User`s guide

32 N9320A Spectrum Analyzer

3 Functions and Measurements

Comparing Signals not on the Same Screen

Using Marker Delta

The analyzer helps you to compare the frequency and

amplitude difference between two signals which are not on

the same screen. (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 one

signal on screen and one 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 10 MHz peak and then set the center

frequency step size equal to the marker frequency (10 MHz):

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

Marker

Frequency