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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
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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)