Spectrum Analyzer Mode
R&S
®
Cable Rider ZPH
186
User Manual 1321.0950.02 ─ 07
4. Select the desired channel input field to change the limit.
5. Enter the limit value you need.
6. Select the channel checkbox to activate the channel limit.
7. Select "Done" to apply the changes.
The R&S Cable Rider ZPH applies the limit checks on the ACLR measurement.
8. To deactivate the limit check for a specific channel, select the desired channel
checkbox to deactivate it.
Performing a limit check
1. Select the "Channel Settings" softkey.
The R&S Cable Rider ZPH opens a submenu to select the channel settings.
2. Select the checkbox for "Check Channel Limits" menu item.
The R&S Cable Rider ZPH automatically performs limit checks.
The results of the limit check are displayed in the
Screen Layout and Elements
. If a
result fails the limit check, the power level reading turns red and has an asterisk (*)
in front of its power level.
8.1.6
Measuring the Spectrum Emission Mask
The Spectrum Emission Mask (SEM) measurement is a method to detect spurious
emissions or intermodulation products of a signal. When performing a SEM measure-
ment, the R&S Cable Rider ZPH checks the signal against a spectral mask to see
whether the signal complies with a specific standard or not. Therefore, the R&S Cable
Rider ZPH provides predefined spectrum emission masks for various telecommunica-
tions standards.
However, you can define your own spectral masks with the R&S InstrumentView soft-
ware to perform measurements in frequency ranges other than the predefined ones. To
learn how to define Spectrum Emission Masks, refer to the R&S InstrumentView man-
ual.
1. Press the [MEAS] key.
Performing Spectrum Measurements
