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Tracking
Unstable
Signals
Using
Marker
Track
and
the
Maximum
Hold
and
Minimum
Hold
Functions
The marker track function is useful for tracking unstable signals that drift
with time. The maximum hold and minimum hold functions are useful for
displaying modulated signals which appear unstable, but have an envelope
that contains the information-bearing portion of the signal.
MK TRACK
OM
OFF may be used to track these unstable signals. Use
[PEAK SEARCH) to place a marker on the highest signal on the display.
Pressing MK TRACK ON OFF (ON) will bring that signal to the center
frequency of the graticule and adjust the center frequency every sweep to
bring the selected signal back to the center. SPAN ZOOM is a quick way to
perform the [PEAK SEARCH),
[MKRFCTN_),
MK TRACK
OM
OFF , (SPAN) key
sequence.
Note that the primary function of the marker track function is to track
unstable signals, not to track a signal as the center frequency of the spectrum
analyzer is changed. If you choose to use the marker track function when
changing center frequency, check to ensure that the signal found by the
tracking function is the correct signal.
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