[TenTec] Orion vs Orion II DSP Filters

pa5mw at home.nl pa5mw at home.nl
Thu Dec 13 02:18:48 EST 2018

Just to clarify something here;  because I like the 100Hz BW at fw 1.x
better than at 3.x does not mean the generation 3 fw is not good or
There is a world of differences between 1.x and 3.x

For putting things into perspective:

-  The mentioned "100Hz BW performance experience" is valid at my local
QRM/QRN/MM-noise situation
-  I use it on the low-bands , mainly 160m
- Any other support act (like V3 APF or any external digital/analog  APF)
does not do it for me

- Generation 3.x fw  a LOT of  bugs are solved
- Generation 3.x fw  offers small incremental upgrades on several smaller
- Generation 3.x fw  offers many new options like fully adjustable APF,
different S-meter-settings/ballistics and per S-unit adjustment table, etc.
- Generation 3.x fw  supports the RX-366 upgrade 2nd RX-unit
- Generation 3.x fw   holds all the good of 2.x and then some, check at :

Mark PA5MW

-----Original Message-----
From: TenTec <tentec-bounces at contesting.com> On Behalf Of Carl Moreschi
Sent: Thursday, December 13, 2018 3:56 AM
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: Re: [TenTec] Orion vs Orion II DSP Filters

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

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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