Anritsu MG3692A User manual

SERIES
MG3692A, MG3693A, MG3694A
SYNTHESIZED CW GENERATORS
MAINTENANCE MANUAL
P/N: 10370-10355
REVISION: A
PRINTED: FEBRUARY 2002
COPYRIGHT 2002 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 three years 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 consequen-
tial 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 ACKNOWLEDGMENTS
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 computer 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 writ-
ten 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 Online Manual.....................1-5
1-6 Related Manuals ...................1-5
Operation Manual ................1-5
GPIB Programming Manual ...........1-5
1-7 Options.........................1-5
1-8 Level of Maintenance .................1-6
Troubleshooting .................1-6
Repair......................1-6
Calibration ...................1-6
Preventive Maintenance .............1-6
1-9 Component Handling .................1-6
1-10 Preventive Maintenance ...............1-8
1-11 Startup Configurations ................1-9
1-12 Recommended Test Equipment ...........1-10
Chapter 2 Functional Description
2-1 Introduction ......................2-3
2-2 Major Subsystems...................2-3
Digital Control..................2-3
Front Panel Assembly ..............2-4
Frequency Synthesis...............2-4
A9 YIG Assembly ................2-5
ALC.......................2-5
RF Deck.....................2-5
Power Supply ..................2-5
Inputs/Outputs .................2-6
Motherboard/Interconnections ..........2-6
2-3 Frequency Synthesis .................2-9
Phase Lock Loops ................2-9
MG369XA MM i

Overall Operation ...............2-10
RF Outputs 0.01 MHz to 40 GHz ........2-14
Step Sweep Mode................2-15
2-4 ALC and Leveling ..................2-15
ALC Loop Operation ..............2-15
2-5 RF Deck Assemblies .................2-17
RF Deck Configurations ............2-17
YIG-tuned Oscillator ..............2-17
RF Signal Filtering...............2-18
0.01 to 2 GHz Down Converter .........2-18
0.01 to 2.2 GHz Digital Down Converter
(Option 4) ...................2-19
Switched Doubler Module............2-19
Step Attenuators ................2-20
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 Notation .............3-4
3-5 Power Levels......................3-5
3-6 Internal Time Base Aging Rate............3-6
Test Setup....................3-6
Test Procedure..................3-7
3-7 Frequency Synthesis Tests ..............3-9
Test Setup....................3-9
Coarse Loop/ YIG Loop Test Procedure ......3-9
Fine Loop Test Procedure ............3-10
3-8 Spurious Signals Test £2GHz............3-11
Test Setup ...................3-11
Test Procedure .................3-11
0.01 - 2.2 GHz (Option 4) Test Procedure ....3-14
3-9 Harmonics Test 2 to 20 GHz.............3-15
Test Setup ...................3-15
Test Procedure .................3-16
3-10 Single Sideband Phase Noise ............3-17
ii MG369XA MM
Table of Contents (Continued)

Test Setup ...................3-18
Test Procedure .................3-19
3-11 Power Accuracy and Flatness ............3-22
Test Setup ...................3-22
Power Level Accuracy Test Procedure ......3-23
Power Level Flatness Test Procedure ......3-24
Chapter 4 Calibration
4-1 Introduction ......................4-3
4-2 Recommended Test Equipment............4-3
4-3 Test Records ......................4-3
4-4 Subassembly Replacement ..............4-4
4-5 Connector and Key Notation .............4-4
4-6 Initial Setup ......................4-6
Interconnection .................4-6
PC Setup ....................4-7
4-7 Preliminary Calibration ...............4-10
Equipment Setup................4-10
Calibration Steps ................4-11
Alternate 10 MHz
Reference Oscillator Calibration ........4-14
4-8 Switched Filter Shaper ...............4-16
Equipment Setup................4-16
Log Amplifier Zero Calibration .........4-17
Limiter DAC Adjustment ............4-17
Shaper DAC Adjustment ............4-19
4-9 RF Level Calibration.................4-20
4-10 ALC Bandwidth Calibration.............4-21
Equipment Setup................4-21
Bandwidth Calibration .............4-21
Chapter 5 Troubleshooting
5-1 Introduction ......................5-3
5-2 Recommended Test Equipment............5-3
5-3 Error Messages ....................5-3
Self-Test Error Messages.............5-3
MG369XA MM iii
Table of Contents (Continued)

