Hameg HM2005-2 User manual

200 MHz
Analog Oscilloscope
HM2005-2
Manual
English

2Subject to change without notice
General information regarding the CE marking
HAMEG instruments fulfill the regulations of the EMC directive. The
conformity test made by HAMEG is based on the actual generic- and
product standards. In cases where different limit values are applicable,
HAMEG applies the severer standard. For emission the limits for
residential, commercial and light industry are applied. Regarding the
immunity (susceptibility) the limits for industrial environment have
been used.
The measuring- and data lines of the instrument have much influence
on emission and immunity and therefore on meeting the acceptance
limits. For different applications the lines and/or cables used may
be different. For measurement operation the following hints and
conditions regarding emission and immunity should be observed:
1. Data cables
For the connection between instrument interfaces and external devices,
(computer, printer etc.) sufficiently screened cables must be used.
Without a special instruction in the manual for a reduced cable length,
the maximum cable length of a dataline must be less than 3 meters and
not be used outside buildings. If an interface has several connectors
only one connector must have a connection to a cable.
Basically interconnections must have a double screening. For IEEE-bus
purposes the double screened cable HZ72 from HAMEG is suitable.
2. Signal cables
Basically test leads for signal interconnection between test point and
instrument should be as short as possible. Without instruction in the
manual for a shorter length, signal lines must be less than 3 meters
and not be used outside buildings.
Signal lines must screened (coaxial cable - RG58/U). A proper ground
connection is required. In combination with signal generators double
screened cables (RG223/U, RG214/U) must be used.
3. Influence on measuring instruments
Under the presence of strong high frequency electric or magnetic
fields, even with careful setup of the measuring equipment, influence
of such signals is unavoidable.
This will not cause damage or put the instrument out of operation. Small
deviations of the measuring value (reading) exceeding the instruments
specifications may result from such conditions in individual cases.
4. RF immunity of oscilloscopes.
4.1 Electromagnetic RF field
The influence of electric and magnetic RF fields may become visible
(e.g. RF superimposed), if the field 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 fields.
Although the interior of the oscilloscope is screened by the cabinet,
direct radiation can occur via the CRT gap. As the bandwidth of
each amplifier stage is higher than the total –3dB bandwidth of the
oscilloscope, the influence of RF fields 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 CRT, which is unavoidable.
These effects can also be caused by direct or indirect electrostatic
discharge.
HAMEG Instruments GmbH
Die HAMEG Instruments GmbH bescheinigt die Konformität für das Produkt
The HAMEG Instruments GmbH herewith declares conformity of the product
HAMEG Instruments GmbH déclare la conformite du produit
Bezeichnung / Product name / Designation:
Oszilloskop
Oscilloscope
Oscilloscope
Typ / Type / Type: HM2005-2
mit / with / avec: HO710, HZ200
Optionen / Options / Options: HO720, HO730, HO740
mit den folgenden Bestimmungen / with applicable regulations / avec les
directives suivantes
EMV Richtlinie 89/336/EWG ergänzt durch 91/263/EWG, 92/31/EWG
EMC Directive 89/336/EEC amended by 91/263/EWG, 92/31/EEC
Directive EMC 89/336/CEE amendée par 91/263/EWG, 92/31/CEE
Niederspannungsrichtlinie 73/23/EWG ergänzt durch 93/68/EWG
Low-Voltage Equipment Directive 73/23/EEC amended by 93/68/EEC
Directive des equipements basse tension 73/23/CEE amendée par 93/68/CEE
Angewendete harmonisierte Normen / Harmonized standards applied / Normes
harmonisées utilisées:
Sicherheit / Safety / Sécurité: EN 61010-1:2001 (IEC 61010-1:2001)
Überspannungskategorie / Overvoltage category / Catégorie de surtension: II
Verschmutzungsgrad / Degree of pollution / Degré de pollution: 2
Elektromagnetische Verträglichkeit / Electromagnetic compatibility /
Compatibilité électromagnétique
EN 61326-1/A1 Störaussendung / Radiation / Emission:
Tabelle / table / tableau 4; Klasse / Class / Classe B.
