Performing Measurement Calibration; Using Flowgraphs To Identify Error Terms - Keysight Technologies N5221A Service Manual

General Purpose Maintenance Procedures
Error Terms
To find assemblies related to error term failures, refer to error term descriptions
in
related to each error term. Identify the assembly and refer to
"Troubleshooting."
Always suspect calibration devices, cables, or improper connector
maintenance as the primary cause of an error term anomaly.

Performing Measurement Calibration

A calibration must be performed to allow the analyzer to calculate the error
terms before they can be used as a tool:
Perform the following procedure only at a static-safe workstation, and
wear a grounded wrist strap.
This is important. If not properly protected against, electrostatic discharge
can seriously damage your analyzer, resulting in costly repair.
To reduce the chance of electrostatic discharge, follow all of the
recommendations outlined in
page
1. Connect a type-N cable to Port 2.
2. Perform a full 2-port calibration, FULL SOLT 2-Port. Refer to embedded

Using Flowgraphs to Identify Error Terms

Flowgraphs are a graphical representation of signal flow through the
measurement path. The flowgraphs in
Figure 8-4
for 1-port, 2-port, 3-port, and 4-port configurations respectively.
Figure 8-1 Flowgraph of One-Port Error Terms for Port 1
Keysight N5221A/22A Service Guide
"Error Term Data" on page
1-7, when performing the following calibration.
help in the analyzer if necessary.
illustrate the error terms associated with measurement calibration
where:
E = Error term
Subscript:
D = Directivity
8-8. Each description lists common assemblies
"Electrostatic Discharge Protection" on
Figure 8-1, Figure
Chapter 4,
8-2, Figure 8-3, and
8-3