R&S FSH3 Measurements on CW Signals
Measurement of Return Loss
(only for R&S FSH3 with tracking generator: order No. 1145.5850.13 or 1145.5850.23).
For reflection measurement the VSWR Bridge and Power Divider R&S FSH-Z2 and a Short standard
(supplied with the R&S FSH-Z2) are needed. The R&S FSH-Z2 is directly screwed to the RF input
connector and the generator’s output.
Test port
Control
cable
VSWR Bridge and
Power Divider
R&S FSH-Z2
¾ Connect the control cable of the R&S FSH-Z2 to the Power Sensor connector of the R&S FSH3.
¾ Connect the RF and Generator port of the R&S FSH-Z2 to the RF input and generator output of the
R&S FSH3.
The test setup must be calibrated before any measurements are made. This is done with a short and an
open at the point were the reflection measurement is to be made. If a cable is to be inserted between
the DUT and the bridge, perform the calibration at the measurement end of the cable.
¾ Press the MEAS key.
¾ Press the MEASURE softkey.
¾ Using the Cursor keys or the Rotary knob, select the TRACKING GEN menu item and confirm your
selection with the ENTER key or the MEAS softkey.
The R&S FSH3 turns on the tracking generator and switches to its softkey menu.
When the tracking generator is switched on, the R&S FSH3 displays Track Gen Uncal . This indicates
that tracking generator measurements are uncalibrated.
Before calibration, the frequency range you want should be set because calibration is only valid for the
calibrated frequency range. Changing the frequency settings after calibration invalidates calibration.
¾ Press the FREQ key.
¾ Using the number keys enter the Center Frequency.
¾ Press the SPAN key.
¾ Using the number keys, enter the span.
Alternately the Start and Stop Frequency can be input using the START and STOP softkey in the
frequency menu.
1145.5973.12 2.11 E-6
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