HP 8920A Application Handbook page 89

NOTE:
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
11 Set squelch to minimum.
12 Set RF Gain to maximum (if equipped).
13 Set coded squelch feature (if equipped) to OFF.
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
RX TEST
SINAD
dB
0 11.97 24
Avg
RF Gen Freq AFGen1 Freq AFGen2 Freq
145.285900 1.0000 1.0000
MHz kHz
AFGen1 To AFGen2 To
Amplitude
-113.0 FM FM
dbm
7.70 Off
kHz
Atten Hold
On/Off
Output Port
RF Out/Dupl
FM Receivers
step 4.
AC Level
W
0.2775
To Screen
Filter 1
RF GEN
50Hz HPF
kHz
RF ANL
AF ANL
Filter 2
SCOPE
15kHz HPF
SPEC ANL
ENCODER
DECODER
Ext Load R
RADIO INT
8.00
Ω
More
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