[TenTec] Orion vs Orion II DSP Filters

[Carl Moreschi]

The roofing filters between the Orion and Orion II are physically 
different.  But the job of roofing filters is not critical for 
selectivity.  The roofing filters are for the 2 khz dynamic range.

The DSP filters are the same for the 2 radios if you are using version 2 
or later firmware.  The difference comes in for the Orion where you can 
run version 1 firmware.  In version 1 firmware, the DSP filters were 
designed by Doug Smith and these filters have different characteristics 
than the version 2 and later DSP filters designed by Gary Barber.

PA5MW has found that the Version 1 filters have less ringing at very 
tight bandwidths.  Just remember that version 1 firmware is not 
available for the Orion II.

I do remember for a while when version 2 came out a lot of people 
preferred version 1 firmware.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

On 12/12/2018 9:48 PM, Kim Elmore wrote:
> Based on what I read from N4PY and PA5MW, I'm confused about the
> difference between the DSP filters in the Orion and Orion II (I have the
> Orion II). Are the the most current firmware Orion filters essentially
> the same as the most current firmware Orion II filters? If different,
> can those difference be succinctly described?
>
> Kim N5OP
>
>
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