Anritsu 683XXB, 682XXB User Manual

SERIES 682XXB/683XXB

SYNTHESIZED SIGNAL GENERATORS

MAINTENANCE MANUAL

490 JARVIS DRIVE

MORGAN HILL, CA 95037-2809

P/N: 10370-10290 REVISION: H 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 . . . . . . . . . . . . . . . 1-6
1-6	RELATED MANUALS . . . . . . . . . . . . . . . . 1-6
	Operation Manual . . . . . . . . . . . . . . . . 1-6
	GPIB Programming Manual . . . . . . . . . . . 1-6
	SCPI Programming Manual . . . . . . . . . . . 1-6
1-7	OPTIONS . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-8	LEVEL OF MAINTENANCE . . . . . . . . . . . . . 1-8
	Troubleshooting		. . . . . . . . . . . . . . . .	. 1-8
	Repair . . .	. .	. . . . . . . . . . . . . . . .	. 1-8
	Calibration	. . . . . . . . . . . . . . . . . . . 1-8
	Preventive Maintenance . . . . . . . . . . . . . 1-8
1-9	PREVENTIVE MAINTENANCE . . . . . . . . . . . 1-9
1-10	STATIC-SENSITIVE COMPONENT HANDLING
	PRECAUTIONS . . . . . . . . . . . . . . . . . . . 1-9
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	682XXB/683XXB MAJOR SUBSYSTEMS . . . . . . 2-3
	Digital Control. . . . . . . . . . . . . . . . . . 2-3
	Front Panel . . . . . . . . . . . . . . . . . . . 2-4
	Frequency Synthesis . . . . . . . . . . . . . . . 2-4
	Analog Instruction . . . . . . . . . . . . . . . . 2-5
	YIG Driver . . . .	. . . . . .	. . . . . . . . . 2-5
	Function Generator	. . . . . .	. . . . . . . . . 2-5

682XXB/683XXB MM

i

Table of Contents (Continued)

	ALC/AM/Pulse 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 0.01 to 65 GHz . . . . . . . . . . .	2-13
	Frequency Modulation . . . . . . . . . . . . . 2-14
	Phase Modulation (Option 6) . . . . . . . . . . 2-14
	Analog Sweep Mode (683XXB only) . . . . . . .	2-14
	Step Sweep Mode. . . . . . . . . . . . . . . .	2-15
2-4	ALC/AM/PULSE MODULATION . . . . . . . . . .	2-15
	ALC Loop Operation . . . . . . . . . . . . . . 2-15
	Pulse Generator Operation . . . . . . . . . . .	2-18
2-5	RF DECK ASSEMBLIES . . . . . . . . . . . . . .	2-19
	RF Deck Configurations . . . . . . . . . . . .	2-20
	YIG-tuned Oscillator . . . . . . . . . . . . . . 2-20
	Power Level Control and Modulation . . . . . .	2-23
	RF Signal Filtering . . . . . . . . . . . . . . . 2-23
	0.01 to 2 GHz Down Converter . . . . . . . . .	2-24
	0.5 to 2.2 GHz Digital Down Converter . . . . .	2-25
	Switched Doubler Module. . . . . . . . . . . . 2-26
	Source Quadrupler Module . . . . . . . . . . . 2-29
	Power Level Detection/ALC Loop . . . . . . . . 2-30
	Step Attenuator . . . . . . . . . . . . . . . .	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	682XXB/683XXB POWER LEVELS . . . . . . . . . 3-6
3-6	INTERNAL TIME BASE AGING RATE TEST . . . 3-8
	Test Setup . . . . . . . . . . . . . . . . . . . . 3-8
	Test Procedure. . . . . . . . . . . . . . . . . . 3-9

ii	682XXB/683XXB MM

Table of Contents (Continued)

