5 PTC-Firmware
27
Chapter 5
5
PTC-Firmware
With the PTC-IIIusb 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
,
ESCAPE character in chapter
, BREAKIN character in chapter
on
and the QRT character in chapter
5.1
General
The operation of the PACTOR-Controller (PTC) takes place using commands which are
sent over the USB interface. The PTC 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 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 USB 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-IIIusb 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>.
The PTC-IIIusb ends the Unproto transmission and changes to the command mode.