Störfestigkeit / Immunity / Imunitée:Tabelle / table / tableau A1.
EN 61000-3-2/A14 Oberschwingungsströme / Harmonic current emissions /
Émissions de courant harmonique:
Klasse / Class / Classe D.
EN 61000-3-3 Spannungsschwankungen u. Flicker / Voltage fluctuations and flicker /
Fluctuations de tension et du flicker.
Datum /Date /Date
01. 04. 2007
Unterschrift / Signature / Signatur
Holger Asmussen
Manager
Hersteller HAMEG Instruments GmbH KONFORMITÄTSERKLÄRUNG
Manufacturer Industriestraße 6 DECLARATION OF CONFORMITY
Fabricant D-63533 Mainhausen DECLARATION DE CONFORMITE
General information regarding the CE marking

3
Subject to change without notice
Contents
General information regarding the CE marking 2
200 MHz 2 Channel Analog Oscilloscope HM2005-2 4
Specifications 5
Important hints 6
List of symbols used: 6
Positioning the instrument 6
Safety 6
Proper operation 6
CAT I 6
Environment of use 6
Environmental conditions 7
Warranty and repair 7
Maintenance 7
Line voltage 7
Front Panel Elements – Brief Description 8
Basic signal measurement 10
Signals which can be measured 10
Amplitude of signals 10
Values of a sine wave signal 10
DC and ac components of an input signal 11
Timing relationships 11
Connection of signals 11
First time operation and initial adjustments 12
Trace rotation TR 12
Probe adjustment and use 12
1 kHz adjustment 12
1 MHz adjustment 13
Operating modes of the vertical amplifier 13
XY operation 14
Phase measurements with Lissajous figures 14
Measurement of phase differences in dual
channel Yt mode 14
Measurement of amplitude modulation 15
Triggering and time base 15
Automatic peak triggering (MODE menu) 15
Normal trigger mode (See menu MODE) 16
Slope selection (Menu FILTER) 16
Trigger coupling (Menu: FILTER) 16
Video (tv triggering) 16
Frame sync pulse triggering 17
Line sync pulse triggering 17
LINE trigger 17
Alternate trigger 17
External triggering 17
Indication of triggered operation (TRIG’D LED) 17
Hold-off time adjustment 17
Time base B (2nd time base). Delaying,
Delayed Sweep 18
Alternate sweep 18
AUTOSET 19
Component tester 19
Data transfer 20
General information concerning MENU 22
Controls and Readout 23

4Subject to change without notice
2 Channels with deflection coefficients 1mV/div.…5V/div.
2 Time Bases: 2 ns/div.…0.5 s /div. and 2 ns/div.…20 ms/div.
Low Noise Measuring Amplifiers with high pulse fidelity
Videotrigger: Odd and even frames, Line Selection
(525/60 and 625 /50 standard)
250MHz 6-Digit Frequency Counter,
Cursor and Automatic Measurement
14kV high writing speed CRT, Readout, Autoset, Delay Line,
no Fan
Save/Recall Memories for Instrument Settings
Help Function, Multilingual Menu
RS-232 Interface (for parameter queries and control only)
200MHz Analog Oscilloscope
HM2005-2
HM2005-2
Low noise amplifiers
Full screen display of
200 MHz signal
Even fast rising edges do
not cause overshoot
HM2005-2

5
Subject to change without notice
Specifications
200 MHz Analog Oscilloscope HM2005-2
All data valid at 23 °C after 30 minute warm-up
Vertical Deflection
Channels: 2
Operating Modes: CH 1 or CH 2 separate, DUAL (CH 1 and
CH 2 alternate or chopped), Addition
X in XY-Mode: CH 1
Invert: CH 1, CH 2
Bandwidth (-3dB): 2 x 0…200 MHz
Rise time: ‹ 1,75 ns
Bandwidth Limiter (switchable):approx. 20 MHz (1 mV/div.…5 V/div.)
