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Calibration Types Available
The following table contains the calibration types and advanced settings available for all
compatible network analyzers:
Table 3-1 Calibration Types and Advanced Settings Available
Calibration Types
1-Port Reflection
Full 2-Port
Full 2-Port (with isolation)
Full 3-Port
Full 4-Port
Advanced Settings
Adapter Removal
Flush (zero length) THRU
Unknown THRU
User-Characterization
a. 8509xC only.
b. Unknown THRU setting available with E835xA and E836xA,B analyzers.
c. User-Characterization available with firmware revision A.03.50 (February 2003).
When to Correct for Isolation
Correction for isolation is a consideration when measuring high-loss devices such as saw
filters or diplexers. When maximum dynamic range is required, correction for isolation can
remove the errors due to crosstalk (between test ports) for transmission measurements.
When you include isolation with a two, three, or four-port calibration, the analyzer
automatically applies averaging to reduce noise in the measurement. Without averaging,
you will have noise in the measurement of the crosstalk, and could raise the noise floor
when the analyzer uses this in its error correction.
The analyzer system isolation is normally sufficient for most measurements, and
correction for it is usually unnecessary. As long as crosstalk is below the noise floor, it is
best NOT to correct for isolation using ECal. As of PNA firmware release 4.26, measuring
isolation as part of the ECal process is no longer supported.
Chapter 3
PNA
Yes
Yes
a
Yes
Yes
Yes
Yes
Yes
b
Yes
Yes
Network Analyzer Series
ENA
Yes
Yes
Yes
Yes
Yes
No
No
No
c
Yes
Operating ECal Module
Setting Up a Calibration
VNA
Yes
Yes
Yes
—
—
No
Yes
No
No
3-3
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