Agilent Technologies HP8648A Manual do Utilizador descarregar pdf (Página 172)

SSB Transmitters

171

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) or permanent instrument damage

may result.

On the Test Set:

2. Press the PRESET key.

3. Press the TX key.

Using the knob:

4. Set AF Anl In to SSB Demod.

On the Radio:

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

ed.

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

6. Set AFGen1 Lvl until a measurable RF signal is displayed (typically >5-10

mV).

Test Set Options Required

Spectrum Analyzer/Tracking Generator (option 102)

Special Test Considerations

Cable and adapter mismatch must be considered when

measuring harmonics and spurious emissions of a trans-

mitter. If an external attenuator is used, special care must

be taken to ensure the attenuator is not causing any spuri-

ous or harmonic emission. Also, if spurious emissions are

located, verify that the transmitter is the source, and not

another object radiated emissions near the test site

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Agilent Technologies HP8648A Manual do Utilizador Página 172