[hpsdr] Gibratlar VCTCXO

[Phil Harman]

Hi Grant,

Thanks for the information on the latest generation of VCTCXOs - this looks 
like a really nice part. I've been doing some tests on various algorithms in 
an FPGA to lock my HP8640B to the 1PPS from a GPS receiver.  There seems to 
be plenty of options in terms of prior art but I started off with a very 
simple long term integration system. I started with a fast integration time 
and once in lock just keep on increasing the integration time.  For a KISS 
process it seems to work very well. I guess if this ever ends up as part of 
HPSDR since it's FPGA based then we can try many different algorithms over 
time.

I've been on the look out for a HP VCOCXO on ebay but have not had any luck 
as yet - may be better to try one of these VCTCXOs in the mean time.

It's good to see the interest and input to Gibraltar on the reflector.

73's Phil....VK6APH


----- Original Message ----- 
From: "Grant Hodgson" <grant at ghengineering.co.uk>
To: <hpsdr at hpsdr.org>
Sent: Friday, June 15, 2007 6:18 PM
Subject: [hpsdr] Gibratlar VCTCXO


> ***** High Performance Software Defined Radio Discussion List *****
>
> Rakon are developing a VCTCXO with a temperature stability of 0.14ppm
> over the range -20 - +70C.  Part number is IVT5300D (the 'V' means it is
> a VCTCXO, i.e. it can be pulled with an external voltage).


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