Anritsu ME7840A manual HOT S22

OPERATIONS, MEASUREMENT HOT S22

￿ Test Set Setting: Byte value for setting test set attenuation and source switch:

Internal Source	Value	External Source	Value
0 dB	8	0 dB	0
10 dB	9	10 dB	1
20 dB	10	20 dB	2
30 dB	11	30 dB	3
40 dB	12	40 dB	4
50 dB	13	50 dB	5
60 dB	14	60 dB	6

The PATS Hot S22 measurement provides the following additional fea- tures:

￿Ability to vary the AUT input excitation power level (Source 2 of Scorpion, at Port 1) while observing the Hot S22 response. Pressing “U” on the PC keyboard increases the input excitation power level (U for up). Pressing “D” decreases it. The actual input excitation power in dBm is displayed on the PC screen.

￿Ability to turn the amplifier input excitation source (Source 2 of Scorpion, at Port 1) ON and OFF while observing the Hot S22. Shift S turns Source 2 OFF. S turns it ON. This basically provides a com- parison of “Cold” S22 with Hot S22.

￿Ability to capture the Hot S22 plot at a given excitation level (his- tory plot on the PC screen) for comparison with other levels. Press “C” captures (creates history plot). Press “Shift + C” removes it.

￿Ability to show Hot S22 Smith Chart on the Scorpion Screen while Log Magnitude is displayed on the PC screen. The Scorpion display can be selected by Scorpion front panel controls during the mea- surement.

The level of the tone injected to the output of the AUT (Source 1 of Scorpion, at Port 2) can be set by the user via the “Specification File”.

ME7840A OMM 5-33