[TenTec] RF Speech Processor

Bob McGraw - K4TAX RMcGraw at Blomand.net
Fri Jun 14 07:37:56 EDT 2013

I tend to agree that running an external speech processor AND the internal 
processor at the same time would not seem be the better configuration.

My experience and measurements indicate the internal processor, being DSP 
based, is equal to the external processor effectiveness in terms of raising 
the average PEP value.   I suppose the advantage of the external processor, 
i.e. 715, is the fact it has a way to "change the sound" of the audio thus 
making it more piercing or penetrating along with narrowing the transmitted 
audio bandwidth as well as raising the average or effective PEP level while 
the internal DSP system will largely only raise the average or effective PEP 

My measurements using the internal speech processor indicate that SP values 
in the 40% to 60% range are indeed effective in raising the average or 
effective PEP value some 6 dB to 8 dB without causing any concern of audio 
issues.  By using a narrowed SSB TX BW and a higher value for TX Roll OFF 
one can accomplish the same effective results as typical with the 715.   One 
must also understand that the correct adjustment of the hardware mike gain 
and the DSP MIC gain must be applied as well.

Bob, K4TAX

----- Original Message ----- 
From: "Richards" <jrichards at k8jhr.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Thursday, June 13, 2013 11:55 PM
Subject: Re: [TenTec] RF Speech Processor

> Golly, Gary... I would not run both the 715 and the Omni VII onboard 
> processor at once, ... or do I misunderstand what you are saying...?
> The Omni VII has its own RF-type processor, and the 715 is also an RF 
> processor - I wonder if it is best to run both.
> Or is it?
> =================  K8JHR  ====================
> On 6/13/2013 10:05 PM, GARY HUBER wrote:
> The OMNI-VII is set for TX BW = 2500,  TX Roll
>> Off = 300 Hz, TX EQ = 0 dB, Speech Proc = 50%. The 715 is set up
>> initially to its manual suggested values.
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