Anritsu 69197B, 69147B, 69187B, 69177B, 69117B User Manual

SERIES 690XXB/691XXB

SYNTHESIZED CW/SIGNAL GENERATORS

MAINTENANCE MANUAL

490 JARVIS DRIVE

MORGAN HILL, CA 95037-2809

P/N: 10370-10347 REVISION: C PRINTED: AUGUST 2003

COPYRIGHT 2003 ANRITSU CO.

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 consequential 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 specifications 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, specifications, 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 writtten consent of Anritsu Company.

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
	Operation Manual . . . . . . . . . . . . . . . . 1-5
	GPIB Programming Manual . . . . . . . . . . . 1-5
	SCPI Programming Manual . . . . . . . . . . . 1-5
1-7	OPTIONS . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-8	LEVEL OF MAINTENANCE . . . . . . . . . . . . . 1-8
	Troubleshooting		. . . . . . . . . . . . . . . .	. 1-8
	Repair . . .	. .	. . . . . . . . . . . . . . . .	. 1-8
	Calibration	. . . . . . . . . . . . . . . . . . . 1-8
	Preventive Maintenance . . . . . . . . . . . . . 1-8
1-9	STATIC-SENSITIVE COMPONENT HANDLING
	PRECAUTIONS . . . . . . . . . . . . . . . . . . . 1-8
1-10	PREVENTIVE MAINTENANCE . . . . . . . . . . 1-10
1-11	STARTUP CONFIGURATIONS. . . . . . . . . . . 1-11
1-12	RECOMMENDED TEST EQUIPMENT . . . . . . 1-12
1-13	EXCHANGE ASSEMBLY PROGRAM . . . . . . . 1-14
1-14	REPLACEABLE SUBASSEMBLIES AND PARTS 1-14

Chapter 2 - Functional Description

2-1	INTRODUCTION . . . . . . . . . . . . . . . . . . .	2-3
2-2	690XXB/691XXB MAJOR SUBSYSTEMS . . . . . .	2-3

Digital Control. . . . . . . . . . . . . . . . . . 2-3 Front Panel . . . . . . . . . . . . . . . . . . . 2-4 Frequency Synthesis . . . . . . . . . . . . . . . 2-4 Analog Instruction . . . . . . . . . . . . . . . . 2-5 YIG, SDM, SQM Driver . . . . . . . . . . . . . 2-5 ALC/Modulation . . . . . . . . . . . . . . . . . 2-8

690XXB/691XXB MM

i

Table of Contents (Continued)

	RF Deck . . . . . . . . . . . . . . . . . . . . . 2-8
	Power Supply . . . . . . . . . . . . . . . . . . 2-8
	Inputs/Outputs . . . . . . . . . . . . . . . .	. 2-8
	Motherboard/Interconnections . . . . . . . . . . 2-9
2-3	FREQUENCY SYNTHESIS . . . . . . . . . . . . . 2-9
	Phase Lock Loops . . . . . . . . . . . . . . . . 2-9
	Overall Operation . . . . . . . . . . . . . . .	2-10
	RF Outputs 0.00001 to 65 GHz . . . . . . . . .	2-13
	Frequency Modulation (691XXB only) . . . . . .	2-14
	Analog Sweep Mode (691XXB only) . . . . . . .	2-14
	Step Sweep Mode. . . . . . . . . . . . . . . .	2-15
2-4	ALC AND MODULATION. . . . . . . . . . . . . .	2-15
	ALC Loop Operation . . . . . . . . . . . . . . 2-15
	Amplitude Modulation (691XXB only) . . . . . .	2-18
	Square Wave Modulation (691XXB only) . . . .	2-18
2-5	RF DECK ASSEMBLIES . . . . . . . . . . . . . .	2-19
	RF Deck Configurations . . . . . . . . . . . .	2-19
	YIG-tuned Oscillator . . . . . . . . . . . . . . 2-20
	Power Level Control and Modulation . . . . . .	2-20
	RF Signal Filtering . . . . . . . . . . . . . . . 2-25
	0.01 to 2 GHz Down Converter . . . . . . . . .	2-26
	0.01 to 2.2 GHz Digital Down Converter . . . .	2-27
	Switched Doubler Module. . . . . . . . . . . . 2-28
	Source Quadrupler Module . . . . . . . . . . . 2-29
	Power Level Detection/ALC Loop . . . . . . . . 2-30
	Step Attenuators . . . . . . . . . . . . . . . . 2-31

Chapter 3 - Performance Verification

3-1	INTRODUCTION . . . . . . . . . . . . . . . . . . . 3-3
3-2	RECOMMENDED TEST EQUIPMENT . . . . . . . 3-3
3-3	TEST RECORDS . . . . . . . . . . . . . . . . . . . 3-3
3-4	CONNECTOR AND KEY LABEL NOTATION . . . 3-3
3-5	690XXB/691XXB POWER LEVELS . . . . . . . . . 3-6
3-6	INTERNAL TIME BASE AGING RATE TEST . . . 3-7
	Test Setup . . . . . . . . . . . . . . . . . . . . 3-7
	Test Procedure. . . . . . . . . . . . . . . . . . 3-8

ii	690XXB/691XXB MM

Table of Contents (Continued)

3-7	FREQUENCY SYNTHESIS TESTS . . . . . . . . 3-10
	Test Setup . . . . . . . . . . . . . . . . . . . 3-10
	Coarse Loop/ YIG Loop Test Procedure . . . . .	3-10
	Fine Loop Test Procedure . . . . . . . . . . . . 3-11
3-8	SPURIOUS SIGNALS TEST: RF OUTPUT
	SIGNALS 2 GHz ( 2.2 GHz UNITS
	W/OPTION 21A) . . . . . . . . . . . . . . . . . .	3-12
	Test Setup . . . . . . . . . . . . . . . . . . . 3-12
	0.01 - 2 GHz Test Procedure . . . . . . . . . .	3-12
	0.01 - 2.2 GHz Test Procedure. . . . . . . . . . 3-15
3-9	HARMONIC TEST: RF OUTPUT SIGNALS
	FROM 2 TO 20 GHz . . . . . . . . . . . . . . . .	3-16
	Test Setup . . . . . . . . . . . . . . . . . . . 3-16
	2 - 10 GHz Test Procedure . . . . . . . . . . .	3-17
	11 - 20 GHz Test Procedure . . . . . . . . . .	3-18
3-10	SINGLE SIDEBAND PHASE NOISE TEST . . . . 3-20
	Test Setup . . . . . . . . . . . . . . . . . . . 3-20
	Test Procedure . . . . . . . . . . . . . . . . . 3-21
3-11	POWER LEVEL ACCURACY AND FLATNESS
	TESTS. . . . . . . . . . . . . . . . . . . . . . . .	3-24
	Test Setup . . . . . . . . . . . . . . . . . . . 3-24
	Power Level Accuracy Test Procedure . . . . . .	3-25
	Power Level Flatness Test Procedure . . . . . .	3-26
3-12	AMPLITUDE MODULATION TEST . . . . . . . . 3-28
	Test Setup . . . . . . . . . . . . . . . . . . . 3-28
	AM Input Sensitivity Procedure. . . . . . . . .	3-29
3-13	FREQUENCY MODULATION TESTS . . . . . . . 3-31
	Test Setup . . . . . . . . . . . . . . . . . . . 3-31
	FM Input Sensitivity Procedure. . . . . . . . . 3-32

