R&S FSH Measuring the Carrier-to-Noise Ratio
1145.5973.12 4.59 E-11
Selecting the C/N result display
The R&S FSH either displays the carrier/noise power ratio referenced to the total noise channel power
C/N or referenced to the noise power density C/No. It calculates the noise power density from the set
noise channel bandwidth.
C/No = C/N + 10 lg (noise channel bandwidth)
Press the SELECT MEASURE softkey.
Using the rotary knob or the cursor keys, select the
desired result display and confirm your choice with
the ENTER key or the SELECT MEASURE softkey.
If the noise channel measurement is active, the
R&S FSH displays the measured C/N or C/No value.
C/N measurement result display
If the noise channel measurement is active, the R&S FSH inserts the C/N measurement result at the
bottom of the measurement diagram. Usually this does not obscure the trace. However, if the trace is in
this area of the screen, the display can be blanked out.
Switch off the C/N measurement result.
Press the NOISE MEASURE softkey.
Using the rotary knob or the cursor keys, select
DISPLAY OFF and confirm your choice with the
ENTER key or the F5 softkey.
Switch the C/N measurement result on again.
Press the NOISE MEASURE softkey.
Using the rotary knob or the cursor keys, select
DISPLAY ON and confirm your choice with the ENTER
key or the F5 softkey.
Note: Switching the C/N measurement result on or off also affects the insertion of the measured
value of the reference measurement.
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