Agilent Technologies 33120A User manual

Copyright O 1994,1999
Hewlett-Packard Company
All Rights Reserved.
PrintingHistory
Edition
1, January 1994
Edition 2, March 1994
Edition 3, May 1994
Edition 4, February 1996
Edition 5, August 1997
Edition 6, December 1999
New editions arecomplete
revisions of the manual.
Update packages, which
areissuedbetween editions,
may contain additional in-
formntion and rcplnccmcnt
pages whichyou merge into
the manual. The dates on
this page change onlywhen
a new editionispublished.
Certification
Hewlett-Packard (HP)
certifies that this product
met itspublished
specdications
at the time of shipment.
HPfurthercertifiesthat
itscalibration
measurements
aretraceable to the United
StatesNational Institute
of StandardsandTechnology
(formerly National Bureau
of Standards), to the extent
allowed by that organiza-
tion's calibration facility,
and to the calibration
facilities of other Interna-
tional Standards
Organization members.
Warranty
This
HP product iswar-
ranted against defects in
materials andworkman-
ship for a period of three
years fromdate of shipment.
Duration and conditions of
warranty for this product
may be superceded when
the product is integ~ated
into (becomesa part
OD
other HP products. During
thewarranty period, HP
will, atitsoption, either
repair or replace products
which prove
to be defective.
WarrantyService
For warranty serviceor
repair, this product must
be returned to a service
facility designated
by HP.
For products returned to
HPfor warranty service,
the Buyer shallprepay
shippingcharges to
HP
and HPshallpay shipping
chargesto return the
product to the Buyer.
However, the Buyer shall
pay allshippingcharges,
duties,and
taxes for products
returned to HP from
another country.
Limitationof Warranty
The foregoingwarranty
shallnot apply to defects
resulting fromimproper or
inadequate maintenance
by theBuyer,Buyer-supplied
products or interfacing, un-
nuthoriaodmodification
or
misuse, operation outside
of the environmental speci-
fications for the product, or
improper site preparation
or maintenance.
The design and implemen-
tation of any circuit on this
product is the solerespon-
sibilityof the Buyer.
HPdoes not warrant the
Buyer's circuitryor
malfunctions of HP
products that result from
the Buyer's circuitry.
In addition, HPdoesnot
warrant anydamage that
occursas
a result of the
Buyer's circuitoranydefects
that result from Buyer-
supplied products.
HPmakes noother
warranty,
expressed or
implied,whetherwritten
ororal
with respect to
thisproduct andspecifi-
cally dia~lailusally
implied warranty or
conditionof merchant-
ability,fitnessfor a
particularpurposeor
satisfactory quality.
ExclusiveRemedies
The remedies provided
herein arethe Buyer's sole
and exclusiveremedies.
HP ahall not bc linblcfor
anydirect,indirect,special,
incidental, or consequen-
tial damages (including
lost profit),whether based
on warranty, contract,tort,
or anyother legal theory.
Notice
The information contained
inthis document is subject
to change without notice.
Hewlett-Packardmakes
no
warranty of any kind
with regard to this material,
including,but not limited
to, theimplied warranties
of medmutsbiliiy Md fit-
ness for aparticular purpose.
Hewlett-Packard shall not
be liablefor errors contained
herein
or for incidental or
consequential damages in
connectionwith the fur-
nishing, performance, or
use of this material. No
part of this document may
be photocopied,reproduced,
or translated
to another
languagewithout the prior
written consent
of IIP.
Restricted Rights
The Software and Docu-
mentation have been
developed entirelyatprivate
expense. They aredelivered
and
licensed as "commercial
computer software"as
defined in DFPiRS
252.227-
7013
(Oct 1988), DFARS
252.211-7015 (May 1991),
or DFARS 252.227-7014
(Jun 19951, as a "commercial
item"
as defined in FAR
2.101(a), or as"restricted
computer software"as
defined in FhR 63.337-10
(Jun 1987) (or any equivalent
agencyregulationor contract
clause),whichever is appli-
cable.You have only those
rights provided for such
Softwareand Documenta-
tion by the applicable
FAR
or DFARS clauseor the HP
standard
software agreement
for the product involved.
TrademarkInformation
Windows,Windows
95, and
Windows
NT are registered
trademarks of Microsoft Corp.
Safety
Do not install substitute
parts or perform any
unauthorized modification
to the product. Return the
product
to an HPSalesand
ServiceOilicefor
service and
repair toensurethat safety
features aremaintained.
SafetySymbols
Warning
Calls attention to a proce-
dure, practice, or condition,
that could possibly cause
bodily injury or death.
Caution
Calla allal~tiuu Lu a pl oce-
dure,practice, or condition
that could possibly cause
damage to equipment or
permanent loss of data.
Earth ground symbol.
Chassisground symbol.
Warning
Only qualified, service-
trained personnelwho are
aware of the hazards
involvedshould remove the
cover from theinstrument
or connect externalwiring
to
a plug-in module.
Warning
For continued protection
against fire, replace the line
fuse onlywith a fuse of the
specifiedtype
and rating.
Manual Part Number:
33120-90014
Printed: December 1999 Edition 6
Printed inU.S.A.

