[time-nuts] HP-3586B SSB L.O. Mods...

[Bob Camp]

Hi

I forget exactly which programs do which, but there are some free spectrum analysis programs that will get you way into the sub-Hz resolution with an <=8 KHz sample rate. 

Bob


On Mar 21, 2011, at 5:44 PM, paul swed wrote:

> It can actually be calculated and it is in Berts tables.
> But last night I used spectrum lab and and could see the difference between
> usb worse case.5 Hz and LSB .3Hz. It was very stable no drifting at all
> while tuned to wwvb. But spectrum lab was not really optimized to give me
> better detail. Sub Hz res. Need to figure out how you would do that actually
> and maybe you simply can't.
> Regards
> Paul
> WB8TSL
> 
> On Mon, Mar 21, 2011 at 5:29 PM, Burt I. Weiner <biwa at att.net> wrote:
> 
>> Bert,
>> 
>> This looks very interesting.  Have you been able to determine the actual
>> error between the receiver's "tuned to" frequency and the 1850.000.00 Hz
>> audio tone error out of the receivers audio for upper and lower SSB?  This
>> could make a good group project kit.
>> 
>> Burt, K6OQK
>> 
>> 
>> Date: Mon, 21 Mar 2011 10:11:04 -0700 (PDT)
>>> From: "Bert, VE2ZAZ" <ve2zaz at yahoo.ca>
>>> To: time-nuts at febo.com
>>> Subject: Re: [time-nuts] HP 3586A/B/C entirely referenced to 10MHz: A
>>>       solution
>>> Message-ID: <258386.19056.qm at web112008.mail.gq1.yahoo.com>
>>> Content-Type: text/plain; charset=us-ascii
>>> 
>>> 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
>>> 
>> 
>> Burt I. Weiner Associates
>> Broadcast Technical Services
>> Glendale, California  U.S.A.
>> biwa at att.net
>> www.biwa.cc
>> K6OQK
>> 
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