Setting and Using the Measurement Functions R&S FSH3
In the third step of calibration, terminate the
measurement port into a 50 Ω termination.
¾ Terminate the measurement input of the bridge or
the end of the measurement cable into a
50 Ω termination.
¾ Start termination calibration by pressing the first or
the second softkey (CONTINUE). During
calibration, the R&S FSH3 outputs the message
"Calibrating LOAD, please wait...".
When calibration is over, the R&S FSH3 outputs the
message "Reflect. calibrated" for three seconds.
Reflection (vect) is displayed in the top right-hand
corner of the diagram to indicate that the R&S FSH3 is
vector-calibrated for reflection measurements. The
softkey label REFLECT VECT CAL is highlighted in
green.
The reflection calibration remains valid until the center frequency or the span is changed on the
R&S FSH3. Track Gen Uncal is displayed in the top right-hand corner of the screen when calibration
is no longer valid.
If the reference level is changed (AMPT key, REF softkey) after calibration, greater measurement
uncertainty must be anticipated. The R&S FSH3 retains the calibration data but displays a red dot
before the • Reflection (vect) display in the top right-hand corner of the screen to indicate a possible
increase in measurement uncertainty.
A change in sweep time does not affect reflection measurement.
The R&S FSH3 internally monitors the temperature. If temperature changes cause an increase in
measurement error, the R&S FSH3 shows a red dot to the left of the measurement mode display
( • Reflection (vect) ).
1145.5973.12 4.64 E-6
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