R&S FSH
Network Analyzer Mode
Calibrating Measurements
Operating Manual 1309.6275.12 - 14
125
C
(cal?)
The R&S FSH uses user calibration. However, the calibration is not accurate
because the TG power and receiver attenuation are not in line with the settings at
the time it has been calibrated. In that case you should repeat calibration.
C
(norm)
The R&S FSH uses normalization. To get that state you have to normalize the
transmission.
C
(norm?)
The R&S FSH uses normalization. However, the normalization is not accurate
because the TG power and receiver attenuation are not in line with the settings at
the time it has been calibrated. In that case you should repeat calibration.
C
(interp)
The R&S FSH interpolates the correction data between the reference points of the
calibration, because one of the frequency parameters (start, stop or center
frequency) inside the frequency range the R&S FSH has been calibrated for has
changed compared to those that have been in use during calibration.This could
result in an increasing measurement uncertainty.
When calibration has become invalid for any reason or the calibration data has
changed, you can restore the most recent calibration that was valid.
M
Press the "Calibration" softkey.
M
Select the "Restore Calibration Settings" menu item.
The R&S FSH restores the calibration data and the frequency settings that were
active.
4.1.1.2 Calibration Methods
The available calibration methods depend on whether you perform scalar or vector
measurements. In addition, calibration for reflection measurements is available only for
models with an VSWR bridge.
Scalar measurements
Scalar measurements provide normalization of transmission and reflection only.
Normalization is a simple but effective way to calibrate the measurement using one
calibration standard only. The correction data is deducted from this measurement. As
only one calibration standard is used, the accuracy is lower than that of a full
calibration available for vector measurements.
