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2. RSSI (H) Sensitivity Adjustment
• Perform the adjustment at T3CH (28CH : 49.910MHz) as a rule.
Setting :
Procedure :
1
FM rf signal generator condition :
Carrier frequency
: 49.910MHz
Modulation frequency
: 20Hz (EXT)
Deviation
: AM 50%
Output level
: 60dB
µ
V (2
µ
V) (EMF)
2
Use the oscilloscope to confirm the FM rf signal generator input
(AF) signal waveform and RSSI signal, and use the RV101 so
that they are synchronized matched (duty is synchronized).
R123
IC101
FL101
TP19
C123
CF101
TP3
C 6
TP2
[BASE MAIN BOARD]
(Component side)
RV101
[BASE MAIN BOARD]
(Conductor side)
TP2
TP3
FM rf signal
generator
AF oscillator
+
-
output : 20Hz
TP9
TP19
oscilloscope
(DC range)
TP9
RSSI WAVEFORM
RSSI output waveform
RF signal EXT
signal 20Hz
0V
Adjust so that they
synchronize at 0V.
