VXI VT1433B manual Base Sample Rates, ADC ÷5

Models: VT1433B

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Base Sample Rates

VT1433B User's Guide

Using the VT1433B

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-five 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 a VT1433B 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

÷5

zero or

one time

÷2

zero or

sixteen times

Figure 3-6: Decimation filter diagram - baseband

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Page 55
Image 55
VXI VT1433B manual Base Sample Rates, ADC ÷5