R&S ZNA26 - Page 1244

Command reference
R&S
®
ZNA
1244User Manual 1178.6462.02 ─ 20
[SENSe<Ch>:]CORRection:CDATa <ErrorTerm>, <SourcePort>, <LoadPort>,
<CorrectionData>...
[SENSe<Ch>:]CORRection:CDATa:PORT<PhyPt> <ErrorTerm>, <SourcePort>,
<LoadPort>, <CorrectionData>...
Writes or reads system error correction data for a specific channel <Ch>, calibration
method ([SENSe<Ch>:]CORRection:COLLect:METHod:DEFine), and port combi-
nation <SourcePort>, <LoadPort>. The setting command can be used to transfer
user-defined correction data <CorrectionData> to the analyzer; the query returns
the current correction data set. ASCII or block data can be transferred, depending on
the selected data transfer format (FORMat[:DATA]).
The sweep must be stopped to transfer calibration data; see program example for
[SENSe<Ch>:]CORRection:COLLect:SAVE:SELected:DEFault.
Note: This command affects the active calibration of channel no. <Ch> or the factory
calibration (if no channel calibration is active). For the factory calibration, the query
form is allowed only (no change of factory calibration data).
Tip: The analyzer provides a default calibration corresponding to a test setup which
does not introduce any systematic errors; see [SENSe<Ch>:]CORRection:
COLLect:SAVE:SELected:DEFault.
For an overview of calibration methods and error terms refer to Chapter 4.5.1, "Calibra-
tion types", on page 160.
G and H matrices
The 7-term calibration types named Txx (e.g. TOM, TRM, TRL, TNA) are based on a
network analyzer with two ports i and j, each equipped with a test receiver and a refer-
ence receiver. The system errors are described in terms of two "error two-ports" P
G
and P
H
:
●
The error two-port P
G
is assigned to port i of the analyzer. Its transmission matrix G
describes how the system errors modify the outgoing and incident waves at port i:




















test i
ref i
2221
1211
i
i
m
m
GG
GG
a
b
●
The error two-port P
H
is assigned to port j of the analyzer. Its transmission matrix H
describes how the system errors modify the measured incident and outgoing
waves at port j:




















ref j
test j
2221
1211
j
j
m
m
HH
HH
b
a
In the two equations above, a and b denote the waves at the calibrated reference
plane i and j (e.g. the input and output of the 2-port DUT). The m waves are the raw
measured waves of test port i and j. The subscripts "ref" and "test" refer to the refer-
ence and test receivers, respectively. During the calibration the network analyzer
acquires ratios of wave quantities, which leaves one of non-diagonal matrix elements
of G or H as a free normalization factor. The network analyzer uses the normalization
H
21
= 1.
SCPI command reference