TFT EAS 930A - FM Receiver Test Point Data; NOAA Weather Receiver Test Point Data

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Table 6-2. FM Receiver Test Point Data
TEST POINT
DESCRIPTION
TP1 RSSI
2.3 V
TP2
PLL Phase Voltage 3.8 V
TP3 Demodulated Audio 0.6 Vp-p
TP4
LO Output to PLL 0.5 Vp-p
TP5 6 MHz clock
to µprocessor 3Vp-p
6. 5.3 NOAA Weather Receiver Module
Setup Conditions:
1 . Channel Select switch at 6
LEVEL WAVEFORM
DC
DC
/\
V
/\
V
/\
-----v
2. RF Frequency= 162.5 MHz , Mod= ±5 kHz , Tone= 1 kHz , Level= 5 µV
3. DX/LOCAL switch to DX position
Table 6-3.
NOAA Weather Receiver Test Point Data
TEST POINT DESCRIPTION LEVEL WAVEFORM
TP1
RSSI 6.7 V
DC
TP2 Second IF 0.5 Vp-p
/\
V
TP3 Demodulated Audio
0.5 Vp-p
/\
V
TP4 2nd LO Output to µprocess. 3 Vp-p
/\
V
TP5
PLL Phase Voltage 3.1 V
DC
6-6