6.5 Baudot RTTY Operating Tips
The PK-232 can automatically determine the speed of the received
signals with the SIGNAL IDENTIFICATION (SIAM) mode. However, you can
manually step through all the available RTTY receiving speeds with the
RBAUD command.
The following "Function Keys" and immediate commands are included for
Baudot RTTY operating convenience.
Immediate Commands from the Command Mode:
"L" Forces LETTERS case.
"N" Forces FIGURES case.
"R" Switches system to receive mode, forces LETTERS case.
"X" Switches system to transmit mode and forces immediate
entry into Converse mode.
"K" Load Transmit type ahead buffer.
"Function Key" characters embedded in transmitted text:
<CTRL-B> Sends AAB string as a HEREIS message.
<CTRL-E> Sends "Who Are You" request to distant station.
<CTRL-O> Sends LETTERS shift character.
<CTRL-N> Sends FIGURES shift character.
<CTRL-D> Shuts off transmitter after sending character buffer.
<CTRL-F> Sends call sign in Morse and shuts off transmitter.
<CTRL-T> Sends the Time if the DAYTIME clock has been set.
6.5.1 Changing Speed
Assume you've been receiving at 45 bauds and wish to increase the baud
rate in steps. From the Command mode, type RB U followed by an
<Enter>. The PK-232 responds with:
RBaud was 45
RBaud now 50
The RBAUD command sets the Baudot RTTY speed. The most common speed
is 45 bauds on HF, but other speeds including commercial speeds are
supported. See the Command Summary for all the supported speeds.
6.5.2 Entering Your Auto-AnswerBack
Baudot RTTY allows you to request the identity of the station you are
conversing with by sending your PK-232 the <CTRL-E> character. This
causes the PK-232 to send a FIGS-D request to the other station.
For this reason, you should set your own Auto-AnswerBack (AAB) message
to either "DE YOUR-CALL" or "QRA YOUR-CALL". See the Command summary.
If you then turn your own WRU command, your PK-232 will automatically
respond by sending the AAB message when another station requests your
identity in Baudot and then stops sending.
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