Keysight N2800A User Manual page 81

Figure 63 Close-up of tip wires positioned under pinchers
7 Install the proper file to de-embed the 1250-1749 adapter and the 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.
8 Trigger VNA to perform a single sweep. a. Press "Trigger" under Channel Setup, and then
the green soft-key for "Single". Display should look like
different, the probe tip wires may not be making contact under the pinchers.
9 Under "Trace/Math/Memory" select "Data->Memory". This will save the de-embedded
input voltage trace into the memory.
InfiniiMax III Series Probes User's Guide
opposite phase) if the probe is working properly.
of the tip wires positioned under the pinchers.
Ideally the probe head should not be angled toward the port 2 side of the PV
d
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.
Create a Touchstone file for the 1250-1749 and N5443A PV fixture by
a
cutting and pasting the text in
page 88. 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.
Figure 63
"Touchstone File (1250-1749 & N5443A)"
Figure 64. If it looks noticeably
Performance Verification
shows a close up
on
6
81