3-7	FREQUENCY SYNTHESIS TESTS . . . . . . . . 3-11
	Test Setup . . . . . . . . . . . . . . . . . . . 3-11
	Coarse Loop/YIG Loop Test Procedure. . . . . .	3-12
	Fine Loop Test Procedure . . . . . . . . . . . . 3-13
3-8	SPURIOUS SIGNALS TEST: RF OUTPUT SIGNALS
	2 GHz ( 2.2 GHz for 68XX5B MODELS). . . . .	3-14
	Test Setup . . . . . . . . . . . . . . . . . . . 3-14
	0.01 - 2 GHz Test Procedure . . . . . . . . . .	3-14
	0.5 - 2.2 GHz Test Procedure . . . . . . . . . . 3-17
3-9	HARMONIC TEST: RF OUTPUT SIGNALS
	FROM 2 TO 20 GHz . . . . . . . . . . . . . . . .	3-18
	Test Setup . . . . . . . . . . . . . . . . . . . 3-18
	Test Procedure (2 to 10 GHz) . . . . . . . . . .	3-19
	Test Procedure (11 to 20 GHz) . . . . . . . . .	3-20
3-10	SINGLE SIDEBAND PHASE NOISE TEST . . . . 3-22
	Test Setup . . . . . . . . . . . . . . . . . . . 3-22
	Test Procedure . . . . . . . . . . . . . . . . . 3-23
3-11	POWER LEVEL ACCURACY AND FLATNESS
	TESTS. . . . . . . . . . . . . . . . . . . . . . . .	3-26
	Test Setup . . . . . . . . . . . . . . . . . . . 3-26
	Power Level Accuracy Test Procedure . . . . . .	3-27
	Power Level Flatness Test Procedure . . . . . .	3-27
3-12	AMPLITUDE MODULATION TEST . . . . . . . . 3-30
	Test Setup . . . . . . . . . . . . . . . . . . . 3-30
	AM Input Sensitivity Procedure. . . . . . . . .	3-31
3-13	FREQUENCY MODULATION TESTS . . . . . . . 3-33
	Test Setup . . . . . . . . . . . . . . . . . . . 3-33
	FM Input Sensitivity Procedure. . . . . . . . . 3-33
3-14	PULSE MODULATION TESTS: RISE TIME,
	FALL TIME, OVERSHOOT, AND LEVEL . . . . 3-39
	Test Setup . . . . . . . . . . . . . . . . . . . 3-39
	Rise/Fall Time and Overshoot. . . . . . . . . . 3-40
	Pulse Leveling Accuracy . . . . . . . . . . . .	3-41
3-15	PULSE MODULATION TEST: VIDEO
	FEEDTHROUGH. . . . . . . . . . . . . . . . . .	3-43
	Test Setup . . . . . . . . . . . . . . . . . . . 3-43
	Test Procedure . . . . . . . . . . . . . . . . .	3-44

682XXB/683XXB MM

iii

Table of Contents (Continued)

3-16 PULSE MODULATION TEST: RF ON/OFF RATIO 3-45 Test Setup . . . . . . . . . . . . . . . . . . . 3-45 Test Procedure . . . . . . . . . . . . . . . . . 3-45

3-17 PHASE MODULATION TESTS. . . . . . . . . . . 3-48 Test Setup . . . . . . . . . . . . . . . . . . . 3-48M Input Sensitivity Procedure. . . . . . . . . 3-48

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
4-6	INITIAL SETUP. . . . . . . . . . . . . . . . . . . . 4-7
	Interconnection . . . . . . . . . . . . . . . . . 4-7
	PC Setup — Windows 3.1 . . . . . . . . . . . .	4-8
	PC Setup — Windows 95 . . . . . . . . . . . .	4-10
4-7	PRELIMINARY CALIBRATION . . . . . . . . . .	4-13
	Equipment Setup . . . . . . . . . . . . . . . . 4-13
	Calibration Steps . . . . . . . . . . . . . . . .	4-14
4-8	SWITCHED FILTER SHAPER CALIBRATION . . 4-17
	Equipment Setup . . . . . . . . . . . . . . . . 4-17
	Log Amplifier Zero Calibration . . . . . . . . . 4-18
	Limiter DAC Adjustment . . . . . . . . . . . . 4-18
	Shaper DAC Adjustment . . . . . . . . . . . .	4-19
4-9	RF LEVEL CALIBRATION . . . . . . . . . . . . . 4-22
4-10	ALC SLOPE CALIBRATION . . . . . . . . . . . .	4-23
	Equipment Setup . . . . . . . . . . . . . . . . 4-23
	ALC Slope DAC Adjustment . . . . . . . . . .	4-24
4-11	ALC BANDWIDTH CALIBRATION . . . . . . . . 4-31
	Equipment Setup . . . . . . . . . . . . . . . . 4-31
	Bandwidth Calibration . . . . . . . . . . . . .	4-31

iv	682XXB/683XXB MM

Table of Contents (Continued)

4-12 AM CALIBRATION . . . . . . . . . . . . . . . . . 4-33 Equipment Setup . . . . . . . . . . . . . . . . 4-33 AM Calibration Procedure . . . . . . . . . . . 4-34

4-13 FM CALIBRATION . . . . . . . . . . . . . . . . . 4-37

Equipment Setup . . . . .	. .	.	. . . . . .	. .	4-37
FM Calibration Procedure	. .	.	. . . . . .	. .	4-38

4-14 PHASE MODULATION ( M) CALIBRATION. . . 4-51 Equipment Setup . . . . . . . . . . . . . . . . 4-51M Calibration Procedure . . . . . . . . . . . 4-52