Chapter 4 - Calibration

4-1	INTRODUCTION . . . . . . . . . . . . . . . . . . . 4-3
4-2	RECOMMENDED TEST EQUIPMENT . . . . . . . 4-3
4-3	TEST RECORDS . . . . . . . . . . . . . . . . . . . 4-3
4-4	CALIBRATION FOLLOWING SUBASSEMBLY
	REPLACEMENT. . . . . . . . . . . . . . . . . . . 4-4
4-5	CONNECTOR AND KEY LABEL NOTATION . . . 4-4

690XXB/691XXB MM

iii

Table of Contents (Continued)

4-6	INITIAL SETUP. . . . . . . . . . . . . . . . . . . .	4-7
	Interconnection . . . . . . . . . . . . . . . . . 4-7
	PC Setup — Windows 3.1 . . . . . . . . . . . .	4-8
	PC Setup — Windows 95/Windows 98 . . . . . .	4-10
4-7	PRELIMINARY CALIBRATION . . . . . . . . . .	4-13
	Equipment Setup . . . . . . . . . . . . . . . . 4-13
	Calibration Steps . . . . . . . . . . . . . . . . 4-14
	Alternate Reference Oscillator Calibration . . .	4-17
4-8	SWITCHED FILTER SHAPER CALIBRATION . . 4-19
	Equipment Setup . . . . . . . . . . . . . . . . 4-19
	Log Amplifier Zero Calibration . . . . . . . . . 4-20
	Limiter DAC Adjustment . . . . . . . . . . . . 4-20
	Shaper DAC Adjustment . . . . . . . . . . . .	4-22
4-9	RF LEVEL CALIBRATION . . . . . . . . . . . . . 4-23
4-10	ALC SLOPE CALIBRATION (691XXB ONLY) . . . 4-24
	Equipment Setup . . . . . . . . . . . . . . . . 4-24
	ALC Slope DAC Adjustment . . . . . . . . . .	4-25
4-11	ALC BANDWIDTH CALIBRATION . . . . . . . . 4-28
	Equipment Setup . . . . . . . . . . . . . . . . 4-28
	Bandwidth Calibration . . . . . . . . . . . . .	4-28
4-12	AM CALIBRATION (691XXB ONLY) . . . . . . . .	4-30
	Equipment Setup . . . . . . . . . . . . . . . . 4-30
	AM Calibration Procedure . . . . . . . . . . .	4-31

4-13 FM CALIBRATION (691XXB ONLY) . . . . . . . . 4-34

Equipment Setup . . . . .	. . .	.	.	. . .	.	. .	4-34
FM Calibration Procedure	. . .	.	.	. . .	.	. .	4-35

Chapter 5 - Troubleshooting

5-1	INTRODUCTION . . . . . . . . . . . . . . . . . . . 5-3
5-2	RECOMMENDED TEST EQUIPMENT . . . . . . . 5-3
5-3	ERROR AND WARNING/STATUS MESSAGES. . . 5-3
	Self-Test Error Messages. . . . . . . . . . . . . 5-3
	Normal Operation Error and Warning/
	Status Messages . . . . . . . . . . . . . . . . 5-7
5-4	MALFUNCTIONS NOT DISPLAYING AN ERROR
	MESSAGE . . . . . . . . . . . . . . . . . . . . . 5-10

iv	690XXB/691XXB MM

Table of Contents (Continued)

5-5	TROUBLESHOOTING TABLES . . . . . . . . . . 5-10

Chapter 6 - Removal and Replacement Procedures

6-1	INTRODUCTION . . . . . . . . . . . . . . . . . . . 6-3
6-2	REMOVING AND REPLACING THE CHASSIS
	COVERS . . . . . . . . . . . . . . . . . . . . . . . 6-4
	Preliminary . . . . . . . . . . . . . . . . . . . 6-4
	Procedure . . . . . . . . . . . . . . . . . . . . 6-4
6-3	REMOVING AND REPLACING THE FRONT
	PANEL ASSEMBLY . . . . . . . . . . . . . . . . . 6-6
	Preliminary . . . . . . . . . . . . . . . . . . . 6-6
	Procedure . . . . . . . . . . . . . . . . . . . . 6-6
6-4	REMOVING AND REPLACING THE A3, A5,
	OR A6 PCB . . . . . . . . . . . . . . . . . . . . . . 6-8
	Preliminary . . . . . . . . . . . . . . . . . . . 6-8
	Procedure . . . . . . . . . . . . . . . . . . . . 6-8
6-5	REMOVING AND REPLACING THE A4 PCB . . . 6-8
	Preliminary . . . . . . . . . . . . . . . . . . . 6-8
	Procedure . . . . . . . . . . . . . . . . . . . . 6-8
6-6	REMOVING AND REPLACING THE A7 PCB. . . 6-10
	Preliminary . . . . . . . . . . . . . . . . . .	6-10
	Procedure . . . . . . . . . . . . . . . . . . .	6-10
6-7	REMOVING AND REPLACING THE A9, A10,
	A11, OR A12 PCB. . . . . . . . . . . . . . . . . .	6-10
	Preliminary . . . . . . . . . . . . . . . . . .	6-10
	Procedure . . . . . . . . . . . . . . . . . . .	6-10
6-8	REMOVING AND REPLACING THE A13
	OR A15 PCB . . . . . . . . . . . . . . . . . . . .	6-11
	Preliminary. . . . . . . . . . . . . . . . . . . 6-11
	Procedure . . . . . . . . . . . . . . . . . . .	6-11
6-9	REMOVING AND REPLACING THE A14 PCB . . 6-11
	Preliminary. . . . . . . . . . . . . . . . . . . 6-11
	Procedure . . . . . . . . . . . . . . . . . . .	6-11
6-10	REMOVING AND REPLACING THE A16
	OR A17 PCB . . . . . . . . . . . . . . . . . . . .	6-13
	Preliminary . . . . . . . . . . . . . . . . . .	6-13
	Procedure . . . . . . . . . . . . . . . . . . .	6-13

