Cable and Antenna Test Mode
R&S
®
Cable Rider ZPH
117
User Manual 1321.0950.02 ─ 03
1. Press the "DTF CONFIG" key.
2. Select the "DTF List Threshold" softkey.
The R&S Cable Rider ZPH opens a submenu to specify the threshold in dB.
3. Enter the threshold you require.
The R&S Cable Rider ZPH now only shows the peaks that are above the level you
have entered.
DTF Meas Overview
The DTF Meas Overview provides a menu overview to configure and set up a DTF
measurement.
For more information, see
Chapter 4.1.4.1, "Configuration Overview"
7.2.2 Configuring the Horizontal Axis
The FREQ/DIST key contains all necessary functions to define the frequency and dis-
tance parameters when performing cable measurements. The contents of the menu
depend on the currently selected measurement.
Dedicated DTF frequency
The "Dedicated DTF Frequency" menu item defines whether the frequency (DTF Start
Freq, DTF Stop Freq, DTF Center Freq, DTF Span) settings in DTF measurement are
coupled to frequency (Start, Stop, Center, Span) settings in other measurements in
CAT mode. When set "Off", the frequency (start, stop, span) settings are coupled
across all measurements in CAT mode.
See
"Setting a dedicated DTF frequency"
7.2.2.1
Setting the Frequency Range for DTF Measurements
In the default setting, the R&S Cable Rider ZPH automatically selects a center fre-
quency of 1 GHz and a distance of 50 m. The R&S Cable Rider ZPH optimizes the set-
tings for the best resolution, if you change the stop distance.
If you have to keep the current frequency settings, it is best to define a manual span.
Setting the frequency span
When setting the frequency range, it is best to first set the span and then the center
frequency.
There are three different span modes in the DTF measurement:
●
Manual
Setting for span is defined manually. However, the maximum span that can be set
depends on the maximum cable distance defined.
●
Auto
The best span is automatically calculated for the best length resolution.
Configuring Cable and Antenna Tests
