Keysight Technologies InfiniiMax III Series User Manual page 81

Figure 56 shows a close up of the tip wires positioned under the
pinchers.
Ideally the probe head should not be angled toward the port 2 side
d
of the PV fixture, but a slight angle of 5 degrees is acceptable. If
angled too much, the measured BW of the probe will be degraded
due to coupling from the trace to the probe tip.
Figure 56 Close-up of tip wires positioned under pinchers
Install the proper file to de-embed the 1250-1749 adapter and the
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output side of the N5443A (i.e. the path from the male 2.92 mm
connector to the probe point of the N5443A) from port 1 of the VNA.
Create a Touchstone file for the 1250-1749 and N5443A PV fixture
a
by cutting and pasting the text in
N5443A)" on page 87. Name the file
Adaptor_1250_1749___OutputSideOfFixture_N5443A.s2p.
On the VNA, go to menu "Calibration/Fixturing Selections/2 Port
b
De-embedding" and select Port 1.
Set S2P file selection to the file saved in step a.
c
Check the "Enable De-embedding".
d
Under "Calibration" menu, select "Fixturing ON/off" to turn on
e
de-embedding.
Trigger VNA to perform a single sweep. a. Press "Trigger" under
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Channel Setup, and then the green soft-key for "Single". Display
should look like Figure
wires may not be making contact under the pinchers.
Under "Trace/Math/Memory" select "Data->Memory". This will save
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the de-embedded input voltage trace into the memory.
5. Performance Verification
Bandwidth Performance Verification
"Touchstone File (1250-1749 &
57. If it looks noticeably different, the probe tip
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