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Capture Bandwidth questions

When the capture bandwidth is over 76.499M all the IQ returned is empty, even we set it to 76.4999M.

What's the reason?

The bandwidth should be over 80 MHz as forum discussed?

The IQ rate is usually 50% higher than the selected IQ frequency span to reduce the amount of filter induced errors due to downsampling.

The effective IQ sample rate cannot exceed the device sample rate and is thus limited.

Selecting a span frequency greater than 83% of the receiver clock results in no IQ data in RTSA version up to 8942 .

Starting with version 8948 this sanity check has been removed from the dll.