[amsat-bb] Re: SDX transponder timing delay measurements?
rwmcgwier at comcast.net
Tue Sep 12 05:38:39 PDT 2006
I think it is about 35ms. It is not noticeable and especially with the
round trip time thrown in the mix, it will definitely not be
noticeable. The number will be important to us when we want to do ranging.
Steve Meuse wrote:
> Douglas Quagliana expunged (dquagliana at aol.com):
>> I know the design isn't even done yet, but has anyone
>> ever measured the time delay of an RF signal *through*
>> the (demo) version of SDX?
> There was a demo of the board at Dayton, I was lucky enough to get a demo while we were setting the booth up. The demo setup, if I remember correctly, was using two SDR-1000's. I didn't find the delay noticable at all. Propagation delay is much more of an issue for HEO.
> BTW, the SDX sounded FANTASTIC! I had goosbumps when N4HY tuned to the beacon :)
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
"You see, wire telegraph is a kind of a very, very long cat.
You pull his tail in New York and his head is meowing in Los
Angeles. Do you understand this? And radio operates exactly
the same way: you send signals here, they receive them there.
The only difference is that there is no cat." - Einstein
More information about the AMSAT-BB