[time-nuts] retry: PRS10 has spurious frequencies

Brooke Clarke brooke at pacific.net
Tue Apr 24 17:54:19 EDT 2007


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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