Agilent Technologies N4413A, User Manual

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Using the Multiport Test System
How to Check Test Set Ports
Chapter 3 78
How to Check Test Set Ports
You can test the multiport test system test set hardware for damage to the signal channels
with the following procedure:
1. Connect the test cable of the signal channel in question to any other channel of the test set.
For example, if you suspect channel three, connect it to channel one, two, or four.
2. Pull down Utility > Manual Test-Set Control… to open the Manual Test Set dialog box.
Set the test set for a transmission path on the suspect channel.
3. If the test set has an attenuator, select the Attenuator tab and set the attenuator to 0.
4. Observe the thru on the network analyzer. Look for a smooth, monotonic trace, without
ripple or bumps, at or near the zero reference line on the network analyzer. Loss should be
less than 10 dB.
5. Switch through the attenuator settings. The trace should drop by approximately 10 dB and
the shape should remain nearly the same. High attenuator settings will result in a noisy
trace.
6. If the test set fails in any respect, return it to Agilent Technologies for repair.
How to Add a Calibration Kit Definition
The multiport test system comes with a number of predefined calibration kits. You can also
add your own calibration kits by editing the
calkits.txt file. The default location of this file is
..\Program Files\Agilent\system\ , the actual location may be different.
Editing instructions are included in the file. Make sure you edit and save the file in ASCII
text only format.
NOTE
Maintain a copy of your unmodified (original) calkits.txt file in a safe location.