--
Note: Unlessotherwise indicated, this manual applies to all Serial Numbers.
The Agilnnt Tnchnnlogies 33120A is a high-performance 15 MHz
synthesized functiongenerator with built-in arbitrary waveform
capability.Its combination of bench-top and system features makes this
functiongenerator a versatile solutionfor your testingrequirements now
and in the future.
Convenientbench-topfeatures
10standardwaveforms
Built-in 12-bit40 MSals arbitrarywaveform capability
Easy-to-useknob input
Highly visible vacuum-fluorescent display
Instrument state storage
Portable, ruggedized case with non-skidfeet
Flexible systemfeatures
Four downloadable 16,000-pointarbitrary waveform memories
GPIB (IEEE-488)interface and RS-232interface are standard
SCPI (StandardCommandsfor ProgrammableInstruments)compatibility
Optional
HP 34811A BenchLink Arb Waveform Generation Software
for Microsoft9WindowsTM
Warning
The procedures in this manual are intended for use by qualified,
service-trainedpersonnel only.
Agilent 33120A
Function Generator /
Arbitrary Waveform Generator

The Front Panel at a Glance
I FUNCTION IMODULATION I\
5 FU FSK ~urrt weep ~rb ~1st'
+ UODIN 4 Ills =ATE
( Recall Ucm
7 AM/FM -
Freq bval I Duty
p]
MODIFY A
1 Function / Modulationkeys 5 Recall 1 Storeinstrumentstate key
2 Menuoperationkeys
6 Enter Number key
3 Waveform modifykeys
7 Shift 1 ~ocalkey
4 Single / InternalTrigger key 8 Enter Number "units" keys
(Burst and Sweep only)

Front-Panel Number Entry
You canenter numbersfrom the front-panel usingone of three methods.
- ----
I Use the knoband the arrow keys to modify the displayednumber.I
- ---
Usethe arrow keys to edit individualdigits.
Incrementsthe flashing digit.
Decrements heflashing digit.
[
Moves the flashing digit to the right.
[
Movesheflashingdigit to the left.
I
Usethe "EnterNumber" mode to enter a numberwith theappropriate units. I
Use "Enter"for those operationsthat do not
requireunits
to bespecified (AM Level,
Offset,
% Duty, and StoreJRecall State).

