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Racal Instruments 9916 User Manual
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9916
UHF Frequency Meter
Workshop Manual
Courtesy of:-
Ron G7DOE
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G0RSQ
14
th
February 2015
2
Table of Contents
Default Chapter
6
Table of Contents
6
Chapter 1
12
Chapter 2
12
Frequency Measurement (Normal)
12
Frequency Measurement (Burst)
26
Frequency Measurement (LF Option)
26
Battery Economy Operation
26
Standbyoperation
27
Battery Charging
27
Carrying Handle
27
Description of Controls
28
CHAPTER 3 The CDI Chip
29
Dynamic Display System
30
Control Information
32
Control Sequence
32
9916Vol.2
32
Chapter 4 Techn Ical Description
34
Introduction
34
Logic Circuit Symbols
34
Normal Mode
34
Signal Input
34
IAI Channel Amplifier
34
Low Level Inhibit
35
Overload Protection Clod Indication
35
Low Level Inhibit
36
Signal Selection System
36
Frequency Standard
37
Oscillator Assembly 11-1254
37
Internal Standard Buffer
37
Externdl Standard Input
37
Display System
37
Resolution and Decimal Point Selection
38
Units Indicators
39
Overflow
39
Gate Indicator
39
Display Blanking
39
Manual Reset
40
Externa I Hold and Reset
40
Burst Mode
40
Summary of Operation
40
Circuit Operation
40
Check Mode
41
Power Supply
41
Vol T Stabil Iser
42
-24 Volt Supply
43
Battery Charging
43
Charge Irldicator
44
Battery Power
44
Battery Low Indicator
45
Over Discharge Protedion
45
Overlood Protection
45
LF Multiplier 11-1255
46
Principle
46
Circuit Description
46
Chapt~R
47
Remova I of Covers
48
Transformer Voltage Selection
48
Fuses
48
Power Lead
50
AC Power Supplies Check
50
Resistance Check
50
Supply Ran Voltages
50
Ripple Level
51
Battery Power Suppl Ies Check
51
Charging Rate Checks
51
Battery Economy Check
52
Segment, Decimal Point and Self Check
52
Sensitivity and Burst Check, Channel
54
Sensitivity and Burst Check, Channel 'A
55
Overload Lndi Cator Check
57
Frequency Standard Check
57
LF Multiplier
59
Remova I of Display PCB
60
Fitting Frequency Standard 9421 or 9442
61
Fitting Battery Pack 11-1289
62
Fitting Lf Multiplier 11-1255
63
4
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Racal Instruments 9916 Specifications
General
Brand
Racal Instruments
Model
9916
Category
Measuring Instruments
Language
English
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