R&S ZNB Series User Manual page 532

®
R&S ZNB/ZNBT
5.11.4.1 Controls on the Use Cal tab
User Cal Active
Activates or deactivates the system error correction in the active channel. "User Cal
Active" is available only if a valid system error correction is available for the active
channel; see "Channel State" in
on page 534.
Note: A label "Cal Off" appears behind the trace list if the system error correction is
switched off; see also
status of each channel and trace appears in the setup information ("Setup" > "Info..." >
"Setup").
Remote command:
[SENSe<Ch>:]CORRection[:STATe]
Load Match Correction
Load match correction prevents a possible impairment of the transmission S-parameter
measurements due to the influence of the waves reflected at the receive (load) ports. It
is performed as follows:
●
The correction is based on the system error corrected a- and b-waves of the
source and load ports. An appropriate calibration is a prerequisite for the load
match correction; see
●
A reverse sweep is automatically performed during the measurement.
●
The correction is calculated under the assumption that the reverse transmission
factor is zero (e.g. S
Load match correction can provide a significant improvement of the transmission S-
parameter measurements if the load ports are poorly matched. With sufficiently
matched load ports, you can disable the correction to gain speed.
Note: Disable the load match correction if your test setup or DUT is not suited for
reverse sweeps or if you want to gain speed.
Remote command:
[SENSe<Ch>:]FREQuency:CONVersion:GAIN:LMCorrection
User Manual 1173.9163.02 ─ 62
Chapter 5.11.4.3, "Calibration Manager
Chapter 4.5.4, "Calibration
Chapter 4.7.4.1, "Calibration
=0 if S is measured).
12 21
GUI reference
labels", on page 181. The calibration
options", on page 238.
Cal softtool
dialog",
532