Racal Instruments 9916 Workshop Manual page 7

CHAPTER 4
9916
Vol.
2
TECHN
ICA L
DESCRIPTION
Introduction
Logic Circuit Symbols
Normal Mode
Signal Input
IAI Channel Amplifier
AGe and Attenuator
Low Level Inhibit
Overload Protection
clOd
Indication
IB' Channel Ampl ifier
AGe and Attenudtor
low Level Inhibit
Signal Selection System
Frequency Standard
Oscillator Assembly
11-1254
Internal Standard Buffer
Externdl Standard Input
Display System
Resolution and Decimal Point Selection
Uni ts Ind i
ca
tors
Overflow
Gate Indi cator
Display Blanking
Manual Res-et
Externa I Hold and Reset
Burst
Mode
Summary of Operation
Circuit Operation
Check Mode
Power Supply
Lirle Power
+
5
Vol t Stabil iser
- 5
Volt Stabilis-er
+ 24
Volt Supply
+
2
Volt Supply
Battery Charging
Charge Irldicator
Battery Power
Battery Low Indicator
Over Discharge Protedion
. Overlood Protection
Standby Operation
Battery Economy Operation
LF Multiplier
11-1255
Principle
Circuit Description
4-1
4-1
4-1
4-1
4-1
4-1
4-2
4-2
4-2
4-3
4-3
4-3
4-4
4-4
4-4
4-4
4-4
4-5
4-6
4-6
4-6
4-6
4-7
4-7
4-7
4-7
4-7
4-8
4-8
4-8
4-9
4-9
4-10
4-10
4-10
4-11
4-11
4-12
4-12
4-12
4-12
4-\2
4-13
4-13
4-13
Contents (2)