Anritsu Rubidium MG362 1A Series User manual

Maintenance Manual
Rubidium™ MG362x1A Series
Low-Noise RF/Microwave Signal
Generators
MG36221A, 9 kHz to 20.0 GHz
MG36241A, 9 kHz to 43.5 GHz
MG36271A, 9 kHz to 70.0 GHz
Anritsu Company
490 Jarvis Drive
Morgan Hill, CA 95037-2809
USA
Part Number: 10370-10386
Revision: C
Published: June 2023
Copyright 2023 Anritsu Company

Notes On Export Management
This product and its manuals may require an Export License or approval by the government of the product country of
origin for re-export from your country.
Before you export this product or any of its manuals, please contact Anritsu Company to confirm whether or not these
items are export-controlled.
When disposing of export-controlled items, the products and manuals need to be broken or shredded to such a degree
that they cannot be unlawfully used for military purposes.
Updates
Updates, if any, can be downloaded from the Documents area of the Anritsu web site at:
http://www.anritsu.com
For the latest service and sales contact information in your area, please visit:
http://www.anritsu.com/Contact-US/

MG362x1A MM PN: 10370-10386 Rev. C Contents-1
Table of Contents
Chapter 1 — General Information
1-1 Scope of Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-3 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-4 Identification Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-5 Contacting Anritsu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-6 Specifications and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-7 Level of Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-8 ESD Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Chapter 2 — Functional Description
2-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 MG362x1A Subsystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Digital Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Frequency Synthesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Reference Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Synthesizer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
YIG Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
ALC/AM/Pulse Modulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
RF Deck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-3 Frequency Synthesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
9 kHz to 2.2 GHz Digital Down Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
RF Outputs 2.2 GHz to 20 GHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Frequency Extension Module (FEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Frequency Switching Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Step Sweep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2-4 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Amplitude Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Pulse Modulation Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Pulse Generator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Frequency Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Phase Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2-5 ALC Loop Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
External Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Power Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Contents-2 PN: 10370-10386 Rev. C MG362x1A MM
Table of Contents (Continued)
2-6 RF Deck Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
RF Deck Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
YIG-tuned Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
RF Signal Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Frequency Extension Module (FEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Step Attenuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Block Diagram MG36221A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Chapter 3 — Performance Verification Using AACS
3-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-2 Test Records. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-3 Connector and Key Notation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-4 Test Equipment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3-5 Measurement Uncertainty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Maximum Permissible Tolerance of Return Loss of Adapters, Attenuators and Cables . . . 3-6
3-6 Internal Time Base Aging Rate Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Internal Time Base Aging Rate Test with Absolute Time Model 300. . . . . . . . . . . . . . . . . . 3-9
Internal Time Base Aging Rate Test with Symmetricom (Datum) Model 9390-9600 . . . . 3-11
3-7 Spurious Signals Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Harmonic Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Harmonic Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Non-Harmonic Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Non-Harmonic Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
3-8 Single Sideband Phase Noise Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
3-9 Power Level Accuracy and Flatness Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Power Level Log Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Power Level Accuracy (–50 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Power Level Accuracy (< –50 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Power Level Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Maximum Leveled Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
3-10 FM Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Test Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
3-11 Max FM Deviation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Ext Low Noise FM Max Deviation – Mod rates up to 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-32
Int Low Noise FM Max Deviation – Mod rates up to 1 MHz. . . . . . . . . . . . . . . . . . . . . . . . 3-34
Ext Low Noise FM Max Deviation – Mod Rates > 1 MHz . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Int Low Noise FM Max Deviation – Mod rates > 1 MHz. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37
Ext Wide FM Max Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
Int Wide FM Max Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
3-12 Min FM Deviation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Ext Low Noise FM Min Deviation (at 1vpk input) 5 GHz test . . . . . . . . . . . . . . . . . . . . . . . 3-40
Int Low Noise FM Min Deviation 5 GHz test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40

