HP VXI E1432A - Manual (Page 56)

Base Sample Rates
Baseband Measurement Spans
The table on the following page shows the measurement spans available for
base sample rates, for baseband measurements.
“Fs” is the sample frequency or sample rate. The value for zero
divide-by-two steps and no divide-by-5 step is the top measurement span
corresponding to the sample rate. This is with no decimation and using 400
lines to avoid alias. The other values on the table are for this top span
decimated by five and/or two.
For an HP E1432A which has option 1D4, the Arbitrary Source, the sample
rate for the source is automatically set to be the same as the sample rate
selected for the inputs. When the source is active the sample rate cannot
be greater than 65.536 kHz.
Decimation Filter Diagram
The drawing below illustrates the way the spans in the table are generated.
In the case of baseband spans (lower limit of span fixed at zero), the
frequency can (optionally) be divided by five and then (optionally) divided
by two up to eight times.
ADC
2
ч 5
ч
z e ro o r
z e ro to
8 tim e s
o n e tim e
Figure 3-12: Decimation filter diagram - baseband
HP E1432A User's Guide
Using the HP E1432A
3-17
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