[time-nuts] timestamps on downconverted data streams

Jim Lux jimlux at earthlink.net
Sun Dec 20 17:42:17 EST 2015


On 12/20/15 12:17 PM, Bill Byrom wrote:
> Yes, you can do that. My employer (Tektronix) makes RF Signal Analyzers
> which sample at a high rate then use a DDC (Digital DownConverter based
> on decimation and digital filtering) to produce a much smaller output
> I/Q file at a smaller bandwidth and lower time resolution. The
> decimation and digital filtering delay acquired signals, so you have to
> correct for the group delay in these operations.
> -

and, how do they do that correction? Or, do they leave up to you to do it?




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