[TenTec] Omni Vi and DSP

[Ken Brown]

Hi Bob,

Thanks for the input. Yes, I guess I forgot about the auto notch 
function on the Omni VI that is performed by the built-in AF DSP. Auto 
notch is pretty much useless for CW operation, so I never use it. I have 
all the filter slots filled in my Omni VI, so my options for improving 
my receive performance are: 1) better noise reduction before the 
receiver, using better receive antennas and or a noise cancelling unit 
such as the JPS ANC-4 or similar and 2) better AF DSP.... (or getting a 
different rig, but I don't feel like I'm done with the Omni VI yet, nor 
am I ready to put out the $$ for another rig)... I used a JPS NIR-12 
with my Kenwood TS-440SAT to great advantage. The Omni VI is a much 
better receiver, in a lot of ways; ie. narrower 1st IF filters, more 
choices of 2nd IF filters including a narrower one than the TS-440 had, 
lower phase noise, probably a better front end AND built-in AF DSP. The 
built in AF DSP does not however have all the neat adjustments that the 
JPS NIR-12 has, so I suspect that it could help. I wonder if connecting 
the JPS NIR-12 after the built-in DSP may not be the best way to do it. 
I wonder if anyone has used an outboard AF DSP unit INSTEAD OF the the 
built-in DSP, rather than IN ADDITION TO the built-in? That would 
require getting into the rig to pick up the audio to feed the NIR-12, 
since in the Omni VI the audio goes through the built-in DSP circuitry, 
whether or not you have it activated.

DE N6KB