[evlatests] Typos in my last message

Rick Perley rperley at nrao.edu
Fri Jul 7 17:07:07 EDT 2006


    All:     

    A couple of typos appeared in my last message on the '8797 Birdie'.

    I've cleaned it up, below.

>    A number of tests have been done to elucidate the nature of this 
>birdie.  It's defnitely a weird one!
>
>    All test are in spectral line.  I give below the *center* frequency, 
>full BW, and apparently
>frequency of the birdie. 
>
>A)  8790/25 MHz.  The birdie appears at 8797.5 MHz
>
>B)  	8793/12.5 MHz.      The birdie is very weak, and appears at 8797.5
>      8796/12.5 MHz        The birdie is very strong, at 8797.5.
>      8799/12.5 MHz       The birdie is of moderate strength, but at 
>8795 MHz. 
>       All other frequencies attempted in this run (from 8790, 
>8803, 8806, 8809, and 8812 MHz) showed
>no birdies at all.  All of these were taken with 12.5 MHz BW.  
>
>  
>

>C)  8790/6, 8795/6, 8800/6, and 8805/6:  No birdie is seen in any of 
>these combinations. 
>
>    Obviously, the 'real' signal is not at any of the frequencies 
>listed.  So, where is it, and how is it
>getting in?
>
>
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>  
>




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