Agilent Technologies HP8648A Uživatelský manuál stáhnout pdf (Strana 64)

100

101

FM Transmitters

Measurement Procedure:

1 Connect the Transmitter as shown.

CAUTION: The RF present at the Test Set RF IN/OUT connector must not exceed 60W

continuous (or 100 Watts for 10 sec/minute).

On the Test Set:

2 Press the PRESET key.

3 Press the TX key.

Using the knob and data keys:

4 Set Filter 1 to 300 Hz HPF.

5 Set Filter 2 to 3 kHz LPF.

On the Radio:

6 Key the Transmitter and keep keyed until the remaining steps are complet-

On the Test Set using the knob and data entry keys:

7 Set AFGen1 Lvl so that displayed FM deviation is 60% of the Transmit-

ter’s specified frequency deviation (typically 3 kHz).

On the Test Set Microphone Sensitivity is shown as AFGen1 Lvl.

Special Test Considerations

See "Incidental Audio" on page 46.

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