R&S FSH
Measurements on CW Signals
1145.5973.12 2.17
E-14
Calibration tip:
The R&S FSH performs calibration over its entire span. Therefore, recalibration is not necessary after
the cable length is changed. The calibration data is stored in the R&S FSH memory. Thus, the
calibration is valid after the operating mode is changed or after the instrument is switched off. For a
calibration to remain valid, the instrument temperature must not deviate more than 5°C. If the
temperature deviates more than this amount, the R&S FSH shows a red dot in front of the
•
DTF
display . A new calibration is then necessary.
Unscrew the short from the measurement cable.
Screw the cable under test to the measurement cable.
The R&S FSH displays the return loss produced in the cable under test versus the distance.
The R&S FSH can also list any cable faults. It displays the return loss and distance from the
measurement plane of all reflections that exceed a definable threshold.
Press the LIST VIEW softkey.
The R&S FSH opens the threshold value entry box and
also displays the threshold as a horizontal line across
the measurement diagram.
Set the threshold using the cursor keys (5 dB steps),
the rotary knob (1 dB steps) or the numeric keys.
Press the ENTER key or the LIST VIEW softkey
again.
The R&S FSH displays a table listing all the return
losses that are above the threshold, sorted according
to distance from the measurement plane.
To close the list and to return to the graphical
display mode, press the EXIT softkey.
The distance to the cable faults or the distance between any two faults can also be read out with the
marker.
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com
