GUI Reference
R&S
®
ZNB/ZNBT
498
User Manual 1173.9163.02 ─ 53
6.11.4.1
Controls on the Use Cal Tab
The buttons in the "Use Cal" tab open the following dialogs:
●
"Scalar Power Cal" – "Active Power Cals...":
●
"Manage Cals" – "Cal Manager...": See
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
Chapter 6.11.4.3, "Calibration Manager Dialog"
Note:
A label "Cal Off" appears behind the trace list if the system error correction is
switched off; see also
Chapter 5.5.4, "Calibration Labels"
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
Chapter 5.7.4.1, "Calibration Options"
●
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
12
=0 if S
21
is measured).
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.
Cal Softtool
