Agilent Technologies HP8648A Manuale Utente Scaricare il pdf (Pagina 224)

Using the Tracking Generator

223

Measurement Procedure:

1. Connect the Adapter as shown.

CAUTION: Do not exceed the connector’s rated input or permanent instrument damage

may result.

On the Test Set:

2. Press the PRESET key.

Using the knob and data entry keys:

3. Select the SPEC ANL screen.

4. From the Controls select Ant.

5. Set Center Freq to the pass frequency of the cavity under test.

6. Set Span to view desired frequency range.

7. Set Ref Level to −10 dB (or greater).

8. From Controls, select Main.

9. Select RF Gen from the Choices field.

10. From Controls select Track.

NOTE: Amplitude default of −10 dBm is typically sufficient for performing

measurements on passive cavities, however higher levels may be needed to

measure the cavity notch depth. The level can be changed to suit measurement

needs (e.g. increase measurement range, minimize incident input from other

sources, etc.). If Amplitude is changed, Ref Level will also have to be

changed.

11. From the Controls select RF Gen.

12. Select Auxiliary from the Choices field.

13. From Normalize select A Only.

14. From Normalize select Save B.

15. From Normalize select A-B.

16. From Controls, select Auxiliary.

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Agilent Technologies HP8648A Manuale Utente Pagina 224