Spectrum Analyzer Mode
R&S
®
Cable Rider ZPH
243
User Manual 1321.0950.02 ─ 07
1. Press the [MARKER] key.
2. Select the "Marker Function" softkey.
3. Select the "n dB Down" menu item.
The R&S Cable Rider ZPH displays two temporary markers on the left and on the
right of the reference marker, "M1". It also shows the bandwidth between the n dB
down markers. You can then adjust the distance of the temporary markers.
4. Select the "Marker Function" softkey.
5. Select the "n dB Down" menu item.
The R&S Cable Rider ZPH opens an input field.
6. Enter a different distance of 6 dB.
The R&S Cable Rider ZPH again shows the temporary markers, this time with a
broader bandwidth.
Demodulating Signals
The R&S Cable Rider ZPH features an AM and FM demodulator to demodulate and
monitor audio signals. It demodulates the signal at the marker frequency.
You can listen to the demodulated signal with the internal speaker or headphones that
you can connect to the 3.5 mm headphone jack on the top of the R&S Cable Rider
ZPH. See
Headphone jack
.
When demodulating an AM modulated signal, the R&S Cable Rider ZPH turns the
video voltage into an audible sound. You should therefore set the reference level to
about the level of the signal that you are demodulating.
If you perform measurements in the time domain, the R&S Cable Rider ZPH demodu-
lates continuously. In the frequency domain, you can define a time period the R&S
Configuring Spectrum Measurements
