FM Receivers
112
Measurement Procedure:
CAUTION: Before connecting the Signal Generator, set RF Output power to OFF (or
maximum attenuation).
1 Connect the Receiver and Signal Generator as shown.
On the Test Set:
2 Press the PRESET key.
3 Press the RX key.
Using the knob and data entry keys:
4 Set RF Gen Freq to the receiver operating frequency.
5 Set Amplitude to −47 dBm (1 mV).
6 Set AFGen1 To 60% of the Receiver’s specified maximum frequency de-
viation (typically 3 kHz).
7 Set Ext Load R to the specified audio output impedance (typically 8 ohms).
8 Set AC Level meter to measure Watts.
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 RF Gain to maximum (if equipped).
12 Set coded squelch feature to minimum (if equipped).
13 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.
Additional Equipment
Required
Signal Generator (HP 8647A) and a Power Splitter/Combiner
(HP 11636A).
Special Test Considerations
See "Coded Squelch" on page 47.
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