MG362x1A MM PN: 10370-10386 Rev. C Contents-3
Table of Contents (Continued)
3-13 FM Flatness Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41
FM Highpass Filter 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41
Ext Low Noise FM Flatness and 3 dB BW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41
Int Low Noise FM Flatness and 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44
Ext Wide (unlocked) FM 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
3-14 FM Deviation Accuracy Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47
Ext Low Noise FM Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-47
Int Low Noise FM Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-49
Ext Wide (unlocked) FM Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-49
Int Wide (unlocked) FM Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-51
3-15 FM Harmonic Distortion Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-51
Ext Low Noise FM THD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-51
Int Low Noise FM THD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-52
3-16 FM Mode Residual FM and Incidental AM Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53
Ext Low Noise FM Mode Residual FM / Incidental AM . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53
3-17 FM Mode Carrier Offset relative to CW mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-54
Ext Low Noise FM Mode Carrier Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-54
Perform Ext FM Offset Calibration to Minimize DC Offsets. . . . . . . . . . . . . . . . . . . . . . . . 3-54
Int Low Noise FM Mode Carrier Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-54
3-18 Phase Mod - Max Deviation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55
Ext Low Noise ΦM - Max Phase Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55
Int Low Noise ΦM - Max Phase Deviation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-58
Ext Wide ΦM - Max Phase Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-59
Modulation Index Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62
3-19 Phase Mod - Min Phase Deviation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64
Ext Low Noise ΦM Min Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64
Int Low Noise ΦM Min Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65
3-20 Phase Mod - Flatness Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65
Ext Low Noise ΦM Flatness and 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65
Measurement Uncertainties and Test Limits: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-66
Int Low Noise ΦM Flatness and 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-68
Measurement uncertainties and test limits: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-68
Ext Wide ΦM 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-71
Measurement Uncertainties and Test Limits: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-71
Int Wide ΦM 3 dB BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-72
3-21 Phase Mod - Deviation Accuracy Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75
Ext Low Noise ΦM - Phase Deviation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75
Int Low Noise ΦM - Phase Deviation Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-76
Ext Wide ΦM – Phase Deviation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-76
Int Wide ΦM - Phase Deviation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-77
3-22 Rear Panel FM-Out Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-78
FM-Out Accuracy, Ext FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-78
FM Out” Flatness, Ext FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-79

Contents-4 PN: 10370-10386 Rev. C MG362x1A MM
Table of Contents (Continued)
3-23 Amplitude Modulation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-80
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-80
AM Meter Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-81
AM Depth Indicator Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-82
AM Internal Source Verification (Linear Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-82
AM SEN_DAC Settings (Internal Source) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83
AM External Mod Linear Verification (Linear Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83
AM SEN_DAC Setting (External Source Linear Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-84
AM External Mod LOG Verification (Linear Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-84
3-24 Pulse Modulation Tests with the 86100C Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-85
Pulse Rise Time, Fall Time and Overshoot Measurement . . . . . . . . . . . . . . . . . . . . . . . . 3-86
Pulse Power Accuracy Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-88
Pulse On/Off Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-90
Chapter 4 — Adjustment
4-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-2 Test Equipment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Maximum Permissible Tolerance of Return Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-3 Station Asset Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Station Asset Utility Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Enter Test Equipment Assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Set the Communication Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
AACS Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
4-4 Initial Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
4-5 Harmonics and Spurious Signals Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
4-6 Single Sideband Phase Noise Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
4-7 Power Level Accuracy and Flatness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
4-8 Pulse Modulation Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
External Pulse Reference Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
External Pulse Reference Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
External Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Internal Pulse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
External Video FeedThru. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Internal Video FeedThru . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

