HP 8112A Operating, Programming And Servicing Manual page 17

Servicing the Control Board
10.5.
Theory of Operation
Introduction
Timer . . . . . . . . . . . . . . . . . . . .
Address Decoders
Timing Range Decoder
DAC Reference Circuit
Digital to Analog Converters . . . . . . . . . .
Normal
Reciprocal
Byte offset latches and Offset DAC . . . . . . .
Byte Latching
Offset DAC
Parameter
Troubleshooting
Timer . . . . . . . . . . . . . . . . . . . .
Address Decoders
Timing Ranges . . . . . . . . . . . . . . . .
Control . . . . . . . . . . . . . . . .
Period
Delay Control
Control . . . . . . . . . . . . . . . .
Width
Slope Control
Amplitude
Offset Control . . . . . . . . . . . . . . . .
Timer . . . . . . . . . . . . . . . . . . . .
10.6. Servicing the Burst Control Circuit
Theory of Operation
Introduction
Burst Number Acceptors
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Counter
Blocking Flip-flop
Period Generator Control
Counter reset
Troubleshooting
Output Address Decoder
Burst Counter
10.7. Servicing the Microprocessor and Front-panel
Theory of Operation
Introduction
Read Only Memory (ROM)
Random Access Memory (RAM)
RAM Battery Supply . . . . . . . . . . . . .
HP-IB General Purpose Interface Adapter . . , .
Microprocessor Interface Signals
HP-IB Interface Signals . . . . . . . . . . .
Address Decoding
Sub-decoder 1
Sub-decoder 2
Control Board Address Decoding . . . . . . . .
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operation . . . . . . . . . . . . . .
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operation
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Control
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Control . . . . . . . . . . . . . .
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10.5-l
10.5-l
10.5-l
10.5-2
10.5-2
10.5-2
10.5-2
10.5-3
10.5-3
10.5-3
10.5-4
10.5-4
10.5-11
10.5-11
10.5-11
10.5-13
10.5-13
10.5-13
10.5-14
10.5-14
10.5-14
10.5-15
10.5-16
10.6-l
10.6-l
10.6-l
10.6-2
10.6-2
10.6-2
10.6-2
10.6-5
10.6-5
10.6-6
10.7-l
10.7-l
10.7-2
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10.7-2
10.7-2
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10.7-3
10.7-4
10.7-4
10.7-4
10.7-5
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