User`s guide

To Test Bandwidth

Measuring Vout Response

1 Disconnect the port 2 cable from PV/DS test board and attach to probe output

on the AutoProbe Adapter.

2 Connect the 85052D cal standard load to PV/DS test board (non-pincher side).

3 Press "scale reference" key on the 8720ES VNA.

4 Set reference value to -20 dB.

5 Hold probe in place as described previously.

6 The display on screen is Vout.

Displaying Vout/Vin Response on 8720ES VNA Screen

1 Press the "Display" Key.

2 Then select the "Data/Memory" Screen Key. You may need to adjust the

"Reference Value", located under the "Scale Ref" key, slightly to position the

waveform at center screen.

3 Press marker key and position the marker to the first point that the signal is

-3 dB below center screen.

4 Read marker frequency measurement and record it in the test record located

later in this chapter.

5 The bandwidth test passes if the frequency measurement is greater that the

probe's bandwidth limit. Example: > 1 GHz (N2795A) or 2 GHz (N2796A).