Anritsu 681XXC User manual

SERIES
681XXC
SYNTHESIZED SIGNAL GENERATOR
OPERATION MANUAL
P/N: 10370-10333
REVISION: B
PRINTED: APRIL 2001
COPYRIGHT 1999 ANRITSU CO.
490 JARVIS DRIVE
MORGAN HILL, CA 95037-2809

WARRANTY
The Anritsu product(s) listed on the title page is (are) warranted against defects in materials and
workmanship for one year from the date of shipment.
Anritsu’s obligation covers repairing or replacing products which prove to be defective during the
warranty period. Buyers shall prepay transportation charges for equipment returned to Anritsu for
warranty repairs. Obligation is limited to the original purchaser. Anritsu is not liable for conse-
quential damages.
LIMITATION OF WARRANTY
The foregoing warranty does not apply to Anritsu connectors that have failed due to normal wear.
Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by
the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifi-
cations of the product. No other warranty is expressed or implied, and the remedies provided herein
are the Buyer’s sole and exclusive remedies.
TRADEMARK ACKNOWLEDGEMENTS
Adobe Acrobat is a registered trademark of Adobe Systems Incorporated.
NOTICE
Anritsu Company has prepared this manual for use by Anritsu Company personnel and customers
as a guide for the proper installation, operation, and maintenance of Anritsu Company equipment
and computor programs. The drawings, specifications, and information contained herein are the
property of Anritsu Company, and any unauthorized use or disclosure of these drawings, specifica-
tions, and information is prohibited; they shall not be reproduced, copied, or used in whole or in part
as the basis for manufacture or sale of the equipment or software programs without the prior writt-
ten consent of Anritsu Company.

Safety Symbols
To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Company uses the
following symbols to indicate safety-related information. For your own safety, please read the information
carefully BEFORE operating the equipment.
WARNING WARNING indicates a hazard. It calls attention to a procedure that
could result in personal injury or loss of life if not performed properly.
Do not proceed beyond a WARNING notice until the indicated condi-
tions are fully understood and met.
CAUTION CAUTION indicates a hazard. It calls attention to a procedure which,
if not performed properly, could result in damage to or destruction of a
component of the instrument. Do not proceed beyond a CAUTION note
until the indicated conditions are fully understood and met.
The instrument is marked with this symbol to indicate that it is neces-
sary for the user to refer to the instructions in the operation manual.
Indicates ground.
Indicates heavy weight equipment.
681XXC OM Safety-1

Safety-2 681XXC OM
There are no operator serviceable components inside. Refer
servicing of the instrument to qualified service technicians.
To prevent the risk of electrical shock or damage to precision
components, do not remove the equipment covers.
WARNING
When supplying power to this equipment, always use a
three-wire power cable connected to a three-wire power line
outlet. If power is supplied without grounding the equip-
ment in this manner, there is a risk of receiving a severe or
fatal electric shock.
WARNING
For Safety
Before changing the fuse, always remove the power cord
from the power outlet. There is the risk of receiving a fatal
electric shock if the fuse is replaced with the power cord
connected.
Always use a new fuse of the type and rating specified by
the fuse markings on the rear panel of the instrument.
WARNING
Use two or more people to lift and move this equipment, or
use an equipment cart. There is a risk of back injury, if this
equipment is lifted by one person.
WARNING
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment
may be impaired.
WARNING

Table of Contents
Chapter 1 General Information
1-1 SCOPE OF MANUAL.................1-3
1-2 INTRODUCTION ...................1-3
1-3 DESCRIPTION ....................1-3
1-4 IDENTIFICATION NUMBER ............1-5
1-5 ELECTRONIC MANUAL...............1-5
1-6 RELATED MANUALS ................1-5
GPIB Programming Manual ...........1-5
SCPI Programming Manual ...........1-5
Maintenance Manual ..............1-6
1-7 OPTIONS .......................1-6
1-8 PERFORMANCE SPECIFICATIONS ........1-7
1-9 RECOMMENDED TEST EQUIPMENT .......1-8
Chapter 2 Installation
2-1 INTRODUCTION ...................2-3
2-2 INITIAL INSPECTION ................2-3
2-3 PREPARATION FOR USE ..............2-4
Power Requirements...............2-4
Line Voltage Selection ..............2-4
Power Connection ................2-4
Standby Operation................2-5
Warmup Time ..................2-6
Operating Environment .............2-6
2-4 GPIB SETUP AND INTERCONNECTION .....2-7
Interface Connector ...............2-7
Cable Length Restrictions ............2-7
GPIB Interconnection ..............2-7
Setting the GPIB Address ............2-7
Selecting the Line Terminator ..........2-9
Selecting the Interface Language.........2-9
2-5 RACK MOUNTING KIT INSTALLATION .....2-10
Preliminary ..................2-10
Procedure ...................2-10
681XXC OM i

