Timewave DSP-232, Operating Manual

Page: 176 / 271

Chapter 9 AMTOR Operation
“
n ” is a hex value $00-7F, default $5F (underscore). This is the character that the DSP displays when it receives a
corrupted or bad character in Morse, ARQ, FEC, PACTOR, NAVTEX or TDM. You may want to set this character
to $2A (asterisk), $07 (bell), $20 (space) or $00 (null)—whichever works best for you.
ERRCHAR ON
or
ER Y
restores the default.
FEc Immediate Command
Mode: AMTOR mode B Host: FE
FEC
starts an AMTOR FEC (mode B) transmission. Use
FEC
for CQ calls in AMTOR. Be sure to include your
SELCALL and
MYIDENT
code in your CQ message so that the other station can call you back in ARQ.
FEC is necessary for all roundtable AMTOR contacts. When operating in FEC, let your DSP begin each
transmission with 3-5 seconds of idling; the RTTY practice of transmitting a line of RYRYRY is unnecessary on
FEC.
You can signal the end of your FEC transmission by typing the changeover sign “+?,” recognized world over as the
RTTY equivalent of “KKK.” However, in FEC “+?”
isn’t a software command. You still have to unkey your
transmitter (with the
RECEIVE
or
CWID
characters, or the
RCVE
command) as you would in RTTY.
GUSERS n Default: 0
Mode: packet, AMTOR, PACTOR Host: GU
“
n ” 0 to 3 specifies the maximum number of users allowed to use your node.
GUSERS allows up to
n number of stations to connect to your
MYGATE
call. The argument “ n ” may be 0-3, with
zero meaning no station can use your node. Alternatively, n can be thought of as the maximum number of pairs of
stations which may be connected through your Gateway.
Your must have your
MYGATE call entered and GUSERS set to a number greater than 0 to enable the DSPs node
function.
HEReis
n Default: $02 (
CTRL-B
)
Mode: Baudot, ASCII, AMTOR and PACTOR Host: HR
“
n ” Is the hex representation ($01-$7F) of the character that causes the
AAB
string to be sent in the middle of
transmitted text.
If you want to send your own
AAB string for identification during a transmission, simply enter the HEREIS
character.
Id Immediate Command
Mode: AMTOR/ASCII/Baudot/Packet Host: ID
In AMTOR, the
ID
command acts like the
RCVE
command only it adds a Morse ID before going back to receive.
In ASCII and Baudot, the ID command causes a Morse ID to be sent much like an immediate version of the CWID
character (
CTRL-F
). Because the
ID
command is immediate, the message “
Transmit Data Remaining
” will
be displayed if any unsent data remains in the transmit buffer. To clear the data from the buffer, enter TC at the
cmd:
prompt.
In packet,
ID
is an immediate command that sends a special identification packet. The
ID
command allows you to
send a final identification packet when you take your station off-the-air. ( HID must also be set ON ). The
identification consists of a UI-frame, with its data field containing your
MYALIAS
(if it’s entered),
MYCALL
, and
the word “digipeater”. The ID packet is sent only if your DSP has digipeated any transmissions since the last
automatic identification.
September, 05 9-17