Deflection Coefficients (CH 1, 2): 12 calibrated steps
1…2 mV/div.: ± 3 % (0…100 MHz (-3 dB))
5 mV…5 V/div.: ± 3 % (1-2-5 sequence)
variable (uncalibrated): › 1 mV/div.…5 V/div., continuous
Inputs CH 1, 2:
Impedance: 1 MΩ II 13 pF
Coupling: DC, AC, 50 Ω, GND (ground)
Max. Input Voltage: 250 V (DC + peak AC), 50 Ω ‹ 5 Vrms
Y Delay Line (analog): 70 ns
Measuring Circuits: Measuring Category I
Auxiliary input:
Function (selectable): Ext. Trigger, Z (unblank)
Coupling (Ext. Trig./Z): all/AC, DC
Max. input voltage: 100 V (DC + peak AC)
Triggering
Automatic (Peak to Peak):
Min. signal height: 5mm
Frequency range: 10 Hz…250 MHz
Level control range: from Peak- to Peak+
Normal (without peak):
Min. signal height: 5mm
Frequency range: 0…250 MHz
Level control range: -10…+10 div.
Operating modes: Slope/ Video
Slope: Rising, falling, both
Sources: CH 1, CH 2, alt. CH 1/2 (≥8 mm), Line, Ext.
Coupling: AC: 10 Hz…250 MHz
DC: 0…250 MHz
HF: 30 kHz…250 MHz
LF: 0…5 kHz
Noise Rej. switchable
Video: pos./neg. Sync. Impulse
Standards: 525 Line / 60 Hz Systems
625 Line / 50 Hz Systems
Field: even/odd/both
Line: all/line number selectable
Source: CH 1, CH 2, Ext.
Indicator for trigger action: LED
External Trigger via: AUXILIARY INPUT (0.3 Vpp, 0…200 MHz)
Coupling: AC, DC
Max. input voltage: 100 V (DC + peak AC)
2nd Trigger
Min. signal height: 5mm
Frequency range: 0…250 MHz
Coupling: DC
Level control range: -10…+10 div.
Horizontal Deflection
Time Base
Operating modes: A, ALT (alternating A/B), B
Time base A: 20 ns/div.…0.5 s/div. (1-2-5 sequence)
Time base B: 20 ns/div.…20 ms/div. (1-2-5 sequence)
Accuracy A and B: ±3%
X Magnification x10: to 2 ns/div.
Accuracy: ±5%
Variable time base A/B: cont. 1:2.5
Hold Off time: var. 1:10 (LED-Indication)
XY Mode
Bandwidth X-Amplifier: 0…3 MHz (-3dB)
X Y phase shift: ‹ 3 ° ‹ 220kHz
Accessories supplied: Line Cord, Operators Manual and Software for Windows
on CD-ROM, 2 Probes 10:1 (HZ200), RS-232 Interface (HO710)
Optional accessories:
HO720 Dual-Interface USB/RS-232
HO730 Dual-Interface Ethernet/USB
HO740 Interface IEEE-488 (GPIB)
HZ13 Interface cable (USB) 1,8m
HZ14 Interface cable (serial) 1:1
HZ20 Adapter, BNC to 4mm banana
HZ33 Test cable 50Ω, BNC/BNC, 0,5m
HZ34 Test cable 50Ω, BNC/BNC, 1m
HZ45 19''-Rackmount Kit 4RU
HZ51 Probe 10:1 (150MHz)
HZ52 Probe 10:1 RF (250MHz)
HZ53 Probe 100:1 (100MHz)
HZ56-2 AC/DC Current probe
HZ70 Opto-Interface (with optical fiber cable)
HZ72 GPIB-Cable 2m
HZ100 Differential probe 20:1 / 200:1
HZ109 Differential probe 1:1 / 10:1
HZ115 Differential probe 100:1 / 1000:1
HZ154 Standard probe 1:1 / 10:1
HZ350 Probe 10:1 with automatically identification (350MHz)
HZ355 Slimline probe 10:1 with automatically identification (500MHz)
HZO20 High voltage probe 1000:1 (400MHz,1000Vrms)
HZO30 Active probe 1GHz (0,9pF, 1MΩ, including many accessories)
HZO50 AC/DC Current probe 20A, DC...100kHz
HZO51 AC/DC Current probe 1000A, DC...20kHz
Operation/Measuring /Interfaces
Operation: Menu (multilingual), Autoset, Help functions (multilingual)
Save/Recall internal: 9 Instrument parameter settings
Signal sources: CH 1, CH 2
Frequency counter:
6 digit resolution: › 1 MHz…250 MHz
5 digit resolution: 0.5 Hz…1 MHz
Accuracy: 50ppm
Auto Measurements: Frequency, Period, Vdc, Vpp, Vp+, Vp-
Cursor Measurements: Δt, 1/Δt (f), tr, ΔV, V to GND, ratio X, ratio Y
Resolution Readout/Cursor: 1000 x 2000 Pts
Interfaces: RS-2321)
Display
CRT: D14-375GH
Display area (with graticule): 8 div. x 10 div.