690XXB/691XXB MM

v

Table of Contents (Continued)

6-11	REMOVING AND REPLACING THE A18
	OR A19 PCB . . . . . . . . . . . . . . . . . . . .	6-13
	Preliminary . . . . . . . . . . . . . . . . . .	6-13
	Procedure . . . . . . . . . . . . . . . . . . .	6-13
6-12	REMOVING AND REPLACING THE REAR
	PANEL ASSEMBLY. . . . . . . . . . . . . . . . .	6-14
	Preliminary . . . . . . . . . . . . . . . . . .	6-14
	Procedure . . . . . . . . . . . . . . . . . . .	6-14
6-13	REMOVING AND REPLACING THE A21 PCB . . 6-17
	Preliminary . . . . . . . . . . . . . . . . . .	6-17
	Procedure . . . . . . . . . . . . . . . . . . .	6-17
6-14	REMOVING AND REPLACING THE
	A21-1/A21-2 PCB . . . . . . . . . . . . . . . . . .	6-18
	Preliminary . . . . . . . . . . . . . . . . . .	6-18
	Procedure . . . . . . . . . . . . . . . . . . .	6-18
6-15	REMOVING AND REPLACING THE FAN
	ASSEMBLY . . . . . . . . . . . . . . . . . . . . .	6-19
	Preliminary . . . . . . . . . . . . . . . . . .	6-19
	Procedure . . . . . . . . . . . . . . . . . . .	6-19

Appendix A - Test Records

A-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . A-1

vi	690XXB/691XXB MM

Chapter 1

General Information

Table of Contents

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
	Operation Manual . . . . . . . . . . . . . . . . 1-5
	GPIB Programming Manual . . . . . . . . . . . 1-5
	SCPI Programming Manual . . . . . . . . . . . 1-5
1-7	OPTIONS . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-8	LEVEL OF MAINTENANCE . . . . . . . . . . . . . 1-8
	Troubleshooting		. . . . . . . . . . . .	. . . . . 1-8
	Repair . . .	. .	. . . . . . . . . . . .	. . . . . 1-8
	Calibration	. . . . . . . . . . . . . . . . . . . 1-8
	Preventive Maintenance . . . . . . . . . . . . . 1-8
1-9	STATIC-SENSITIVE COMPONENT
	HANDLING PRECAUTIONS . . . . . . . . . . . . 1-8
1-10	PREVENTIVE MAINTENANCE . . . . . . . . . . 1-10
1-11	STARTUP CONFIGURATIONS. . . . . . . . . . . 1-11
1-12	RECOMMENDED TEST EQUIPMENT . . . . . . 1-12
1-13	EXCHANGE ASSEMBLY PROGRAM . . . . . . . 1-14
1-14	REPLACEABLE SUBASSEMBLIES AND PARTS 1-14

Figure 1-1. Typical Series 690XXB/691XXB Synthesized CW/Signal Generator (Model 69187B Shown)

Chapter 1

General Information

1-1

1-2

SCOPE OF MANUAL	This manual provides service information for all models of the Series
	690XXB Synthesized CW Generator and the Series 691XXB Synthe-
	sized Signal Generator. The service information includes replaceable
	parts information, functional circuit descriptions, block diagrams, per-
	formance verification tests, and procedures for calibration, trouble-
	shooting, and assembly/subassembly removal and replacement.
	(Throughout this manual, the term 690XXB/691XXB is used to refer
	to the instrument.) Manual organization is shown in the table of con-
	tents.
	NOTE
	Service information for the series 690XXB CW generators
	and series 691XXB signal generators is combined into one
	manual because identical model numbers of each series con-
	tain the same assemblies, subassemblies, and components.
	Differences between the series are noted where applicable
	throughout the manual.
INTRODUCTION	This chapter provides a general description of the Series 690XXB/
	691XXB Synthesized CW/Signal Generators, identification numbers,
	related manuals, and options. Information is included concerning level
	of maintenance, replaceable subassemblies and RF components, ex-
	change assembly program, and preventive maintenance. Static-
	sensitive component handling precautions and lists of exchangeable
	subassemblies and recommended test equipment are also provided.

1-3 DESCRIPTION	The Series 690XXB Synthesized CW Generator and the Series
	691XXB Synthesized Signal Generator are microprocessor-based, syn-
	thesized signal sources with high resolution phase-lock capability.
	They generate both discrete CW frequencies and broad (full range)
	and narrow band sweeps across the frequency range of 10 MHz to
	65 GHz. All functions of the 690XXB/691XXB are fully controllable lo-
	cally from the front panel or remotely (except for power on/standby)
	via the IEEE-488 General Purpose Interface Bus (GPIB).
	The Series 690XXB Synthesized CW Generator and the Series
	691XXB Synthesized Signal Generator each presently consists of
	seven models covering a variety of frequency ranges and power levels.
	Table 1-1, on page 1-4, lists models, frequency ranges, and maximum
	leveled output.

