[TenTec] Orion Sub Receiver BW

[Lin Davis]

Thanks for the clarification.

Apparently I know enough to be dangerous ;)

Sinisa Hristov wrote:
> Lin Davis wrote:
> 
> 
>>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 workload is proportional to filter length (199 taps default),
> and not related directly to the bandwidth.
> 
> 
> 
>>the filter requires half the coefficients
> 
> 
> The number of coefficients is most dependent on the
> required filter slope, measured in dB/Hz. As the filter
> gets narrower, the tendency is for the number of
> coefficients to grow, with sampling rate unchanged.
> 
> 
> 
>>and since the sampling rate can be cut in half as well, (decimation is the term)
> 
> 
> My understanding is that Orion uses no BW-dependent decimation.
> 
> 
> 73,
> 
> Sinisa  YT1NT, VE3EA
> 
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