MG362x1A MM PN: 10370-10386 Rev. C Contents-5
Table of Contents (Continued)
4-9 Amplitude Modulation Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
AM Meter Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
AM Internal Source Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
AM_Cal_DAC Linear Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
AM_Cal_DAC LOG Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
AM External Mod Linear Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
AM External Mod LOG Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
AM SEN_DAC Setting (External Source LOG Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
ALC Gain Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
4-10 FM and Phase Modulation Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Ext FM ADC Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Ext FM ADC Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Ext FM Input Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
Rear Panel FM Waveform Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
LNFM Tune Gain and FM Delay for YIG Low Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
LNFM Tune Gain for YIG High Band. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
Wide FM Tune Gain for YIG Low Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
Wide FM Tune Gain for YIG High Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37
Chapter 5 — Troubleshooting
5-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Self Test Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-3 MG362x1A Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5-4 Main Board Designator Pin-outs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5-5 Basic Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
5-6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Malfunctions Not Displaying an Error Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
MG362x1A Does Communicate Via Ethernet Connection . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5-7 Self Test Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
System Messages that Display Fail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Contents-6 PN: 10370-10386 Rev. C MG362x1A MM
Table of Contents (Continued)
5-8 SG Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
MOD Supply Voltage Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
ALC Temperature Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
YIG Temperature Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
SWF Errors (Switched Filter Errors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
REG Errors (Regulator Errors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
The OCXO module is Not Phase-locked to the External 10 MHz Reference. . . . . . . . . . . 5-16
The Hi-Performance Reference Not Phase-Locked to the External 100 MHz Reference. 5-17
The MG362x1A Displays Lock Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
ALC Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Output Power Level Related Problems in the DDC (9 kHz to 2.2 GHz). . . . . . . . . . . . 5-18
Output Power Level Related Problem Above 20 GHz . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
AM Meter or Associated Circuitry Failed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
Internal FM or ΦModulation Circuitry Failed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
Pulse Circuitry Failed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
Chapter 6 — Removal and Replacement
6-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6-2 Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6-3 Adjustment and Verification After Replacing an Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
6-4 Semi-Rigid Cable Installation (Standard Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
6-5 SMA Cable Installation (Standard Model). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
6-6 Frequency Extension Module (FEM) Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
6-7 Option 13 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
6-8 Option 3 and Option 56 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
6-9 Option 23 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
6-10 Removal Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Remove the Handles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
Remove the Rear Feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
Remove the Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
Remove the Top Sub-panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Remove Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Remove the Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
Remove the Rear Panel BNC PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Remove the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
Remove the Sub-panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
Remove the Standard Reference Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Remove the Modules with Mounting Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Remove the YIG Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
Remove The Frequency Extension Module (FEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
Remove the Modules with Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32
Remove the Dielectric Resonator Oscillator (DRO) (Option 13) . . . . . . . . . . . . . . . . . . . . 6-33
Remove the Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35

MG362x1A MM PN: 10370-10386 Rev. C Contents-7
Table of Contents (Continued)
Appendix A — Test Records
A-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A-2 Uncertainty Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A-3 Adapter, Attenuator and Cable Insertion Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A-4 Test Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A-5 Technical Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Internal Time Base Aging Rate Test (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Harmonics and Harmonically Related Signal Test Records . . . . . . . . . . . . . . . . . . . . . . . . A-3
Harmonics and Harmonically Related Signal Test Records . . . . . . . . . . . . . . . . . . . . . . . . A-4
Non-Harmonic Testing (Part 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Non-Harmonic Testing (Part 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Single Sideband Phase Noise Test (Standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
SSB Phase Noise (Option ___) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14
Power Line & Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
Power Level Log Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-19
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-21
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-22
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-23
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-24
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-25
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-26
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-27
Power Level Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-28
Power Level Flatness Test (No Option 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-29
Power Level Flatness Test (No Option 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-30
Power Level Flatness Test (Option 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-31
Power Level Flatness Test (Option 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-32
Maximum Leveled Power Test (Without Option 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-33
Maximum Leveled Power Test (Without Option 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-34
Maximum Leveled Power Test (With Option 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-35
Maximum Leveled Power Test (Without Option 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-36
Frequency Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-37
Frequency Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-38
Frequency Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-39
Frequency Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-40
Frequency Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-41
Frequency Modulation Test (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-42
Amplitude Modulation Test (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-43
Pulse Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-46
Pulse Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-47
Pulse Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-48
Pulse Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-49
Pulse Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-50
Pulse Modulation Tests (Option 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-51
Appendix B — Instrument Messages

Contents-8 PN: 10370-10386 Rev. C MG362x1A MM
Table of Contents (Continued)
B-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
B-2 Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
B-3 Informational Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
B-4 Warning Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
B-5 Self Test Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Appendix C — Updating Firmware
C-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
C-2 Updating Firmware on the MG362x1A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Use the MG362x1A WEB UPDATES Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Use a USB Memory Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3