690XXB/691XXB MM

1-3

GENERAL	690XXB/691XXB
INFORMATION	MODELS

Table 1-1. Series 690XXB/691XXB Models

	69XXXB	Frequency			Output Power	Output Power
				Output Power		w/Electronic
	Model		(GHz)		w/Step Attenuator
						Step Attenuator
	69X17B	0.01 – 8.4 GHz		+13.0 dBm	+11.0 dBm	+9.0 dBm
	69X37B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm	+3.0 dBm
	69X47B	0.01	– 20.0 GHz	+13.0 dBm	+11.0 dBm	+3.0 dBm
		0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
	69X67B	2.0 – 20.0 GHz		+9.0 dBm	+7.0 dBm	Not Available
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
		0.01 – 2.0 GHz		+12.0 dBm	+10.0 dBm
	69X77B	2.0 – 20.0 GHz		+10.0 dBm	+8.5 dBm	Not Available
		20.0	– 40.0 GHz	+2.5 dBm	0.0 dBm
		40.0	– 50.0 GHz	+2.5 dBm	–1.0 dBm
		0.01 – 2.0 GHz		+12.0 dBm	+10.0 dBm
		2.0 – 20.0 GHz		+10.0 dBm	+8.5 dBm
	69X87B	20.0	– 40.0 GHz	+2.5 dBm	0.0 dBm	Not Available
		40.0	– 50.0 GHz	+2.0 dBm	–1.5 dBm
		50.0	– 60.0 GHz	+2.0 dBm	–2.0 dBm
		0.01 – 2.0 GHz		+12.0 dBm
		2.0 – 20.0 GHz		+10.0 dBm
	69X97B	20.0	– 40.0 GHz	+2.5 dBm	Not Available	Not Available
		40.0	– 50.0 GHz	0.0 dBm
		50.0	– 65.0 GHz	–2.0 dBm
				With Option 15A (High Power) Installed
	69X17B	0.01 – 2.0 Ghz		+13.0 dBm	+11.0 dBm	+11.0 dBm
		2.0	– 8.4 GHz	+17.0 dBm	+15.0 dBm	+11.0 dBm
	69X37B	2.0 – 20.0 GHz		+17.0 dBm	+15.0 dBm	+7.0 dBm
	69X47B	0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm	+11.0 dBm
		2.0 – 20.0 GHz		+17.0 dBm	+15.0 dBm	+7.0 dBm
		0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
	69X67B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm	Not Available
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
	69X77B	0.01	– 50.0 GHz	Standard	Standard	Not Available
	69X87B	0.01	– 60.0 GHz	Standard	Standard	Not Available
	69X97B	0.01	– 65.0 GHz	Standard	Not Available	Not Available

Note: In models with Option 22 that have a high-end frequency of £20 GHz, rated output power is reduced by 1 dB. In models with Option 22 that have a high-end frequency of >20 GHz, rated output power is reduced by 2 dB.

1-4	690XXB/691XXB MM

GENERAL	IDENTIFICATION
INFORMATION	NUMBER

1-4

1-5

IDENTIFICATION NUMBER All Anritsu instruments are assigned a unique six-digit ID number, such as “875012”. The ID number is imprinted on a decal that is affixed to the rear panel of the unit. Special-order instrument configurations also have an additional special serial number tag attached to the rear panel of the unit.

When ordering parts or corresponding with Anritsu Customer Service, please use the correct serial number with reference to the specific instrument's model number (i.e., Model 69147B Synthesized Signal Generator, Serial No. 875012).

ELECTRONIC MANUAL This manual is available on CD ROM as an Adobe Acrobat Portable Document Format ( .pdf) file. The file can be viewed using Acrobat Reader, a free program that is also included on the CD ROM. The file is "linked” such that the viewer can choose a topic to view from the displayed "bookmark” list and "jump” to the manual page on which the topic resides. The text can also be word-searched. Contact Anritsu

Customer Service for price and availablility.

1-6 RELATED MANUALS	This is one of a four manual set that consists of an Operation Manual,
	a GPIB Programming Manual, a SCPI Programming Manual, and a
	Maintenance Manual.
	Operation	This manual provides instructions for operation of
	Manual	the 690XXB/691XXB using the front panel controls.
		It also includes general information, performance
		specifications, installation instructions, and opera-
		tion verification procedures. The Anritsu part
		number for the Series 690XXB Operation Manual is
		10370-10341; the part number for the Series
		691XXB Operation Manual is 10370-10344.
	GPIB	This manual provides information for remote opera-
	Programming	tion of the 690XXB/691XXB using Product Specific
	Manual	commands sent from an external controller via the
		IEEE 488 General Purpose Interface Bus (GPIB). It
		contains a complete listing and description of all
		690XXB/691XXB GPIB Product Specific commands
		and several programming examples. The Anritsu
		part number for the Series 690XXB GPIB Program-
		ming Manual is 10370-10342; the part number for
		the Series 691XXB GPIB Programming Manual is
		10370-10345.
	SCPI	This manual provides information for remote opera-
	Programming	tion of the 690XXB/691XXB using Standard Com-
	Manual	mands for Programmable Instruments (SCPI)
		commands sent from an external controller via the

690XXB/691XXB MM

1-5

GENERAL
INFORMATION	OPTIONS

IEEE 488 General Purpose Interface Bus (GPIB). It contains a complete listing and description of each command in the 690XXB/691XXB SCPI command set and examples of command usage. The Anritsu part number for the Series 690XXB SCPI Programming Manual is 10370-10343; the part number for the Series 691XXB SCPI Programming Manual is 10370-10346.

1-7 OPTIONS

The following instrument options are available.

qOption 1, Rack Mounting. Rack mount kit containing a set of track slides (90 tilt capability), mounting ears, and front panel handles for mounting the instrument in a standard 19-inch equipment rack.

qOption 2A, 110 dB Step Attenuator. Adds a 10 dB per step attenuator with a 110 dB range for models having a high-end frequency of 20 GHz. Output power is selected directly in dBm on the front panel (or via GPIB). Rated output power is reduced.

qOption 2B, 110 dB Step Attenuator. Adds a 10 dB per step attenuator with a 110 dB range for models having a high-end frequency of 40 GHz. Output power is selected directly in dBm on the front panel (or via GPIB). Rated output power is reduced.

qOption 2C, 90 dB Step Attenuator. Adds a 10 dB per step attenuator with a 90 dB range for models having a high-end frequency of 50 GHz. Output power is selected directly in dBm on the front panel (or via GPIB). Rated output power is reduced.

qOption 2D, 90 dB Step Attenuator. Adds a 10 dB per step attenuator with a 90 dB range for models having a high-end frequency of 60 GHz. Output power is selected directly in dBm on the front panel (or via GPIB). Rated output power is reduced.

qOption 2E, 120 dB Electronic Step Attenuator. Adds a 10 dB per step electonic attenuator with a 120 dB range for models having a high end frequency of 8.4 Ghz. Output power is selected directly in dBm on the front panel (or via GPIB). Rated output power is reduced.

qOption 2F, 120 dB Electronic Step Attenuator. Adds a 10 dB per step electonic attenuator with a 120 dB range for models having a high end frequency of 20 Ghz. Output power is selected directly in dBm on the front panel (or via GPIB). Rated output power is reduced.

qOption 9, Rear Panel RF Output. Moves the RF output connector to the rear panel.

qOption 11, 0.1 Hz Frequency Resolution. Provides frequency resolution of 0.1 Hz.

