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Appendix A
Table A-1:
Block Diagram Legend
ADC
AUX. REG.
BUS-INTFC
CORRELATOR
CPU
CURR-XFMR
DC PWR ENTRY
DC/DC-CONV.
FIFO
FP.-INTFC
LIMITER
LO
LPF
MAIN PWR CONTROL
MAINS PWR ENTRY
Mixer
MOD.-INTFC
OFB-I/O
PWR FILTER
RCV PWR STROBE
RCV-AMP
RCV-XFMR
RECORDER
REFERENCE
RSSI
TEST-SIG
TIMING-GEN
TP(xx)
XDCR PWR FILTER
XDCR PWR REGULATOR
XDCR PWR STROBE
XDCR-SER. DATA IN
XDCR-SER. DATA OUT
XMT PWR FILTER
XMT-AMP
XMT-SIG
XMT-XFMR
page A-8
Electronics Unit Block Diagram Legend
Description
Analog to Digital converter
Auxiliary regulator
Bus interface circuit
Correlator, digital signal processor
Central processing unit
Current sense transformer
DC power entry circuit
DC/DC switching regulator
First In - First Out Register
Front panel Interface
Amplitude Limiter
Local oscillator frequency signal
Lowpass filter
Main power control of system
Mains power entry circuit
Frequency mixer
Modem interface and Modem
Off board input/output device
Filter for mains and DC-power supply
Power control of on-board receiver functions
Receiver amplifier
Receive channel input coupling transformer
Solid state recorder for data storage
Reference voltage
Relative signal strength indicator
Test signal
Timing generator
Test points
Transducer power supply filtering
Transmitter and transducer supply voltage regulator
Power control of transmitter power and transducer supply
voltage
Serial data signal from electronics to transducer
Serial data signal from transducer to electronics
Transducer power filter
Transmitter amplifier
Transmit signal waveform
Transmitter output transformer
MGD Technologies, Inc.
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