MG362x1A MM PN: 10370-10386 Rev. C 1-1
Chapter 1 — General Information
1-1 Scope of Manual
This manual provides service information for the MG362x1A signal generators. The service information
includes replaceable parts information, troubleshooting, performance verification tests, calibration procedures,
functional circuit descriptions and block diagrams, and assembly/subassembly removal and replacement.
Throughout this manual, the terms MG362x1A, synthesizer, or signal generator are used to refer to the
instrument. Otherwise, the full model number is used where applicable. Manual organization is shown in the
table of contents.
1-2 Introduction
This chapter provides a general description of the MG362x1A 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 MG362x1A is a microprocessor-based, synthesized signal source with high resolution, ultra low
phase noise, and phase-lock capability. It generates both discrete CW frequencies and broad (full range) and
narrow band step sweeps across the frequency range of 9 kHz to 70 GHz.
All functions of the CW generator are fully controllable locally from the front panel or remotely (except for
power on/standby) via Ethernet (Sockets over TCP/IP) or GPIB (IEEE-488 interface bus). The technical data
sheet (PN: 11410-00928) is available Online.
1-4 Identification Number
All Anritsu instruments are assigned a unique six-digit ID number, such as “050101.” The ID number is
imprinted on a decal that is affixed to the rear panel of the instrument.
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 MG36271A Signal Generator and
Serial No. 230103.
Additional Documentation
Table 1-1. Related Manuals
Document Part Number Description
10100-00070 Rubidium™ MG362x1A Product Information, Compliance, and Safety
10370-10383 Rubidium™ MG362x1A Operation Manual
10370-10385 Rubidium™ MG362x1A Programming Manual
11410-00928 Rubidium™ MG362x1A Technical Data Sheet

1-5 Contacting Anritsu General Information
1-2 PN: 10370-10386 Rev. C MG362x1A MM
1-5 Contacting Anritsu
To contact Anritsu, visit the following URL and select the services in your region: http://www.anritsu.com/
1-6 Specifications and Options
The specifications and options available for the Anritsu MG362x1A series signal generators are described in
the technical data sheet (PN: 11410-00928) available Online.
1-7 Level of Maintenance
Maintenance of the MG362x1A consists of:
•Preventive maintenance
•Calibration
•Troubleshooting the instrument to a replaceable subassembly or RF component
•Repair by replacing the failed subassembly or RF component.
Preventive Maintenance
The MG362x1A signal generator care and preventive maintenance consists of cleaning the unit and inspecting
and cleaning the RF connectors on the instrument and all accessories. The RF and Microwave Connector Care
Instruction Sheet (10100-00031) provides instructions for the use and care of RF and microwave connectors.
Troubleshooting
The MG362x1A firmware includes internal diagnostics that self test the internal assemblies. When the
MG362x1A fails self test, one or more error messages appear on screen to aid in isolating the failure to a
replaceable subassembly or RF component. Chapter 5, “Troubleshooting” lists and describes the self test error
messages and provides procedures for isolating MG362x1A failures to a replaceable subassembly 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”.
Calibration
The MG362x1A may require calibration after repair. Refer to Chapter 3, “Performance Verification Using
AACS” for a listing of requirements and procedures.
1-8 ESD Requirements
The MG362x1A contains components that can be easily damaged by electrostatic discharge (ESD). An ESD
safe work area and proper ESD handling procedures that conform to ANSI/ESD S20.20-1999 or
ANSI/ESD S20.20-2007 is mandatory to avoid ESD damage when handling subassemblies or components
found in the MG362x1A instrument.

