K3 Audio monitor delay

[Tom Boucher]

Does anyone else find the processing delay in the sidetone monitor most disconcerting when using SSB?

73
Tom G3OLB
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[Ignacy]

Never noticed it but I noticed the absence of feedback. So probably the delay is large enough to avoid feedback but small enough to not be noticeable by many (myself included).
Ignacy
 

Tom Boucher wrote

Does anyone else find the processing delay in the sidetone monitor most disconcerting when using SSB?

73
Tom G3OLB
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[Iain MacDonnell - N6ML-2]

I've not noticed any significant delay in the TX monitor, and I know I
would find it disconcerting if it was there. Not sure if TX EQ, or
some other option, might introduce such a delay.

By the way, I *do* get audio feedback if I use an external speaker and
the TX monitor.

    ~Iain / N6ML


On Fri, Jan 15, 2010 at 12:03 PM, Ignacy <[hidden email]> wrote:

>
> Never noticed it but I noticed the absence of feedback. So probably the delay
> is large enough to avoid feedback but small enough to not be noticeable by
> many (myself included).
> Ignacy
>
>
> Tom Boucher wrote:
>>
>> Does anyone else find the processing delay in the sidetone monitor most
>> disconcerting when using SSB?
>>
>> 73
>> Tom G3OLB
>> ______________________________________________________________
>> Elecraft mailing list
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>>
>
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[KK7P]

> I've not noticed any significant delay in the TX monitor, and I know I
> would find it disconcerting if it was there. Not sure if TX EQ, or
> some other option, might introduce such a delay.

The delay is due to: audio input anti-aliasing filter in the A to D, TX
AF filtering, phase shift network, interpolation filter (conversion from
12 kHz sampling rate to 48 kHz sampling rate) , post-IF clipper filter,
decimation filter (conversion from 48 kHz sampling rate to 12 kHz
sampling rate), reconstruction filter (part of the D to A).

We thought it best to allow you to hear the effects of the IF signal
processing, so delays are unavoidable.  Most people do not notice as the
K3 uses filters optimized to minimize delays.  Note that Tx EQ adds zero
additional delay. Like the Rx EQ, the Tx EQ just adds more constraints
to the AF FIR filter generator.

There may be opportunity to further redice delays by combining some
filter functions.  One of the items on my list of background tasks :-)

73,

Lyle KK7P
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[Mike Cox]

no, I don't really notice it....

but the (quarter to almost 1 sec) delay while operating full duplex on
high orbit satellites AO-10, AO-13 and AO-40 was VERY annoying and often
made me misspeak, almost like my tongue tripped over itself.

Mike


Tom Boucher wrote:

> Does anyone else find the processing delay in the sidetone monitor most disconcerting when using SSB?
>
> 73
> Tom G3OLB
> ______________________________________________________________
> Elecraft mailing list
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>
>  

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