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
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, A4, A5,

OR A6 PCB . . . . . . . . . . . . . . . . . . . . . . 6-8 Preliminary . . . . . . . . . . . . . . . . . . . 6-8 Procedure . . . . . . . . . . . . . . . . . . . . 6-8

682XXB/683XXB MM

v

Table of Contents (Continued)

6-5	REMOVING AND REPLACING THE A7 PCB. . . 6-10
	Preliminary . . . . . . . . . . . . . . . . . .	6-10
	Procedure . . . . . . . . . . . . . . . . . . .	6-10
6-6	REMOVING AND REPLACING THE A8, A9, A10,
	A11, OR A12 PCB. . . . . . . . . . . . . . . . . .	6-10
	Preliminary . . . . . . . . . . . . . . . . . .	6-10
	Procedure . . . . . . . . . . . . . . . . . . .	6-10
6-7	REMOVING AND REPLACING THE A13, A14,
	OR A15 PCB . . . . . . . . . . . . . . . . . . . .	6-11
	Preliminary. . . . . . . . . . . . . . . . . . . 6-11
	Procedure . . . . . . . . . . . . . . . . . . .	6-11
6-8	REMOVING AND REPLACING THE A16
	OR A17 PCB . . . . . . . . . . . . . . . . . . . .	6-11
	Preliminary. . . . . . . . . . . . . . . . . . . 6-11
	Procedure . . . . . . . . . . . . . . . . . . .	6-11
6-9	REMOVING AND REPLACING THE A18
	OR A19 PCB . . . . . . . . . . . . . . . . . . . .	6-12
	Preliminary . . . . . . . . . . . . . . . . . .	6-12
	Procedure . . . . . . . . . . . . . . . . . . .	6-12
6-10	REMOVING AND REPLACING THE REAR
	PANEL ASSEMBLY . . . . . . . . . . . . . . . .	6-13
	Preliminary . . . . . . . . . . . . . . . . . .	6-13
	Procedure . . . . . . . . . . . . . . . . . . .	6-13
6-11	REMOVING AND REPLACING THE A21 PCB . . 6-16
	Preliminary . . . . . . . . . . . . . . . . . .	6-16
	Procedure . . . . . . . . . . . . . . . . . . .	6-16
6-12	REMOVING AND REPLACING THE A21-1 PCB . 6-17
	Preliminary . . . . . . . . . . . . . . . . . .	6-17
	Procedure . . . . . . . . . . . . . . . . . . .	6-17
6-13	REMOVING AND REPLACING THE FAN
	ASSEMBLY . . . . . . . . . . . . . . . . . . . . .	6-18
	Preliminary . . . . . . . . . . . . . . . . . .	6-18
	Procedure . . . . . . . . . . . . . . . . . . .	6-18

Appendix A - Test Records

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

vi	682XXB/683XXB 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 . . . . . . . . . . . . . . . 1-6
1-6	RELATED MANUALS . . . . . . . . . . . . . . . . 1-6
	Operation Manual . . . . . . . . . . . . . . . . 1-6
	GPIB Programming Manual . . . . . . . . . . . 1-6
	SCPI Programming Manual . . . . . . . . . . . 1-6
1-7	OPTIONS . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-8	LEVEL OF MAINTENANCE . . . . . . . . . . . . . 1-8
	Troubleshooting		. . . . . . . . . . . . . . . .	. 1-8
	Repair . . .	. .	. . . . . . . . . . . . . . . .	. 1-8
	Calibration	. . . . . . . . . . . . . . . . . . . 1-8
	Preventive Maintenance . . . . . . . . . . . . . 1-8
1-9	PREVENTIVE MAINTENANCE . . . . . . . . . . . 1-9
1-10	STATIC-SENSITIVE COMPONENT HANDLING
	PRECAUTIONS . . . . . . . . . . . . . . . . . . . 1-9
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 1-15

Figure 1-1. Typical Series 682XXB/683XXB Synthesized Signal Generator (Model 68369B Shown)

