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FM Receivers
104
On the Test Set using the knob and data entry keys:
24 Verify Receiver’s squelch is closed.
25 Set Amplitude to −137 dBm.
26 Slowly increase the Amplitude until the squelch remains open and the SI-
NAD indicator shows 10 dB (minimum).
CDCSS Sensitivity is displayed as Amplitude as shown.
To Screen
RX TEST
AC Level
Filter 1
50Hz HPF
Filter 2
15kHz HPF
Atten Hold
On/Off
Ext Load R
RF GEN
RF ANL
AF ANL
SCOPE
SPEC ANL
ENCODER
DECODER
RADIOINT
V
dB
2.341
SINAD
RF Gen Freq
145.280000
MHz
Amplitude
0.351
uV
AFGen1 Freq
1.0000
kHz
AFGen1 To
3.00
kHz
FM
AFGen2 To
5.00
Hz
FM
010.18
Avg
24
CDCSS
Squelch Sensi-
tivity
AFGen2
Stop
Send