Normal Operation Error and
Warning/Status Messages ............5-7
5-4 No Error Message ...................5-9
5-5 Troubleshooting Tables ................5-9
Chapter 6 Removal and Replacement Procedures
6-1 Introduction ......................6-3
6-2 Exchange Assembly Program.............6-3
6-3 Chassis Covers.....................6-6
Preliminary ...................6-6
Procedure ....................6-6
6-4 Front Panel Assembly.................6-8
Preliminary ...................6-8
Procedure ....................6-8
6-5 A2 Microprocessor PCB Board ............6-9
Preliminary ...................6-9
Procedure ....................6-9
6-6 A3 Reference/Fine Loop PCB ............6-10
Preliminary ..................6-10
Procedure ...................6-10
6-7 A4 Coarse Loop PCB ................6-11
Preliminary...................6-11
Procedure ...................6-11
6-8 A5 – A9 PCB Removal ................6-13
Preliminary ..................6-13
Card Cage Cover ................6-13
A5 Auxiliary PCB ...............6-14
A6ALCPCB..................6-14
A7 YIG Lock PCB ...............6-15
A8DDSPCB..................6-15
A9 YIG Assembly................6-15
6-9 Power Supply Assembly ...............6-16
Preliminary ..................6-16
Power Supply Top Assembly ..........6-16
12 Volt Power Supply PCB ...........6-17
Power Supply Regulator PCB ..........6-17
iv MG369XA MM
Table of Contents (Continued)

6-10 Anritsu Customer Service Centers .........6-19
Appendix A Test Records
A-1 Introduction ......................A-1
Appendix B Performance Specifications
B-1 MG369XA Product Data Sheet ............B-1
MG369XA MM v/vi

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 Online Manual.....................1-5
1-6 Related Manuals ...................1-5
Operation Manual ................1-5
GPIB Programming Manual ...........1-5
1-7 Options.........................1-5
1-8 Level of Maintenance .................1-6
Troubleshooting .................1-6
Repair......................1-6
Calibration ...................1-6
Preventive Maintenance .............1-6
1-9 Component Handling .................1-6
1-10 Preventive Maintenance ...............1-8
1-11 Startup Configurations ................1-9
1-12 Recommended Test Equipment ...........1-10
Chapter 1
General Information

Figure 1-1. Typical Series MG3690A Synthesized CW/Signal Generator (Model MG3692A Shown)

Chapter 1
General Information
1-1 Scope of Manual This manual provides service information for the Model MG3692A,
MG3693A, and MG3694A CW Signal Generators. The service informa-
tion includes replaceable parts information, troubleshooting, perfor-
mance verification tests, calibration procedures, functional circuit de-
scriptions and block diagrams, and assembly/subassembly removal
and replacement. Throughout this manual, the term MG369XA is used
to refer to the instrument. Manual organization is shown in the table
of contents.
1-2 Introduction This chapter provides a general description of the MG369XA identifi-
cation numbers, related manuals, and options. Information is included
concerning level of maintenance, replaceable subassemblies and RF
components, exchange assembly program, and preventive mainte-
nance. Static-sensitive component handling precautions and lists of
exchangeable subassemblies and recommended test equipment are
also provided.
1-3 Description The Series MG369XA is a microprocessor-based, synthesized signal
source with high resolution phase-lock capability. It generates both
discrete CW frequencies and broad (full range) and narrow band step
sweeps across the frequency range of 2 GHz to 40 GHz. Options are
available to extend the low end of the frequency range to 0.1 Hz. All
functions of the CW generator are fully controllable locally from the
front panel or remotely (except for power on/standby) via the
IEEE-488 General Purpose Interface Bus (GPIB). Table 1-1 on
page 1-4 lists models, frequency ranges, and maximum leveled output
power.
MG369XA MM 1-3