Chapter 1

General Information

1-1

1-2

SCOPE OF MANUAL	This manual provides service information for all models of the Series
	682XXB/683XXB Synthesized Signal Generators. The service informa-
	tion includes replaceable parts information, functional circuit descrip-
	tions, block diagrams, performance verification tests, and procedures
	for calibration, troubleshooting, and assembly/subassembly removal
	and replacement. (Throughout this manual, the terms 682XXB/
	683XXB and signal generator will be used interchangeably to refer to
	the instrument.) Manual organization is shown in the table of con-
	tents.
	NOTE
	Service information for the series 682XXB signal generators
	and series 683XXB 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 682XXB/
	683XXB Synthesized Signal Generators, identification numbers,
	related manuals, and options. Information is included concerning level
	of maintenance, replaceable subassemblies and RF components,
	exchange 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 682XXB Synthesized Signal Generator and the Series
	683XXB Synthesized Signal Generator are microprocessor-based,
	synthesized 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 signal generators are fully controllable
	locally from the front panel or remotely (except for power on/standby)
	via the IEEE-488 General Purpose Interface Bus (GPIB).
	The Series 682XXB Synthesized Signal Generator and the Series
	683XXB Synthesized Signal Generator each presently consists of 15
	models covering a variety of frequency ranges and power levels. Table
	1-1, pages 1-4 and 1-5, lists models, frequency ranges, and maximum
	leveled output.

682XXB/683XXB MM

1-3

GENERAL	682XXB/683XXB
INFORMATION	MODELS

Table 1-1. Series 682XXB/683XXB Models (1 of 2)

	68XXXB	Frequency		Output Power	Output Power
	Model		(GHz)		w/Step Attenuator
	68X37B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm
	68X45B	0.5 – 20.0 GHz		+13.0 dBm	+11.0 dBm
	68X47B	0.01	– 20.0 GHz	+13.0 dBm	+11.0 dBm
	68X53B	2.0 – 20.0 GHz		+9.0 dBm	+7.0 dBm
		20.0	– 26.5 GHz	+6.0 dBm	+3.5 dBm
		0.5	– 2.2 GHz	+13.0 dBm	+11.0 dBm
	68X55B	2.2 – 20.0 GHz		+9.0 dBm	+7.0 dBm
		20.0	– 26.5 GHz	+6.0 dBm	+3.5 dBm
		0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
	68X59B	2.0 – 20.0 GHz		+9.0 dBm	+7.0 dBm
		20.0	– 26.5 GHz	+6.0 dBm	+3.5 dBm
	68X63B	2.0 – 20.0 GHz		+9.0 dBm	+7.0 dBm
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
		0.5	– 2.2 GHz	+13.0 dBm	+11.0 dBm
	68X65B	2.2 – 20.0 GHz		+9.0 dBm	+7.0 dBm
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
		0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
	68X69B	2.0 – 20.0 GHz		+9.0 dBm	+7.0 dBm
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
		0.5	– 2.2 GHz	+11.0 dBm	+10.0 dBm
	68X75B	2.2 – 20.0 GHz		+10.0 dBm	+8.5 dBm
		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
	68X77B	2.0 – 20.0 GHz		+10.0 dBm	+8.5 dBm
		20.0	– 40.0 GHz	+2.5 dBm	0.0 dBm
		40.0	– 50.0 GHz	+2.5 dBm	–1.0 dBm
		0.5	– 2.2 GHz	+11.0 dBm	+10.0 dBm
		2.2 – 20.0 GHz		+10.0 dBm	+8.5 dBm
	68X85B	20.0	– 40.0 GHz	+2.5 dBm	0.0 dBm
		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	+10.0 dBm
		2.0 – 20.0 GHz		+10.0 dBm	+8.5 dBm
	68X87B	20.0	– 40.0 GHz	+2.5 dBm	0.0 dBm
		40.0	– 50.0 GHz	+2.0 dBm	–1.5 dBm
		50.0	– 60.0 GHz	+2.0 dBm	–2.0 dBm
		0.5	– 2.2 GHz	+11.0 dBm
		2.2 – 20.0 GHz		+10.0 dBm
	68X95B	20.0	– 40.0 GHz	+2.5 dBm	Not Available
		40.0	– 50.0 GHz	0.0 dBm
		50.0	– 65.0 GHz	–2.0 dBm

1-4	682XXB/683XXB MM

GENERAL	IDENTIFICATION
INFORMATION	NUMBER

Table 1-1. Series 682XXB/683XXB Models (2 of 2)

