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FM Receivers
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On the Radio set the Receiver’s Controls as follows:
9 Set power to ON.
10 If required, set frequency to the same value as step 4.
11 Set squelch to minimum.
12 Set RF Gain to maximum (if equipped).
13 Set coded squelch feature (if equipped) to OFF.
NOTE: Failure to set coded squelch to off will cause the SINAD measurement to be
incorrect.
14 Set the volume control until the AC Level reads 100% of the Receiver’s rat-
ed audio output power.
Refer to the audio output specifications for the receiver being tested.
On the Test Set using the knob and data entry keys:
15 Decrease Amplitude until the SINAD meter reads 12 dB.
Sensitivity (12dB SINAD) is displayed as Amplitude as shown.
• Record the frequency as Assigned Freq for use later in the procedure.
Assigned
High, Low
Frequency
To Screen
RX TEST
AC Level
Filter 1
50Hz HPF
Filter 2
15kHz HPF
Atten Hold
On/Off
Ext Load R
8.00
Ω
RF GEN
RF ANL
AF ANL
SCOPE
SPEC ANL
ENCODER
DECODER
RADIO INT
More
W
dB
0.2775
SINAD
RF Gen Freq
145.285900
MHz
Amplitude
-113.0
dbm
Output Port
RF Out/Dupl
AFGen1 Freq
1.0000
kHz
AFGen1 To
7.70
kHz
FM
AFGen2 Freq
1.0000
kHz
AFGen2 To
Off
FM
0 11.97
Avg
24