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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