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:[email protected]] > Sent: Saturday, January 31, 2009 10:26 AM > To: [email protected]; [email protected] > 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 <[email protected]> wrote: > > From: Joe Subich, W4TV <[email protected]> > Subject: RE: [Elecraft] Impossible mission? USB with the > 13khz filter for PSK31on Digipan > To: [email protected], [email protected] > 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:[email protected]] > > Sent: Friday, January 30, 2009 1:33 PM > > To: [email protected] > > 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 > > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
