User`s guide
32 N9320A Spectrum Analyzer
3 Functions and Measurements
Comparing Signals not on the Same Screen
Using Marker Delta
The analyzer will compare the frequency and amplitude
differences between two signals which are not displayed on
the screen at the same time. (This technique is useful for
harmonic distortion tests.)
In this example, the analyzer’s 10 MHz signal is used to
measure frequency and amplitude differences between a
signal on screen, and another signal off screen. Delta marker
is used to demonstrate this comparison.
1 Preset the analyzer:
Press > Preset (With Preset Type set to Factory)
2 Connect the rear panel REF OUT to the front panel RF IN.
3 Set the center frequency, span and reference level to view
only the 50 MHz signal:
Press > Center Freq > 50 > MHz
Press > Span > 25 > MHz
Press > Ref Level > 10 > dBm
4 Place a marker on the 50 MHz peak and then set the center
frequency step size equal to the marker frequency (10 MHz):
Press
Press
> Mkr -> CF Step
5 Activate the marker delta function:
Press
> Delta > Delta (On)
6 Increase the center frequency by 10 MHz:
Press > Center Freq,
The first marker moves to the left edge of the screen, at the
amplitude of the first signal peak.
Preset/
System
Frequency
SPAN
Amplitude
Peak
Search
Marker
Marker
Frequency
F
M