Command reference
R&S
®
ZNB/ZNBT
1480
User Manual 1173.9163.02 ─ 62
[SENSe<Ch>:]CORRection:DATA
<ErrorTerm>, <Parameter>...
Writes or reads system error correction data for a specific channel
<Ch>
and calibra-
tion method (
[SENSe<Ch>:]CORRection:COLLect:METHod
). The analyzer test
ports 1 or 2 are implicitly specified with the correction terms. The setting command can
be used to transfer user-defined correction data 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 (
)
The sweep must be stopped to transfer calibration data; see program example for
[SENSe<Ch>:]CORRection:COLLect:SAVE: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:
to transfer
calibration data for arbitrary analyzer ports. The analyzer provides a default calibration
corresponding to a test setup which does not introduce any systematic errors; see
[SENSe<Ch>:]CORRection:COLLect:SAVE:DEFault
.
G and H matrices
The 7-term calibration types named Txx (e.g. TOM, TSM, TRM, TRL, TNA) are based
on a network analyzer with two ports i and j, each equipped with a test receiver and a
reference 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
22
21
12
11
i
i
m
m
G
G
G
G
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
22
21
12
11
j
j
m
m
H
H
H
H
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.
Suffix:
<Ch>
.
Channel number of the calibrated channel
Parameters:
<ErrorTerm>
R&S ZVR/ZVABT compatible commands
