[time-nuts] Thunderbolt Harmonics

Artek Manuals Manuals at ArtekManuals.com
Wed Jan 18 07:33:18 EST 2017


R

Is what your seeing a harmonic (2nd? 3rd?) or a spur i.e what frequency 
is the "harmonic" ?

How are you measuring this ? (Spectrum analyzer ? make/model?)

More importantly and at the risk of displaying my naivety, what is the 
application that you are using the 10MHz source to feed and why if this 
harmonic is 60db down (or even only 40db down, the quoted spec) why 
would one care? What is the predicted error you will get in your 
application as a result?

Dave

manuals at artekmanuals.com


>> On Jan 17, 2017, at 9:40 PM, Rhys D <heyrhys at gmail.com> wrote:
>>
>> Hi all,
>>
>> Before I start, let me say I'm rather a newbie at this sort of stuff so
>> please be gentle.
>>
>> I was looking at the output of my Trimble Thunderbolt GPSDO and was rather
>> surprised to see really "loud" harmonics in there. ~ 60dB down from the
>> 10Mhz signal.
>>
>> Can anyone here shed some light on what I am seeing here?
>> Surely this isn't what it is supposed to look like? Should I be trying to
>> filter these before going to my distribution amplifier?
>>
>> Thanks for any light you can shed.
>>
>> R
>>
>>
>> ‚Äč
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-- 
Dave
Manuals at ArtekManuals.com
www.ArtekManuals.com


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