[time-nuts] retry: PRS10 has spurious frequencies

Brooke Clarke brooke at pacific.net
Tue Apr 24 18:12:15 EDT 2007


Hi:

Sorry.  That was a phase plot in the same folder on my computer.  Here's my 
spectrum plot.

Have Fun,

Brooke
http://www.PRC68.com
http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com



Brooke Clarke wrote:
> Hi Henk:
> 
> Here is a spectrum plot from my PRS10.  But it's also connected to the 
> SR620 so I'm not sure where the spurs are coming from.
> 
> Have Fun,
> 
> Brooke Clarke
> http://www.PRC68.com
> http://www.pacificsites.com/~brooke/PRC68COM.shtml
> http://www.precisionclock.com
> 
> 
> 
> Henk ten Pierick wrote:
> 
>> Hi Said,
>>
>> Thanks for the picture.
>> I have inserted a 100MHz lowpass between the PRS10 and the Wavecrest  
>> tot remove the spurious signals.
>> There is a large difference in phase noise close to the carrier as  
>> calculated by the Wavecrest.
>> It is unclear to me if the spurious is normal or not. The spurious of  
>> my PRS10 is 60dB down the 10MHz so it is strange that you see no  
>> spurious.
>>
>> Henk
>>
>>
>> ------------------------------------------------------------------------
>>
>>
>> On Apr 24, 2007, at 20:18, SAIDJACK at aol.com wrote:
>>
>>>
>>>
>>> In a message dated 4/23/2007 10:51:38 Pacific Daylight Time,
>>> henk at deriesp.demon.nl writes:
>>>
>>>> Your  picture's input level is 5dBm.
>>>> The SRS spec for PRS10 is 7dBm output.  Were is the difference?
>>>
>>>
>>>
>>>> Did you measure wideband spectrum of the  PRS10 output? Up to 1GHz?
>>>
>>>
>>>
>>>
>>>
>>>
>>> retry: the attachement was too big first time I tried sending this:
>>>
>>> Hi Henk,
>>>
>>> I measured my PRS-10 tonight on an 8563E, you can see the output  is  
>>> +6dBm.
>>>
>>> There are a bunch of spurs up to 200MHz, nothing noteworthy above  
>>> that,  I
>>> checked to 1GHz. See the attachement. Some of these spurs don't  look 
>>> like  they
>>> are harmonics, but it would take time to investigate all spurs.
>>>
>>> Hope this helps you,
>>> bye,
>>> Said
>>>
>>>
>>>
>>>
>>>
>>>
>>> ************************************** See what's free at http:// 
>>> www.aol.com.
>>> <prs10.jpg>
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>>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
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> 
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