[time-nuts] Problem with HP 83623A 20 GHz sweep generator stepping up/down 100 Hz when not wanted.

[n2lym]

Hi Bob,

I don't have issues at 60, 120, or 180Hz in a 60Hz country. Even with a 
500KV line a few thousand feet away. I can hear the corona on the ham 
bands at times.


Mike




On Thu, Dec 22, 2016 at 05:15 PM, Bob Camp wrote:

> Hi
>
>
> In a country with 50 Hz power lines, figuring out anything at 50, 100 
> or 150 Hz
> is going to be a bit exciting.
>
> Bob
>
>> On Dec 22, 2016, at 4:04 PM, n2lym  wrote:
>>
>> Dave,
>>
>> Look at it with a narrow band SA and see if it's modulated by 100Hz.
>>
>> 73,
>>
>> Mike N2LYM
>>
>>
>>
>>
>> On Thu, Dec 22, 2016 at 07:39 AM, Dr. David Kirkby (Kirkby Microwave 
>> Ltd) wrote:
>>
>>> On 22 December 2016 at 03:17, paul swed
>> wrote:
>>>
>>>> Dave Congratulations on 10 Ghz SSB.
>>>>
>>>
>>> This was not a QSO at all. It was simply a one way transmission from 
>>> a
>>> signal generator at my end to a receiver at his end. No QSO was 
>>> attempted.
>>>
>>>
>>>> Now to your question. I will fully believe you are seeing normal 
>>>> behavior
>>>> of the generators. Even if its dithering 100 Hz thats pretty 
>>>> amazing. Sweep
>>>> gens simply are not stable enough for narrow work like you are 
>>>> trying.
>>>> Now I am sure comments will prove me totally wrong.
>>>>
>>>
>>> But I find it a bit odd that HP would have a 1 Hz software option on 
>>> this
>>> instrument, if the instrument jumped up/down 100 Hz.
>>>
>>> Now I don't yet have the 1 Hz option programmed in, and it might 
>>> well
>>> change the behavior completely, but I'd still like to find a way, if 
>>> one
>>> exists, of checking this with the equipment I have.
>>>
>>> The signal generator is no longer supported, but I could try my luck 
>>> seeing
>>> if there are any known problems with this unit, or firmware upgrades
>>> available - currently revision 29, May 1991.
>>>
>>>
>>>
>>>> But I don't think so. (Have been on 10G SSB over the years also. 
>>>> Only 60
>>>> watts plus. Nothing fancy. ;-)  )
>>>> Regards
>>>> Paul
>>>> WB8TSL
>>>>
>>>
>>> 60 W is clearly some setup. I also know a lot of people run portable 
>>> stuff
>>> on 10 GHz, where achieving frequency stability is more of a 
>>> challenge,
>>> although less so with GPS. But this is a laboratory instrument, from 
>>> a
>>> reputable manufacturer. I personally would not expected this 
>>> behavior. I
>>> actually purchased this very cheaply (£650 GBP, which would have 
>>> been about
>>> $900 at the time), but they are not cheap to buy now.
>>>
>>>
>>> Dave
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to 
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to 
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>