The Front-Panel Menu at a Glance
The menu is organized in a top-down tree structurewith three levels. r-kh
To turn on menu prerr:
I3 TO move El TO movo
a up or down rlght or left
To enter command prsrs:
A: YOD MENU I, I: OYIP NENU I, C: EDIT MENU I, D: IMI MEW I, E VO MENU I) F: CAL YENU
A: MODulatlonMENU
I I: AM SHAPE r 2: AM SOURCE r 3: FM SHAPE r 4: BURSTCNT * 5: BURST RATE * 1
1 6: BURSTPHAS 1, 7: BURSTSRC r 8: FSK FREQ -9: FSKRATE r 10: FSK SRC I
lAUSHAPE*2AHSWlE* ISTARTF * INNARE* lOUTlEW* ItFWPBAWR* lSEL1RB) *
I
C
4
B: SWP (Sweep) MENU
I 1: START F r 2: STOP F r 3: SWP TIME r 4: SWP MODE I
I
C: EDIT MENU*
4
1:NEW ARB r [2:POINTS ) r [3:LINE EDlT ) r [4:WINTEDlT ) * [5:INVERT ) r (6:SAVEAS] * 7:DELETE I
* The commands enclosed insquare brackets ( [ ] ) are "hidden" until you make a selection from the
NEW ARB command to inifab a new edit session.
4
D: SYStem MENU
1 : OUTTERM r 2: POWER ON r 3: ERROR r 4: TEST r 5: COMMA r 6: REVISION I,
7: COMMA r 8: REVISION I
E: Input I Output MENU
1: HPIBADDR * 2: INTERFACE - 3: BAUD RATE * 4: PARITY * 5: LANGUAGE
F: CALibration MENU*
I 1 : SECURED * [ 1 : UNSECURED 1 r [ 2: CALIBRATE 1 r 3: CAL COUNT r 4: MESSAGE I
* The commandsenclosedin square brackets ( [ ] ) are "hidden"unlessthe function generator
is UNSECURED for calibration.

DisplayAnnunciators
Adrs
Rmt
Trig
AM
FM
Ext
FSK
Burst
swp
ERROR
Offset
Shift
Num
Arb
/L
5
'L
M
Functiongeneratoris addressed to listenor talk over a remoteinterface.
Function generator is in remotemode (remoteinterface).
Functiongeneratoriswaiting for a single trigger or externalbigger(Burst, Sweep).
AM modulationis enabled.
FM modulationisenabled.
Functiongeneratorissetfor anexternalmodulationsource
(AM, FSK, Burst).
FSK (frequency-shiftkeying) modulationisenabled.
Burstmodulationisenabled.
Sweepmode
is enabled.
Hardwareor remoteinterfacecommanderrorsare detected.
Thewaveform isbeingoutput
with an offsetvoltage.
Shift"key
has beenpressed. Press "Shift" again to turn off.
"Enter Number"mode is enabled. Press "Shift-CancePto disable.
Arbitrarywaveform function isenabled.
Sinewaveform function isenabled.
Square waveform functionisenabled.
Trianglewaveform functionis
enabled.
Rampwaveform functionisenabled.
To review the display annunciators, hold downthe
key asyou
turn on the function generator.

TheRear Panel at a Glance
-
1 Chassisground
5 ExternalTrigger l FSK / Burstmodulation
2 Power-linefuse-holder assembly inputterminal
3 Power-linevoltage setting 6 HP-IB (IEEE-488) interfaceconnector
4 AM modulationinputterminal 7 RS-232 interfaceconnector
Use the front-panelInput/Output Menuto:
Select the HP-I8 or RS-232 interface(seechapter 4 in User's Guide).
Set the HP-IBbusaddress (see chapter 4 in User's Guide).
Set the RS-232baudrate and pariiy (seechapter
4 in User's Guide).

In This Book
Specifications Chapter 1 lists the functiongenerator's specifications
and describes how to interpret these specifications.
Quick Start Chapter 2 prepares the functiongenerator foruse and
helps you get familiar with a few of its front-panel features.
MenuTutorial Chapter 3 introducesyou tothef?ont-panel menu and
describessome of the function generator's menufeatures.
CalibrationProcedures Chapter 4 prov~descalibration, verilication,
and adjustment proceduresfor the functiongenerator.
Theory of Operation Chapter 5 describesblock and circuit level theory
related to the operationthe function generator.
Service Chapter G provides guidelines for returningyour function
generator to Hewlett-Packardfor servicing, or for servicing it yourself.
ReplaceableParts Chapter 7 contains a detailed parts lists of the
functiongenerator.
Backdating Chapter 8 describes the differences between this manual
and olderissues of this manual.
Schematics Chapter 9 cnntains the function generator's block diagram,
schematics,disassembly drawings,
and componentlocatordrawings.
For information on using the Phase-Lock Optionfor the HP 33iZOA,
refer to the User's and Service Guide included with the Option 001.
Ifyou have questions relating to the operation of the
HP 33120A,
call
1-800-452-4844 in the United States, or contact your nearest
IIewktt-Fackai J Sales OfJice.
If your HP 33120Afails within threeyears ofpurchase, HP will repair
or roplcaco it fioo of charge. Call 1-800-258-5165 ("Express Exchange3
in the UnitedStates, or contactyour nearestHewlett-Pachrd Sales Ofice.