Description General Information
1-4 MG369XA MM
Model
Number Configuration Frequency
Range Max Leveled Output Power
Max Leveled
Output Power
w/Step Attenuator
Max Leveled
Output Power
w/Electronic
Step Attenuator
MG3692A
Option 22
Option 4
Option 5
Standard
Standard
³0.1 Hz – £10 MHz
³0.01 – £2.2 GHz
³0.01 – £2.0 GHz
³2.0 – £8.4 GHz
>8.4 – £20.0 GHz
+13.0 dBm
+17.0 dBm
+17.0 dBm
+13.0 dBm
+13.0 dBm
+11.0 dBm
+15.0 dBm
+15.0 dBm
+11.0 dBm
+11.0 dBm
+9.0 dBm
+13.0 dBm
+13.0 dBm
+9.0 dBm
+3.0 dBm
MG3693A
Option 22
Option 4
Option 5
Standard
Standard
³0.1 Hz – £10 MHz
³0.01 – £2.2 GHz
³0.01 – £2.0 GHz
³2.0 – £20.0 GHz
>20.0 – £30.0 GHz
+13.0 dBm
+13.0 dBm
+13.0 dBm
+9.0 dBm
+6.0 dBm
+11.0 dBm
+11.0 dBm
+11.0 dBm
+7.0 dBm
+3.0 dBm
Not Available
MG3694A
Option 22
Option 4
Option 5
Standard
Standard
³0.1 Hz – £10 MHz
³0.01 – £2.2 GHz
³0.01 – £2.0 GHz
³2.0 – £20.0 GHz
>20.0 – £40.0 GHz
+13.0 dBm
+13.0 dBm
+13.0 dBm
+9.0 dBm
+6.0 dBm
+11.0 dBm
+11.0 dBm
+11.0 dBm
+7.0 dBm
+3.0 dBm
Not Available
With Option 15 (High Power) Installed
MG3692A
Option 22
Option 4
Option 5
Standard
Standard
³0.1 Hz – £10 MHz
³0.01 – £2.2 GHz
³0.01 – £2.0 GHz
³2.0 – £20.0 GHz
>20.0 – £40.0 GHz
+13.0 dBm
+19.0 dBm
+19.0 dBm
+19.0 dBm
+17.0 dBm
+13.0 dBm
+18.0 dBm
+18.0 dBm
+18.0 dBm
+15.0 dBm
+13.0 dBm
+15.0 dBm
+15.0 dBm
+13.0 dBm
+7.0 dBm
MG3693A
Option 22
Option 4
Option 5
Standard
Standard
Standard
³0.1 Hz – £10 MHz
³0.01 – £2.2 GHz
³0.01 – £2.0 GHz
³2.0 – £18.0 GHz
>18.0 – £20.0 GHz
>20.0 – £30.0 GHz
+13.0 dBm
+15.0 dBm
+15.0 dBm
+15.0 dBm
+12.0 dBm
+14.0 dBm
+13.0 dBm
+14.0 dBm
+14.0 dBm
+14.0 dBm
+10.0 dBm
+12.0 dBm
Not Available
MG3694A
Option 22
Option 4
Option 5
Standard
Standard
Standard
³0.1 Hz – £10 MHz
³0.01 – £2.2 GHz
³0.01 – £2.0 GHz
³2.0 – £18.0 GHz
>18.0 – £20.0 GHz
>20.0 – £40.0 GHz
+13.0 dBm
+15.0 dBm
+15.0 dBm
+15.0 dBm
+12.0 dBm
+14.0 dBm
+13.0 dBm
+14.0 dBm
+14.0 dBm
+14.0 dBm
+10.0 dBm
+12.0 dBm
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.
Table 1-1. Series MG369XA Models

1-4 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 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.
When ordering parts or corresponding with Anritsu Customer Service,
please use the correct serial number with reference to the specific in-
strument's model number (i.e., Model MG3692A CW Signal Generator,
Serial No. 875012).
1-5 Online 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 three manual set that consists of an Operation Man-
ual, a GPIB Programming Manual, and a Maintenance Manual.
Operation
Manual This manual provides instructions for operation of
the MG369XA using the front panel controls. It also
includes general information, performance specifica-
tions, installation instructions, and operation verifi-
cation procedures. The Anritsu part number for the
Model MG3692A, MG3693A, MG3694A Operation
Manual is 10370-10353.
GPIB
Programming
Manual
This manual provides information for remote opera-
tion of the MG369XA using product specific com-
mands sent from an external controller via the
IEEE 488 General Purpose Interface Bus (GPIB). It
contains a complete listing and description of all
MG369XA GPIB product specific commands and
several programming examples. The Anritsu part
number for the Model MG3692A, MG3693A,
MG3694A GPIB Programming Manual is
10370-10354.
1-7 Options The options available for the Anritsu MG369XA series CW Signal
Generators are described in the product data sheet (p/n 11410-00262).
A copy of this data sheet is located in Appendix B.
General Information Identification Number
MG369XA MM 1-5

