We're talking about extreme precision here, but in somecases, it might be
needed for MARS. I am not a member of MARS, soI am not privy to their current
frequency tolerance requirements.But, at 1PPM, we're talking 10Hz at 10MHz.
I'm running a Trimble Thunderbolt GPSDO, and according to LadyHeather, I see a
10000 tau accuracy of 10 to the minus 13. Is thatextreme? Perhaps, for normal
amateur use, but I think that it wouldprovide a decent "safety" margin for a
MARS operator who needsto meet a certain frequency tolerance on a repeatable
basis withno notice - i.e. instantly QSY to another frequency as needed,
withoutworrying about how long it's been since the last formal calibration.
(And, to be even more inane, the correct abbreviation is "MHz." -capital M for
Mega, capital H/lower case Z for Hertz, since it's aunit named for a person,
and is therefore capitalized. Lower caseM is for milli, which in this case
might describe how far off thedesired frequency a signal might be if it were
sync'ed to an externalsource with the degree of accuracy under discussion
here...)
I have a K3 with both the optional TCXO and the K3EXREF.
Just my 20 millidollars' worth,
N1HO
From: Wes (N7WS) <[email protected]>
To: [email protected]
Sent: Monday, November 2, 2015 6:04 PM
Subject: Re: [Elecraft] 10 mHZ external reference VS the K3S's optionalKTCXO3-1
Precisely or more accurately, accurate!
This pastime is no more inane than contesting or working QRP.
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