Contents
Chapter 1 Specifications
Chapter
2 Quick Start
To prepare thefunctiongenerator for use 19
To adjustthe carryinghandle 21
To setthe output frequency 22
To setthe output amplitude 23
To seta dc offsetvoltage 24
To setthe duty cycle 25
To output a stored arbitrary waveform 26
To output a dc voltage 27
To storethe instrument state 28
To rack mount the functiongenerator 30
Chapter 3 Menu Tutorial
Front-panel menu reference 35
Afront-panel menu tutorial 37
To select the output termination 42
To oulput a modulatedwaveform 43
To unsecure the functiongenerator for calibration 45
Chapter 4 Calibration Procedures
Hewlett-Packard Calibration Services 49
Calibration Interval 49
TimeRequiredfor Calibration 49
Automating Calibration Procedures 50
Recommended Test Equipment 50
Test Considerations 51
PerformanceVerificationTests 52
Frequency Verifi~ation 54
Function Gain and Linearity Verification 54
DC Function OffsetVerification 55
AC Amplitude Verification 55
Amplitude Flatness Verification 58
AM Modulation Depth Verification 59
OptionalPerformanceVerification Tests 60

Contents
Chapter 4 Calibration Procedures (contir~ued)
Calibration Security Code 62
Calibration Count 64
Calibration Message 64
General CalibrationIAdjustment Procedure 65
Aborting a Calibration inProgress 67
Frequency and BurstRate Adjustment 67
Function Gain
and LinearityAdjustment 68
AC Amplitlldc?Adj~~strnenk (High-Z) 68
Modulation Adjustment 70
AC Amplitude Adjustment (50
f2 ) 71
DC Outpllt Adjl~stm~nt 74
Duty CycleAdjustment 75
AC Amplitude Flatness Adjustment
75
OutputAmplifier Adjustment IOptional) 78
Error Messages 79
Chapter 5 Theory of Operation
Block Diagram Overview 83
OutputAttenuator 84
OutputAmplifier 85
AM Modulation 87
Pre-attenuator 88
SquareWave and Sync 88
Filters 90
Waveform DACIAmplitudeLeveling/Waveform RAM 91
Direct Digital Synthesis(DDSASIC)
93
System DACs 94
Floating Logic 95
Earth-Referenced Logic
96
Power Supplies 96
Display and Keyboard 98

Contents
Chapter 6 Service
Operating Checklist 101
Types of ServiceAvailable 102
Repackaging for Shipment 103
Electrostatic Discharge (ESD)Precautions 104
SurfaceMount Repair 104
To Replace the Power-Line Fuse 105
To Replace the Output Protection Fuse (F801) 105
TroubleshootingHints 106
Self-Test Procedures 108
Chapter 7 ReplaceableParts
Replaceable Parts 112
Chapter 8 Backdating
Backdating 126
Chapter 9 Schematics
Schematics 128
Block Diagram 129
Floating Logic Schematic 130
Digital Wavefur111 Dala Syntl~esis 131
System DAC Schematic 132
Waveform DAC Schematic 133
Filters Schematic 134
Sync, SquareWave, and Attenuator Schematic 135
Output Amplifier Schematic 136
Output Attenuator Schematic 137
Earth Reference Logic Schematic 138
Power SuppliesSchematic 139
Display and Keyboard Schematic 140
Mechanical Disassembly 141
33120-66501
Component Locator Diagram 142
33120-66502 Component Lacator Diagram 14.1