Acceleration voltage: approx. 14 kV
General Information
Component tester
Test voltage: approx. 7Vrms (open circuit), approx. 50Hz
Test current: max. 7mArms (short circuit)
Reference Potential: Ground (safety earth)
Probe ADJ Output: 1 kHz/1 MHz square wave signal 0.2 Vpp
(tr ‹ 4 ns)
Trace rotation: electronic
Line voltage: 105…253 V, 50/60 Hz ± 10 %, CAT II
Power consumption: 42 Watt at 230V, 50 Hz
Protective system: Safety class I (EN61010-1)
Operating temperature: +5…+40°C
Storage temperature: -20…+70°C
Rel. humidity: 5…80% (non condensing)
Dimensions (W x H x D): 285 x 125 x 380 mm
Weight: 5.6 kg
1) Device control and Parameter query, no CRT content transfer possible.

6Subject to change without notice
Safe operation may be endangered if any of the following
was noticed:
– 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 any improper transport (e.g. insufficient packing not
conforming to the minimum standards of post, rail or trans-
port firm)
Proper operation
Please note: This instrument is only destined for use by person-
nel well instructed and familiar with the dangers of electrical
measurements.
For safety reasons the oscilloscope may only be operated from
mains outlets with safety ground connector. It is prohibited
to separate the safety ground connection. The plug must be
inserted prior to connecting any signals.
CAT I
This oscilloscope is destined for measurements in circuits not
connected to the mains or only indirectly. Direct measurements,
Important hints
Please check the instrument for mechanical damage or loose
parts immediately after unpacking. In case of damage we advise
to contact the sender. Do not operate.
List of symbols used:
Consult the manual High voltage
STOP
Important note Ground
Positioning the instrument
As can be seen from the figures, the handle can be set into
different positions:
A and B = carrying
C = horizontal operating
D and E = operating at different angles
F = handle removal
T = shipping (handle unlocked)
STOP
Attention!
When changing the handle position, the instrument
must be placed so that it can not fall (e.g. placed
on a table). Then the handle locking knobs must be
simultaneously pulled outwards and rotated to the
required position. Without pulling the locking knobs
they will latch in into the next locking position.
Handle mounting/dismounting
The handle can be removed by pulling it out further, depending
on the instrument model in position B or F.
Safety
The instrument fulfils the VDE 0411 part 1 regulations for elec-
trical measuring, control and laboratory instruments and was
manufactured and tested accordingly. It left the factory in perfect
safe condition. Hence it also corresponds to European Standard
EN 61010-1 respectively International Standard IEC 1010-1. In
order to maintain this condition and to ensure safe operation the
user is required to observe the warnings and other directions
for use in this manual. Housing, chassis as well as all measu-
ring terminals are connected to safety ground of the mains.
All accessible metal parts were tested against the mains with
2200 VDC. The instrument conforms to safety class I.
The oscilloscope may only be operated from mains outlets with
a safety ground connector. The plug has to be installed prior to
connecting any signals. It is prohibited to separate the safety
ground connection.
Most electron tubes generate X-rays; the ion dose rate of this in-
strument remains well below the 36 pA/kg permitted by law.