1-8 Level of Maintenance Maintenance of the MG369XA consists of:
qTroubleshooting the instrument to a replaceable subassembly or
RF component.
qRepair by replacing the failed subassembly or RF component.
qCalibration.
qPreventive maintenance.
Trouble-
shooting The MG369XA firmware includes internal diagnos-
tics that self-test most of the internal assemblies.
When the MG369XA fails self-test, one or more er-
ror messages appear to aid in troubleshooting the
failure to a replaceable subassembly or RF compo-
nent. Chapter 5–Troubleshooting lists and describes
the self-test error messages and provides procedures
for isolating MG369XA failures to a replaceable sub-
assembly 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–Removal and Replacement Proce-
dures.
Calibration The MG369XA may require calibration after repair.
Refer to Chapter 4–Calibration for a listing of re-
quirements and procedures.
Preventive
Maintenance Preventive maintenance on the MG369XA consists
of cleaning the fan honeycomb filter, described in
Section 1-10.
1-9 Component Handling The MG369XA contains components that can be damaged by static
electricity. Figure 1-2 illustrates the precautions that should be fol-
lowed when handling static-sensitive subassemblies and components.
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.
Level of Maintenance General Information
1-6 MG369XA MM

General Information Component Handling
MG369XA MM 1-7
1. Do not touch exposed contacts
on any static sensitive
component.
2. Do not slide static sensitive
component across any surface. 3. Do not handle static sensitive components in areas where the
floor or work surface covering
is capable of generating a
static charge.
4. Wear a static-discharge
wristband when working with
static sensitive components.
5. Label all static sensitive
devices. 6. Keep component leads shorted together whenever possible.
7. Handle PCBs only by their
edges. Do not handle by the
edge connectors.
8. Lift & handle solid state
devices by their bodies – never
by their leads.
9. Transport and store PCBs and
other static sensitive devices
in static-shielded containers.
10. Additional Precautions:
Keep work spaces 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 Component Handling Precautions

1-10 Preventive
Maintenance The MG369XA must always receive adequate ventilation. A 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 environments. Clean
the filter as follows.
Step 1. Use a #3 screwdriver to remove the four screws that
fasten the filter guard to the rear panel (see Figure
1-3). Retain the screws for reassembly.
Step 2. Vacuum the honeycomb filter to clean it.
Step 3. Reinstall the filter guard.
Step 4. Fasten the filter guard to the rear panel using the
four screws that were removed in Step 1.
Preventive Maintenance General Information
1-8 MG369XA MM
Figure 1-3. Removing/Replacing the Fan Filter Guard

1-11 Startup
Configurations The MG369XA comes from the factory with a jumper across pins 2 and
3 of the A2 microprocessor PCB connector JP1 (Figure 1-4). In this
configuration, 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 MG369XA and A2
PCB. Refer to Section 6-5 for instructions.
Step 3. Locate connector JP1 and remove the jumper from
across pins 2 and 3. Refer to Figure 1-4 below.
Step 4. Install the jumper across pins 1 and 2 of connector
JP1.
Step 5. Install the top covers and connect the signal genera-
tor to line power. The instrument should come up in
standby mode.
General Information Startup Configurations
MG369XA MM 1-9
Figure 1-4. Startup Configuration of A2 Connector JP1

