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Racal Instruments Manuals
Inverter
9081
Maintenance manual
Racal Instruments 9081 Maintenance Manual
Synthesized signal generators
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Contents
Table of Contents
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Table of Contents
Table of Contents
Distortion Check
Channel Spacing Control
120Mhz LOOP ASSEMBLY 19-0849
Introduction
120Mhz Oscillator
300Khz Reference Output
Master Reference Inputs
Counter Assembly
Introduction
Logic Voltage Levels
Counter Principles
Reference Frequency
Time Base and Shift Delay Data
Multiplex Readout
Shift Data
Counter Assembly Data
Circuit Description
Carrier Input
Range
Select
Time Base Drive
Time Base Encoding and Delay
Trailing Digit Blanking
Leading Digit Blanking
Complete Display Blanking
Audio Oscillator Assembly 19-0847
Introduction
Audio Oscillator Circuit
Fm Loop Assembly 19-0844
Principles of the System
Circuit Description: 400Khz Loop
Sweep Circuit
Deviation Monitoring
Modulation Audio FM
Phase Modulation ((^M)
FM Switching
Power Supply
Mains Voltage Selection Switches
List of Test Equipment Required
Power Supply Tests
Removal of Covers
Mains Input Resistance Readings
Tuning Checks
Carrier Frequency Ranges
Preliminary System Checks
Output System
FM System
Calibration
Output System Assembly
Audio Oscillator Assembly 19-0847
Fm Loop Assembly
Distortion Check
Level Accuracy Check
Spurious Check
Far-Off and Close-In Noise Checks
Residual Fm Check
Fm Deviation Check
Fm Distortion Check
Phase Modulation Check
Am Frequency Response Check
Reconnection of High Level Amplifier
Level Accuracy Check
Am and Fm Frequency Response Check
Am Depth and Distortion Check
Attenuator Check
Distortion Check
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