VIAVI TestCenter : Why the High Resolution Sampling Interval does not show the resolution as configured?
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VIAVI TestCenter : Why the High Resolution Sampling Interval does not show the resolution as configured?
Some modules have the results used in HRS written from the FPGA to "external" memory. This is called a "Maintenance Cycle Interval" (MCI). If the sampling interval is shorter that the MCI, the same value will be read out again. So you want to use a sampling interval greater than the MCI.
Here is the MCI for various modules.