[TenTec] Orion 2.055 Observations

[Ron Castro]

The audio chain and the IF chain are one in the same.  The final IF is 25 
kHz, which is handled by a DSP circuit not unlike a computer Sound Blaster 
card.  The final stage of this is a Digital to Analog converter (DAC), just 
like a Sound Blaster, followed by a power amp to drive the speakers and 
headphones. Nothing special happens in the analog IF's that precede the 25 
kHz except the roofing filters and the hardware NB.  NR, AN, Manual Notch, 
PBT, BW, BFO, most of the AGC, audio boost/cut, S-meter, etc. are all on the 
A7 logic board, which is the final IF.

Ron Castro
Chief Technical Officer
Results Radio, LLC


----- Original Message ----- 
From: <Kc9cdt at aol.com>
To: <tentec at contesting.com>
Sent: Friday, March 03, 2006 8:12 AM
Subject: Re: [TenTec] Orion 2.055 Observations


> If that stuff is moved to the audio chain... They need to move it back to 
> the
> IF chain.
> Does anyone know about this for sure or are we just guessing?
>
> Lee
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