Specifications

Chapter 1 Specifications
HP 33120A Function /Arbitrary Waveform Generator
WAVEFORMS
StandardWaveforms: Sine, Square, Triangle,
Ramp, Noise, DC volts,
Sine(x)/x, NegativeRamp,
ExponentialRise,
ExponentialFall, Cardiac
Arbitrary Waveforms:
Waveform Length:
8 to 16,000 points
Amplitude Resolution: 12bits (including sign)
Sample Rate: 40 MSa
/ sec
Non-VolatileMemory: Four (4) 16kwaveforms
FREQUENCY CHARACTERISTICS
Sine!
Square:
Triangle:
Ramp:
Noise(Gaussian):
Arbitrary Waveforms:
8to 8,192 points:
8,193 to 12,287 points:
12,288 to 16,000 points:
100
HZ - 15MHz
100
HZ - 15 MHz
100pHz- 100kHz
100pHz- 100kHz
10MHz bandwidth
100pHz-5 MHz
100pH2
- 2.5 MHz
100pHz
- 200 kHz
Resolution: 10pHz or 10digits
Accuracy: 10ppmin90 days,
20 ppmin 1 year,
18°C
- 28°C
TemperatureCoefficient:
< 2 ppm / OC
Aging:
< 1OppmIyr
SINEWAVE SPECTRAL PURITY (into 50Q)
HarmonicDistortion
DC to20 kHz: -70dBc
20 kHz to I00 kHz:
-60 dBc
100kHz to 1MHz:
-45 dBc
1MHz to 15 MHz: -35dBc
TotalHarmonicDistortion
DC to20 kHz:
< 0.04%
Spurious (non-harmonic)
Output
(DC to 1MHz):
< -65 dBc
Output
(> 1MHz):
< -65dBc + 6dB/octave
PhaseNoise:
< -55dBc ina 30 kHz band
SIGNAL CHARACTERISTICS
Squarewave
RisefFallTime:
< 20ns
Overshoot:
< 4%
Asymmetry: 1%
+ 5 ns
DutyCycle: 20% to 80%
(to 5 MHz)
40% to 60% (to 75 MHz)
Triangle, Ramp, Arb
RiseIFallTime: 100ns (typical)
Linearity: < 0.1 % of peakoutput
SettlingTime:
< 250 nsto 0.5% of final value
Jitter:
< 25 ns
OUTPUT CHARACTERISTICS (1)
Amplitude (into50R): ('1
Accuracy (at 1 kHz):
Flatness
< 100kHz:
100kHzto 1MHz:
1MHz to 15 MHz:
1MHz to 15 MHz:
offset (into50R):
(3)
Accuracy: (4)
50mVpp - 10Vpp
+ 1%of specifiedoutput
(sine wave relativeto 1kHz)
+ 1% (0.1 dB)
* 1.5% (0.15 dB)
+ 2% (0.2 dB) Amp12 3Vrms
+ 3.5% (0.3 dB) Ampl<3Vm
+5Vpkac+dc
2% of setting c 2 mV
OutputImpedance: 50 ohms fixed
Resolution:
3 digits, Amplitude and Offset
OutputUnits: Vpp, Vrms, dBrn
Isolation: 42 Vpk maximumto earth
Protection: Short-circuitprotected
+ 15Vpk overdrive < 1minute
(1)Add lflOthof outputamplitudeand offset specification
per
OC for operationoutside of 18°Cto 28°C range
(I -year specification).
(2) 100mVpp - 20 Vpp amplitudeintoopen-circuitload.
(3) Offset 5 2 X peak-to-peakamplitude.
(4)Forsquare wave outputs, add 2% of output amplitude
additionalerror.