1-12 Recommended Test
Equipment Table 1-2 provides a list of recommended test equipment needed for
the performance verification, calibration, and troubleshooting proce-
dures presented in this manual.
Recommended Test Equipment General Information
1-10 MG369XA MM
INSTRUMENT CRITICAL
SPECIFICATION RECOMMENDED MANUFACTURER/MODEL USAGE*
Spectrum Analyzer Frequency Resolution: 0.01 to 40 GHz
Resolution Bandwidth: 30 Hz Anritsu Model MS2668C, with Option 2: 30 Hz RBW C, P, T
Phase Noise
Measurement System Frequency Range: 5 MHz to 26.5 GHz Aeroflex/Comstron PN9000, with: PN9060-00 Status Module
PN9470-00 Noise Output Module
PN9450-00 Lock Control Module
PN9342-00 Phase Detector Module
PN9530-00 Crystal Oscillator Module
P
Frequency Counter Frequency Range: 0.01 to 40 GHz
Input Impedance: 50W
Resolution: 1Hz
Other: External Time Base Input
Anritsu Model MF2414B C, P
Scalar Network Analyzer,
with RF Detector Frequency Range: 0.01 to 40 GHz Anritsu Model 56100A, with RF Detector: 560-7K50 (0.01 to 40 GHz) C, T
Power Meter,
with Power Sensor Power Range: –30 to +20 dBm (1mW to 100mW) Anritsu Model ML2437A/38A, with Power Sensor: MA2474A (0.01 to 40 GHz) C, P
Frequency Reference Frequency: 10 MHz
Accuracy: 5x10
–12 parts/day Absolute Time Corp., Model 300 C, P
Local Oscillator Frequency: 0.01 to 40 GHz
Single Side Band Phase Noise Anritsu Model MG3694A w/ Option 4 P
Attenuator Frequency Range: DC to 40 GHz
Max Input Power: >+17 dBm
Attenuation: 10 dB
Anritsu, Model 41KC-10 C, P
Attenuator Frequency Range: DC to 40 GHz
Max Input Power: >+17 dBm
Attenuation: 20 dB
Anritsu, Model 41KC-20 P
Special AUX I/O
Cable Assembly Provides interface between the MG369XA and the Power Meter Anritsu P/N: 806-97 P
Personal Computer PC Configuration: IBM AT or compatible
Operating System:
Windows 95/98/ME/NT/2000
Accessories: Mouse
Any common source C
Serial Interface Assembly Provides serial interface between the
PC and the MG369XA. Anritsu P/N: T1678 C
Table 1-2. Recommended Test Equipment
* P = Performance Verification Tests; C = Calibration;T=Troubleshooting

General Information Recommended Test Equipment
MG369XA MM 1-11/12
INSTRUMENT CRITICAL
SPECIFICATION RECOMMENDED MANUFACTURER/MODEL USAGE*
Digital Multimeter Resolution: 4-1/2 digits (to 20V)
DC Accuracy: 0.002% +2 counts
DC Input Impedance: 10 MW
AC Accuracy: 0.07% +100 counts
(to 20 kHz)
AC Input Impedance: 1MW
John Fluke, Inc., Model 8840A, with
Option 8840A-09K (True RMS AC) C, T
Tee Connectors: 50WBNC Any common source C, P
Cables Connectors: 50WBNC Any common source C, P, T
Table 1-2. Recommended Test Equipment (continued)
* P = Performance Verification Tests; C = Calibration;T=Troubleshooting

Table of Contents
2-1 Introduction ......................2-3
2-2 Major Subsystems...................2-3
Digital Control..................2-3
Front Panel Assembly ..............2-4
Frequency Synthesis...............2-4
A9 YIG Assembly ................2-5
ALC.......................2-5
RF Deck.....................2-5
Power Supply ..................2-5
Inputs/Outputs .................2-6
Motherboard/Interconnections ..........2-6
2-3 Frequency Synthesis .................2-9
Phase Lock Loops ................2-9
Overall Operation ...............2-10
RF Outputs 0.01 MHz to 40 GHz ........2-14
Step Sweep Mode................2-15
2-4 ALC and Leveling ..................2-15
ALC Loop Operation ..............2-15
2-5 RF Deck Assemblies .................2-17
RF Deck Configurations ............2-17
YIG-tuned Oscillator ..............2-17
RF Signal Filtering...............2-18
0.01 to 2 GHz Down Converter .........2-18
0.01 to 2.2 GHz Digital Down Converter
(Option 4) ...................2-19
Switched Doubler Module............2-19
Step Attenuators ................2-20
Chapter 2
Functional Description