[DSP-10] U107 Voltages

[Bob Larkin]

Hello Yamamoto,

Congratulations on getting your DSP-10 together and close to working!

I checked my DSP-10 using Lyle's DSPx + DSP-10 interface board, and the 
pattern for the RF gain was correct.  I am trying to imagine what would 
cause the pattern that you are seeing.  It would seem that there is an 
extra Ser_Clk clock pulse coming from somewhere. Most places that would 
cause the extra pulse would do it for each of the clock pulses, not one.

What voltages do you see on U108 QA to QH?  In receive, I believe only QC 
(U108-2) should be 5V and the others 0V.  What success are you seeing with 
programming the  PLL frequency synthesizers?

73,
Bob Larkin  W7PUA

At 03:33 AM 2/22/2004, you wrote:
>Hello,
>
>I am now doing an initial testing for my DSP-10 with kDSP-10 module. At
>the point of D2-A1 and D1-A1's values I got 0.0V and 0.48V
>respectively. So I decided to go to "Serial Bus Diagnostics" page by
>Bob to see if the U107 shift register is working properly. By using
>with the udiag1.exe, I confirmed that all the four lines are correct.
>And I proceed with running UHFA.EXE to get my own U107 Voltage table
>for each RF gain. Here is the voltages measured;
>
>RF Gain QA QB QC QD QE QF QG QH
>   100   0  0  0  0  5  0  0  0 Volts
>   94    0  0  0  04.9  0  04.7
>   88    0  0  0  0  5  0  5  0
>   82    0  0  0  0  5  5  0  0
>   76    0  0  04.7  0  5  0  0
>   70    0  0  5  0  0  5  0  0
>   64    0  5  0  0  0  5  0  0
>
>and the normal voltages from the web page are;
>
>RF Gain QA QB QC QD QE QF QG QH
>   100   0  0  0  5  0  0  0  5 Volts
>   94    0  0  0  5  0  0  5  0
>   88    0  0  0  5  0  5  0  0
>   82    0  0  0  5  5  0  0  0
>   76    0  0  5  0  5  0  0  0
>   70    0  5  0  0  5  0  0  0
>   64    5  0  0  0  5  0  0  0
>
>Interestingly the pattern in each table seems to be same excerpt for my
>values being "shifted" to the right in one column??? I don't know how I
>can explain this... Any help will be appreciated.
>
>Regards,
>Yamamoto Jiro, JQ2LMG
>
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