[evlatests] Internal Birdie at 1408.25 MHz

Ken Sowinski ksowinsk at nrao.edu
Mon Jul 13 18:35:33 EDT 2009


On Mon, 13 Jul 2009, Ken Sowinski wrote:

> On Mon, 13 Jul 2009, Rick Perley wrote:
>
>>    We are seeing in recent tests the presence of a strong birdie,
>> centered at 1408.25 MHz.    The characteristics of this RFI strongly
>> indicate is is *NOT* of external origin:
>
> Here is some numerology ...

Rick just told me that Terry pointed out to him that 1408 is
the 11th harmonic of 128 MHz.  That seems a more likely origin
than what I wrote a few minutes ago.




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