Timewave DSP-232, Operating Manual, Page: 140 / 271

Chapter 8 ASCII and Baudot Operation
The following parameters are the most common settings for HF ASCII operation. Check the parameters and make
sure they are set as follows*:
ABAUD 110
RXREV OFF
TXREV OFF
WIDESHFT OFF
*These are default values.
Set your HF radio to LSB unless you connected your DSP to your radio's direct FSK keying lines. If you have, then
you should select the FSK operating mode on your radio.
Some 2-Meter VHF Bulletin Boards and MSOs use ASCII at 110 and 300 bauds.
Setting Up for Baudot
(If you're using an AEA program, follow the instructions in the program's manual to set up and use Baudot.)
To use the Baudot mode, simply enter
BAUDOT
(or
BA
) at the
cmd:
prompt. The DSP responds by displaying the
previous mode it was in, then its new mode:
cmd:
BA
Opmode was
(
previous mode
)
Opmode now BAudot
cmd:
Look at your DSP’s front panel to verify that you're in the Baudot mode—the BAUDOT indicator symbol, ‘b’,
should glow. You can choose the appropriate modem number at this point using the MODEM command. For a list
of available modems use the DIR command.
The following parameters are the most common settings for HF Baudot operation. Check the parameters and make
sure they are set as follows*:
RBAUD 45
(this is the most common amateur speed on HF)
RXREV OFF
TXREV OFF
WIDESHFT OFF
*These are default values.
Set your HF radio to LSB unless you connected your DSP’ to your radio's direct FSK keying lines. If you have, then
you should select the FSK or RTTY operating mode on your radio.
Receiving ASCII & Baudot
Most RTTY operation occurs on the 20-meter band between 14.08 and 14.10 MHz, though activity can be also
found on the other HF amateur bands as well—it's located between 80 KHz and 100 KHz up from the bottom of the
band as it is on 20 meters.
Since HF Baudot and RTTY stations use either 170 Hz or 200 Hz FSK to send data, tuning accuracy is very
important. Follow the tuning procedure below:
1. Put your HF receiver in either LSB or FSK/RTTY/PACKET, depending on your set-up.
2. Turn any IF-shift and passband-tuning controls to their center or “off” position.
3. Adjust the volume to a comfortable listening level.
8-2 September, 05