marked in blue), a
Fig. 2.7: Self alignment logic probe
message will display on the screen. In addition, the home
screen, the instrument information and a screenshot will
indicate that the education mode has been activated. To
deactivate this mode, press the soft menu key EDUCA-
TION MODE again, and the blue marking will disappear.
2.10 Back Panel of the Instrument
Onthebackpaneloftheinstrument,youwillndthe
Ethernet/USB interface which is permanently installed in
the instrument. Optional interfaces are not available.
Fig. 2.8: Back panel

13
Quick Start Guide
3 Quick Start Guide
The following chapter is an introduction to the most impor-
tant R&S®HMO1002 resp. R&S®HMO1202 series features
and settings allowing you to use the instrument promptly.
The integrated calibrator signal output is used as the signal
sourcewhichmeansthattherststepswillnotrequireany
additional instruments.
3.1 Setting up and turning the instrument on
To optimally set up the instrument, position the handle so
that the display will be inclined slightly upwards. Plug the
power cord into the rear panel conn
1
on the front panel.
The display appears after a few seconds, and the oscillo-
scope is ready for operation. Press the AUTOSET key
15
until a beep. This will reset the most important oscillo-
scope settings to their default settings.
3.2 Connection of a probe and signal capture
Take one of the provided probes and remove the protective
cap from the tip. Apply the probe compensation box to the
BNC connector for channel 1 and turn it to the right until it lat-
ches into place. On the right hand side of the screen, you will
see the short menu for channel 1. Press the soft menu key to
the right of each menu item to select frequently used settings.
Press the top soft menu key to change the input coupling to
Make sure to align the passive probes prior to their rst use. For
more information, please refer to the probe manual. Place the
probe in the appropriate position on the ADJ. output.
DC.BrieypresstheAUTOSETkeyonce
15
.
After a few seconds, the oscilloscope will have automati-
cally selected the sensitivity, time base and trigger settings. A
square wave signal will now be shown.
3.3 Display of signal details
With the time base knob
43
you can change the dis-
played time window. Turning
it CCW increases the time
base. Continue to turn the
knob CCW until you can read
“TB:5ms” in the upper left
corner of the screen. Press
the ZOOM key
40
. You will
see the two window display:
The upper section of the
window displays the entire
captured signal whereas
the lower section shows an
enlarged section. Use the
time base knob to select the
zoom factor. The small knob
allows you to determine the horizontal position of the sec-
tion. Press the ZOOM key
40
again to deactivate the zoom
mode.
Fig. 3.3: Screen display after changing to DC coupling
Fig. 3.4: Screen display after Autosetup
Fig. 3.2: Screen display after connection of the probe
37
D
38
37
41
39
42
43
44
40
Fig. 3.5: Section D of the
control panel with zoom key
3
A
5
15 16
8 11 14
9 10
67
12 13
4
17
Fig. 3.1:
Control
panel of
section A

14
Quick Start Guide
❙amplitude, number of rising edges,
❙pos. pulse width, neg. pulse width,
❙pos. duty cycle, neg. duty cycle.
Withjustonekey,youcanviewallavailableparameters
simultaneously that characterize the signal. This feature
always applies to the currently active display channel. You
may also display parameters for several signals. For this
option, press the Quickview
10
key twice to deactivate this
mode, press the CH2 key
23
to activate CH2 and press the
AUTO MEASURE
11
key to open the menu as displayed
below. Pressing the MEAS. PLACE soft key will display a
list. Use the universal knob in the CURSOR/MENU section
to choose the appropriate measurement place. The para-
meters will be displayed at the bottom of the screen. This
menuallowsyoutodenetheparameters.
Press the CH2 key in the VERTICAL section. This will
activate CH2. Press the AUTOMEASURE key to return to
thedenitionmenu.SelectMeasurementPlace1,select
MEAN as measurement type and CH1 as source. Press the
MEAS. PLACE soft menu key on top to select the second
measurementplace.Denethemeasurementplaceasbe-
fore as RMS value with the voltage of CH2. Once the menu
isclosed,parameterscanbeeasilyidentiedbythecolors
of the respective source signal (in this instance, yellow for
channel 1 and blue for channel 2).
