> 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 Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
