Anritsu ME7840A Manuel d'utilisateur télécharger pdf (Page 94)

Test Set Setting: Byte value for setting test set

attenuation and source switch:

The PATS Hot S

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 S

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 S

. Shift

S turns Source 2 OFF. S turns it ON. This basically provides a com-

parison of “Cold” S

with Hot S

Ability to capture the Hot S

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 S

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”.

OPERATIONS, MEASUREMENT HOT S22

ME7840A OMM 5-33

Internal Source Value External Source Value

0dB 8 0dB 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

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 125 126

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Anritsu ME7840A Manuel d'utilisateur Page 94