Fig. 3.7: Quick View parameter measurement
Fig. 3.8: Selection of parameters
3.4 Cursor Measurements
After displaying and reviewing the signal, the next step
will introduce cursor measurements of the signal. Again,
brieypresstheAUTOSETkeyoncefollowedbythe
CURSOR/MEASURE key. You can now select the desired
type of measurement cursor from the menu. Press the
soft menu key MEASURE TYPE to open the appropri-
ate selection menu. You can specify your selection with
the universal knob in the CURSOR/MENU section of the
control panel. Turn the knob CCW until the entry V MAR-
KER is marked in blue. Press the MENU OFF key to close
the menu or wait until it automatically closes after a few
seconds. Now two cursors will be shown along the signal
as well as the measurement results on the bottom of the
display. Press the universal knob to select the active cursor
and turn the universal knob to position the cursor. The
cursor measurement results will be shown on the bottom
of the display. In this example with the entry “V marker”,
the display includes the voltage at both cursor positions,
their difference, and the time difference between the cur-
sor positions. To switch off the cursor, press the CURSOR
MEASURE key again.
3.5 Automatic Measurements
In addition to cursor measurements the most important
signal parameters can be displayed. Your oscilloscope of-
fers these possibilities:
❙Displaydenitionof6parametersfromvaryingsources
❙Quick display of all important parameters of one source
by use of the QUICK VIEW feature
Please change the time base to 100 µs per scale division
and press the QuickView
10
key. You will see the most im-
portant parameters of a signal displayed:
❙positive and negative peak voltages
❙rise and fall times
❙mean voltage
10 additional parameters are shown below the grid:
❙RMS, peak-peak voltage,
❙frequency, period,
Fig. 3.6: ZOOM function

15
Quick Start Guide
3.6 Mathematical functions
In addition to cursor and automatic measurements, the
R&S®HMO1002 resp. R&S®HMO1202 series can also ap-
ply mathematical operations to the signals. Pressing the
MATH
26
key opens a menu enabling you to apply addi-
tion, subtraction, multiplication or division to two analog
channels. This also displays the mathematical graph. The
topsoftmenukeyallowsyoutoselecttherstoperand.
With the key below, you can select the operator. The soft
menu key below that allows you to select the second ope-
rand. Only activated and displayed channels are available
for the operands. The sources selected in the function
must be activated so that the mathematical graph can be
calculated and the result signals can be displayed.
3.7 Storing data
The R&S®HMO1002 resp. R&S®HMO1202 series is able to
store 4 different types of data:
❙Device settings
❙Reference signals
❙Traces
❙Screenshots
Out of these data types, signals and screen displays can only
be stored on a USB stick. All other data types can be stored
on a USB stick or internally in the instrument to non-volatile
storagemedia.Tostoredatayouhavetodenethedata
type and the destination to be used for storing. First attach
a USB stick to the front USB connector of your oscilloscope.
Press the Save/Recall
12
key to open the respective menu.
Select the type of data you wish to store by pressing the res-
pective soft menu key (in this example SCREENSHOTS). This
will open the settings menu. In the top menu make sure that
Storage Front is selected. Press the soft menu key to open
the menu where you can select these settings. It is impor-
tant to connect a USB stick with the front USB connector of
your oscilloscope which must be recognized by your instru-
ment. Pressing the soft menu key SAVE allows you to save a
screenshotusingthedefaultlename(thecurrentlename
is displayed in the menu item FILE NAME). You can also se-
lectanameforthetargetlewithupto8characters.Select
the menu item FILE NAME and use the universal knob to
enter the name (in this example “TRC”).
Fig. 3.9: Save/Recall menu
Press the soft menu key ACCEPT. The oscilloscope accepts
the name and returns to the settings menu. Here you can
store the current image by pressing the soft menu key SAVE.
