FM Receivers
112
Measurement Procedure:
CAUTION: Before connecting the Signal Generator, set RF Output power to OFF (or
maximum attenuation).
1Connect the Receiver and Signal Generator as shown.
On the Test Set:
2Press the PRESET key.
3Press the RX key.
Using the knob and data entry keys:
4Set RF Gen Freq to the receiver operating frequency.
5Set Amplitude to −47 dBm (1 mV).
6Set AFGen1 To 60% of the Receiver’s specified maximum frequency de-
viation (typically 3 kHz).
7Set Ext Load R to the specified audio ou tput impedanc e (typica lly 8 ohms ).
8Set AC Level meter to measure Watts.
On the Radio set the Receiver’s Controls as follows:
9Set 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 Consid er at i ons See "Coded Squelch" on page 47.