Thanks, Don. I checked the transmitted signal with other TRX. No second harmonic was detected.
Yes, cocoaModem supports sound card RTTY. iMic is a USB audio device. 73 de JH3SIF, Keith > 2017/03/29 9:37、Don Wilhelm <donw...@embarqmail.com> のメール： > > Keith, > > The other station will not know what mark frequency you are using. The only > thing the other station hears is your mark and space frequencies (and the > resultant shift), so if you are using the proper RTTY shift, he should copy > you with no difficulty. > > Yes, there are some folks who are reluctant to use low tones with RTTY > because the 2nd harmonic of that tone falls within the SSB bandwidth. I > would suggest you ignore those comments - the KX3 works fine with the lower > tones. > > I am not certain what you meant about FSK D - you should be using AFSK A, so > FSK D is not relevant. I do not do Mac and I do not do CocoModem, so this > may be some mixture of settings between the KX3 and CocoModem that do not > make sense to me. > Does CocoModem support soundcard RTTY? That is what you should be using, no > matter what CocoModem calls it. > > FSK D mode with the KX3 is used to send RTTY from CW paddles (not computer > input - the KX3 must see the dots and dashes directly from the paddles). An > alternative to the paddles for FSK D input is a software application that can > send "KY" commands with ASCII text. Few applications other than KX3 Utility > have that capability. > > 73, > Don W3FPR > > On 3/28/2017 8:04 PM, Keith Onishi wrote: >> I have been trying to set up for RTTY operation with KX3 + iMic + cocoaModem >> on Macbook Pro, but not successful. >> Mode selection on KX3 is AFSK A and cocoaModem setup is matched to the KX3 >> setting. >> RTTY signal received by KX3 appears not around 2125Hz but around 900Hz. So, >> I set cocoaModem’s mark frequency to 915Hz. With that setting, decoded text >> appears on the screen. KX3 VFO is properly tuned to the signal, of course. >> When FSK D on KX3, all is same. RTTY signal appears around 900Hz as well. >> >> I found this had been discussed several years ago in the ML, but no change >> in KX3 specification since then. >> I would like to know if this mark frequency is OK in QSO with other RTTY >> station. >> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
