User`s guide

4 Making Measurements
42 N9340A User’s Guide
Measuring Multiple Signals
This section provides information on measuring
multiple signals.
Comparing Signals on the Same Screen
The N9340A can easily compare frequency and
amplitude signal differences. For example,
measuring radio or television signal spectra. The
Delta Marker function allows two signals to be
compared when both appear on the screen at the
same time.
In the following example, a 50 MHz input signal is
used to measure frequency and amplitude
differences between two signals on the same
screen. The Delta Marker function is demonstrated
in this example.
1 Press [PRESET] to set the analyzer to a factory
default setting.
2 Input a signal (0 dB, 50 MHz) to the RF IN
connector of the analyzer.
3 Set the analyzer start frequency, stop frequency
and reference level to view the 50 MHz signal
and its harmonics up to 100 MHz:
• Press [FREQ] > {Start Freq} > 40 > {MHz}
• Press [FREQ] > {Stop Freq} >110 > {MHz}
• Press [AMPTD] > {Ref Level} > 0 > {dBm}
4 Press [MARKER] > {Peak search} to place a marker
on the highest peak on the display (50 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 M1) and activate a delta
marker:
The label on the first marker now reads 1R,
indicating that it is the reference point.