R&S FSH3 Setting and Using the Measurement Functions
If the cable attenuation exceeds 10 dB, the R&S FSH3
outputs a warning indicating that the cable attenuation
is too high. It also indicates the maximum
recommended cable length for obtaining accurate
results.
Pressing CONTINUE accepts the entry.
Note: The cable length should be entered before the test setup is calibrated. If it is entered
afterwards, the measurement accuracy is reduced.
Calibrating the test setup:
The test setup must be calibrated before any measurements are performed. To perform calibration, a
SHORT is required at the output of the 1 m measurement cable. An OPEN can be used instead of a
SHORT. However, if an OPEN is used, greater measurement uncertainties must be expected as an
OPEN is not defined as precisely as a SHORT.
Note: The reference plane must be the output of the 1 m measurement cable; i.e. the
measurement cable may not be dispensed with. If the output of the VSWR bridge is used
as the reference plane, the DTF results are useless.
¾ Press the DTF CAL softkey.
The R&S FSH3 opens a text window which prompts
the user to terminate the measurement cable with a
SHORT.
¾ Firmly screw the SHORT to the output end of the
measurement cable.
¾ Press the CONTINUE softkey to start the SHORT
calibration.
¾ Calibration can be aborted by pressing CANCEL.
While SHORT calibration is in progress, the
R&S FSH3 outputs the message "Calibrating SHORT,
please wait...".
Calibration can be aborted with the CANCEL softkey.
1145.5973.12 4.69 E-6
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