1-6	690XXB/691XXB MM

GENERAL
INFORMATION	OPTIONS

qOption 14, Rack Mounting without Chassis Slides. Modifies rack mounting hardware to install unit in console that has mounting shelves. Includes mounting ears and front panel handles.

qOption 15A, High Power Output. Adds high-power RF components to the instrument in the 2–20 GHz frequency range. Option 15A is standard in models having a high-end frequency that is >40 GHz.

qOption 16, High-Stability Time Base. Adds an ovenized,

10 MHz crystal oscillator with <5 x 10–10/day frequency stability.

qOptions 17A & 17B, No Front Panel. Deletes the front panel for use in remote control applications where a front panel display or keyboard control are not needed. Option 17A deletes the front panel from 691XXB models; Option 17B deletes the front panel from 690XXB models.

qOption 18, mmWave Module Bias Output. Provides bias output for 54000-xWRxx Millimeter Wave Source Modules. BNC Twinax connector, rear panel.

qOption 19, SCPI Programmability. Adds GPIB command mnemonics complying with Standard Commands for Programmable Instruments (SCPI), Version 1993. SCPI programming complies with IEEE 488.2-1987.

qOption 21A, Digital Down Converter. Replaces the standard Analog Down Converter (0.01 to 2.0 GHz) with a Digital Down Converter (0.01 to 2.2 GHz).

qOption 22, 0.1 Hz to 10 MHz Audio Frequency. Adds frequency coverage below 10 Mhz. In models having a high-end frequency of 20 GHz, rated output power is reduced by 1 dB; in models having a high-end frequency of >20 GHz, rated output power is reduced by 2 dB.

690XXB/691XXB MM

1-7

GENERAL	LEVEL OF
INFORMATION	MAINTENANCE

1-8 LEVEL OF MAINTENANCE Maintenance of the 690XXB/691XXB consists of:

qTroubleshooting the instrument to a replaceable subassembly or RF component.

qRepair by replacing the failed subassembly or RF component.

qCalibration.

qPreventive maintenance.

	Troubleshoot-	The 690XXB/691XXB firmware includes internal
	ing	diagnostics that self-test most of the internal assem-
		blies of the instrument. When the 690XXB/691XXB
		fails self-test, one or more error messages are dis-
		played to aid in troubleshooting the failure to a
		replaceable subassembly or RF component. Chapter
		5–Troubleshooting lists and describes the self-test
		error messages and provides procedures for isolat-
		ing 690XXB/691XXB failures to a replaceable subas-
		sembly or RF component.
	Repair	Most instrument failures are field repairable by
		replacing the failed subassembly or RF component.
		Detailed instructions for removing and replacing
		failed subassemblies and components are provided
		in Chapter 6–Removal and Replacement Proce-
		dures.
	Calibration	The 690XXB/691XXB may require calibration after
		repair. Refer to Chapter 4–Calibration for a listing
		of calibration requirements and calibration proce-
		dures.
	Preventive	Preventive maintenance on the 690XXB/691XXB
	Maintenance	consists of cleaning the fan honeycomb filter, de-
		scribed in paragraph 1-10.
1-9 STATIC-SENSITIVE	The 690XXB/691XXB contains components that can be damaged by
COMPONENT HANDLING	static electricity. Figure 1-2 illustrates the precautions that should be
PRECAUTIONS	followed when handling static-sensitive subassemblies and compo-
	nents. If followed, these precautions will minimize the possibilities of
	static-shock damage to these items.

NOTE

Use of a grounded wrist strap when removing and/or replacing subassemblies or components is strongly recommended.

1-8	690XXB/691XXB MM

GENERAL	STATIC-SENSITIVE COMPONENT
INFORMATION	HANDLING PRECAUTIONS

1.Do not touch exposed contacts on any static sensitive component.

4.Wear a static-discharge wristband when working with static sensitive components.

7.Handle PCBs only by their edges. Do not handle by the edge connectors.

2Do not slide static sensitive component across any surface.

5.Label all static sensitive devices.

8.Lift & handle solid state devices by their bodies – never by their leads.

3.Do not handle static sensitive components in areas where the floor or work surface covering is capable of generating a static charge.

6.Keep component leads shorted together whenever possible.

9.Transport and store PCBs and other static sensitive devices in static-shielded containers.

10.ADDITIONAL PRECAUTIONS:

Keep workspaces clean and free of any objects capable of holding or storing a static charge.

Connect soldering tools to an earth ground.

Use only special anti-static suction or wick-type desoldering tools.

Figure 1-2. Static-Sensitive Compontent Handling Precautions

690XXB/691XXB MM

1-9

GENERAL	PREVENTIVE
INFORMATION	MAINTENANCE

1-10 PREVENTIVE	The 690XXB/691XXB must always receive adequate ventilation. A
MAINTENANCE	blocked fan filter can cause the instrument to overheat and shut down.
	Check and clean the rear panel fan honeycomb filter periodically.
	Clean the fan honeycomb filter more frequently in dusty environ-
	ments. Clean the filter as follows.
	Step 1	Remove the filter guard from the rear panel by pull-
		ing out on the four panel fasteners holding them in
		place (Figure 1-3).
	Step 2	Vacuum the honeycomb filter to clean it.
	Step 3	Install the filter guard back on the rear panel.
	Step 4	Press in on the panel fasteners to secure the filter
		guard to the rear panel.

Figure 1-3. Removing/Replacing the Fan Filter Guard

1-10	690XXB/691XXB MM

GENERAL	START UP
INFORMATION	CONFIGURATION

1-11 STARTUP	The 690XXB/691XXB comes from the factory with a jumper across
CONFIGURATIONS	pins 2 and 3 of front panel connector J12 (Figure 1-4). In this configu-
	ration, connecting the instrument to line power automatically places it
	in operate mode (front panel OPERATE LED on).
	The startup configuration can be changed so that the 690XXB/691XXB
	comes up in standby mode (front panel STANDBY LED on) when it is
	connected to line power. Change the startup configuration as follows:
	Step 1	Disconnect the instrument from line power.
	Step 2	Remove the top cover from the 690XXB/691XXB.
		(Refer to Chapter 6 for instructions).
	Step 3	Locate front panel connector J12 and remove the
		jumper from across pins 2 and 3. It is located on the
		A2A1 PCB which plugs into the Front Panel Assem-
		bly.
	Step 4	Install the jumper across pins 1 and 2 of connector
		J12.
	Step 5	Install the top cover and connect the 690XXB/
		691XXB to line power. The instrument should come
		up in standby mode.

Figure 1-4. Startup Configuration of Connector J12

690XXB/691XXB MM

1-11

GENERAL	RECOMMENDED
INFORMATION	TEST EQUIPMENT

1-12 RECOMMENDED TEST	Table 1-2 provides a list of recommended test equipment needed for
EQUIPMENT	the performance verification, calibration, and troubleshooting proce-
	dures presented in this manual.

