[DSP-10] KDSP10 Info

Wed, 21 May 2003 18:57:40 -0400

         More info... udiag1 will not run, udiag2 will not run..
         Data clock and ena leads are toggling on main 12x.00 pll. output 
of DO pin is high rail constantly, vco sitting at 129.0 mhz with 5v railed 
on control line

         PLL LMX1501a is not accepting the programming it is sent..
         Clock is sloppy with long arcing sweep up on leading edge ... is 
this normal????
         I tried adding pull-up to clock, and it did clean up transition, 
but no lock either...

         DO output never ever changes.... u107 is getting serial enable 
pulses, data is going to pll chip, enable toggles on pll... but not 
accepting load...

Doug


At 06:03 PM 5/21/2003 -0400, you wrote:
>         That all looks in order to me... This flaky problem cropped up 
> back when I originally built it, and it had something to do with loading 
> timing...I swapped the 74HC575's back then, and the problem went away for 
> the most part, unless I did fast large freq changes....It  seems more 
> like a timing type problem. I was suggested to check the diagnostics 
> programs which I will do, but that proved fruitless last time as it was 
> not a wiring or assy problem, but something more elusive...
>         I never really did positively ID the culprit, but I may start 
> replacing chips and parts on this if I cannot get it to play nice..
>
>Doug KB8GVQ
>
>
>
>At 02:18 PM 5/21/2003 -0700, you wrote:
>>Hello Doug!
>>
>> > ... I do the ez fast load of uhf3 and lights stop
>> > flashing, and 1 led is locked on. The other out.. last line says
>> > origin of
>> > 0000 which does not look quit right....
>>
>>If you can try it as an audio processor, that might help verify that it is
>>loading and running the executable OK.  I just loaded mine that way and it
>>also starts at "0000" when ezfast executes the "G" part of the command line.
>>
>> >          I then load uhfa  and it comes up, loads pointers, gets
>>
>>
>>That suggests that the executable is in fact working or it wouldn't load the
>>pointers.
>>
>> > going and
>> > comes up with that dreaded "30 pll unlock" which plagued me
>> > during original
>> > startup of dsp-10 way back when..I do not know if an absolute fix
>> > was ever
>> > found, but as I recall I swapped chips around or something to get
>> > it going..
>>
>>I'll have to defer to others on the PLL interface.
>>
>>-Lyle
>
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