	68XXXB	Frequency		Output Power	Output Power
	Model		(GHz)		w/Step Attenuator
		0.01 – 2.0 GHz		+12.0 dBm
		2.0 – 20.0 GHz		+10.0 dBm
	68X97B	20.0	– 40.0 GHz	+2.5 dBm	Not Available
		40.0	– 50.0 GHz	0.0 dBm
		50.0	– 65.0 GHz	–2.0 dBm
		With Option 15B (High Power) Installed
	68X37B	2.0 – 20.0 GHz		+17.0 dBm	+15.0 dBm
	68X45B	0.5	– 2.2 GHz	+13.0 dBm	+11.0 dBm
		2.2 – 20.0 GHz		+17.0 dBm	+15.0 dBm
	68X47B	0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
		2.0 – 20.0 GHz		+17.0 dBm	+15.0 dBm
	68X53B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm
		20.0	– 26.5 GHz	+10.0 dBm	+7.5 dBm
		0.5	– 2.2 GHz	+13.0 dBm	+11.0 dBm
	68X55B	2.2 – 20.0 GHz		+13.0 dBm	+11.0 dBm
		20.0	– 26.5 GHz	+10.0 dBm	+7.5 dBm
		0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
	68X59B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm
		20.0	– 26.5 GHz	+10.0 dBm	+7.5 dBm
	68X63B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
		0.5	– 2.2 GHz	+13.0 dBm	+11.0 dBm
	68X65B	2.2 – 20.0 GHz		+13.0 dBm	+11.0 dBm
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
		0.01 – 2.0 GHz		+13.0 dBm	+11.0 dBm
	68X69B	2.0 – 20.0 GHz		+13.0 dBm	+11.0 dBm
		20.0	– 40.0 GHz	+6.0 dBm	+3.0 dBm
	68X75B	0.5 – 50.0 GHz		Standard	Standard
	68X77B	0.01	– 50.0 GHz	Standard	Standard
	68X85B	0.5 – 60.0 GHz		Standard	Standard
	68X87B	0.01	– 60.0 GHz	Standard	Standard
	68X95B	0.5 - 65.0 GHz		Standard	Not Available
	68X97B	0.01	– 65.0 GHz	Standard	Not Available

1-4 IDENTIFICATION	All ANRITSU instruments are assigned a unique six-digit ID number,
NUMBER	such as “403002.” The ID number is imprinted on a decal that is af-
	fixed to the rear panel of the unit. Special-order instrument configura-
	tions also have an additional special serial number tag attached to the
	rear panel of the unit.

682XXB/683XXB MM

1-5

GENERAL	ELECTRONIC
INFORMATION	MANUAL

		When ordering parts or corresponding with ANRITSU Customer Serv-
		ice, please use the correct serial number with reference to the specific
		instrument’s model number (i.e., Model 68347B Synthesized Signal
		Generator, Serial No. 403002).
1-5	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 availability.
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 information and instructions
		Manual	for operation of the series 682XXB/683XXB signal
			generators using the front panel controls. It also in-
			cludes general information, performance specifica-
			tions, installation instructions, and operation
			verification procedures. The ANRITSU part number
			for the Operation Manual is 10370-10284.
		GPIB	This manual provides information for remote opera-
		Programming	tion of the series 682XXB/683XXB signal generators
		Manual	using Product Specific commands sent from an ex-
			ternal controller via the IEEE 488 General Purpose
			Interface Bus (GPIB). It contains a complete listing
			and description of all 682XXB/683XXB GPIB Prod-
			uct Specific commands and several programming
			examples. The ANRITSU part number for the GPIB
			Programming Manual is 10370-10286.
		SCPI	This manual provides information for remote opera-
		Programming	tion of the series 682XXB/683XXB signal generators
		Manual	using Standard Commands for Programmable In-
			struments (SCPI) commands sent from an external
			controller via the IEEE 488 General Purpose Inter-
			face Bus (GPIB). It contains a complete listing and

description of each command in the 682XXB/ 683XXB SCPI command set and examples of command usage. The ANRITSU part number for the SCPI Programming Manual is 10370-10288.

1-6	682XXB/683XXB MM

GENERAL	OPTIONS
INFORMATION

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 26.5 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 6, Phase Modulation ( M). Adds phase modulation capability. The internal FM generator becomes the FM/ M generator. (Not available in combination with Option 7.)

qOption 7, Delete AM/FM Generator. Deletes the internal AM and FM generators. External AM and FM capability remains unchanged. (Not available in combination with Option 8 or Option 20.)

qOption 8, Internal Power Meter. Adds an internal power meter that is compatible with ANRITSU 560-7, 5400-71, or 640071 series detectors. (Not available in combination with Option 7.)

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.

qOption 14, ANRITSU 360B VNA Compatibility. Modifies rack mounting hardware to mate unit in a ANRITSU 360B VNA console.

qOption 15B, High Power Output. Adds high-power RF components to the instrument providing increased RF output power in the 2–26.5 GHz frequency range. Option 15B 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.

