Spectrum Analyzer Mode
R&S
®
Cable Rider ZPH
173
User Manual 1321.0950.02 ─ 07
6 = Occupied bandwidth graphical (blue lines)
7 =
Parameter view
8 =
Configuration overview
9 = Occupied bandwidth measurement softkey menu
8.1.3.1
Selecting a Standard
If you need to perform measurements that are conformed to a telecommunications
standard, you can activate one of the predefined standards that are already stored in
the R&S Cable Rider ZPH memory. However, you can also use the R&S Instrument-
View to create new configurations to perform measurements on other standards as
well. For more information on creating new configurations, see "Using Standards "in
the R&S InstrumentView.
1. Press the [MEAS] key.
2. Select the "Standard" softkey.
The R&S Cable Rider ZPH opens the "File Manager" dialog to select the standard.
3. Select one of the available standards.
4. Confirm the selection with the "Load" softkey.
The R&S Cable Rider ZPH loads the configuration of the selected standard. It
automatically sets the optimal span, resolution bandwidth, video bandwidth, sweep
time and detector for the standard.
You can create and edit standards with the R&S InstrumentView and transfer them to
the R&S Cable Rider ZPH via the USB or the LAN interface. The number of standards
the R&S Cable Rider ZPH can store in its memory depends on the number of other
data sets stored on the R&S Cable Rider ZPH.
For more information , see the
Chapter 5.9, "Managing Datasets"
,
on page 107.
If you make changes to the settings or create datasets, note that:
●
The span is always coupled to the channel bandwidth. Changes to either of those
automatically adjust the other (= 5 x channel bandwidth).
●
The resolution bandwidth should be between 1 % and 4 % of the channel band-
width. This ensures that the occupied bandwidth is measured with high accuracy.
●
The video bandwidth must be at least three times the resolution bandwidth. This
prevents incorrect results due to the compression of signal peaks by the video fil-
ter.
●
You use the RMS detector if possible. This ensures that the power measurement is
always correct irrespective of the waveform being investigated.
●
The sweep time must be set so that the result is stable. If you increase the sweep
time, the R&S Cable Rider ZPH also increases the integration time for the RMS
detector and thus ensures more stable measured values.
Performing Spectrum Measurements
