8-4 Service Guide N5230-90024
General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers
Error Terms N5230C
as a tool:
CAUTION 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 “Electrostatic Discharge Protection” on page 1-6, when performing the following
calibration.
1. Connect a test cable to Port 2.
2. Perform a full 2-port calibration,
FULL SOLT 2-Port. Refer to embedded help in the analyzer if necessary.
Using Flowgraphs to Identify Error Terms
Flowgraphs are a graphical representation of signal flow through the measurement path. The flowgraphs in
Figure 8-1, Figure 8-2, Figure 8-3, and Figure 8-4 illustrate the error terms associated with measurement
calibration for 1-port, 2-port, 3-port, and 4-port configurations respectively.
Figure 8-1 Flowgraph of One-Port Error Terms for Port 1
where:
E = Error term
Subscript:
D = Directivity
S = Source Match
R = Reflection Tracking
The error terms are the same for a one port measurement on Port 2 (S
22
).
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