Chapter 1 Specifications
HP33120A Function/Arbitrary Waveform Generator
MODULATIONCHARACTERISTICS
AM Modulation
Carrier -3dB Freq: 10MHz
(typical)
Modulation: Any internalwaveform plusArb
Frequency: 10
mHz to 20 kHz (2 0.05% to
2.5 kHz,then decreases linearly
to
* 0.4% at upperlimit)
Depth: OYO to 120%
Source: Internal
1 External
FM Modulation
Modulation: Any internalwaveform plusArb
Frequency: 10mHz to 10kHz(+O.O5%to
600 HZ, mendecreases anearty
to
+ 0.8% at upper limit)
Peak Deviation: 10mHz to 15
MHz
Source: lntemalOnly
Burst Modulation
Carrier Frequency: 5 MHz ma.
Count: 1 to 50,000 cycles, or Infinite
Start Phase: 3600to +368
InternalRate: 10mHz to 50kHz +1%
Gate Source: Internalor ExtemalGate ($1
Trigger Source: Single, External,or InternalRate
FSK Modulation
Frequency Range: 10mHz
to 15 MHz (+ 0.05% to
600Hz, thendecreases linearly
to
+ 4% at upper limit)
InternalRate: 10mHz to 50kHz
Source: Internal
/ External(1 MHz ma.)
FREQUENCY SWEEP
Type: Linear or Logarithmic
Direction: Upor Down
Start F
I Stop F: 10mHz to 15 MHz
Time: 1ms to 500sec H.1%
Source: Single, External,or lntemal
REAR-PANELINPUTS
ExternalAM
i 5 Vpk = 100%Modulation
Modulation: 5
kn InputResistance
ExternalTrig er/FSK
3
Burst Gate: ( )
lTL (lowtrue)
Latency:
1.3 ps
Jitter: 25 ns
SYSTEM CHARACTERISTICS
ConfigurationTimes (2)
FunctionChange: (3) 80 ms
FrequencyChange: (3) 30 ms
Amplitude Change: 30 ms
OffsetChange: 10ms
SelectUserArb: 100ms
ModulationParameterChange:
< 350 ms
Arb DownloadTimes over HP-IB:
Arb Length
I Binary ( ASCII lnteger I ASCII Real (4)
Arb Length
I Binary I ASCII Integer I ASCII Real
16,000 points
8,192 points
4,096 points
2,048 points
(1) Trigger source ignoredwhen ExternalGate
is selected.
(2) Timo to changeparameterandoutputthe new signal.
(3) Modulationor sweep off.
(4) Times for 5-dif~itand 1 Pdioit n~~rnhnrs
(5) For 4800 baud, multiplythedownloadtimes bytwo;
For2400baud, multiplythe downloadtimes by four, etc.
(6) Time for 5-digitnumbers. For 12-digitnumbers,
multiplythe 5-digitnumbers bytwo.
Arb DownloadTlmes over
RS-232 at 9600 Baud: (5)
8sec
4 sec
2.5 sec
1.5 sec
16,000 points
8,192 points
4,096 points
2,048 points
81 sec
42sec
21sec
I1sec
,35sec
18 sec
10sec
6 sec
100sec
51 sec
26sec
13sec
101sec
52 sec
27 sec
14 sec
134sec
69 sec
35 sec
18 sec

Chapter 1 Specifications
HP 33120A Function / Arbitrary WaveformGenerator
GENERAL SPECIFICATIONS
power supply: lOOV/120V/22OV/240V *lo%
(switch selectable)
power-LineFrequency:
45 Hz to 66 Hz and 360 Hz to
440 Hz. Automaticallysensed
at power-on.
Power Consumption:
so VA peak (28 W average)
OperatingEnvironment: 0°C to 55°C
80% RelativeHumidityto40°C
StorageEnvironment: -40°C to
70°C
State Storage Memory: Power-off state automatically
saved. Three (3) User-
Configurable Stored States,
Arbitrarywaveformsstored
separately.
Dimensions
(W x H x D)
BenchTop: 254.4
mm x 103.6 mm x 374mm
Rack Mount:
212.6 mm x 88.5 mm x 36.3 mm
Weight:
4 kg(8.8 Ibs)
Safety Designed
to:
EMC:
Vibration and Shock:
Acoustic Noise:
Warm-UpTime:
Warranty:
RemoteInterface:
ProgrammingLanguage:
Accessories Included:
EN61010, CSAI010, UL-1224
EN55011, EN50082-1, MlL461C
(*)
(dataon file)
MIL-T-28800E,Type Ill, Class
5
(dataon file)
30 dBa
1 hour
3years standard
IEEE-488and RS-232standard
SCPI-1993, IEEE-488.2
User's Guide, ServiceGuide,
Quick Reference Card, Test
Report, andpower cord.
(I).For400
Hz operationat 120Vac, usethe I00Vac
line-voltagesetting.
(2) The HP 33120A does not meetthe performance
requirementsof MIL-461Ccharacterization. However,
performancetest data isavailableupon request.

Chapter 1 Specifications
HP 33120A Function / ArbitraryWaveform Generator
PRODUCTDIMENSIONS
A
All dimensions are
shown in millimeters.
Edition 4 February 1996 16a