[Elecraft] K3 operating tip: RTTY operation without a computer

[Alan Bloom]

No I think it's working correctly.  For standard RTTY, mark should be
high and space low.  (If you're of a certain age, remember the mnemonic
LSMFT - Low Space Makes Fine Teletype.)

Al N1AL 


On Fri, 2007-12-28 at 13:19, Van W1WCG wrote:
> Hi Wayne,
> 
> Everything works great -- but how do I reverse mark and space tones?
> REV does not do this.  I listened to a few test signals on 20m and then 
> noticed
> that while sending in TEST TX mode, my mark and space are reversed
> from the prevailing on-the-air sense, with the mark being the high tone
> instead of the low tone.  The LSB indicator is on while setting the data
> mode to FSK D, but it goes away after the menu is dismissed.  But I
> can't seem to exchange or reverse the tones.
> 
> Have I missed something???
> 
> 73, Van W1WCg
> K3 #42
> 
> ----- Original Message ----- 
> From: "wayne burdick" <n6kr at elecraft.com>
> To: "Elecraft Reflector" <elecraft at mailman.qth.net>
> Sent: Friday, December 28, 2007 1:24 PM
> Subject: [Elecraft] K3 operating tip: RTTY operation without a computer
> 
> 
> > If you're a CW operator but would like to dabble a bit in RTTY (especially 
> > easy during a contest), you're in luck: You can use the K3's internal 
> > keyer to directly transmit RTTY. You can also copy RTTY on the K3's text 
> > display, making it a self-contained RTTY station -- no need to set up 
> > computer cables or software.
> >
> > Just follow the procedure below (all parameters are saved, so you'll only 
> > need to do the setup one time).
> >
> > 1. Tap either end of MODE to get to DATA, then hold DATA MD and select FSK 
> > D.
> >
> > 2. Hold PITCH and select a mark tone; I use 915 Hz.
> >
> > NOTE: No matter what pitch you select for FSK D mode, the K3's VFO will 
> > always show you your mark frequency. Thus there's no need to do any math 
> > to convert from an SSB suppressed-carrier frequency to the actual data 
> > carrier frequency. This makes RTTY operation very similar to CW: just tune 
> > in a signal and call them using the keyer paddle.
> >
> > 3. Hold TEXT DEC and turn the text decoder. You'll start seeing random 
> > noise characters on the VFO B display.
> >
> > 4. Tap CWT; the upper half of the S-meter will become an RTTY tuning aid. 
> > When tuning in signals, try to get the mark and space tones balanced in 
> > their number of bars on either side of the CWT pointer.
> >
> > 5. Set power to the desired level. The K3 can transmit at full power in 
> > RTTY mode.
> >
> > 6. Plug in a keyer paddle. Adjust the sidetone volume in CW mode (if 
> > necessary), then switch back to DATA mode.
> >
> > 7. Send a few characters with the paddle. If you don't hear the FSK 
> > signal, adjust the MONitor level (hold the CMP/PWR knob in to select MON 
> > level adjust). Note that you can adjust the levels in TX TEST mode, too, 
> > without putting out any power. This is a good way to practice with 
> > CW-to-RTTY.
> >
> > 8. If you pause, the K3 will remain in a data idle state for about 4 
> > seconds before automatically returning to receive mode. To cut the 4 
> > second timeout to about 1 second, you can send "..--" (IM prosign, for 
> > "IMmediately exit").
> >
> > For further details, see the Owner's Manual, page 32 (revision C).
> >
> > Have fun!
> >
> > 73,
> > Wayne
> > N6KR
> >
> > ---
> >
> > http://www.elecraft.com
> >
> >
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