Technical Manual

TLA 852/FLA 872
TM1205 Issue 2Page 5 - 14
COMPONENT COLLECTOR BASE EMITTER COMMENTS
TR401 0.29 0.73 0 RF Amplifier
TR402 0.87 1.02 0.29 RF Amplifier
TR403 0.845 0.678 0 First Mixer
TR404 0.733 0.015 0 AGC Switch
TR406 1.018 0.791 1.4 1V Series Regulator
TR410 0.95 0.937 0.264 First Local Oscillator
TR415 1.4 - 0 Beep Enable
TR416 1.4 - 0 Transducer Driver
Table 5.1: Radio Board DC Voltage Levels
TEST POINT DESCRIPTION VOLTAGE / SIGNAL
401 SINAD Output 0.56Volts
402 Radio Supply 1Volt
403 RSSI (AGC) 0.060Volts
404 Radio Ground 0Volts
405 Second IF 455kHz
406 Radio Ground 0Volts
414 Radio Ground 0Volts
416 Battery + 1.4Volts
418 Radio Ground 0Volts
Table 5.2: Radio Board Test Points
NOTE: All radio board measurements were taken with the receiver turned on. The battery
terminal voltage was 1.4 volts, the 1 volt line was 1.019 volts and battery economy was
disabled. Voltages may vary by ±20mV.