[Elecraft] Impossible mission? USB with the 13khz filter for PSK31on Digipan

[Joe Subich, W4TV]

I don't even see it as an issue ... even with those receivers 
that produce audio to 6 KHz (for DigiPan 2.0), the transmitter 
will be limited to 2.8 or 3 KHz audio input anyway due to the 
bandwidth of the transmit IF filter.  Without checking, I believe 
the K3's transmit audio (DATA A mode) is 200 - 2800 Hz just like 
any other properly designed transceiver.

73, 

   ... Joe, W4TV 
 


> -----Original Message-----
> From: Thomas Tumino [mailto:thomastumino at yahoo.com] 
> Sent: Saturday, January 31, 2009 10:26 AM
> To: elecraft at mailman.qth.net; lists at subich.com
> Subject: RE: [Elecraft] Impossible mission? USB with the 
> 13khz filter for PSK31on Digipan
> 
> 
> Thanks Joe for setting me straight on that.  It has been 
> years since I had read about it.
> 
> So I guess this is only a PSK31 issue (or any software with 
> panoramic receive) with an external computer, and minimal at 
> that...still it would be nice...
> 
> 73,
> Tom
> 
> 
> --- On Fri, 1/30/09, Joe Subich, W4TV <lists at subich.com> wrote:
> 
> From: Joe Subich, W4TV <lists at subich.com>
> Subject: RE: [Elecraft] Impossible mission? USB with the 
> 13khz filter for PSK31on Digipan
> To: thomastumino at yahoo.com, elecraft at mailman.qth.net
> Date: Friday, January 30, 2009, 9:10 PM
> 
> 
> > I can only speak for Yaesu and Icom gear, but Yaesu
> > rigs specify 5Khz transmit FM in their manuals and in
> > the Icom 706MKIIG service manual states FM deviation
> > is adjusted for 4.5Khz.
> 
> There is a BIG difference between FM deviation and 
> maximum modulating frequency (audio response).  I was 
> speaking specifically to maximum modulating frequency. 
> 
> As Lyle has said elsewhere, the maximum modulating 
> frequency in the K3 is limited to about 2.8 KHz - in 
> all modes except ESSB - which results in an occupied 
> bandwidth of about 15.5 KHz with 5 KHz of deviation 
> for FM.  
> 
> 
> 
> 
> 
> > -----Original Message-----
> > From: Thomas Tumino [mailto:thomastumino at yahoo.com]
> > Sent: Friday, January 30, 2009 1:33 PM
> > To: lists at subich.com
> > Subject: RE: [Elecraft] Impossible mission? USB with the 
> > 13khz filter for PSK31on Digipan
> > 
> > 
> > 
> > 
> > No, typical transmitted bandwidth for communications use -
> > including FM is about 100 Hz to 3000 Hz.  
> > 
> > I can only speak for Yaesu and Icom gear, but Yaesu
> > rigs specify 5Khz transmit FM in their manuals and in
> > the Icom 706MKIIG service manual states FM deviation
> > is adjusted for 4.5Khz.  I would assume
> > this was the standard for all Yaesu and Icom gear
> > at least.  Some Yaesu rigs do have a special 
> > "FM-N" transmit mode of 2.5 Khz, similar to FRS radios,
> > but I think that mode is the exception and not 
> > the rule. 
> > I think the DSP receive limit of 4Khz should at least
> > be mentioned in the K3 materials (or perhaps it 
> > is and I missed it?).  This bothers me as
> > really I feel FM and AM are most regularly used 
> > to enjoy audio of a better quality then SSB audio, 
> > and a 4Khz limit cuts down on that a bit.
> > 73 to all and thanks for your
> >  help,
> > Tom-N2YTF
> >  
> > 
>