[Icom] Re: Fw: scope pix 756pro cw rise times

[John Seney]

>John,
>
>Thank you very much for the enlightening scope pictures of the rise 
>times.  I have now changed my rise time to 8ms in my 756PRO. (not 
>II)   Have you, or can you, run a test on the effects of the rise 
>times with full QSK keying?   What effect does the various times 
>have on the waveform shapes at 30wpm in full QSK.   Or on the first 
>character sent in semi break-in?
>
>This information would also be very interesting and useful.  Thank you again.
>
>73
>
>John, N3WT

Hi John:

I looked at the envelopes yesterday. For first key down - such
as sending low speed dashes - vs. brisk sets of dots and dashes
and there is indeed a difference. But after studying it, I came
to the conclusion that while the scope can see it (the effect is
a slight lengthening of turn on time) the data isn't problematic
or statistically significant.

If you'd like a few screen shots, I'll pass them along. Its an
easy set-up. I didn't want to burn a lot of BW on something
that appears trivial.

73,

John Seney
Scope FAQ: http://www.qsl.net/wd1v

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