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AM Receivers
156
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 AM at desired modulation depth (typically 30%).
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 squelch control 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/Com-
biner (HP 11636A).