[time-nuts] 3.0GHz Channel 3 installation in Agilent 53132A Counter
brooke at pacific.net
Wed Mar 19 18:23:18 EDT 2014
I've seen a similar problem when one end of a ribbon cable connector is soldered to the wrong side of a PCB.
Maybe you can unsolder a connector and install it on the other side?
James Robbins wrote:
> I think I may need to clarify my prior posting.
> Both old and new Channel 3 boards work fine (and read correctly) in my older 53132A counter.
> Both old and new Channel 3 boards fail to work properly in (and read 4x actual) the newer 53132A counter.
> So I think the problem is in the newer main 53132A box.
> As far as my understanding of the division ratios, I understand my error now. Thank you Dave (and some others).
> I have done some further testing and discovered one of HP/Agilent's little tricks. The main counter board channel 3 ribbon cable socket pin numbering does not conform to the channel 3 board ribbon cable socket numbering (they are crisscrossed). (I can supply the shifted numbers if anyone is interested.)
> However, my search for suspected unwanted zero ohm resistors left in the new box (to set the counter up for a 5 or 12.5GHz channel 3) has resulted in no joy and only a large headache and sore eyes:(
> Thanks everyone for trying to help here. It was supposed to be a "plug and play" addition to my counter. So much for the plan.
> Jim Robbins
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