Cable and Antenna Test Mode
R&S
®
ZNH
135
User Manual 1334.5985.02 ─ 02
The R&S
ZNH provides a method to suppress signals resulting from interfering sour-
ces without affecting the accuracy of the actual measurement.
1. Press the [TRACE] key.
2. Select the "Smoothing" softkey.
The R&S
ZNH opens a submenu to select the trace mode.
3. Select the "Smoothing On" menu item.
When the suppression of interference is activated, the menu item for aperture set-
ting is available.
4. By default the "Aperture Auto" is used. To set it manually, select "Aperture Manual"
menu item.
The R&S
ZNH turns automatic aperture calculation off and opens an input field to
specify the aperture setting.
5. Set the aperture size according to your measurement.
When suppression of interference is activated, the R&S
ZNH looks for signals that
interfere with the measurement and suppresses them in the result display. Faults in the
system you are measuring, however, still displayed correctly.
7.3.1.3
Working with Memory Traces
The R&S
ZNH can transfer a trace to the trace memory and also display the current
trace and the trace in the trace memory for comparison. The saved trace is always dis-
played in a lighter yellow to distinguish it from the current trace. See
.
1. Press the [TRACE] key.
2. Select the "Trace
▶
Memory" softkey.
The R&S
ZNH transfers the trace to the trace memory.
3. Select the "Show Memory" softkey.
The R&S
ZNH displays the saved trace in lighter color.
You can remove the memory trace by pressing the "Show Memory" softkey again.
The memory traces are bit-mapped into the picture memory. Therefore, when the
memory trace is recalled, it will not be adapted to any modifications of the reference
level or span that may have been made in the meantime.
When you load a dataset, the R&S
ZNH stores the corresponding trace in the trace
memory. You can view that trace with the "Show Memory" softkey.
7.3.1.4
Using Trace Mathematics
Trace mathematics subtract the memory trace from the live trace and vice versa and
then display the results. After you transfer a trace to the trace memory, you can per-
form the trace mathematics function.
Analyzing Measurement Results