Measuring Multiple Signals; Comparing Signals On The Same Screen - Agilent Technologies N9340A User Manual

4 Making Measurements

Measuring Multiple Signals

This section provides information on measuring
multiple signals.

Comparing Signals on the Same Screen

A N9340A provides an easy function for you to
compare frequency and amplitude differences
between signals, such as radio or television signal
spectra. Using Delta Marker function allows you to
compare two signals when both appearing on the
screen at one time.
In this following example, a 10 MHz input signal is
used to measure frequency and amplitude
differences between two signals on the same
screen. Delta marker is used to demonstrate this
comparison.
1 Press [PRESET] to set the analyzer to a factory
default setting.
2 Input a signal (0 dB, 10 MHz) to the RF IN
connector of the analyzer.
3 Set the analyzer start frequency, stop frequency
and reference level to view the 10 MHz signal
and its harmonics up to 20 MHz:
•
•
•
4 Press [MARKER] > {Peak search} to place a marker
on the highest peak on the display (10 MHz).
The {Next Left PK} and {Next Right PK} softkeys are
available to move the marker from peak to peak.
5 Press [MARKER] > {Delta} to anchor the first
marker (labeled as 1) and activate a delta
marker:
The label on the first marker now reads 1R,
indicating that it is the reference point.
44
Press [FREQ] > {Start Freq} > 1 > {MHz}
Press [FREQ] > {Stop Freq} > 30 > {MHz}
Press [AMPTD] > {Ref Level} > 0 > {dBm}
N9340A User's Guide