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5
Expanding Your Measurement Experience
Testing the Agilent 8663A Internal/External 10 MHz
5-22
E5500 Phase Noise Measurement System Version A.02.00
NOTE: If the center frequencies of the sources are not close enough
to create a beatnote within the capture range, the system will not be
able to complete its measurement.
The beatnote frequency is set by the relative frequency difference
between the two sources. If you have two very accurate sources set at
the same frequency, the resulting beatnote will be very close to 0 Hz.
Searching for the beatnote will require that you adjust the center
frequency of one of the sources above and below the frequency of the
other source until the beatnote appears on the oscilloscope's display.
See
Figure
5-20.
If incrementing the frequency of one of the sources does not produce
a beatnote, you will need to verify the presence of an output signal
from each source before proceeding.
Figure 5-20 Oscilloscope Display of a Beatnote out of the Agilent 70420A
Monitor Port
Document Part No. E5500-90024 Ed. 1.0
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