Keysight InfiniiMax III+ Series, Руководство пользователя

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Performance Verification for N7000-Series Probes
8
InfiniiMax III+ Series Probes User’s Guide 141
4
Connect the NMD 3.5 mm (m) to 3.5 mm (f) adapter to the N5477A as shown in
the figure. This adapter is provided with the N5477A.
5
Connect the N5477A to the 1143A power supply and turn on the power supply.
6
Set the 1143A’s probe offset control button to “Zero” so no probe offset is
applied.
7
Connect the N7000A-series probe being tested to the N5477A adapter as
shown in the figure.
8
Connect the probe to the N5443A PV fixture:
a
Insert the probe with ZIF probe head into the PV holder far enough that the
tip wires can easily reach the pinches on the PV fixture.
b
Form the coax cables so that the tip wires are close to the pincher points
before trying to connect the tip wires. The connectors between the probe
head and the probe amp can be rotated to align the probe tip properly to the
punchers. Since the center trace of the PV fixture is above the ground plane,
the probe head should be tipped slightly so the tip wires touch the center
trace and ground plane at the same time.
c
Depress the actuators on the pincher and carefully insert one wire under the
center pincher and the other wire under one of the side pincher. Either
polarity of the probe can be tested and will yield the same results (but
opposite phase) if the probe is working properly. Figure 102 on page 142
shows a close up of the tip wires positioned under the pincher.
d
Ideally the probe head should not be angled toward the Port 2 side 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.
9
Use the following steps to Install a file to de-embed the adapter (1250-1749)
and the output side of the N5443A. This is the path from the male 2.92 mm
connector to the probe point of the N5443A from Port 1 of the VNA.
a
Create a Touchstone file by cutting and pasting the text in “Touchstone File
(1250-1749 & N5443A)" on page 125. Name the file:
Adaptor_1250_1749___OutputSideOfFixture_N5443A.s2p . This is the same file
that is used in Chapter 7 for the performance verification of N2830A-series
probes.
NOTE
You can also copy the data from the Adobe AIR version of Keysight’s Probe Resource Center
(PRC). Copying this data from the PRC is the simplest most reliable method to get the data. To
download the PRC, visit http://www.Keysight.com/find/PRC.