[hpsdr] High Accuracy Timing for HPSDR

[Leon Heller]

----- Original Message ----- 
From: "Lyle Johnson" <kk7p at wavecable.com>
To: "Robert McGwier" <rwmcgwier at comcast.net>
Cc: "'neil whiting'" <neil at g4brk.net>; <hpsdr at hpsdr.org>
Sent: Saturday, May 27, 2006 9:09 PM
Subject: Re: [hpsdr] High Accuracy Timing for HPSDR


> ***** High Performance Software Defined Radio Discussion List *****
>
>> ...I would prefer to use a source with no excursions if
>> I were going to lock an LO to use in a 47 GHz transverter, well then I
>> might care about these excursions. The 10 K pps signal, driving a
>> Gibraltar based reflock will be better than most TCXO's in HF
>> transceivers today and by a lot.
>
> Using the Valpey OCXO and a decent GPS (Trimble or Motorola?  Of the
> SiRF-based unit if it is real/available?), it would be nice to have a
> very stable 10 MHz signal suitable for slow speed PSK at S-band.  I know
> I won't be able to copy P5A at Mars, but while it is enroute it might be
> nice to try.  The 5 BPS rate at low microwaves makes phase stability a
> serious challenge :-)

I'm using u-blox GPS modules in a design for a client. I think they are used 
for military applications because of their performance.

73, Leon 

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