[DSP-10] PLL Tuneup Procedures

[Bob Larkin]

Hi Roger and DSP-10'ers,

Your diagnostic program and notes are a fine addition to the tools. It is
really helpful to have a variety of diagnostic tools available, since we
don't know what the problems might be.

I will add a link to your page from the PLL page.  Which reminds me, if
anyone has software/hardware material related to the DSP-10, let me know and
I will add a link to it.  If you need Internet storage for such material, I
can provide some, or if it is really big, we can find someone else that can!

Thanks again, Roger.

73,
Bob  W7PUA


At 10:42 PM 10/16/02 -0700, you wrote:
>Greetings Group:
>
>A while back, I asked the group if anyone had experimented with PLL 
>diagnostics.  Since then, I have done some work in this area that I 
>wanted to share.  This included an on-the-trail tutorial of PLLs by Wes, 
>W7ZOI (far better than "books on tape"), as well as some great 
>correspondence with Bob W7PUA on the procedures for computing 
>synthesizer coefficients for U104.
>
>I wrote a program (udiag3) to sweep the 126 MHz PLL across the entire 4 
>MHz range, such that I could verify PLL lock in a test-bed, rather than 
>from the dsp-10 dos application.  I also had great luck in getting both 
>VCOs going by breaking the loop between PLL and VCO.  This turned the 
>lock procedure into a one-evening slam-dunk.
>
>Steve (N7HPR) has been hounding me to post this stuff, so here it is for 
>your consumption:
>
>    http://www.easystreet.com/~rhayward/dsp10/index.html
>
>Please feel free to send constructive feedback.  Remember, personal 
>feedback need-not be posted to the entire group :)  Thanks again to Wes 
>& Bob for their fantastic mentoring skills.
>
>Regards / 72.
>
>    Roger ARS KA7EXM
>
>
>
>
>
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