In case safe operation may not be guaranteed do not use the
instrument any more and lock it away in a secure place.
Important hints
A
A
B
B
C
C
D
D
E
E
T
F
PUkT
PUkT
PUk PUk PUk PUk PUk PUk
PUkT PUkT
PUkT
PUkT
PUkT
HGOPFFD
PUkT
HGOFFD
PUOPFGkT
PUkT
PUkTKl
15pF
max
400Vp
PUOPFGkT
PUOPFGkT
PUOPFGkT
PUOPFGkT
PGkT PUOPFGkT
PUOPFGkT PFGkT
PUOPFGkTPUOPFGkT
PUOPFGkT PUOPFGkT
PUOPFGkT
HAMEG
PUOPFGkT
PUOPFGkT
PUOPFGkT
ANALOG
DIGITAL
MIXED SIGNAL
COMBISCOPE
HM1508
1 GSa · 1MB
150 MHz
PUOGkT
VOLTS/DIVV
HGOPFFD
VOLTS/DIVV
HGOPFFD
VOLTS/DIVV
HGOPFFD
PUkT
HGOPFFD
PUkT
HGOPFFD
PUkT
PUkT
PUkT
PUkT
PUkT
PUkT PUkT
PUkTKl
15pF
max
400Vp
PUOPFGkT
INPUTS
PUOPF
PUOPF
PUOPF
PUOPF PUOPF
C O M B I S C O P E
B
T
T

7
Subject to change without notice
Type of fuse:
Size 5 x 20 mm; 250V~, C;
IEC 127, Bl. III; DIN 41 662
(or DIN 41 571, Bl. 3).
Cut off: slow blow (T) 0,8A.
i.e. with a galvanic connection to circuits corresponding to the
categories II, III, or IV are prohibited!
The measuring circuits are considered not connected to the
mains if a suitable isolation transformer fulfilling safety class
II is used. Measurements on the mains are also possible if
suitable probes like current probes are used which fulfil the
safety class II. The measurement category of such probes must
be checked and observed.
Measurement categories
The measurement categories were derived corresponding to
the distance from the power station and the transients to be
expected hence. Transients are short, very fast voltage or cur-
rent excursions which may be periodic or not.
Measurement CAT IV:
Measurements close to the power station, e.g. on electricity
meters
Measurement CAT III:
Measurements in the interior of buildings (power distribution
installations, mains outlets, motors which are permanently
installed).
Measurement CAT II:
Measurements in circuits directly connected to the mains
(household appliances, power tools etc).
Measurement CAT I:
Electronic instruments and circuits which contain circuit
breakers resp. fuses.
Environment of use.
The oscilloscope is destined for operation in industrial, business,
manufacturing, and living sites.
Environmental conditions
Operating ambient temperature: +5 °C to +40 °C. During trans-
port or storage the temperature may be –20 °C to +70°C.
Please note that after exposure to such temperatures or in
case of condensation proper time must be allowed until the
instrument has reached the permissible temperature, resp.
until the condensation has evaporated before it may be turned
on! Ordinarily this will be the case after 2 hours. The oscillo-
scope is destined for use in clean and dry environments. Do
not operate in dusty or chemically aggressive atmosphere or if
there is danger of explosion.
The operating position may be any, however, sufficient ventila-
tion must be ensured (convection cooling). Prolonged operation
requires the horizontal or inclined position.
STOP
Do not obstruct the ventilation holes!
Specifications are valid after a 30 minute warm-up period
between 15 and 30 degr. C. Specifications without tolerances
are average values.
Warranty and repair
HAMEG instruments are subjected to a strict quality control.
Prior to leaving the factory, each instrument is burnt-in for 10
hours. By intermittent operation during this period almost all
defects are detected. Following the burn-in, each instrument is
Important hints
tested for function and quality, the specifications are checked
in all operating modes; the test gear is calibrated to national
standards.
The warranty standards applicable are those of the country
in which the instrument was sold. Reclamations should be
directed to the dealer.
Only valid in EU countries
In order to speed reclamations customers in EU countries may
also contact HAMEG directly. Also, after the warranty expired,
the HAMEG service will be at your disposal for any repairs.
