[time-nuts] HP5372A CPU schematics

Magnus Danielson magnus at rubidium.dyndns.org
Wed Dec 29 17:06:07 EST 2010

On 12/29/2010 10:40 PM, Mark Sims wrote:
> I bought some spare 5372A CPU boards.  One of them failed the histogram hardware test.  Looking at the histogram/timing board schematic,  the only histogram specific chips on the CPU board seemed to be a decoder and a couple of buffers.  I replaced the decoder and the problem got worse with several more tests now failing.


> The ROMs are 5372-80032 .. 80039  	

Not matching mine. But I got Option 040 FFT option.

I've considered playing around with the Option 020 - Fast Port. Anyone 
done anything like it? I consider hooking up an FPGA board and then pull 
the data out that way.


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