HP 8753E manual Observe the Characteristics of the Filter, Choose the Measurement Parameters

Observe the Characteristics of the Filter

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CENTER 900.000 000 MHZ S-JAN 3uu.000 000 MHZ

Figure 2-51. Characteristics of a Filter

w Generally, the passband of a hlter exhibits low loss. A relatively low incident power may be needed to avoid overdriving the next stage of the DUT (if that stage contains an amplifier) or the network analyzer receiver.

w Conversely, the stopband of a hlter generally exhibits high isolation. lb measure this characteristic, the dynamic range of the system will have to be maximized. This can be done by increasing the incident power and narrowing the IF bandwidth.

Choose the Measurement Parameters

1.Decide the frequency ranges of the segments that will cover the stopbands and passband of the filter. For this example, the following ranges will be used:

Lower stopband.. . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . ..650 to 880 MHz Passband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..I . . . . . . . 880 to 920 MHz Upper stopband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 920 to 1150 MHz

2. To set up the swept list measurement, press

242 Making Mearuremsnts