Return material authorization (RMA):
Prior to returning an instrument to HAMEG ask for a RMA
number either by internet (http://www.hameg.com) or fax. If
you do not have an original shipping carton, you may obtain one
by calling the HAMEG service dept (++49 (0) 6182 800 500) or by
sending an email to [email protected].
Maintenance
Clean the outer shell using a dust brush in regular intervals.
Dirt can be removed from housing, handle, all metal and plastic
parts using a cloth moistened with water and 1 % detergent.
Greasy dirt may be removed with benzene (petroleum ether) or
alcohol, there after wipe the surfaces with a dry cloth. Plastic
parts should be treated with an antistatic solution destined
for such parts. No fluid may enter the instrument. Do not use
other cleansing agents as they may adversely affect the plastic
or lacquered surfaces.
Line voltage
The instrument has a wide range power supply from 105V to
253V, 50 or 60 Hz ±10%. There is hence no line voltage selec-
tor.
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 exchanged.
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.

8Subject to change without notice
Front Panel Elements – Brief Description
1
POWER (pushbutton) 23
Turns scope on and off.
2
INTENS (knob) 23
Intensity for trace and readout brightness, focus, trace
rotation and other control functions.
3
FOCUS, TRACE, MENU (pushbutton) 23
Calls the ”Int. Knob” menu to be displayed and enables the
change of different settings using the INTENS knob. See
item 2.
4
CURSOR MEASURE (pushbutton) 23
Opens menu for Cursor Measurement selection and acti-
vation
5
SAVE/RECALL (pushbutton) 24
Offers access to the instrument settings memory.
6
SETTINGS (pushbutton) 25
Opens menu for language and miscellaneous function.
7
AUTOSET (pushbutton) 25
Enables appropriate, signal related, automatic instrument
settings.
8
HELP (pushbutton) 25
Switches help texts regarding controls and menus on and
off.
9
POSITION 1 (knob) 25
Controls position of actual present functions
11
: Signal,
Cursor and Trace Separation (time base B).
10
POSITION 2 (knob) 25
Controls position of actual present functions
11
: Signal,
Cursor and Trace Separation (time base B).
11
CH1/2-CURSOR-TRACE SEP (pushbutton) 26
Calls the menu and indicates the current function of POSI-
TION 1 and 2 controls (CH1/2 not lit).
12
VOLTS/DIV-VAR (knob) 26
Channel 1 Y deflection coefficient and variabel setting.
13
VOLTS/DIV-VAR (knob) 26
Channel 2 Y deflection coefficient and variabel setting.
14
AUTO MEASURE (pushbutton) 27
Calls menu for automatic measurement selection and
deactivation.
15
LEVEL A/B (knob) 27
Trigger level control for time base A and B.
16
MODE (pushbutton) 28
Calls selectable trigger modes.
17
FILTER (pushbutton) 28
Calls selectable trigger filter (coupling), noise reject and
trigger slope menu.
18
SOURCE (pushbutton) 29
Calls trigger source menu (e.g. CH1, CH2, Alt. 1/2, External,
AC Line).
19
TRIG’d (LED) 29
Lit on condition that trigger signals meets trigger conditi-
ons.
20
NORM (LED) 29
Lit on condition that NORMAL triggering is present.
21
HOLD OFF (LED) 29
Lit if a hold off time >0% is chosen in time base menu (HOR
VAR pushbutton
26
).
22
X-POS / DELAY (pushbutton) 29
Calls and indicates the actual function of the HORIZONTAL
knob
23
, (X-POS = dark).
23
HORIZONTAL (knob) 30
Controls horizontal position of trace and delay time of time
base B.
24
TIME/DIV - VAR (knob) 30
Time base A and B deflection coefficient and time base
variable control.
25
MAG x10 (pushbutton) 31
10 fold expansion in X direction in Yt mode, with simulta-
neous change of the deflection coefficient display in the
readout.
26
HOR VAR (pushbutton) 31
Calls time base A and B mode setting, time base variable
and hold off control.