Alternatively, you can move up one level in the menu by
using the OFF key on the bottom and select the menu item
FILE/PRINT. In the following menu press the soft menu key
SCREENSHOTS. This will assign the function Screenshot to
the FILE/PRINT
17
key with the selected settings. This enab-
les you to generate a screenshot on your USB stick by pres-
sing the FILE/PRINT key at any given time using any menu.
Fig. 3.10: Screenshot menu

16
Vertical System
4 Vertical System
You can select vertical set-
tings using knobs for the
vertical position and the
sensitivity. You may also use
a menu that is permanently
displayed as well as an ad-
vanced menu. You can select
for which channel you want
the settings to be activated
by pressing the respective
channel key. Once a channel
has been activated, the key
will be marked by a colored
LED light. Additionally, the
screen display will include a
frame around the activated
channel with a frame and a
color brighter than that of deactivated channels. The cor-
responding short menu is always visible and you can push
the Menu
21
key to activate the advanced menu.
4.1 Coupling
Theanalogchannelshaveaninputimpedanceof1MΩor
50ΩwiththeR&S®HMO1202series.TheR&S®HMO1002
serieshaveonlyaninputimpedanceof1MΩ.
.
The50Ωinputimpedanceshouldonlybeselectedifthe
signal sourceis50Ω,e.g.ageneratorwitha50Ωoutput
where the termination within the scope is to be used. In
allothercases1MΩistobeselected.Theuserdetermi-
nes if DC coupling or AC coupling is to be used. With DC
coupling, the DC voltage of the signal will be displayed.
With ACcoupling,aninputlterof2Hzsuppressesthe
display of DC voltage. Signals of up to 200 V (peak value)
maybeconnecteddirectlyto1MΩinputs.Highervoltages
can be measured with external probes (up to 40kV peak
voltage). This should only be used with DC coupling. For
all general applications, the probes supplied with the ins-
Fig. 4.1: Short menu for vertical settings
Do not connect the 50 Ω inputs to effective voltage higher than 5V.
trument will be used. With the R&S®HMO1002 series the
HZ154 probe is included in delivery which offers 10:1 /
1:1 switchable attenuation. The attenuation setting has to
be set manually in the channel menu. The R&S®HMO1202
series is delivered with the RT-ZP03 probe.
You can set the coupling using the short menu or channel
menu. Simply press the respective soft menu key to set
the coupling and the graphic inversion of the input chan-
nel. The menu applies to the corresponding active channel.
The illuminated channel key indicates which channel is
active. You can switch between channels by pressing the
respective channel key.
4.2 Sensitivity, Y Positioning and Offset
You can select the sensitivity of the analog inputs by using
the knob in the VERTICAL section (VOLTS/DIV) in 1-2-5
steps of 1mV/div to 10V/div. The knob is associated with
the active channel (push the respective channel key to
activate the desired channel). Pushing the knob once will
switch to a continuous sensitivity setting. You can use
the smaller knob in the VERTICAL section (POSITION) to
determine vertical settings for the active channel. Press
the MENU key to access advanced options. On page 2|2 of
this menu, you can add a DESKEW. To activate this offset
push the corresponding soft menu key. You can set the
offset value using the universal knob or the KEYPAD key
in the CURSOR/MENU section. Each analog channel may
be shifted in time by ±32ns. This deskew setting is used
to compensate different signal delays when using different
cable lengths or probes.
4.3 Bandwidth Limit and Signal Inversion
Both the short menu and the advanced menu enable you
to insert an analog 20 MHz lowpassltertothesignal
path. This will eliminate all higher frequency interference.
Toactivatethelterintheshortmenu,presstherespec-
tive soft menu key BWL. In the advanced channel MENU
the bandwidth limit will be set with the soft menu key
BANDWIDTH.Oncethelterisactivated,themenuitem
willbemarkedinblue,andtheidentierBWwillbedis-
played in the channel information window. Signal inversion
is available in the short menu and the advanced menu in
theVERTICALsection.Anactivatedlterwillbeindicated
in blue in the menu and by a bar above the channel name
in the channel name window.