Table 1-2. Recommended Test Equipment (1 of 2)

	INSTRUMENT	CRITICAL	RECOMMENDED	USAGE (1)
		SPECIFICATION	MANUFACTURER/MODEL
	Spectrum Analyzer,	Frequency Range: 0.01 to 65 GHz	Tektronix, Model 2794, with	C, P, T
	with	Resolution Bandwidth: 10 Hz	External Mixers:
	External Mixers		WM780K (18 to 26.5 GHz)
	and		WM780A (26.5 to 40 GHz)
	Diplexer Assy		WM780U (40 to 60 GHz)
			WM780E (60 to 90 GHz)
			Diplexer Assy: 015-0385-00
	Phase Noise	Frequency Range: 5 MHz to 26.5 GHz	Aeroflex/Comstron PN9000	P
	Measurement		with
	System		PN9060-00 Status Module
			PN9470-00 Noise Output Module
			PN9450-00 Lock Control Module
			PN9342-01 Phase Detector Module
			PN9530-00 Crystal Oscillator Module
	Frequency Counter	Frequency Range: 0.01 to 40 GHz	Anritsu Model MF2414A	C, P
		Input Impedance: 50W
		Resolution: 1 Hz
		Other: External Time Base Input
	Power Meter,	Power Range: –30 to +20 dBm	Anritsu Model ML2437A or ML2438A,	C, P
	with	(1mW to 100mW)	with
	Power		Power Sensors:
	Sensors		MA2474A (0.01 to 40 GHz)
			MA2475A (0.01 to 50 GHz)
	Digital Multimeter	Resolution: 4-1/2 digits (to 20V)	John Fluke, Inc., Model 8840A, with	C, T
		DC Accuracy: 0.002% +2 counts	Option 8840A-09K (True RMS AC)
		DC Input Impedance: 10 MW
		AC Accuracy: 0.07% +100 counts
		(to 20 kHz)
		AC Input Impedance: 1 MW
	Frequency Reference	Frequency: 10 MHz	Absolute Time Corp., Model 300	P
		Accuracy: 5 x 10-12parts/day
	Function Generator	Output Voltage: 2 volts peak-to-peak	Hewlett-Packard, Model 33120A	C, P
		Functions: 0.4 Hz to 100 kHz sine and
		square waveforms
	Modulation Analyzer	Frequency Input: 10 MHz	Hewlett-Packard, Model 8901A	P
		(of the IF of the spectrum analyzer)
		AM Depth: 0% to 90%
		AM Modulation Rates: DC to 100 kHz
		Filters: 20 kHz lowpass, 300 Hz highpass

1-12	690XXB/691XXB MM

GENERAL	RECOMMENDED
INFORMATION	TEST EQUIPMENT

Table 1-2. Recommended Test Equipment (2 of 2)

	INSTRUMENT	CRITICAL	RECOMMENDED	USAGE (1)
		SPECIFICATION	MANUFACTURER/MODEL
	Oscilloscope	Bandwidth: DC to 150 MHz	Tektronix, Inc. Model TAS485	P, T
		Vertical Sensitivity: 2mV/division
		Horizontal Sensitivity: 50 ns/division
	Scalar Network	Frequency Range: 0.01 to 60 GHz	Anritsu, Model 56100A, with	C, T
	Analyzer, with		RF Detector:
	RF Detector		560-7K50 (0.01 to 40 GHz)
			560-7VA50 (0.01 to 50 GHz)
			SC5198 (40 to 60 GHz)
	Attenuator	Frequency Range: DC to 40 GHz	Anritsu, Model 41KC-10	C, P
		Max Input Power: >+17 dBm
		Attenuation: 10 dB
	Attenuator	Frequency Range: DC to 40 GHz	Anritsu, Model 41KC-20	P
		Max Input Power: >+17 dBm
		Attenuation: 20 dB
	Attenuator	Frequency Range: DC to 60 GHz	Anritsu, Model 41V-10	C, P
		Max Input Power: >+17 dBm
		Attenuation: 10 dB
	Attenuator	Frequency Range: DC to 60 GHz	Anritsu, Model 41V-20	P
		Max Input Power: >+17 dBm
		Attenuation: 20 dB
	RF Detector	Frequency Range: 0.01 to 40 GHz	Anritsu, Model 75KC50	T
		Output Polarity: Negative	(K input/BNC output connectors)
	RF Detector	Frequency Range: 0.01 to 50 GHz	Anritsu, Model 75VA50	T
		Output Polarity: Negative	(V input/BNC output connectors)
	Personal Computer	PC Configuration: IBM AT or compatible	Any common source	C
		Operating System: Windows 3.1, 95, or
		98
		Accessories: Mouse
	Serial Interface Assy	Provides serial interface between the PC	Anritsu P/N: T1678	C
		and the 690XXB/691XXB.
	Special AUX I/O	Provides interface between the 690XXB/	Anritsu P/N: 806-90	P
	Cable Assy	691XXB and the Power Meter
	Tee	Connectors: 50W BNC	Any common source	C, P
	Cables	Connectors: 50W BNC	Any common source	C, P, T

NOTES: (1) P = Performance Verification Tests (Chapter 3); C = Calibration (Chapter 4); T = Troubleshooting (Chapter 5)

690XXB/691XXB MM

1-13

GENERAL	EXCHANGE
INFORMATION	ASSEMBLY PROGRAM

1-13

1-14

EXCHANGE ASSEMBLY	Anritsu maintains an exchange assembly program for selected
PROGRAM	690XXB/691XXB subassemblies and RF components. If a malfunction
	occurs in one of these subassemblies, the defective unit can be
	exchanged. Upon receiving your request, Anritsu will ship the
	exchange subassembly or RF component to you, typically within 24
	hours. You then have 45 days in which to return the defective item. All
	exchange subassemblies or RF components are warranted for 90 days
	from the date of shipment, or for the balance of the original equipment
	warranty, whichever is longer.
	Please have the exact model number and serial number of your unit
	available when requesting this service, as the information about your
	unit is filed according to the instrument's model and serial number.
	For more information about the program, contact your local sales rep-
	resentative or call your local Anritsu service center. Refer to Table 1-5,
	on page 1-18, for a list of current Anritsu service centers.
REPLACEABLE	Table 1-3, on page 1-15, lists those replaceable subassemblies and RF
SUBASSEMBLIES AND	components of the 690XXB/691XXB that are presently covered by the
PARTS	Anritsu exchange assembly program. Table 1-4, on page 1-16, lists
	common replaceable parts for the 690XXB/691XXB that are not pres-
	ently on the exchange assembly program.
	All parts listed in Tables 1-3 and 1-4 may be ordered from your local
	Anritsu service center.