27
CH1 VAR (pushbutton) 32
Calls channel 1 menu with input coupling (AC, DC, GND)
and termination (1 MΩ, 50Ω), inverting, probe and Y variable
control.
28
VERT/XY (pushbutton) 33
Calls vertical mode selection, addition, XY mode and band-
width limiter.
29
CH2 VAR (pushbutton) 33
Calls channel 2 menu with input coupling (AC, DC, GND)
and termination (1 MΩ, 50Ω), inverting, probe and Y variable
control.
30
CH1 (BNC-socket) 34
Channel 1 signal input and input for horizontal deflection in
XY mode.
31
CH2 (BNC-socket) 34
Channel 2 signal input and vertical deflection input in XY
mode.
32
AUX (pushbutton) 34
If external triggering is not chosen, activation/deactivation
of AUXILIARY INPUT (33) for intensity modulation (Z) and
input coupling selection.
Front Panel Elements – Brief Description
The figures indicate the page for complete descriptions
in the chapter CONTROLS AND READOUT ▼

9
Subject to change without notice
33
AUXILIARY INPUT (BNC-socket) 35
Input for external trigger or intensity (Z) modulation si-
gnal.
34
PROBE ADJ (socket) 35
Square wave signal output for frequency compensation of
x10 probes.
35
PROBE COMPONENT TESTER (pushbutton) 35
Calls menu for COMPONENT TESTER on/off, frequency
selection of PROBE ADJ signal, information of instrument
hardware, software and interface if installed.
36
COMPONENT TESTER (2 sockets with 4 mm Ø) 35
Connectors for test leads of the Component Tester. Left
socket is galvanically connected with protective earth.
37
MENU OFF (pushbutton) 35
Switches the menu display off or one step back in the menu
hierarchy.
Front Panel Elements – Brief Description
VA R VA R VA R x 10
FOCUS
TRACE
VOLTS / DIV
VAR
VOLTS / DIV
VAR
TIME / DIV
VAR
X-POS
INTENS
!
LEVEL A/B
MENU
AUX
AUXILIARY INPUT
HORIZONTAL
INPUTS
1MΩII13pF
max
250 Vp
CAT I
!
CAT I
!
DELAY
TRACE
SEP
CH 1/2
CURSOR
SAVE/
RECALL AUTOSET
SETTINGS HELP
POSITION 1 POSITION 2
VERT/XY
HM2005-2
ANALOG
OSCILLOSCOPE
200 MHz
TRIGGER
MODE
FILTER
SOURCE
TRIG’d
NORM
HOLD OFF
AUTO
MEASURE
CURSOR
MEASURE
TRIG. EXT. / Z-INP.
CH 1 CH 2
X-INP
CH 1 CH 2 HOR MAG
1MΩII
13pF
max
100 Vp
5 V 1 mV 5V 1 mV 0.5s 20ns
CH I MENU
AC/DC/50 Ω
GND
50 Ω/ 1 MΩ
INVERT
ON / OFF
VARIABLE
ON / OFF
PROBE
1 : 1 / 10 / 100
CH I: 500 mV
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PROBE
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ANALOGSCOPE
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10 Subject to change without notice
Basic signal measurement
Signals which can be measured
The oscilloscope HM2005-2 can display all repetitive signals
with a fundamental repetition frequency of at least 200 MHz.
The frequency response is 0 to 200 MHz (-3 dB). The vertical
amplifiers will not distort signals by overshoots, undershoots,
ringing etc.
Simple electrical signals like sine waves from line frequency
ripple to hf will be displayed without problems. However, when
measuring sine waves, the amplitudes will be displayed with
an error increasing with frequency. At 120 MHz the amplitude
error will be around –10 %. As the bandwidths of individual
instruments will show a certain spread (the 200 MHz are a
guaranteed minimum) the actual measurement error for sine
waves cannot be exactly determined.
Pulse signals contain harmonics of their fundamental frequency
which must be represented, so the maximum useful repetition
frequency of non sinusoidal signals is much lower than 200 MHz
(5 to 10 times). The criterion is the relationship between the rise
times of the signal and the scope; the scope’s rise time should
be <1/3 of the signal’s rise time if a faithful reproduction without
too much rounding of the signal shape is to be preserved.
