HP 8920A Application Handbook page 99

On the Radio set the Receiver's Controls as follows:
11 Set power to ON.
12 If required, set frequency to the same value as
13 If required, set CTCSS tone frequency to the same value as
14 Set RF Gain to maximum (if equipped).
15 Set squelch control to minimum (if equipped).
16 Set the volume control until the AC Level reads 100% of the Receiver's
specified audio output.
Refer to the audio output specifications for the receiver being tested.
17 Verify Receiver's squelch is closed.
On the Test Set using the knob and data entry keys:
18 Set Amplitude to -137 dBm.
19 Slowly increase the Amplitude until the squelch remains open and the SI-
NAD indicator shows 10 dB (minimum).
CTCSS Sensitivity is displayed as Amplitude as shown.
• Record this level.
CTCSS
Squelch Sensi-
tivity
20 Set Amplitude to −47 dBm.
21 Slowly increase the AFGEN2 Freq in 0.1 Hz increments until the squelch
just closes.
• Record the frequency.
22 Slowly decrease the AFGEN2 Freq in 0.1 Hz increments until the squelch
RX TEST
SINAD
dB
0 11.16 24
Avg
RF Gen Freq AFGen1 Freq AFGen2 Freq
145.280000 1.0000 100.0
MHz kHz
Amplitude AFGen1 To AFGen2 To
0.282 FM FM
uV 3.00 5.00
kHz
Atten Hold
On/Off
Output Port
RF Out/Dupl
FM Receivers
step 4
step 4
AC Level
W
0.6321
To Screen
Filter 1
RF GEN
50Hz HPF
Hz
RF ANL
AF ANL
Filter 2
SCOPE
15kHz HPF
SPEC ANL
Hz
ENCODER
DECODER
Ext Load R
RADIO INT
8.00
Ω
More
99