682XXB/683XXB MM

1-7

GENERAL	LEVEL OF
INFORMATION	MAINTENANCE

q Option 17A, No Front Panel. Deletes the front panel for use in remote control applications where a front panel display or keyboard control are not needed.

	q Option 18, mmWave Module Bias Output. Provides bias out-
	put for 54000-xWRxx Millimeter Wave Source Modules. BNC
	Twinax connector, rear panel.
	q Option 19, SCPI Programmability. Adds GPIB command
	mnemonics complying with Standard Commands for Program-
	mable Instruments (SCPI), Version 1993. SCPI programming
	complies with IEEE 488.2-1987.
	q Option 20, SCAN Modulator. Adds an internal SCAN modula-
	tor for simulating high-depth amplitude modulated signals in
	models 68237B/68337B, 68245B/68345B, and 68247B/68347B
	only. Requires an external modulating signal. (Not available in
	combination with Option 7.)
1-8 LEVEL OF	Maintenance of the 682XXB/683XXB consists of:
MAINTENANCE	q Troubleshooting the instrument to a replaceable subassembly or
	RF component.
	q Repair by replacing the failed subassembly or RF component.
	q Calibration.
	q Preventive maintenance.
	Troubleshoot-	The 682XXB/683XXB firmware includes internal
	ing	diagnostics that self-test most of the internal assem-
		blies of the instrument. When the signal generator
		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 lists and describes the self-test error messages
		and provides procedures for isolating 682XXB/
		683XXB failures to a replaceable subassembly or RF
		component.
	Repair	Most instrument failures are field repairable by re-
		placing the failed subassembly or RF component.
		Detailed instructions for removing and replacing
		failed subassemblies and components are provided
		in Chapter 6.
	Calibration	The signal generator may require calibration after
		repair. Refer to Chapter 4 for a listing of calibration
		requirements and calibration procedures.
	Preventive	Preventive maintenance on the 682XXB/683XXB
	Maintenance	consists of cleaning the fan honeycomb filter, de-
		scribed in paragraph 1-8.

1-8	682XXB/683XXB MM

GENERAL	PREVENTIVE
INFORMATION	MAINTENANCE

1-9 PREVENTIVE	The 682XXB/683XXB 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 1-2).
	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 1-2. Removing/Replacing the Fan Filter Guard
1-10 STATIC-SENSITIVE	The 682XXB/683XXB contains components that can be damaged by
COMPONENT	static electricity. Figure 1-3 illustrates the precautions that should be
HANDLING	followed when handling static-sensitive subassemblies and compo-
PRECAUTIONS	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 replac-
	ing subassemblies or components is strongly recommended.

682XXB/683XXB MM

1-9

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.

2. Do 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 1-3. Static-Sensitive Component Handling Precautions

1-10	682XXB/683XXB MM

GENERAL	START UP
INFORMATION	CONFIGURATION

1-11 STARTUP	The 682XXB/683XXB 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 signal generator
	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 682XXB/683XXB.
		(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 signal genera-
		tor to line power. The instrument should come up in
		standby mode.

Figure 1-4. Startup Configuration of Connector J12

682XXB/683XXB 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 3)

	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
	Spectrum Analyzer	Frequency Range: 20 Hz to 40 MHz	Hewlett-Packard, Model 3585B	P
		Resolution Bandwidth: 3 Hz
	Frequency Counter	Frequency Range: 0.01 to 65 GHz	EIP Microwave, Inc. Models 538B, 548B,	C, P
	with	Input Impedance: 50W	or 578B, with
	Cable Kit	Resolution: 1 Hz	Cable Kit: Option 590
	and	Other: External Time Base Input	and
	External Mixer		External Mixer:
			Option 91 (26.5 to 40 GHz)
			Option 92 (40 to 60 GHz)
			Option 93 (60 to 90 GHz)
	Power Meter,	Power Range: –30 to +20 dBm	Hewlett-Packard Model 437B, with	C, P
	with Power Sensor	(1mW to 100mW)	Power Sensor:
			HP 8487A (0.01 to 50 GHz)
	Power Meter,	Power Range: –30 to +20 dBm	ANRITSU ML4803A, with	C, P
	with Power Sensor	(1mW to 100mW)	Power Sensor:
			MP716A4 (50 to 75 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 10-12 parts/day
	Frequency Standard	Frequency: 10 MHz	Spectracom Corp., Model 8161	C
		Accuracy: 1 ´ 10–10 parts/day
	Function Generator	Output Voltage: 2 volts peak-to-peak	Hewlett-Packard, Model 8116A	C
		Functions: 0.1 Hz to 100 kHz sine and
		square waveforms
	Function Generator	Output Voltage: 2 volts peak-to-peak	Hewlett-Packard, Model 33120A	C
		Functions: 0.1 Hz to 100 kHz sine and
		square waveforms

1-12	682XXB/683XXB MM

GENERAL	RECOMMENDED
INFORMATION	TEST EQUIPMENT

Table 1-2. Recommended Test Equipment (2 of 3)