4.4 Probe Attenuation and Unit Selection
(Volt/Ampere)
The R&S®HMO1002 resp. R&S®HMO1202 series does not
includes an integrated probe attenuation detection. You
can manually set the attenuation factor in the advanced
MENU in the VERTICAL section. This is possible with the
predenedstepsx1,x10,x100,x1000or,usingtheuniver-
salknobortheKEYPADkey,asdenedbytheuserfrom
x0.001 to x1000. In this menu, you can also select the unit
Ampere in case you are using a current probe. If you select
the unit Ampere (A), the menu shows the most common
factors (1V/A, 100mV/A, 10mV/A, 1mV/A). You may also
Fig. 4.1: Control panel for the
vertical system
18
B
19
20
22
23
24
21
25
26
27

17
Vertical System
use the USER setting to select any given value. You can set
the value using the universal knob or the KEYPAD key in
the CURSOR/MENU section. This setting may also be used
to measure the voltage via shunt. All measurements are
always displayed with the correct unit and scale.
4.4.1 Probe Compensation
You can perform the probe compensation via compen-
sation wizard or manually. To open the wizard, press the
SETUP key in the GENERAL section, and then press the
soft menu key PROBE COMP. This compensation wizard
will guide you through all the important points of the probe
compensation. After connecting a probe, you can select
the respective analog channel via soft menu key CHAN-
NEL 1 (CH1) or CHANNEL 2 (CH2). The enclosed probe
stylus allows you to set the probe trimmers to an optimal
square wave shape.
The compensation is performed at 1 kHz (LF) and 1MHz
(HF). Use the soft menu FULL SCREEN to hide the wizard
help entries. Select NEXT STEP to toggle the wizard into
the 1MHz HF compensation. If multiple probes are con-
nected, you can switch the channel via soft menu key
NEXT CHANNEL. Use the EXIT option to exit the wizard
after a successful probe compensation. If you would like to
perform a manual compensation without the compensa-
tion wizard, choose the UTIL menu in the Vertical control
panel, then select the soft menu key PATTERN GEN. in the
soft menu SQUARE WAVE (see chapter 10.2.1).
4.5 Threshold Setting
On page 2|2 in the advanced MENU in the VERTICAL
section you can set a THRESHOLD. This thresholddenes
the level to detect a High or a Low if analog channels are
used as source for the serial bus analysis or logic trig-
ger. After selecting this soft menu item, you can set the
threshold using the universal knob or the KEYPAD key.
With the soft menu key HYSTERESIS a range around the
trigger thresholdlevelcanbeset.Ifthesignaljittersinside
Make sure to align passive probes prior to their rst use, after an
extended measurement break, or when switching instruments or
channels.
Fig. 4.2: Probe compensation wizard
this range and crosses the trigger level thereby, no trigger
event occurs. With FIND LEVEL will automatically analyze
thesignalandndanapproriatelevel.
4.6 Naming a Channel
The last entry NAME in the VERTICAL menu opens a
submenu which allows you to enter a channel name. This
name will be displayed on the grid and the printout. Your
rstoptionistoswitchthedisplayon(ON)oroff(OFF).
The next option includes the menu item LIBRARY. After
selecting this option, you can use the universal knob to
choose a name from several suggestions. The EDIT LA-
BEL key allows you to enter a completely new name or
to customize the suggested name. You may enter up to 8
characters.UsetheACCEPTkeytoconrmthenamein
the editor. It will then be shown in the display. The name
isassignedtothatspecicsignalandwillmovealongside
any set offset value.
