Table Of Contents - Racal Instruments 9081 Maintenance Manual

Page
120
MHz LOOP
ASSEMBLY 19-0849
4-15
Introduction
4-15
120MHz
Oscillator
4-15
Phase Detector Path and Display Blanking
4-15
300 kHz
Reference
Output
4-15
Master Reference
Inputs
4-16
COUNTER
ASSEMBLY
1
9-0845 4-1
6
INTRODUCTION 4-16
LOGIC VOLTAGE
LEVELS
4-16
COUNTER
PRINCIPLES
4-17
Reference Frequency
4-17
Time
Base
and
Shift
Delay Data
4-17
Multiplex Readout
4-17
Shift
Data
4-20
CIRCUIT
DESCRIPTION
4-21
Carrier Input
4-21
Range
1
Select
4-21
Time
Base Drive
4-21
Time
Base
Encoding and Delay
4-21
Trailing Digit Blanking
4-22
Leading
Digit Blanking
4-22
Complete
Display Blanking
4-22
AUDIO
OSCILLATOR ASSEMBLY
19-0847
4-23
Introduction
4-23
Audio
Oscillator Circuit
4-23
FM LOOP
ASSEMBLY
19-0844
4-24
Principles of the System
4-24
Circuit Description:
400kHz
Loop
4-24
Sweep
Circuit
4-26
Deviation Monitoring
4-27
Modulation Audio
for
FM
4-28
Phase Modulation ((^M)
4-2
8
FM
Switching 4-28
POWER
SUPPLY
4-30
9081
&
9082 Vol.2
Contents
(3)