SCS PTC-IIex, Manual

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6 Commands
To differentiate easier, the following system message is given:
AMTOR/PTC-IIex V.1.1 (C) SCS-GmbH 94-95
======================================
**-A-** (DFCJ):>
The system gives the following command prompt:
**--MODE--** (SELCALL):>
MODE is the actual operational mode:
A
for AMTOR,
M
for AMTOR monitor mode,
R
for RTTY, C for the CW terminal and P for PSK31. SELCALL is the present SELCALL
of the PTC, e.g.
**-M-** (DMAA):>
.
It is naturally still possible to receive PACTOR connects, to read PACTOR QSO's,
AMTOR FEC and NAVTEX transmissions.
With the
SCS
-PTC-IIex it is possible to use upper and lower case letters in AMTOR!
The PTC uses the PLX-APLINK convention to transfer data. It is thus completely
APLINK compatible, and can read messages from, and send messages to the APLINK
system using both capitals and lower case.
During the reception of AMTOR transmissions (FEC or ARQ), it is possible that a figure
shift, or letter shift character, is lost due to QRM etc. In these cases, using <Ctrl> + <B>
(<Ctrl-B>) switches to letters, and normally resolves the otherwise unreadable text.
In an AMTOR QSO, instead of using the usual +? change over sequence, it is possible to
use the normal PACTOR CHANGEOVER character. The PTC changes the PACTOR
CHANGEOVER character automatically into the +? sequence.
A break in is made using the normal BREAK IN character (
Bkchr
).
6.4 APower
Default setting: 0
Parameter: X 0… 200, minimal PSK amplitude.
This command allows the automatic transmitter power adjustment of the PTC-IIex to be
switched on and off. If the channel conditions fluctuate rapidly, it is recommended to
switch off the Auto Power Option.
APower operates only during a PACTOR-II/III link.
If
APower
is set 0, no automatic power reduction happens. The audio output amplitude is
always equal to the value being set with the command
PSKAmpl
.
If the argument is greater than zero, the auto power will be activated, but the lowest
automaticly established value will never be below the value defined by the argument of
the
APower
command. The
AP
value is equivalent to the minimal PSK amplitude . (But it
is furthermore valid, that the PTC-IIex reduces the power only to 1/64 of the maximum
amplitude given by
PSKAmpl
, although the
AP
value would allow further reducement.)
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