Sensor SMT-200 Operation And Technical Manual page 85

SENSOR
Io
6.4 SMT-200 Main Board block diagram
This section contains a functional description of the SMT-200 main board. The board contains all the
required circuitry to generate the test signals for the geophones and digitise the signals via the A-D
converter. In addition the board has the keypad and LCD display drivers and also the power supply
circuit.
Sh 1
P
Sh 1
C
/
1
0
4
DATA
BUFFER/
B
LATCH
U
S
JP3
SMT-200 Operations and Technical Manual 2.00/R1
DATA LATCH ENABLE
DATA BUS
+12V
Sh 1
Temp
Sensor
Sh 2
A to D
Speaker
Converter
Connector
JP4
Sh 5
Address
Generator Selector
Sh 5
ROM
Lookup Table
Converter
ADDRESS BUS
IOR / IOW
AEN
Power Monitor
-23V Supply
±15V Supply
+5V Supply
Sh 7
DATA BUS
PC/104
On / Off
Ext On / Off
Sh 5
Driver
Sh 5
D to A
Filter
Section 6 SMT-200 Technical
LCD
Display
Volt Adjust.
Sh 1
Output Port
Input Port
Keyboard
Sh 5
OUTPUT DATA LINES
Sh 3
Geophone
Circuit
LEAKAGE PROBE
Sh 1
Address
Decoder
Sh 6
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