HP 8-Channel 196 kSa/sec Digitizer plus DSP E1433A manual Adc, Base Sample Rates

HP E1433A User's Guide

Using the HP E1433A

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 E1433A 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 sixteen times.

ADC

	⎟ 5
			⎟
z e ro o r			2
		z e ro to
o n e tim e
		1 6 tim e s

Figure 3-6: Decimation filter diagram - baseband

3-17