Fig. 4.3: Name selection

18
Horizontal System
5.3 Acquisition modes
The acquisition modes are selected by pressing the AC-
QUIRE
44
key. This opens a display menu which offers the
following acquisition modes:
5.3.1 Ro ll
Thisacquisitionmodeisintendedspecicallyforvery
slow signals, with the untriggered signal „rolling“ across
the screen from right to left (requires signals slower than
200 kHz). The R&S®HMO1002 resp. R&S®HMO1202 series
uses a ring buffer to store the signal values in roll mode.
Simplyput,theinstrumentwritestherstdivisiontothe
rststoragespace,theseconddivisiontothesecond
storage space, etc. Once the storage is full, the instrument
overwritestherststoragespacewiththedataofthe
most recent measurement value. This creates a „ring“ or
cycle run, similar to a ticker.
5.3.2 Arithmetic
The soft menu ARITHMETIC offers following menu items:
❙REFRESH:
This mode allows the capture and display of current
signals.
❙ENVELOPE:
In this mode, the display includes the normal capture of
each signal and the maximum as well as the minimum
values of each capture. Over time, this creates an
envelope surrounding the signal.
❙AVERAGE:
In this mode, you can use the universal knob in the
Cursor/Menu section of the control panel to set the
number of signal periods for averaging, available in
powers of 2 from 2 to 1024 (requires repetitive signals).
❙SMOOTH:
The function SMOOTH is used to calculate the mean
valuefromseveraladjacentsamplingpoints.Theresultis
a smooth waveform. This function is used for non-perio-
dic signals.
❙FILTER:
In this mode, you can activate a lowpasslterwith
adjustablecutofffrequencytosuppressunwantedhigh
frequency interferences. The cut off frequency can be set
based on the sampling frequency. The minimum setting is
1/100 of the sampling frequency and the maximum value
is 1/4 of the sampling rate. You can select this setting with
the universal knob.
5.3.3 Peak Detect
This mode is used for very large time base settings to
detect even short signal changes. You can also deactivate
this function within the menu (OFF) or you can select the
automatic switching mode (AUTO). The following condi-
tions must be met to activate the PEAK DETECT mode:
❙Function HIGH RESOLUTION is deactivated
❙None of the serial or parallel buses are active
The ZOOM feature is not available in the roll mode (also refer to
Chap. 5.5 ZOOM Function)
5 Horizontal System
In the HORIZONTAL system
section, users can select time
base settings for capturing,
trigger time position, zoom
functions, acquisition modes,
marker functions and search
functions. Knobs allow you to
set time base and trigger time
position. A menu enables you
to select the desired acquisi-
tion mode. A separate key is
available to activate the zoom.
Use the arrow keys
37
and the SET/CLR key to select
marker functions.
5.1 Acquisition modes RUN and STOP
The acquisition mode can be selected with the RUN/
STOP key
39
In Run mode signals are shown on the screen
according to the selected trigger conditions, discarding
previously captured signals with each new capture. If you
wish to analyze a captured signal on the screen without
overwriting it, capture must be stopped by pressing the
RUN/STOP key. While in STOP mode, you may not capture
new signals and the key is illuminated in red.
5.2 Time Base Settings
The TIME/DIV knob in the HORIZONTAL section of the
control panel is used to change the time base. The current
time base setting (e.g.”TB: 500 ns”) is displayed in the up-
per right above the graticule. To the right of the display you
can see the trigger time position in relation to the default
setting. The default setting shows the trigger time position
in the center of the display, with 50% of the signal display
before and 50% after this trigger position. The X-POSITION
knob
41
allowscontinuousadjustmentofthexposition.
The maximum values allowed depend on the time base
setting.
Pushing the SET/CLR key resets the value to its reference
position as long as the marker or search functions have not
been applied. The arrow keys
37
allow you to change
theXpositionbyaxedamountof5divisionsinthe
respective direction. The MENU
42
key opens a menu to
determine the function for the arrow keys
37
and the
SET/CLR key. As described above, these keys allow you to
set the X position. Alternatively, you can use them to mark
events within the signal with the option to navigate bet-
ween up to 8 markers. In the submenu NUMERIC INPUT
you can enter any horizontal position directly. This menu
also allows you to activate and set search functions. You
can also set the TIME REFERENCE (position for the trigger
reference point, from -6 divisions to +6 divisions with 0
being the center and default setting).
