59
Tracking Drifting Signals
Measuring a Source Frequency Drift
7 Turn on the signal tracking
function.
• Press SPAN X Scale,
Signal Track (On).
8 Reduce the span to
500 kHz.
• Press SPAN, 500, kHz. Notice that the signal is held in the
center of the display.
9 Turn off the signal track
function.
• Press SPAN X Scale,
Signal Track (Off).
10Measure the excursion of
the signal.
• Press Trace/Detector, Max
Hold.
As the signal varies, maximum hold
maintains the maximum responses of
the input signal.
Annotation in the Trace/Detector
panel, upper right corner of the screen,
indicates the trace mode. In this
example, the M in the Type row under
TRACE 1 indicates trace 1 is in
maximum-hold mode.
11 Activate trace 2. • Press Trace/Detector,
Select Trace, Trace (2).
Trace 1 remains in maximum hold
mode to show any drift in the signal.
12Change the mode to
continuous sweeping.
• Press Clear Write.
13 Slowly change the
frequency of the signal
generator ± 50 kHz in
1 kHz increments.
Your analyzer display should look
similar to Figure 5-1.
Step Action Notes
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