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Re: [TenTec] TXCO unit

To: tentec@contesting.com
Subject: Re: [TenTec] TXCO unit
From: Ken Brown <ken.d.brown@verizon.net>
Reply-to: tentec@contesting.com
Date: Fri, 12 Nov 2004 12:34:22 -1000
List-post: <mailto:tentec@contesting.com>
Chuck (Jack) Hawley wrote:

Also I wonder if the band oscillators are going to vary
that much anyway...negating any better stability from the TCXO. The BFO
oscillators are fairly stable. I have them adjusted to within a couple of
hertz and they stay where I put them.

From my Omni VI manual, section 4-9 "... A PLL circuit on the Logic board compares this signal to a precision reference frequency and sends a d.c. correction voltage back to the oscillator via....... ...always locked to a precision reference....."

So the "band switching oscillators" are as stable and accurate as the TCXO or ovenized oscillator. The BFOs do not have this type of setup, and can be a source of instability or inaccuracy even if your reference oscillator is locked to WWV's cesium standards.


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