MG362x1A MM PN: 10370-10386 Rev. C 2-1
Chapter 2 — Functional Description
2-1 Introduction
This chapter provides brief functional descriptions of the major subsystems that are contained in each model
of the MG362x1A. In addition, the operation of the frequency synthesis, automatic level control (ALC), and
RF deck subsystems is described so that the instrument operator may better understand the overall operation
of the MG362x1A. Block diagrams are included to supplement the written descriptions.
2-2 MG362x1A Subsystems
The MG362x1A circuitry consists of various distinct subsystems that are contained on one or more printed
circuit board assemblies or in microwave components located on the RF deck. The five major subsystems
consist of the Digital Control, Front Panel Assembly, Rear Panel Assembly, Power Supply Assembly, and RF
Deck Assembly.
Digital Control
This circuit subsystem consists of the B2 microprocessor module. The central processor unit (CPU) located on
this module is the main controller for the MG362x1A. This controller directly or indirectly controls all
functions of the instrument. The CPU contains memory that stores the main operating system components and
instrument firmware, instrument calibration data, and front panel setup data during the power-off condition.
It has a GPIB interface that allows it to communicate with external devices over the GPIB, an Ethernet
interface (VXI-11 over TCP/IP) for LAN connectivity, and a serial interface to a serial terminal port. These
interfaces are all located on the rear panel. The CPU is directly linked via a dedicated data and address bus to
the front panel assembly, the B4 auxiliary/analog instruction module, the B6 ALC module, the B11 synthesizer
module, B14 referenced synthesizer module, and B6 YIG module.
The digital control module (B2) contains circuits that perform parallel-to-serial and serial-to-parallel data
conversion. The B2 also contains circuitry for many of the rear panel signals and a 14-bit resolution digital volt
meter (DVM).
Front Panel Assembly
This circuit subsystem consists of the front panel, the front panel rotary data knob, the front panel control
PCB, and the graphical user interface (GUI). The subsystem interfaces the front panel via the dedicated data
and address bus. The front panel rotary data knob is also linked to the CPU via the data and address bus.
The front panel PCB has circuits to control the GUI, turn the front panel LEDs on and off, and convert
keyboard switch matrix signals to parallel key code. It also contains the standby/operate line switch and the
optical encoder for the rotary data knob.
Frequency Synthesis
The frequency synthesis subsystem consists of the reference synthesizer module (B14), synthesizer module
(B11), and the YIG assembly (B6) which provide the reference frequencies and phase lock circuits for precise
control of the YIG-tuned oscillator frequencies. Options 03, 13, 26, 56 and 66 provide optimized phase noise
performance and stability.
Reference Module
The reference module consists of 10, 100, and 1600 MHz inputs and outputs with the high-stability 100 MHz
OCXO, or ultra-high stability Rubidium clock, or GPS clock via 1PPS.

2-2 MG362x1A Subsystems Functional Description
2-2 PN: 10370-10386 Rev. C MG362x1A MM
Synthesizer Module
The synthesizer module contains the DDS up converter, 1600 MHz tone generator, course PLL, and fine PLL.
The YIG loop frequency input provided by the YIG driver is phase locked and generates the lock circuitry for
the synthesizer 2 - 20 GHz out to the switched filter.
YIG Assembly
The YIG assembly (B6) contains the YIG-tuned oscillator and associated circuit assemblies. This assembly
contains the driver circuitry that provides the tuning current and bias voltages for the YIG-tuned oscillator.
The CPU controls the YIG assembly via the serial bus.
ALC/AM/Pulse Modulator
The CPU controls the ALC PCB and AM module via the dedicated data and address bus. This ALC circuit
subsystem consists of the ALC PCB, AM of the modulation module, output coupler, and switched filter. It
provides the following:
•Level control of the RF output power
•Current drive signals to the PIN switches located in the switched filter assembly (SWF) and the
frequency extension module (FEM)
•Drive signals for the step attenuator (Option 2)
RF Deck
This subsystem contains elements related to the generation, modulation, sweep control, power level control,
and CW-frequency RF signals. These elements include the YIG-tuned oscillator, frequency extension module to
obtain performance beyond 20 GHz, directional coupler/level detector, and optional step attenuator. Refer to
Section 2-6 for a functional overview of the RF deck subsystem.
Power Supply
The power supply subsystem consists of the power input connector/filter module, the regulator PCB, the power
supply PCB, the standby power supply PCB, and the power module fan unit. It supplies all the regulated DC
voltages used by the MG362x1A circuits. The voltages are routed throughout the instrument via the
motherboard PCB.
Inputs/Outputs
The rear panel and the digital control module (B2) contain the interface circuits for the majority of the rear
panel input and output connectors including the AUX I/O connector.
The rear panel EXT ALC IN, AM IN, and AM OUT are routed through the rear panel PCB and then through
the motherboard PCB to the ALC module (B5). The rear panel connectors, 10 MHz REF OUT and 10 MHz REF
IN, are routed through the rear panel PCB and coupled to the reference module (B14).
The rear panel FM/FM IN and FM/FM OUT connectors are routed through the rear panel PCB, and then
through the Motherboard PCB to the YIG-lock module (B6). The rear panel PULSE TRIG IN connector is
routed through the rear panel PCB, and then to the ALC module (B5). The rear panel PULSE SYNC OUT and
PULSE VIDEO OUT connectors are routed through the rear panel PCB and then to the optional pulse
generator via coaxial cables. The rear panel EFC IN connector is routed to the reference module (B14) via
coaxial cables.
The rear panel IEEE-488 GPIB and SERIAL I/O connectors are routed through the rear panel PCB and then
through the motherboard to the microprocessor module (B2). The rear panel (Ethernet over TCP/IP) connector
is routed through the mother board to the Ethernet/GPIB Controller assembly, and then to the microprocessor
module (B2).

