6 Commands
92
38: 3
long
cycle
39: 4
long
cycle
40: 5
long
cycle
41: 6
long
cycle
If no argument is given, then the PTC-IIIusb uses the mode that was last used, or the
default setting. The actual mode is shown on the LED status field.
The Unproto mode may be terminated with a QRT character, a
Disconnect
. It is
always possible to abort a unproto transmission using the command
DD
.
A repetition rate of 3 does not mean that the text appears on the screen of the receiving
station 3 times. In this case, the PTC increases the redundancy of the signal by repeating
it. The transmission takes longer, but there is a correspondingly greater chance of
receiving it correctly. At the receiving station, once a packet is correctly received, it will
not be received again. A data packet may be repeated 3 times, but will only appear once
at the receiving station(s). It is recommended that the repetition rate should be adjusted
according to propagation conditions. A greater repetition rate, and lower baud rate, for
poor conditions, and conversely a lower repetition rate, and higher baud rate, for better
conditions.
After approximately 4 minutes of idle transmissions, an automatic QRT is carried out.
6.101
UPDATE
The
UPDATE
command renews the PACTOR firmware in the Flash ROM of the PTC-
IIIusb. It should only be used together with the corresponding program on the PC, which
automaticly performs the update procedure with all necessary handshake and control
mechanisms.
6.102
USer
Remote
The
User
command enables an overview of all presently operating PTC-IIIusb links.
Here the PTC-IIIusb gives out the callsign of the opposite station, as well as the
digipeater list etc. In contrast to the
CStatus
command in the
pac:-
menu, the
User
command also lists an operating PACTOR link, under channel number 0. (This channel is
free, as the PR channel 0 only serves as a
monitor channel
and thus no link is possible).
6.103
USOs (Unshift On Space)
Default setting: 0
Parameter: 0 Unshift on space disabled.
1 Unshift on space enabled.
Has effect only on RTTY reception. With
USOs
switched on, every received space
character sets the Letter/Figures shift to Letters. This has the advantage that the manual
shift switching (<Ctrl-B> or <Ctrl> + <B>) required with weak or noisy signals, (to
mitigate the figures printed due to a false Figures shift being received, or Letters shift
being missed) can be virtually dispensed with. The long strings of numbers often received