37
D
38
37
41
39
42
43
44
40
Fig. 5.1: Control panel of the
horizontal system

19
Horizontal System
During peak detection, the oscilloscope distinguishes bet-
ween two types:
❙Acquisition peak detection:
Each A/D converter converts at the full sampling rate (no
Interlace mode), even if results have not been written to
the acquisition memory at full sampling rate (for slow time
bases, for instance). If peak detection is activated, unused
converter values will be evaluated to detect minimum and
maximumamplitudes.Duringthisprocess,theidentied
minimum and maximum values including sampling
interval are written to the acquisition memory. As a result,
the acquisition memory stores data pairs representing the
signal sequence according to the sampling interval. The
smallest detectable pulse is the period of the maximum
sampling rate (no Interlace mode). This describes the
so-called acquisition peak detection.
❙Memory peak detection:
A hardware peak detection is not available if data is
written to the acquisition memory at the ADC‘s maximum
sample rate. For slow time bases and the record mode is
set to AUTOMATIC or MA.WFM.RATE, not all data from
the acquisition memory will display on the screen. With
peak detection activated when reading out, skipped data
will be used to create a minimum and maximum value.
The smallest detectable pulse is the period of the sample
rate used to write to the acquisition memory. This
describes the so-called memory peak detection.
If one of the peak detection modes or a combination of
the two are used, the corresponding detection mode is
marked with „PD“ in the upper right of the display.
5.3.4 High Resolution
ThismodeusesBoxcarAveragingviaadjacentdetection
points (i.e. the converter runs at the maximum sampling
rate) to increase the vertical resolution to up to 16 bit. You
can deactivate this function within the menu (OFF) or you
can select the automatic switching mode (AUTO).
Averagingseveraladjacentsamplingratescreatesavalue
with a higher degree of accuracy than the input data. The
resulting data is called high resolution data. The process
of merging multiple sampling rates to one new value only
allows a sampling rate that is smaller than the maximum
value. If the HIGH RESOLUTION mode is activated and
the current instrument setting allows the use of the HIGH
RESOLUTION mode, the detection mode is marked with
„HR“ in the upper right of the display.
The following requirements must be met to activate the
HIGH RESOLUTION mode:
❙Sampling rate is smaller than the maximum sampling rate
(no Interlace mode)
❙Peak detection is deactivated
❙No active logic pod
❙None of the serial or parallel buses are active
By default, all functions listed above are deactivated.
5.3.5 Interpolation
With the soft menu item INTERPOLATION users can se-
lect Sinx/x, Linear or Sample-Hold as interpolation type to
display acquired data points. The default setting is Sinx/x
interpolation which is the best option for displaying analog
signals. Linear interpolation (LINEAR) uses a line to con-
nect acquired data points. SAMPLE-HOLD allows a more
precise assessment of the position for the acquired data
points.
5.3.6 Record Mode
This soft menu item provides the following functions:
5.3.6.1 MAX. WFM.-RATE
This mode allows you to select the memory depth and
sampling rate to obtain the maximum trigger repeat rate.
This mode allows you to select the memory depth and
sampling rate to obtain the maximum trigger repeat rate.
When using the MAX. WAVEFORM RATE mode, the oscil-
loscope is set to display the maximum amount of captures
per second in the signal window. Each column in the signal
window displays a captured date. When peak detection is
activated, each column displays a pair of min/max values.
The R&S®HMO1002 resp. R&S®HMO1202 series displays
a signal window of 600x400 pixels (Yt without zoom). This
translates into 600 data points per detection. When peak
detection is activated, 600 pairs of min/max values or 1,200
data values are displayed. The memory depth corresponds
to at least the displayed time window (time base x signal
window grid section in horizontal direction) multiplied by
the current sampling rate. The minimum value is deter-
mined by the maximum sampling rate and the maximum
signal repeat rate of the oscilloscope. The displayed samp-
ling rate corresponds to the current sampling rate divided
by the amount of data skipped while reading out from the
acquisition memory. If peak detection is activated, the dis-
played sampling rate corresponds to the current sampling
rate.