Functional Description 2-3 Frequency Synthesis
MG362x1A MM PN: 10370-10386 Rev. C 2-3
2-3 Frequency Synthesis
The frequency synthesis subsystem provides phase-lock control of the MG362x1A output frequency. It consists
of a phase-locking loops that operating together, produce an accurately synthesized, low-noise RF output
signal.
9 kHz to 2.2 GHz Digital Down Converter
The 9 kHz to 2.2 GHz digital down converter assembly provides the digitized frequency control below 2.2 GHz.
During CW or step frequency operations in the 9 kHz to 2.2 GHz frequency range, a 2 to 4.4 GHz RF signal
output from J3 of the switched filter assembly goes to the input connector J1 of the down converter.
This signal is then down converted through a series of dividers resulting in a 9 kHz to 2.2 GHz RF signal
output. The resultant RF signal is fed through a series of band-pass filters, then detected, amplified, and
coupled out for use in internal leveling before being routed to the output connector J3. The detected RF sample
is routed to the ALC module. digital control signals from the CPU module are routed through the auxiliary
PCB.
RF Outputs 2.2 GHz to 20 GHz
Refer to the block diagrams of the RF deck in Figure 2-1 on page 2-10 through Figure 2-3 on page 2-12, for the
following descriptions. The MG362x1A uses one YIG-tuned oscillator capable of generating RF signals in the
frequency range of 2.2 to 20 GHz.
Frequency Extension Module (FEM)
The FEM (B11) is used on all MG362x1A models with RF output frequencies > 20 GHz.
The RF signal from the switched filter assembly is input to the FEM. The RF signal is filtered, amplified, then
doubled (43.5 GHz) or quadrupled (70 GHz) in frequency. The frequency extension module has three bandpass
filter paths that maximize harmonic performance.
Table 2-1. Digital Down Converter Frequency Bands
Band Frequency Range (in MHz)
0 0.009 to 12.5
1 12.5 to 17.5
2 17.5 to 22.5
3 22.5 to 31.25
4 31.25 to 43.75
5 43.75 to 62.5
6 62.5 to 87.5
7 87.5 to 125
8 125 to 175
9 175 to 250
10 250 to 350
11 350 to 500
12 500 to 700
13 700 to 1050
14 1050 to 1500
15 1500 to 2200

2-3 Frequency Synthesis Functional Description
2-4 PN: 10370-10386 Rev. C MG362x1A MM
Frequency Switching Speed
The frequency switching speed is the elapsed time from the beginning of a frequency change to the point at
which frequency is settled to within 1 kHz of the destination frequency. There is a “Frequency Valid” logic
output to the rear panel. A high-to-low transition of this bit will indicate that RF frequency is about to change.
The bit will remain low until RF is settled at the new frequency. This bit will serve as the trigger for
frequency-related switching time measurements.
Step Sweep Mode
Step (digital) frequency sweeps of the YIG-tuned oscillator RF output consist of a series of discrete, synthesized
steps between a start and stop frequency. Each frequency step is generated by applying the tuning signal
from the YIG module (B6) to the YIG-tuned oscillator’s main tuning coil, then phase-locking the RF output.
Every frequency step in the sweep range is phase-locked.