1-14	690XXB/691XXB MM

GENERAL
INFORMATION	PARTS LIST

Table 1-3. Replaceable Subassemblies and RF Components (1 of 2)

	SUBASSEMBLY OR PART NAME	ANRITSU PART NUMBER
	Printed Circuit Board Assemblies
	Front Panel Assy 691XXB	ND40832
	Front Panel Assy 690XXB	ND40514
	A3 Reference Loop PCB Assy	D40603-4
	A4 Coarse Loop PCB Assy	D40624-3
	A5 Fine Loop PCB Assy	D40625-3
	A6 Square Wave Generator PCB Assy	D37406-3
	A7 YIG Loop PCB Assy	D40627-3
	A9 PIN Control PCB Assy	D40659-3
	A10 ALC PCB Assy (691XXB)	D40610-3
	A10 ALC PCB Assy (690XXB)	D40610-4
	A11 FM PCB Assy (All 691XXBs except 69117B)	D40651-3
	A11 FM PCB Assy (69117B only)	D40651-4
	A11 FM PCB Assy (All 690XXBs except 690117B)	D40651-5
	A11 FM PCB Assy (69017B only)	D40651-6
	A12 Analog Instruction PCB Assy (691XXB)	D37448-3
	A12 Analog Instruction PCB Assy (690XXB)	D40612-3
	A13 10 MHz DDS PCB Assy	D40653-3
	A14 YIG, SDM Driver PCB Assy	40654-3
	(£40 GHz models)
	A14 YIG, SDM, SQM Driver PCB Assy	40654-4
	(>40 GHz models)
	A15 Regulator PCB Assy	D40655-3
	A16 CPU Interface PCB Assy	D37416-3
	A17 CPU PCB Assy	D37444-3
	A18 Power Supply PCB Assy	D40638-3
	A19 Power Conditioner PCB Assy	D40649-3
	A21 Line Filter/Rectifier PCB Assy	ND49529
	A21-1 BNC/AUX I/O Connector PCB Assy	ND49525
	690XXB
	A21-2 BNC/AUX I/O Connector PCB Assy	ND40526
	691XXB
	10 MHz Crystal Oscillator Assy	D37332
	RF Components
	YIG-Tuned Oscillator, 2 to 20 GHz	48514
	YIG-Tuned Oscillator, 2 to 8.4 GHz	37266
	Down Converter	D27330
	Digital Down Converter	50722-1
	Switched Doubler Module, 20 to 40 GHz	D28540
	Source Quadrupler Module, 40 to 50 GHz	D28185
	Source Quadrupler Module, 40 to 60 GHz	60-141

690XXB/691XXB MM

1-15

GENERAL
INFORMATION	PARTS LIST

Table 1-3. Replaceable Subassemblies and RF Components (2 of 2)

	SUBASSEMBLY OR PART NAME	ANRITSU PART NUMBER
	RF Components (Continued)
	Source Quadrupler Module, 40 to 65 GHz	60-142
	Coupler, 40 GHz	D27115
	Coupler, 60 GHz	D27350
	Forward Coupler, 60 GHz	C27184
	Switched Filter	D45194
	Switched Filter (w/Option 15A)	D45198
	Output Connector Assy “K”	ND39077
	Output Connector Assy “V”	ND40835
	Step Attenuator, 110 dB, 20 GHz	D27152
	Step Attenuator, 110 dB, 40 GHz	D25080
	Step Attenuator, 90 dB, 50 GHz	D27315
	Step Attenuator, 90 dB, 60 GHz	D28957
	Electronic Step Attenuator, 120 dB, 20 GHz	45720
	Diplexer, 10 MHz	46504
	Diplexer, <20 GHz	29860
	Diplexer, >20 GHz	28850

Table 1-4. Common Replaceable Subassemblies and Parts (1 of 2)

SUBASSEMBLY OR PART NAME	ANRITSU PART NUMBER
Cap, Protective (for RF Output K-Connector)	A20304
Cap, Protective (for RF Output V-Connector)	B37220
Cover, Top	D37131
Cover, Bottom	D37135
Cover, Side	D37133
Cover, Side Handle	761-67
Cover, CPU Housing	C37063
Cover, Main Card Cage	D37064
Cover, Power Supply Housing	C37062
EMI Gasket for side covers	790-437
EMI Gasket for side covers	790-390
EMI Gasket for Front Panel Assy	790-223

1-16	690XXB/691XXB MM

GENERAL
INFORMATION	PARTS LIST

Table 1-4. Common Replaceable Subassemblies and Parts (2 of 2)

	SUBASSEMBLY OR PART NAME	ANRITSU PART NUMBER
	Fan Assembly	A40513
	Fan Mount	790-425
	Fan Membrane (Honey Comb Filter)	C37137
	Fan Grill	790-426
	Fasteners (for Fan Grill)	790-433
	Fuse, 5A, 3AG Slow Blow (110 Vac)	631-33
	Fuse, 2.5A, 3AG Slow Blow (230 Vac)	631-14
	Gasket, RFI (“O”rings for MCX connectors)	790-393
	Handle, Side Carrying	783-830
	Screw, Handle Side Carrying	900-714
	Line Module	260-11
	Shield Cover	D37228
	Shield	D37229
	Standoff	785-922
	Tape	850-70
	Foot, Rear Bottom Left	2000-548
	Foot, Rear Bottom Right	2000-549
	Foot, Rear Top Left	2000-552
	Foot, Rear Top Right	2000-553
	Screw, Green Head	2000-560
	690XXB/691XXB without Front Handles Installed
	Foot, Front Bottom Left	2000-546
	Foot, Front Bottom Right	2000-547
	Foot, Front Top Left	2000-550
	Foot, Front Top Right	2000-551
	690XXB/691XXB with Front Handles Installed
	Upper Insert	B37147
	Foot, Bottom Left	C37170
	Foot, Bottom Right	C37171
	Handle, Left	D37168-2
	Handle, Right	D37169-2
	Tilt Bail	790-435

