[TangerineSDR] Simple question regarding time stamps

Phil Erickson phil.erickson at gmail.com
Tue Sep 22 11:12:38 EDT 2020

Hi all,

  Instead of searching through my cluttered inbox, I thought I'd ask a
question about time stamps in the PSWS architecture: are these stored as
floats/doubles or as integers?

  I ask because we at Haystack (specifically Ryan Volz) have just run into
yet another "doesn't port to architecture XXX" problem / regression test
failure with a time stamp stored as a double in a DigitalRF implementation
(on a RPi - 32 vs 64 bit), so I wanted to remind myself of what had been
decided here.  Our strong experience is that doing integer time stamps is
greatly preferred because it has much less risk and is more future-proof.
Digital RF for example uses integer ratios (M / N) for encoding of
fractional sample rates for this very reason.

  I'm sure this has been discussed already, so if someone can point me to
the particular place in the spec, that would be great.

Phil W1PJE

Phil Erickson
phil.erickson at gmail.com
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