[time-nuts] HP3325B as LO for a transceiver or receiver? Phase noise?

Chris Wilson chris at chriswilson.tv
Fri Jan 4 19:40:37 UTC 2019


Hello all

 Tuesday, January 1, 2019

Thanks  very much for all the replies and the helpful links. I guess I
should  just  try  and see then!  I much appreciate the trouble people
have   gone  to  explaining  this  although  I  do  not  have  a  full
comprehension of measuring phase noise yet ;) Happy New Year!
 


Best regards,
 Chris        mailto:chris at chriswilson.tv


MG> I have done a study of how good it needs to be on my website:

MG> https://sites.google.com/site/markstcxomeasurements/

MG> Regards,

MG> Mark


MG> On Tue, Jan 1, 2019 at 2:34 PM Artek Manuals <Manuals at artekmanuals.com>
MG> wrote:

>> The question that remains begging here from the original post (maybe off
>> topic ?) is how low a phase noise does he really NEED in this
>> application? We here at time-nuts tend to think in the 10e-12 minutia
>> area, but In this application ( a HF Communications receiver) the 3325B
>> may be "good enough" that PN wont really be an issue as a practical
>> matter. Don't see who the original poster is from this snippet but a
>> possible better place to get a "practical" answer might be over on the
>> EEVBlog?
>>
>> Dave
>> manuals at artekmanuals.com
>>
>>
>> On 1/1/2019 3:38 PM, Brooke Clarke wrote:
>> > Hi Chris:
>> >
>> > The HP 8648 Signal Generator was developed to have low phase noise
>> > that was needed for testing pagers.
>> > See second table of SSB Phase Noise at:
>> > https://prc68.com/I/HP8648.shtml
>> >
>> > --
>> > Have Fun,
>> >
>> > Brooke Clarke
>> > https://www.PRC68.com
>> > http://www.end2partygovernment.com/2012Issues.html
>> > axioms:
>> > 1. The extent to which you can fix or improve something will be
>> > limited by how well you understand how it works.
>> > 2. Everybody, with no exceptions, holds false beliefs.
>> >
>> > -------- Original Message --------
>> >>
>> >>    01/01/2019 14:22
>> >>
>> >> Could I use my HP3325B locked to a Trimble Thunderbolt GPS disciplined
>> >> 10MHz oscillator as the master LO of my Kenwood TS-590S transceiver
>> >> that has a LO at 15.6 MHz, or is the phase noise too great? My VK3HZ
>> >> gps disciplened LO replacement died recently, I may be able to repair
>> >> it but as they are no longer available I am looking at alternatives to
>> >> achieve a very stable frequency. Thanks
>> >>
>> >> https://www.febo.com/pages/hp3325b/
>> >>
>> >> http://www.vk3hz.net/XRef/XRef_Home.html
>> >>
>>
>> --
>> Dave
>> Manuals at ArtekManuals.com
>> www.ArtekManuals.com
>>
>>
>> ---
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>>
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