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Observing the Beatnote
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If the beatnote frequency is below 100 kHz it will appear on
the HP 3561A's display in both the frequency domain and
the time domain. If the beatnote does not appear on the
HP 3561A, then the beatnote is either greater than 100 kHz
or it does not exist.
If incrementing the frequency of one of the sources does not
produce a beatnote within 100 kHz, you will need to verify
the presence of an output signal from each source before
proceeding.
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PEAK TUNING RANGE [ H z ]
Figure 3-45. Graph of Phase Lock Loop Bandwidth
Provided by the Peak Tuning Range
3-160
Signal Source Applications
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