R&S FSH
Measurements on CW Signals
1145.5973.12 2.11
E-14
Measurement of Return Loss
(Only for R&S FSH with tracking generator)
For reflection measurements, the VSWR Bridge and Power Divider R&S FSH-Z2 or R&S FSH-Z3 and a
short standard (supplied with the R&S FSH-Z2) are needed. The R&S FSH-Z2 or R&S FSH-Z3 is
screw-connected to the RF input connector and the generator’s output.
R&S FSH with VSWR Bridge R&S FSH-Z3
VSWR Bridge
and
Power Divider
R&S FSH-Z2
Test port
Control
cable
R&S FSH with VSWR Bridge
R&S FSH-Z2
Connect the control cable of the R&S FSH-Z2/-Z3 to the power sensor connector of the R&S FSH.
Connect the RF and generator port of the R&S FSH-Z2/-Z3 to the RF input and generator output of
the R&S FSH.
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.
Press the MEAS key.
Press the MEASURE softkey.
Using the cursor keys or the rotary knob, select TRACKING GEN from the menu and confirm with the
ENTER key or the MEAS softkey.
The R&S FSH switches on the tracking generator and calls up its softkey menu. Since no calibration
has been performed, Track Gen Uncal appears in the upper right-hand corner of the measurement
diagram.
Before performing calibration, set the required span because calibration is valid only for the calibrated
span. Changing the frequency settings after calibration invalidates calibration.
Press the FREQ key.
Using the numeric keys, enter the center frequency.
Press the SPAN key.
Using the numeric keys, enter the span.
Alternately, the start and stop frequency can be input using the START and STOP softkeys in the
frequency menu.
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com
