Cable and Antenna Test Mode
R&S
®
Cable Rider ZPH
121
User Manual 1321.0950.02 ─ 03
7.2.3 Configuring the Vertical Axis
The SCALE key contains menu on settings related to the level display.
7.2.3.1
Setting the reference value
The reference value defines the amplitude of the reference line. The R&S Cable Rider
ZPH indicates the position of the reference value with a white triangle at the vertical
axis.
When you change the reference value, the R&S Cable Rider ZPH adjusts the labels of
the vertical axis. Changing the reference value results a change in the vertical position
of the trace. It does not change the position of the reference line.
1. Press the SCALE key.
2. Select the "REF" softkey.
The R&S Cable Rider ZPH opens an input field to specify the reference level.
3. Enter the reference level you require or move the reference level with the rotary
knob.
The R&S Cable Rider ZPH sets up the display accordingly.
7.2.3.2
Defining the display range
The display range defines the scale of the vertical axis and therefore the amplitude
between the two horizontal grid lines. The unit depends on the measurement format.
When you change the display range, you can increase or decrease the amplitude the
R&S Cable Rider ZPH displays and, e.g. include signal parts that are outside the dis-
played screen area. The position of the reference value and the trace do not change.
Configuring Cable and Antenna Tests
