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943-227-15 Digital Preamplifier
Operator Manual
2-2
INTEGRATING
ELECTROMETER
PGA
ALARM
OUTPUT
DAC EPROM
ANALOG
SWITCH
ADC
ACIA
HIGH VOLTAGE
POWER SUPPLY
RS232
VICO
LOOP
MICROPROCESSOR
CONTROL
SIGNAL
HIGH VOLTAGE
0 - 10 Vdc
0/-12 Vdc
MICROPROCESSOR
CONTROL
Resistor
Resistor
DETECTOR
ASSEMBLY
+VL
+TX
-TX
+RX
-RX
-VL
SIGNAL
Figure 2-1. Typical Detector Electronics Block Diagram
Table 2-1. Preamplifier Register Addresses
Function Hex Address
Electrometer Control 2000
ADC Convert CMD 4000
ADC Read Data 6000
ACIA T/R Data A000
ACIA Status Register A001
ACIA Command Register A002
ACIA Control Register A003
Input SW3 A008
RAM (not used) C000-DFFF
EPROM E000-FFFF