	INSTRUMENT	CRITICAL	RECOMMENDED	USAGE (1)
		SPECIFICATION	MANUFACTURER/MODEL
	Modulation Analyzer	Frequency Input: 10 MHz	Hewlett-Packard, Model 8901A	P
		(or 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
	Oscilloscope	Bandwidth: DC to 150 MHz	Tektronix, Inc. Model TAS485	P, T
		Vertical Sensitivity: 2mV/division
		Horizontal Sensitivity: 50 ns/division
	Mixer	Frequency Range: 1 to 26 GHz	Macom Micro Electronics Div.	P
			Model DMS1-26A
	Scalar Network	Frequency Range: 0.01 to 50 GHz	ANRITSU, Model 562, 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)
	Adapter	K (male) to 2.4 mm (female)	Hewlett-Packard	C, P
		Adapts the Power Sensor, HP 8487A, to	Part Number: HP 11904D
		the 682XXB/683XXB RF OUTPUT con-
		nector (£40 GHz models)
	Adapter	Adapts the MP716A4 Power Sensor to	ANRITSU MA4002B	C, P
		the ML4803A Power Meter
	Adapter	WR15 to V (male)	ANRITSU, Model 35WR15V	C, P
		Adapts the MP716A4 Power Sensor to
		the 682XXB/683XXB RF OUTPUT
		connector (>40 GHz models)
	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)

682XXB/683XXB MM

1-13

GENERAL	EXCHANGE
INFORMATION	ASSEMBLY PROGRAM

Table 1-2. Recommended Test Equipment (3 of 3)

	INSTRUMENT	CRITICAL	RECOMMENDED	USAGE (1)
		SPECIFICATION	MANUFACTURER/MODEL
	Microwave (Pulse)	Output Polarity: Negative	ANRITSU, Model SC3800	P
	Detector	Frequency Range: 0.01 to 40 GHz	(K input/BNC output connectors)
	High Pass Filter	150 MHz High-Pass Filter (DC Block)	Narda, Model 4564	P
	Low Pass Filter	450 MHz Low-Pass Filter	Mini-Circuits, Model SLP-450	P
	Personal Computer	PC Configuration: IBM AT or compatible	Any common source	C
		Operating System: Windows 3.1
		Accessories: Mouse
	Serial Interface Assy	Provides serial interface between the PC	ANRITSU P/N: T1678	C
		and the 682XXB/683XXB.
	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)

1-13

1-14

EXCHANGE	ANRITSU maintains an exchange assembly program for selected
ASSEMBLY PROGRAM	682XXB/683XXB subassemblies and RF components. If a malfunction
	occurs in one of these subassemblies, the defective unit can be ex-
	changed. Upon receiving your request, ANRITSU will ship the ex-
	change 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 lists those replaceable subassemblies and RF components of
SUBASSEMBLIES	the 682XXB/683XXB that are presently covered by the ANRITSU ex-
AND PARTS	change assembly program. Table 1-4, on page 1-16, lists common re-
	placeable parts for the 682XXB/683XXB that are not presently 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	682XXB/683XXB 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 683XXB		ND40832
	Front Panel Assy 682XXB		ND40833
	A3 Reference Loop PCB Assy		D37436-3
	A4 Coarse Loop PCB Assy		D40604-3
	A4 Coarse Loop PCB Assy		D40634-3
	A5 Fine Loop PCB Assy		D37452-3
	A5 Fine Loop PCB Assy		D40605-3
	A5	Fine Loop PCB Assy (w/Option 11)	ND39917
	A5 Fine Loop PCB Assy		D40635-3
	A5	Fine Loop PCB Assy (w/Option 11)	D40635-7
	A6	Pulse Generator PCB Assy	D40606-3
	A6	Pulse Generator PCB Assy	D40626-3
	A7 YIG Loop PCB Assy		D40607-3
	A7 YIG Loop PCB Assy		D40637-3
	A8	Function Generator PCB Assy	D37408-3
	A8	Function Generator PCB Assy	D40608-3
	A9	PIN Control PCB Assy	D40609-3
	A9	PIN Control PCB Assy	D40629-3
	A9	PIN Control PCB Assy	D40639-3
	A10 ALC PCB Assy		D40610-3
	A11 FM PCB Assy		D40611-3
	A11 FM PCB Assy		D40641-3
	A11 FM PCB Assy (w/Option 6)		D40641-4
	A12 Analog Instruction PCB Assy		D37448-3
	A12 Analog Instruction PCB Assy (682XXB)		D40612-3
	A13 YIG Driver PCB Assy		D40613-3
	A14 SDM Driver PCB Assy, 26.5 GHz		D40614-4
	A14 SDM, SQM Driver PCB Assy		D40614-3
	A15 Regulator PCB Assy		D40615-3
	A16 CPU Interface PCB Assy		D37416-3
	A17 CPU PCB Assy		D37444-3
	A18 Power Supply PCB Assy		D40618-3
	A19 Line Conditioner PCB Assy		D40619-3
	A21 Line Filter/Rectifier PCB Assy		ND39918
	A21-1 BNC/AUX I/O Connector PCB Assy		ND39919
	10 MHz Crystal Oscillator Assy		D37332

