Keysight Technologies N9321C, User Manual

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Functions and Measurements
Measuring Multiple Signals
34
Measuring Multiple Signals
This section provides the information on how to measure multiple
signals.
Comparing Signals on the Same Screen Using Marker
Delta
The delta marker function allows the user to compare two signals
when both appear on the screen at the same time.
In the following example, harmonics of the 10 MHz reference signal
available are used to measure frequency and amplitude differences
between two signals on the same screen. Delta marker is used to
demonstrate this comparison.
1 Preset the analyzer:
Press
Preset
(With
Preset Type
of
DFT
)
2 Connect the rear panel
REF OUT
to the front panel
RF IN
.
3 Set the analyzer center frequency, span and reference level to view
the 10 MHz signal and its harmonics up to 50 MHz:
Press
Frequency > 30 > MHz
Press
Span > 50 > MHz
Press
Amplitude > 10 > dBm
4 Place a marker at the highest peak on the display (10 MHz):
Press
Peak Search
The marker should be on the 10 MHz reference signal. Use the
Next
Right Pk
and
Next Left Pk
softkeys to move the marker from peak to
peak.
5 Anchor the first marker and activate a second marker:
Press
Marker > Mode > Delta
The label on the first marker now reads
1R
, indicating that it is
marking the reference point.