2-6 PREPARATION FOR STORAGE/SHIPMENT . . . 2-13
Preparation for Storage.............2-13
Preparation for Shipment............2-13
Chapter 3 Local (Front Panel) Operation
3-1 INTRODUCTION ...................3-5
3-2 FRONT PANEL LAYOUT...............3-6
Line Key ....................3-6
Data Display Area ................3-6
Data Entry Area.................3-7
RF Output Control Key .............3-7
Connectors ...................3-7
3-3 DATA DISPLAY AREA ................3-8
Menu Display Format ..............3-9
Menu Keys ...................3-10
3-4 DATA ENTRY AREA.................3-12
3-5 INSTRUMENT START-UP .............3-14
Powering Up the 681XXC............3-14
Start-Up Display ................3-14
Standby Operation ...............3-14
Self-Testing the 681XXC ............3-15
Resetting to Default Parameters ........3-15
3-10 POWER LEVEL SWEEP OPERATION.......3-53
Selecting CW Power Sweep Mode ........3-53
Setting CW Power Sweep Step Size and Dwell Time3-54
Selecting a CW Power Sweep Trigger ......3-55
Selecting a Power Level Sweep Range......3-56
Selecting a Sweep Frequency/Step Power Mode . 3-58
Setting Power Level Step Size .........3-59
3-11 LEVELING OPERATIONS .............3-60
Selecting a Leveling Mode ...........3-60
Attenuator Decoupling .............3-64
ALC Power Slope................3-65
User Cal (User Level Flatness Correction) . . . 3-67
3-12 SIGNAL MODULATION ..............3-73
Amplitude Modulation Operating Modes ....3-73
Providing Amplitude Modulation ........3-73
ii 681XXC OM
Table of Contents (Continued)

Frequency Modulation Operating Modes ....3-74
Providing Frequency Modulation ........3-75
Square Wave Modulation Operating Modes . . . 3-77
Providing Square Wave Modulation .......3-77
3-13 SYSTEM CONFIGURATION ............3-80
Configuring the Front Panel ..........3-81
Configuring the Rear Panel...........3-82
Configuring the RF ...............3-83
Configuring the GPIB .............3-85
Setting Increment Sizes ............3-88
3-14 SAVING/RECALLING INSTRUMENT SETUPS . 3-89
Saving Setups .................3-89
Recalling Setups ................3-89
Erasing Stored Setups .............3-90
3-15 SECURE OPERATION ...............3-91
3-16 REFERENCE OSCILLATOR CALIBRATION . . . 3-92
Chapter 4 Local Operation–Menu Maps
4-1 INTRODUCTION ...................4-3
4-2 MENU MAP DESCRIPTION .............4-3
Chapter 5 Operation Verification
5-1 INTRODUCTION ...................5-3
5-2 TEST EQUIPMENT..................5-3
5-3 TEST RECORDS ...................5-3
5-4 INITIAL 681XXC CHECKOUT............5-4
Power Up ....................5-4
Self Test.....................5-4
Resetting the 681XXC ..............5-4
Warmup Time ..................5-4
5-5 CW FREQUENCY ACCURACY TEST........5-5
Test Setup....................5-5
Test Procedure..................5-6
5-6 POWER LEVEL ACCURACY AND FLATNESS
TESTS ........................5-13
Test Setup ...................5-13
681XXC OM iii
Table of Contents (Continued)

Power Level Accuracy Test Procedure ......5-14
Power Level Flatness Test Procedure ......5-15
Chapter 6 Operator Maintenance
6-1 INTRODUCTION ...................6-3
6-2 ERROR AND WARNING/STATUS MESSAGES. . . 6-3
Self-Test Error Messages.............6-3
Normal Operation Error and Warning/ Status
Messages ....................6-8
6-3 TROUBLESHOOTING ...............6-10
6-4 ROUTINE MAINTENANCE ............6-13
Cleaning the Fan Filter.............6-13
Cleaning the Data Display ...........6-13
Replacing the Line Fuse ............6-14
Chapter 7 Use With Other Instruments
7-1 INTRODUCTION ...................7-3
7-2 MASTER-SLAVE OPERATION ...........7-4
Connecting the Instruments ...........7-4
Initiating Master-Slave Operation ........7-5
Master-Slave Operation .............7-7
Master-Slave Operation in VNA Mode ......7-7
Terminating Master-Slave Operation.......7-9
7-3 USE WITH A 56100A SCALAR NETWORK
ANALYZER......................7-10
Connecting the 681XXC to the 56100A .....7-10
7-4 USE WITH A 360B VECTOR NETWORK
ANALYZER......................7-11
Connecting the 681XXC to the 360B ......7-11
Modes of Operation...............7-12
Source Lock Mode ...............7-12
Tracking Mode .................7-14
7-5 USE WITH A HP8757D SCALAR NETWORK
ANALYZER......................7-16
Connecting the 681XXC to the HP8757D ....7-16
Setting Up the 681XXC.............7-17
Initiating HP8757D SNA Operation.......7-19
iv 681XXC OM
Table of Contents (Continued)

Appendix A Rear Panel Connectors
A-1 INTRODUCTION...................A-1
A-2 REAR PANEL CONNECTORS ...........A-1
A-3 CONNECTOR PINOUT DIAGRAMS ........A-1
Appendix B Performance Specifications
681XXC OM v/vi
Table of Contents (Continued)