SCS PTC-IIex, Manual

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5 PTC-Firmware
Chapter 5
5 PTC-Firmware
With the PTC-IIex it is nearly possible to configure everything. In the manual always the
default settings are assumed! If you have changed these settings you must keep this in
mind while reading the manual. This is very important in case of the control characters
which can be freely defined (CHANGEOVER character in chapter
6.19 on page 44 ,
ESCAPE character in chapter 6.39 on page 54 , BREAKIN character in chapter 6.12 on
page 42 and the QRT character in chapter 6.78 on page 70 ).
5.1 General
The operation of the PACTOR-Controller (PTC) takes place using commands which are
sent over the serial interface. The data transfer format is:
8 data bits, 1 stop bit, no
parity and half-duplex . The baudrate is normally sensed automatically by the PTC. The
PTC-IIex then acknowledges with
cmd:
and waits for a command. All commands and
command strings are closed with <CR> (ASCII 13). <LF> (ASCII 10) is ignored during
the command input. Working on the computer means you have to enter <Return>.
Corrections can be carried out with
Backspace (ASCII 8), above the <Return> key.
When in Standby, the
cmd:-
prompt is available immediately after the last command. The
PTC-IIex is in the command mode. The command mode is displayed with the system
prompt
cmd:
or
pac:.
During link set-up and while connected the PTC is in the converse mode. Switching to
RTTY or turning on the CW terminal also activates the converse mode. Whereas in the
so-called converse mode, characters from the RS232 interface are placed in the transmit
buffer and are sent over the HF channel at the next opportunity.
In Converse mode, commands to the PTC must be preceded with an ESCAPE character
(initially set to <ESC>, ASCII 27). After each ESC character, only ONE command is
accepted. After an invalid entry, however, the PTC immediately allows a new input. (The
ESCAPE character, as well as the following command characters, DO NOT, of course, go
into the transmit buffer.)
During an Unproto transmission the output amplitude shall be modified.
Start unproto transmission
cmd:
U 1
<Return>
The PTC-IIex starts the Unproto transmission and switches in the converse mode.
Clicking on <Esc> enables the command prompt cmd: . Now you can enter the command
to change the output amplitude.
cmd:
FSKA 100
<Return>
Only this command is executed. The PTC switches immediately back to the converse
mode.
Now you can stop the Unproto transmission entering the QRT character.
<Ctrl> + <D>.
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