Functional Description 2-4 Modulation
MG362x1A MM PN: 10370-10386 Rev. C 2-5
2-4 Modulation
The modulation hardware (Option 27) is required to provide amplitude modulation (AM), frequency
modulation (FM), phase modulation (ΦM), and pulse modulation (PM) of the RF output signal. The modulation
module (B3) provides the modulation processing for each modulation mode.
Amplitude Modulation
Amplitude modulation (AM) of the RF output signal is accomplished by summing an external or internal
modulating signal into the ALC loop. External modulating signals come from the rear panel AM IN inputs, the
internal modulating signal comes from the function generator module (B3).
The AM input sensitivity DAC and the AM calibration DAC, under the control of the CPU, adjust
the modulating signal for the proper amount of AM in both the linear and the log modes of operation. The
adjusted modulating signal is summed with the level reference, slope, and detector inputs into
the ALC loop. This produces an ALC control signal that varies with the modulating signal. The action
of the ALC loop then causes the envelope of the RF output signal to track the modulation signal.
Pulse Modulation Operation
During pulse modulation, the ALC level amplifier ALC Module (B5) is operated as a sample/hold amplifier.
The level amplifier is synchronized with the modulating pulses from the function generator module (B3) so
that the ALC loop effectively operates only during the ON portion of the pulsed modulated RF output.
Pulse Generator Operation
The function generator module (B3) provides the internal pulse generating function for the MG362x1and
interfaces external pulse inputs from the rear panel to the pulse modulator driver in the external mode.
The pulse generator produces a pulse modulation waveform consisting of single, doublet, triplet, or quadruplet
pulse trains at variable pulse rates, widths, and delays. It operates at 100 MHz clock rate. The pulse generator
produces a sync pulse and video pulse output that goes to the rear panel and a sample/hold signal that goes to
the ALC module (B5). The sync pulse output is for synchronizing auxiliary instruments to the internally
generated pulse; the video pulse is a TTL level copy of the RF output pulse; and the sample/hold signal
synchronizes the ALC loop to the ON portion of the pulse modulating waveform. The MG362x1A pulse
modulation modes include:
•Internal pulse modulation mode: The pulse modulation waveform is generated and timed internally.
•External pulse mode: The external pulse source signal from the rear panel connectors is interfaced by
the pulse generator to the pulse modulation driver.
•External triggered mode: The pulse generator is triggered by the external pulse source signal to produce
the pulse modulation waveform.
•Free Running: The pulse generator produces pulses at the internal PRF. Single, Doublet, Triplet, or
Quadruplet pulse modulation waveforms at the internal pulse repetition rate. Pulse delay is not
available in this trigger mode.
•Gated: an external pulse gates the internal pulse generator on and off. When gated on, the pulse
generator produces a single pulse at the internal PRF.
•Delayed: The pulse generator produces Single, Doublet, Triplet, or Quadruplet pulse modulation
waveforms at the internal pulse repetition rate.
•Triggered: The pulse generator is triggered by an external trigger to produce Single, Doublet, Triplet, or
•Quadruplet pulse modulation waveforms: Pulse delay is not available in this trigger mode.
•Trgdelay: Triggered with delay: The pulse generator is triggered by an external trigger to produce
Single, Doublet, Triplet, or Quadruplet pulse modulation waveforms delayed by pulse delay.
•Composite: An external pulse triggers the internal pulse generator and also pulse modulates the output
signal. The internal pulse generator produces a single pulse ‘delayed by pulse delay1’ which also pulse
modulates the output signal.

2-4 Modulation Functional Description
2-6 PN: 10370-10386 Rev. C MG362x1A MM
Frequency Modulation
Frequency modulation (FM) of the YIG-tuned oscillator RF output is achieved by summing an external or
internal modulating signal into the FM control path of the YIG loop.
The external modulating signal comes from the rear panel FM/FM IN input connector. The internal
modulating signal comes from the modulation processing module (B4). Circuits on the FM module (B3) adjust
the modulating signal for the FM sensitivity selected, then sum it into the YIG loop FM control path. There, it
frequency modulates the RF output signal by controlling the YIG-tuned oscillator’s FM (fine tuning) coil
current.
Phase Modulation
Phase modulation (M) of the YIG-tuned oscillator RF output is achieved by summing an external or internal
modulating signal into the FM control path of the YIG loop. The external modulating signal comes from the
rear panel FM IN/FM IN input connector; the internal modulating signal comes from the function generator
module (B3).
Circuits on the FM module (B3) adjust the modulating signal for the M sensitivity selected, convert the
modulating signal to a M signal by differentiation, and then sum it into the YIG loop FM control path. There,
it phase modulates the RF output signal by controlling the YIG-tuned oscillator’s FM (fine tuning) coil current.

