Re: [TenTec] Orion Sub Receiver BW

[Lin Davis <linbdavis@earthlink.net>]

Interesting! I wonder if Ten-Tec did this to reduce the DSP workload thus 
increasing overall performance (i.e.. sweep, and user input response). If I 
understand correctly, if you cut the bandwidth that a DSP filter must contend 
with by 2, you cut the "work load" by four; the filter requires half the 
coefficients, and since the sampling rate can be cut in half as well, 
(decimation is the term), a factor of one-fourth results!
73,
Lin
WB1AIW

Rick Williams wrote:

> Based on Sinisa' suggestion I have replotted my AM received signals on both
> the Main and Sub receiver.  As he points out BOTH are limited with 2.056
> firmware to +/- 3 kHz.
>  
> As opposed to sweeping the bandwidth with a controlled source I have used an
> amateur QSO on 80 metre AM and a commercial AM station on the Sub receiver.
> (It was quick and easy that way.)
>  
>   http://www3.telus.net/ve7tk/Orion_Sub.pdf
>  
> AM is not a big issue for me so I have not gone back to V 1.xxx - I'll leave
> that to others.  Thanks for the interesting discussion.
>  
> 73,
> Rick
> VE7TK
>
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