NARDA IDA, Operating Manual, Page: 175 / 292

8.3 Comparing spectra (Delta Spectrum)
Narda IDA - 3106
167
8.3.1 Using a spectrum as reference
1.
Set the spectrum display as required. The trace type that you want to
select as reference must be displayed.
2.
In the Spectrum main menu, press the
Trace
softkey.

The
Trace
window opens and the
Set as Reference
softkey is
shown in the lower bar.
3.
Press the
Set as Reference
softkey.

The previous window,Trace, now shows the trace types that can be
selected as reference:
Figure 39: Selection of a trace type for saving the reference spectrum.
4.
Select a trace type using the rotary control knob and press
OK
to set it.

The reference spectrum is shown as another trace and listed under
the list of trace types on the right of the screen. It can be shown or
hidden just like the trace types using the
Trace
softkey in the main
menu.
To use the reference spectrum:

Press the Delta Spectrum softkey in the
Measurement
menu (the
softkey is highlighted in color when the function is activated).

All the displayed spectra are shown relative to the reference
spectrum.