Timewave DSP-232, Operating Manual

Page: 157 / 271

Chapter 8 ASCII and Baudot Operation
With
WORDOUT OFF
, each character you type is sent to the radio just as you typed it, without any delay. Also,
the backspace character is transmitted in Baudot, ASCII, AMTOR and PACTOR modes. With WORDOUT ON ,
pressing the backspace key cancels out the preceding character and neither are transmitted.
In Baudot and AMTOR, the backspace character is transmitted as a “?” since there’s no backspace in those modes.
In ASCII the backspace character is transmitted, but the destination station must be able to pass it. AEA products
should have
MFILTER
set to zero to allow backspaces to print.
WRu ON
|
OFF
Default: OFF
Mode: Baudot, ASCII Host: WR
OFF
Your Auto-AnswerBack isn’t sent after another station sends WRU?
ON Your Auto-AnswerBack is sent after another station sends WRU?
Use the
WRU command in Baudot and ASCII to enable or disable your DSPs Automatic AnswerBack (AAB)
feature.
With
WRU ON
, your DSP sends the AnswerBack on receipt of a distant station’s WRU? request [“FIGS-D” or “$”
in Baudot or a (
CTRL-E
) in ASCII]. Your DSP keys your transmitter, sends the text stored in the AAB field, then
unkeys your transmitter and returns to receive.
The
WRU function is defaulted to ON in AMTOR as per the CCIR recommendation. To allow for special
applications where it may be helpful to disable the
WRU
function in AMTOR,
UBIT 9
, or bit 9 of the
CUSTOM
command controls this feature.
XBaud
n Default: 0
Mode: ASCII/Baudot Host: XB
“n” Specifies an exact baud rate used in receiving ASCII and Baudot RTTY.
XBAUD enables hardware decoding of ASCII and Baudot signals using the DSPs 8530 Serial Communications
Controller IC. This can allow the DSP to achieve better copy of these signals as well as allow non-standard data
rates to be received. One disadvantage of
XBAUD is that the software commands, RXREV and TXREV , can’t be
used to invert the data so the correct sideband must be used by both parties.
To use
XBAUD , simply enter the data rate that you want in either ASCII or Baudot modes. For example, a 20-meter
Baudot RTTY enthusiast may want to set
XBAUD
to
45
to improve copy of weaker signals on the band.
It’s important to remember that
XBAUD
overrides both the
RBAUD
(in Baudot) and
ABAUD
(in ASCII) as well as
the inverting commands, TXREV and RXREV . This means that if XBAUD has been set to 45 for Baudot operation,
it should be reset to
0
before changing modes to ASCII. Otherwise, the DSP will attempt to receive ASCII at 45
bauds! To help reduce the chance of this error occurring, the DSP will disable XBAUD by setting it to 0 every time
the
SIAM
mode is used and the command
OK
is entered.
Xmit Immediate Command
Mode: Baudot/ASCII/Morse Host: XM
XMIT
keys your radio’s PTT line and prepares the radio to receive outbound data and Morse characters from the
DSP. This command can only be used while in the Command mode.
XMIT switches your DSP to either the Converse mode or the Transparent mode, depending on the setting of
CONMODE
. Typing the
CWID
or the
RECEIVE
character will (
RETURN
) you to receive. Typing
RCVE
from
the Command mode will also (
RETURN
) to receive.
September, 05 8-19