682XXB/683XXB 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
	YIG-Tuned Oscillator, 2 to 20 GHz	C27327
	Down Converter	D27330
	Pulsed Digital Down Converter	D27370
	Switched Doubler Module, 20 to 26.5 GHz	ND40843
	Switched Doubler Module, 20 to 40 GHz	D28535
	Source Quadrupler Module, 40 to 50 GHz	D28185
	Source Quadrupler Module, 40 to 60 GHz	60-141
	Source Quadrupler Module, 40 to 65 GHz	60-142
	Forward Coupler, 60 GHz and 65 GHz	C27184
	Coupler, 40 GHz	D27115
	Coupler, 60 GHz	D27350
	Pulsed Switched Filter	D25015
	Pulsed Switched Filter	D29391
	Pulsed Switched Filter (w/Option 15B)	D26350
	Pulsed Switched Filter (w/Option 15B)	D29392
	Output Connector Assy, K female	ND39077
	Output Connector Assy, V female	ND40835
	Step Attenuator, 110 dB, 26.5 GHz	D27152
	Step Attenuator, 110 dB, 40 GHz	D25080
	Step Attenuator, 90 dB, 50 GHz	D27315
	Step Attenuator, 90 dB, 60 GHz	D28957

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

SUBASSEMBLY OR PART NAME	ANRITSU PART NUMBER
Cap, Protective (for RF Output Connector)	A20304
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	682XXB/683XXB 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
	682XXB/683XXB 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
	682XXB/683XXB 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

682XXB/683XXB 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

ANRITSU ELECTRONICA LTDA. Praia de Botafogo, 440, Sala 2401

CEP22250-040, Rio de Janeiro, RJ, Brasil Telephone: [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]

ITALY	TAIWAN
ANRITSU Sp.A	ANRITSU CO., INC.
Roma Office	7F, No. 316, Section 1
Via E. Vittorini, 129	NeiHu Road
00144 Roma EUR	Taipei, Taiwan, R.O.C.
Telephone: [phone]	Telephone: [phone]
FAX: [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	682XXB/683XXB MM

Chapter 2

Functional Description

Table of Contents

2-1	INTRODUCTION . . . . . . . . . . . . . . . . . . . 2-3
2-2	682XXB/683XXB MAJOR SUBSYSTEMS . . . . . . 2-3
	Digital Control. . . . . . . . . . . . .	. . . . . 2-3
	Front Panel . . . . . . . . . . . . . .	. . . . . 2-4
	Frequency Synthesis . . . . . . . . . .	. . . . . 2-4
	Analog Instruction . . . . . . . . . . .	. . . . . 2-5
	YIG Driver . . . . . . . . . . . . . .	. . . . . 2-5
	Function Generator . . . . . . . . . .	. . . . . 2-5
	ALC/AM/Pulse 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 0.01 to 65 GHz . . . . . . . . . . .		2-13
	Frequency Modulation . . . . . . . . . . . . . 2-14
	Phase Modulation (Option 6) . . . . . . . . . . 2-14
	Analog Sweep Mode (683XXB only) . . . . . . .		2-14
	Step Sweep Mode. . . . . . . . . . . . . . . .		2-15
2-4	ALC/AM/PULSE MODULATION . . . . . . . . . .		2-15
	ALC Loop Operation . . . . . . . . . . . . . . 2-15
	Pulse Generator Operation . . . . . . . . . . .		2-18
2-5	RF DECK ASSEMBLIES . . . . . . . . . . . . . .		2-19
	RF Deck Configurations . . . . . . . .	. . . . 2-20
	YIG-tuned Oscillator . . . . . . . . . . . . . . 2-20
	Power Level Control and Modulation . . . . . .		2-23
	RF Signal Filtering . . . . . . . . . . . . . . . 2-23

Table of Contents (Continued)

0.01 to 2 GHz Down Converter . . . . . . . . . 2-24 0.5 to 2.2 GHz Digital Down Converter . . . . . 2-25 Switched Doubler Module. . . . . . . . . . . . 2-26 Source Quadrupler Module . . . . . . . . . . . 2-29

Power Level Detection/ALC Loop .	. . .	.	. . .	2-30
Step Attenuator . . . . . . . . .	. . .	.	. . .	2-31