[Icom] IC756Pro DSP customization

Wed, 12 Feb 2003 17:24:07 -0600

Adam,resend that link...doesn't work...thanks,john

----- Original Message -----
From: "Adam Farson" <[email protected]>
To: <[email protected]>
Sent: Wednesday, February 12, 2003 4:50 PM
Subject: RE: [Icom] IC756Pro DSP customization


> Hi Don,
>
> You could also try a 500Hz CW filter bandwidth setting with, and without,
> the BPF indicator. The shape factor with the BPF indicator on is tighter
> than that with BPF off.
>
> More on the BPF indicator:
>
>
<http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/CWFi
> lter.htm#BPF>
>
> Best 73,
> Adam, VA7OJ/AB4OJ
> North Vancouver, BC, Canada
> http://www.qsl.net/ab4oj/
> Icom FAQ Site:
> http://www.qsl.net/icom/
>
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Don Rasmussen
> Sent: February 12, 2003 13:49
> To: [email protected]
> Subject: [Icom] IC756Pro DSP customization
>
>
> Hi Guys,
>
> Ever notice how much different the IC756Pro sounds than an analog
> rig in CW mode?
>
> In side by side comparisons using the factory default CW bandwidths,
> it seems there
> is definitely room for improvement with respect to listening
> fatigue.
>
> The biggest change can be seen by a simple increase of the CW pitch
> front panel
> control to 750hz or better. Regardless of the pitch of the signal
> received, the background
> audio changes dramatically based on this control.
>
> It seems that the overall sound of the receiver is a function of
> four factors. The adjustments
> are rarely incremental so you have to try all the settings. What
> sounds "good" is subjective
> of course and the speaker is also important.
>
> The CW setup here:
>
> CW Pitch: 700hz - this is a major factor in how any of the filters
> and PBT adjustments sound.
> FL1 (Wide CW) 800hz Filter, PBT1 +100, PBT2 + 25, bw=650, sft+125 -
> Ultra Quiet.
> FL2 (Narrow CW) 500hz Filter, PBT1 +25, PBT2 (no adjustment),
> bw=450, sft+25
> FL3 (CW Passband Spot) 150hz Filter, bw=150, sft=0
>
> This setup is to minimize the receiver noise and provide a soothing
> tone using
> a large speaker, it's a Drake MS4 here. The filter at 150hz with no
> PBT offset is setup
> so that the receive signal can be accurately centered in the
> passband before going back
> to the 800 or 500hz setup.
>
> This works great here and approximates some of the quieter analog CW
> rigs here. I'd like to
> know if anyone has other preferred settings for these controls on CW
> or phone!
>
> 73,
> > Don Rasmussen
> > Carlsbad, Ca.
> > [email protected]
>
>
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>
> ----
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> Icom Users Net: Sundays, 1700Z, 14.315 MHz
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