A few issues here. Firstly true "RTTY" is frequency shift keying which
uses a DC voltage change to shift the radio frequency. In the case of
MMTTY you need a simple transistor switching interface which can be
built into a serial "D plug" shell. From memory the circuit is in the
MMTTY manual. You would use the K3 on FSK.
Most users these days tend to use audio tones on transmit for RTTY
using a program such as fldigi (
http://www.w1hkj.com/) which is a lot
simpler than HRD, offers several modes in addition to RTTY, is
freeware and is available for Apple Mac, Linux and Windows. There is a
K3 control file (k3.xml) and you just need the fldigi program, no need
for the rig control program. You would run the K3 on DATA A, the
fldigi program controls the TX/RX via the RS232 serial lead to the K3,
reads the K3 frequency via the same lead, and sends/receives audio via
the K3 line in/out to your computer sound card. The program displays
real frequencies on the screen for the various data modes, including
RTTY.
HRD works in a similar manner to fldigi, but is (in my opinion) more
complex than it needs to be, seems to be forever in beta versions and
from the next release will no longer be free.
73 Dave, G4AON
-----------------------------------------
>Hi, I just started using RTTY on the K3 and I have some questions that I hope
>someone can answer.
>I am using MMTTY and so far I have done the following:
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