690XXB/691XXB MM

1-17

GENERAL	ANRITSU
INFORMATION	SERVICE CENTERS

Table 1-5. Anritsu Service Centers

UNITED STATES	FRANCE	JAPAN
ANRITSU COMPANY	ANRITSU S.A	ANRITSU CUSTOMER SERVICE LTD.
490 Jarvis Drive	9 Avenue du Quebec	1800 Onna Atsugi-shi
Morgan Hill, CA 95037-2809	Zone de Courtaboeuf	Kanagawa-Prf. 243 Japan
Telephone: [phone]	91951 Les Ulis Cedex	Telephone: [phone]
1-800-ANRITSU	Telephone: [phone]	FAX: [phone]
FAX: [phone]	FAX: [phone]

	GERMANY	SINGAPORE
ANRITSU COMPANY	ANRITSU GmbH	ANRITSU (SINGAPORE) PTE LTD.
10 New Maple Ave., Unit 305	Grafenberger Allee 54-56	10, Hoe Chiang Road
Pine Brook, NJ 07058	D-40237 Dusseldorf, Germany	#07-01/02 Keppel Towers
Telephone: [phone]	Telephone: [phone]	Singapore 089315
1-800-ANRITSU	FAX: [phone]	Telephone: [phone]
FAX: [phone]		FAX: [phone]

	INDIA	SOUTH AFRICA
ANRITSU COMPANY	MEERA AGENCIES PVT. LTD.	ETECSA
1155 E. Collins Blvd	23 Community Centre	12 Surrey Square Office Park
Richardson, TX 75081	Zamroodpur, Kailash Colony Extension,	330 Surrey Avenue
Telephone: 1-800-ANRITSU	New Delhi, India 110 048	Ferndale, Randburt, 2194
FAX: [phone]	Phone: [phone]	South Africa
	FAX : [phone]	Telephone: [phone]
		FAX: [phone]

AUSTRALIA	ISRAEL	SWEDEN
ANRITSU PTY. LTD.	TECH-CENT, LTD.	ANRITSU AB
Unit 3, 170 Foster Road	4 Raul Valenberg St	Botivid Center
Mt Waverley, VIC 3149	Tel-Aviv 69719	Fittja Backe 13A
Australia	Telephone: [phone]	145 84 Stockholmn
Telephone: [phone]	FAX: [phone]	Telephone: [phone]
FAX: [phone]		FAX: [phone]

BRAZIL	ITALY	TAIWAN
ANRITSU ELECTRONICA LTDA.	ANRITSU Sp.A	ANRITSU CO., INC.
Praia de Botafogo, 440, Sala 2401	Roma Office	7F, No. 316, Section 1
CEP22250-040, Rio de Janeiro, RJ, Brasil	Via E. Vittorini, 129	NeiHu Road
Telephone: [phone]	00144 Roma EUR	Taipei, Taiwan, R.O.C.
FAX: [phone]	Telephone: [phone]	Telephone: [phone]
	FAX: [phone]	FAX: [phone]

CANADA

ANRITSU INSTRUMENTS LTD.

700 Silver Seven Road, Suite 120

Kanata, Ontario K2V 1C3

Telephone: [phone]

FAX: [phone]

CHINA

ANRITSU ELECTRONICS (SHANGHAI) CO. LTD.

2F, Rm B, 52 Section Factory Building

No. 516 Fu Te Rd (N)

Shanghai 200131 P.R. China

Telephone:[phone]

FAX: [phone]

KOREA	UNITED KINGDOM
ANRITSU CORPORATION LTD.	ANRITSU LTD.
Head Office:	200 Capability Green
14F, Hyunjuk Building 832-41	Luton, Bedfordshire
Yeoksam-Dong, Kangnam-Ku	LU1 3LU, England
Seoul 135-080, South Korea	Telephone: [phone]
Telephone: [phone]	FAX: [phone]
FAX: [phone]
Service Center:
8F Hyunjuk Building
832-41, Yeoksam Dong
Kangnam-Gu
Seoul, South Korea 135-080
Telephone: [phone]
FAX: [phone]

1-18	690XXB/691XXB MM

Chapter 2

Functional Description

Table of Contents

2-1	INTRODUCTION . . . . . . . . . . . . . . . . . . . 2-3
2-2	690XXB/691XXB MAJOR SUBSYSTEMS . . . . . . 2-3
	Digital Control. . . . . . . . . . . . . . . . . . 2-3
	Front Panel . . . . . . . . . . . . . . . . . . . 2-4
	Frequency Synthesis . . . . . . . . . . . . . . . 2-4
	Analog Instruction . . . . . . . . . . . . . . . . 2-5
	YIG, SDM, SQM Driver . . . . . . . . . . . . . 2-5
	ALC/Modulation . . . . . . . . . . . . . . . . . 2-8
	RF Deck . . . . . . . . . . . . . . . . . . . . . 2-8
	Power Supply . . . . . . . . . . . . . . . . . . 2-8
	Inputs/Outputs . . . . . . . . . . . . . . . . .	2-8
	Motherboard/Interconnections . . . . . . . . . . 2-9
2-3	FREQUENCY SYNTHESIS . . . . . . . . . . . . . 2-9
	Phase Lock Loops . . . . . . . . . . . . . . . . 2-9
	Overall Operation . . . . . . . . . . . . . . .	2-10
	RF Outputs 0.00001 to 65 GHz . . . . . . . . .	2-13
	Frequency Modulation (691XXB only) . . . . . .	2-14
	Analog Sweep Mode (691XXB only) . . . . . . .	2-14
	Step Sweep Mode. . . . . . . . . . . . . . . .	2-15
2-4	ALC AND MODULATION. . . . . . . . . . . . . .	2-15
	ALC Loop Operation . . . . . . . . . . . . . . 2-15
	Amplitude Modulation (691XXB only) . . . . . .	2-18
	Square Wave Modulation (691XXB only) . . . .	2-18
2-5	RF DECK ASSEMBLIES . . . . . . . . . . . . . .	2-19
	RF Deck Configurations . . . . . . . . . . . .	2-19
	YIG-tuned Oscillator . . . . . . . . . . . . . . 2-20
	Power Level Control and Modulation . . . . . .	2-20
	RF Signal Filtering . . . . . . . . . . . . . . . 2-25
	0.01 to 2 GHz Down Converter . . . . . . . . .	2-26
	0.01 to 2.2 GHz Digital Down Converter . . . .	2-27

Table of Contents (Continued)

Switched Doubler Module. . . . . . . . . . . . 2-28

Source Quadrupler Module . . . . . . . . . . . 2-29

Power Level Detection/ALC Loop . . . . . . . . 2-30

Step Attenuators . . . . . . . . . . . . . . . . 2-31