R&S FSH
Getting Started
Using the Network Analyzer
Quick Start Guide 1309.6269.12 - 09
61
Last, the R&S FSH asks you to terminate port 1 into a 50
Ω termination ("Load").
► Connect the "Load" to port 1.
► Press the "Continue" softkey.
When the calibration is finished, the R&S FSH shows the message
. The
status line now says
.
If you have calibrated a scalar measurement, the status line says
, because only
normalization is available for scalar measurements.
Quality of calibration deteriorates if you change either frequency parameters (center,
start or stop frequency and span), attenuation or tracking generator power.
After changing attenuation or tracking generator power, the calibration is still valid, but
probably more inaccurate. The R&S FSH shows that by adding a '?' to the status line
(e.g.
).
Calibration also remains valid if you change one of the frequency settings inside the
calibrated frequency range. However, results also may be more inaccurate. In that
case, the R&S FSH interpolates the correction data between the reference points of
the calibration before applying them to the measurement. The label in the status line
reads
.
If you change one of the frequency settings to a value that is outside the calibrated
frequency range, the R&S FSH gets uncalibrated and will use factory calibration
instead. The status line reads
.
2-Port Calibration
With a two-port calibration it is possible to measure the forward and reverse direction
without a new calibration.
If you change one of the parameters that interfere with the calibration by accident, you
can restore the last calibration settings.
► Press the MEAS key.
► Press the "Calibration" softkey.
► Select the "Restore Calibration Settings" menu item.
The R&S FSH restores all settings (including span and frequency) that were active
during the last calibration.
Note that calibration data is included in data sets. Therefore it is possible to start a
measurement without performing calibration after loading a data set.
For an extensive description of available calibration methods and states see the
operating manual.