5.3.6.2 MAX. SA. RATE
If this function is activated, the instrument always sets
the maximum sampling rate while using the maximum
memory available. The MAX. SAMPLE RATE function
always uses the maximum sampling rate and displays
Fig. 5.2: AM modulated signal with maximum repeat rate

20
Horizontal System
the maximum amount of data. Each column in the signal
window displays up to 40 detected data values (limited
by processor performance). How much data is currently
displayed depends on the displayed time window and the
current sampling rate. If peak detection is activated, each
column displays up to 20 pairs of min/max values. The
memory depth always corresponds to the maximum ac-
quisition memory. The displayed sampling rate is identical
with the current sampling rate. Peak detection is used if
the displayed time window contains more data than 40 *
signal window columns in the acquisition memory or min/
max data in the acquisition memory.
5.3.6.3 AUTOMATIK
This function is the default setting and offers the best
compromise between maximum repeat rate and maximum
sampling rate (selection of memory depth). Each column
in the signal window displays up to 10 captured data va-
lues. How much data is currently displayed depends on
the displayed time window and the current sampling rate.
When peak detection is activated, each column displays
up to 5 pairs of min/max values. The memory depth is at
least twice as much as the storage capacity set for the
maximum repeat rate (limited by the maximum acquisition
Fig.5.3:ExamplegureofAMmodulatedsignalwithmax.samplingrate
memory). The displayed sampling rate corresponds to the
current sampling rate divided by the amount of data skip-
ped while loading from the acquisition memory. If peak
detection is activated, the displayed sampling rate corres-
ponds to the current sampling rate.
All settings apply the identical current sampling rate
(sampling rate used to write to the acquisition memory).
In STOP mode it is also possible to change menu items.
This does not impact the current memory depth but the
amountofdisplayeddatawillbeadjusted.Peakdetection
is also activated in STOP mode (time base in microse-
conds). In time bases displaying each sampling point, all
three settings behave identically (except used memory
depth and signal update rate). Table 5.1 displays advan-
tages and disadvantages of each setting. Finally, it needs
tobementionedthatthismenureplacestheadjustable
memory depth, a standard for other manufacturers. An
adjustablememory depth is intended to allow users to
understand the relation between memory depth, time
base and sampling rate and to evaluate advantages and
disadvantages. With this option, the oscilloscope always
captures signals with the maximum sampling rate. This al-
lows users in STOP mode to zoom in retrospectively, even
at the maximum repeat rate. It is also possible to zoom out
at the maximum repeat rate if the STOP mode was run at
fast time bases. If a high repeat rate can only be attained
Fig.5.4:ExamplegureofAMmodulatedsignalwithautomaticsetting
Setting Advantages Disadvantages Application
Maximum waveform rate: ıMany captures in one image
ıRare events can be detected more
quickly in connection with per-
sistence
ıQuick response to Operation or
change in signal
ıLow noise band
ıHigh aliasing risk
ıLow accuracy of details
ıLow accuracy of measurements
due to reduced amount of data
ıSearch for rare events
ıDisplaying modulated signals
Maximum sample rate ıMaximum accuracy of details
ıLowest aliasing risk
ıHigh accuracy of measurements
ıSlow response to operation or
change in signal
ıLow signal update rate
ıHigher visibility of noise
ıFor signals with high frequency
parts
ıAssessment of small signal
details
Automatikc: ıAverage signal update rate
ıReasonably smooth operation
ıGood accuracy of measurements
ıLow noise band
ıPossible aliasing ıDefault application
Table 5.1: Advantages and disadvantages of each setting.
The entire oscilloscope memory can only be read out in STOP
mode if the maximum sampling rate has been activated.