[SCCC] NAQP RTTY This Saturday - SCCC Teams

[Ryan Huggins]

Thank you, that is VERY helpful!  I have N1MM+ from some other contests (as well as N3FJP's various loggers), but N1MM does seem more suited for this type of contest.  Thanks for the tip on the WinKeyer.  I have one of those from some attempts at CW and it should work with the radio I'm using now (FTDX101MP).  Before I had it working with an IC7100.

Thanks again,
Ryan

-73
Ryan, KI6BTY


On Wednesday, July 17th, 2024 at 2:56 PM, John Rotondi, W6JBR <w6jbr at earthlink.net> wrote:

> Hello Ryan,
> 
> I see that you have recommendations for a logger such as N1MM+, which I also highly recommend. However, I think that you may have been asking about a RTTY modem program?
> 
> Besides N1MM+, you will need an RTTY modem app. Several can be integrated within N1MM+, including the general digital modes app FLDIGI, and the RTTY-specific MMTTY. I recommend installing both, and interfacing them within N1MM+.
> I do strongly recommend using MMTTY for RTTY.
> 
> Note that there are two variants of RTTY transmissions:
> Historically, RTTY has been accomplished by the use of Frequency Shift Keying (FSK), which is a CW signal shifted between two frequencies to create a Mark and Space, at a specific rate. The standard amateur RTTY shift is 170 Hz, with 850 Hz used by military, and in some other applications. The standard amateur baud rate is 45.45 baud.
> 
> With the use of computers, modern transceivers accomplish transmitting Mark and Space tones using soundcard audio modulation transmissions in Lower Side Band (LSB) mode. This variant of RTTY transmission is Audio Frequency Shift Keying (AFSK).
> The receiving station generally cannot tell the difference between the two, unless the AFSK signals are over modulated- which of course cannot occur with FSK, being a shifted CW signal.
> 
> So, AFSK is probably easier to accomplish if you have been operating any other soundcard modes. However, the setup requiring audio I/O levels, and possible modulation frequency offsets, makes FSK more reliable and easier to set up, IMHO.
> 
> If your rig has an FSK Keying Input, this, coupled with a PTT signal, can allow you to do FSK. You will need to provide a simple hardware interface from the computer to provide these two signals. An additional software module may need to be added to MMTTY in this case. OR, you can use the second set of outputs from a Winkeyer3 USB keyer using firmware v3.1 to generate FSK and PTT, alleviating the need for any interface hardware or additional software modules. I operate RTTY in this fashion using my Winkeyer3 USB.
> 
> I hope this information is helpful.
> 
> Good luck in the contest!
> 
> 73 de John, W6JBR
> 
> 
> de W6JBR’s iPad
> .. . . _ _ .... ._ _ _ ... ..
> 
> > On Jul 17, 2024, at 12:40 PM, Ryan Huggins via SCCC sccc at contesting.com wrote:
> > 
> > I have not done RTTY yet, but it's been on my to-do list. What software do you recommend for it?
> > 
> > -73
> > Ryan, KI6BTY
> > 
> > > On Wednesday, July 17th, 2024 at 10:03 AM, Dennis Younker NE6I NE6I at cox.net wrote:
> > > 
> > > Hi all,
> > > 
> > > If you'd like to on an SCCC team for this Saturday's NAQP RTTY contest,
> > > please let me know. So far, we have:
> > > K6MUG
> > > KF6RY (W6ZL)
> > > 
> > > 73, Dennis NE6I
> > > 
> > > -----Original Message-----
> > > From: SCCC sccc-bounces at contesting.com On Behalf Of Dennis Younker NE6I
> > > 
> > > Sent: Monday, July 15, 2024 2:44 PM
> > > To: sccc at contesting.com
> > > Subject: [SCCC] NAQP RTTY This Saturday - SCCC Teams
> > > 
> > > Hello all,
> > > 
> > > The July edition of the NAQP RTTY contest is this Saturday. If you'd like to
> > > be on an SCCC team, please let me know.
> > > 
> > > 73, Dennis NE6I
> > > 
> > > _______________________________________________
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> > > SCCC at contesting.com
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> > 
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