[RTTY] STDYKN ??

[Richard Ferch]

On Wed, 7 Dec 2005 at 19:03:53 -0000, GU0SUP said:


>If you are using MMTTY, then do a "right click" on the words, and this 
>will magically transform them from reverse to normal. If it was reversed, 
>then this will make the characters visible.

Uh, not quite, Phil. Right-clicking in MTTY will change between FIGS and 
LTRS case, so STDYKN would become '5$6(, which is not very helpful. 
Converting between FIGS and LTRS is easy; the trouble with trying to 
convert automatically between reverse and normal is that it is hard to 
predict where, if anywhere, the reversed signal will sync - one thing is 
sure, it will not sync on the intended stop and start pulses, because they 
are reversed.


>If you use AFSK, then MMTTY can Tx/Rx reversed by using the REV/NOR 
>button. If you use FSK, then you can't Tx in reverse, only Rx. Reversing 
>your transmission is done via the radio. On the IC756 series, press and 
>hold the RTTY/CW button and it will go to FSK-R.

Yes. This means that if you are using AFSK, if all the signals you are 
receiving look OK, you are automatically transmitting with the right 
polarity. Normally, with the radio in LSB you use MMTTY's normal position, 
and with the radio in USB you use the REV position. In FSK, however, 
getting the receive polarity correct has no bearing on the transmit 
polarity. You have to set the two independently.

73,
Rich VE3IAY


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