Functional Description 2-5 ALC Loop Operation
MG362x1A MM PN: 10370-10386 Rev. C 2-7
2-5 ALC Loop Operation
In the MG362x1A, a portion of the RF output is detected and coupled out of the directional coupler/level
detector as the feedback input to the ALC loop. The feedback signal from the detector is routed to the B5 ALC
Module where it is compared with a reference voltage that represents the desired RF power output level. If the
two voltages do not match, an error correction signal is fed to the modulator shaper amplifier circuits located
on the ALC module (B5). The resulting ALC control voltage output causes the level control circuits, located on
the A10 switched filter assembly, to adjust the RF output level. Thus, the feedback signal voltage from the
level detector will be set equal to the reference voltage.
The level reference DAC, under the control of the CPU, provides the RF level reference voltage. By setting
the output of this DAC to the appropriate voltage, the CPU adjusts the RF output power to the level selected
by the user.
External Leveling
In the external leveling mode, an external detector or power meter monitors the RF output level of the
MG362x1A instead of the internal level detector. The signal from the external detector or power meter goes to
the ALC module (B5) assembly from the rear panel input. The ALC controls the RF power output level as
previously described.
Power Sweep
In this mode, the CPU has the ALC step the RF output through a range of levels specified by the user. This
feature can be used in conjunction with the sweep mode to produce a set of identical frequency sweeps, each
with a different RF power output level.
Note
The instrument uses two internal level detection circuits. For frequencies < 2 GHz, the level detector
is part of the down converter. The signal from this detector is routed to the ALC module (B5) as the
Detector 0 input. For frequencies 2 GHz, the level detector is part of the main directional coupler.
The signal from this detector is routed to the ALC module (B5) as the Detector 1 input.

2-6 RF Deck Assemblies Functional Description
2-8 PN: 10370-10386 Rev. C MG362x1A MM
2-6 RF Deck Assemblies
The primary purpose of the RF deck assembly is to generate CW RF signals and route these signals to the front
panel RF OUTPUT connector. It is capable of generating RF signals in the frequency range of 9 kHz to 70 GHz.
The MG362x1A uses a single YIG-tuned oscillator. All other frequencies (except for 0.1 Hz to 10 MHz),
are derived from the fundamental frequencies generated by this oscillator, as follows:
•RF output frequencies of 9 kHz to 2.2 GHz are developed by successively dividing the fundamental
frequencies of 2 to 4.4 GHz.
•RF output frequencies of 2.2 GHz to 20 GHz are produced directly from the YIG-tuned Oscillator.
•RF output frequencies of 20 to 31.8 GHz are produced by doubling the fundamental frequencies of
10 to 15.9 GHz.
•RF output frequencies of 20 to 43.5 GHz are produced by doubling the fundamental frequencies of
10 to 20 GHz using the Frequency Extension Module.
•RF output frequencies of 43.5 to 70.0 GHz are produced by quadrupling the fundamental frequencies of
10 to 12.5 GHz using the Frequency Extension Module.
RF Deck Configurations
All MG362x1A RF deck assemblies contain a YIG-tuned oscillator, a switched filter assembly, and a directional
coupler. The configuration of the RF deck assembly varies according to the particular instrument model and
options installed.
Refer to the block diagrams in Figure 2-1 on page 2-10 through Figure 2-3 on page 2-12, which show the
various RF deck configurations and include all of the common RF components found in the series MG362x1A
RF deck assemblies.
YIG-tuned Oscillator
The MG362x1A models use a dual-band, 2 to 20 GHz YIG-tuned oscillator. The dual-band YIG-tuned oscillator
contains two oscillators: one covering the frequency range of 2.0 to 10.0 GHz and one covering the frequency
range of >10.0 to 20.0 GHz. Both of these oscillators use a common internal amplifier.
The YIG-tuned oscillator generates RF output signals that have low broadband noise and low spurious content.
It is driven by the main tuning coil current and bias voltages from the B6 YIG Module assembly and the fine
tuning coil current from the YIG lock Module. During CW mode, the main tuning coil current tunes the
oscillator to within a few megahertz of the final output frequency. The phase-lock circuitry of the YIG loop then
fine adjusts the oscillator’s fine tuning coil current to make the output frequency exact.