Cable and Antenna Test Mode
R&S
®
ZNH
131
User Manual 1334.5985.02 ─ 02
3. Enter the reference level you require or move the reference level with rotary knob.
The R&S
ZNH 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
ZNH displays and, e.g. include signal parts that are outside the displayed screen
area. The position of the reference value and the trace does not change.
1. Press the [SCALE/AMPT] key.
2. Select the "Range" softkey.
The R&S
ZNH opens an input field to specify the range setting.
3. Enter the range you require.
The R&S
ZNH adjust the vertical axis accordingly.
7.2.3.3
Adjusting the Vertical Axis Automatically
The R&S
ZNH provides an automatic scaling algorithm to optimize the results display.
The R&S
ZNH does this by determining the minimum and maximum trace values and
adjust the vertical axis according to these values.
1. Press the [SCALE/AMPT] key.
2. Select the "Auto Scale" softkey.
The R&S
ZNH performs the automatic adjustment of the vertical axis.
7.2.3.4
Setting the Reference Position
The reference position defines the position of the reference line in the diagram. The
reference position is a linear value between "0" and "10". Each value represents one
horizontal grid line of the diagram. The "0" value corresponds to the top grid line and
the "10" corresponds to the bottom grid line.
When you change the reference position, the R&S
ZNH also shifts the position of the
trace by the magnitude of the reference position change. It has no effect on the refer-
ence value itself.
1. Press the [SCALE/AMPT] key.
2. Select the "Ref Position" menu item.
The R&S
ZNH opens an input field to specify the reference position.
3. Enter the reference position you require.
The R&S
ZNH moves the trace accordingly.
Configuring Cable and Antenna Tests
