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Chapter 1 25
Making Basic Measurements
Decreasing the Frequency Span Around the Signal
Figure 1-14 Detected Signal
8. Turn on the frequency tracking function by press FREQUENCY and
Signal Track and the signal will move to the center of the screen, if it
is not already positioned there. See figure Figure 1-15. (Note that
the marker must be on the signal before turning signal track on.)
Because the signal track function automatically maintains the
signal at the center of the screen, you can reduce the span quickly for
a closer look. If the signal drifts off of the screen as you decrease the
span, use a wider frequency span. (You can also use
Span Zoom, in
the
SPAN menu, as a quick way to perform the Peak Search,
FREQUENCY, Signal Track, SPAN key sequence.)
Figure 1-15 Signal with Signal Tracking On