The display of a mixture of signals is especially difficult if it
contains no single frequency with a higher amplitude than
those of the other ones as the scope’s trigger system normally
discriminates by amplitude. This is typical of burst signals for
example. Display of such signals may require using the HOLD-
OFF control.
Composite video signals may be displayed easily as the instru-
ment has a tv sync separator. The maximum sweep speed of
2 ns/cm allows sufficient time resolution, e.g. a 200 MHz sine
wave will be displayed one period per 2.5 cm.
The vertical amplifier inputs may be DC or AC coupled. Use DC
coupling only if necessary and preferably with a probe.
Low frequency signals when AC coupled will show tilt (ac low
frequency – 3 dB point is 1.6 Hz), so if possible use DC coupling.
Using a probe with 10:1 or higher attenuation will lower the –3
dB point by the probe factor. If a probe cannot be used due to
the loss of sensitivity, DC coupling the scope and an external
large capacitor may help which, of course, must have a sufficient
dc rating. Care must be taken, however, when charging and
discharging a large capacitor.
DC coupling is preferable with all signals of varying duty cycle,
otherwise the display will move up and down depending on the
duty cycle. Of course, pure DC can only be measured with DC
coupling. The readout will show which coupling was chosen:
= stands for DC, ~ stands for AC. For hf measurement an in-
ternal 50Ω terminator can be activated which is indicated by an
Ω symbol in the readout.
Amplitude of signals
In contrast to the general use of rms values in electrical en-
gineering oscilloscopes are calibrated in Vpp as that is what is
displayed. To derive rms from Vpp: divide by 2.84. To derive Vpp
from rms: multiply by 2.84.
Values of a sine wave signal
Vrms = rms value
Vpp = pp – value
Vmom = momentary value, depends on time vs period.
The minimum signal for a one cm display is 1 mVpp ±5 % provi-
ded 1 mV/cm was selected and the variable is in the calibrated
position.
The available sensitivities are given in mVpp or Vpp. The cursors
let you read the amplitudes of the signals immediately on the
readout as the attenuation of probes is automatically taken into
account. Even if the probe attenuation was selected manually
this will be overridden if the scope identifies a probe with an
identification contact as different. The readout will always give
the true amplitude.
It is important that the variable be in its calibrated position.
The sensitivity may be continuously decreased by using the
variable (see Controls and Readout). Each intermediate value
between the calibrated positions 1–2–5 may be selected. Thus
a maximum of 100 Vpp may be displayed without using a probe
(5 V/div x 8 cm screen x 2.5 variable).
Amplitudes may be directly read off the screen by measuring
the height and multiplying by the V/div. setting.
STOP
Please note!
Without a probe the maximum permissible voltage
at the inputs must not exceed 250 Vp irrespective of
polarity.
In case of signals with a DC content the peak value DC + AC
peak must not exceed + or – 250 VP. Pure AC of up to 500 VPP
is permissible.
STOP
If probes are used their possibly higher ratings are
only usable if the scope is DC coupled.
In case of measuring dc with a probe while the scope input is
AC coupled the capacitor in the scope input will see the input
DC voltage as it is in series with the internal 1 MΩ resistor.
This means that the maximum DC voltage (or DC + peak AC) is
that of the scope input, i.e. 250 VP! With signals which contain
DC and AC the DC content will stress the input capacitor while
the AC content will be divided depending on the AC impedance
of the capacitor. It may be assumed that this is negligible for
frequencies >40 Hz.
Considering the foregoing you may measure DC signals of
up to 600 V or pure AC signals of up to 1200 VPP with a HZ200
probe. Probes with higher attenuation like HZ53 100:1 allow
you to measure DC up to 1200 V and pure ac of up to 2400 VPP.
(Please note the derating for higher frequencies, consult the
HZ53 manual). Stressing a 10:1 probe beyond its ratings will
Basic signal measurement
VpVrms
Vmom
Vpp