[time-nuts] HP 3586A/B/C entirely referenced to 10MHz: A solution

[paul swed]

Have worked with Bert and also implemented the same DDS with a different
controller but essentially the same scheme. It is working very well. Used it
last night to monitor wwvb 60 Khz on the eastcoast.

Using spectrum lab could not detect and wondering of the received signal at
the 1 Hz and sub Hz level. There is a DDS offset that is fixed and
predicted.
The signal sounded very clean. No funny or odd sounds or intermod that my
ears or spectrum lab could display.

The very hardest part of the project was soldering the AD5932 TSOP onto an
adapter board to add real wires.

Regards
Paul
WB8TSL

On Mon, Mar 21, 2011 at 1:11 PM, Bert, VE2ZAZ <ve2zaz at yahoo.ca> wrote:

> Hello Everyone,
>
> I have spent the last few weeks modifying the HP 3586 Selective Level
> Meter. The
> intent was to modify the unit and reference the SSB product detector stage
> to
> the internal reference. This would make the entire SLM locked to the 10MHz
> reference, whether internal or externally fed.
>
> I have completed the modification with satisfactory results. I use a
> DDS-Based
> Function Generator 16-pin IC and a small 8-pin PIC micro.  For more detail,
> visit my website at http://ve2zaz.net/HP3586_AD5962/HP3586_AD5962.htm .
>
> This has been a very good exercise from a DDS perspective and I have
> learned a
> lot on the topic. I would be interested in hearing from those who proceed
> with
> the mod.
>
> Thanks,
>
> Bert, VE2ZAZ
>
>
>
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