Agilent Technologies HP8648A Manuale Utente Scaricare il pdf (Pagina 110)

100

101

FM Receivers

109

Measurement Procedure:

1 Connect the Receiver 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 test load resistance.

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

Test Load

Special Test Considerations

See "Receiver Test Loads" on page 46.

See "Coded Squelch" on page 47.

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Agilent Technologies HP8648A Manuale Utente Pagina 110

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