Timewave DSP-232, Operating Manual

Page: 188 / 271

Chapter 10 Morse Operation
Opmode now MOrse
cmd:
Look at your DSPs front panel to verify that you’re in the Morse mode—the ‘C’ (for CW) symbol will glow in the
Mode window.
Next, you can choose which modem you want to use using the
MODEM command, followed by the specific modem
number. For a list of modems available in the DSP, type
DIRECT
at the
cmd:
.
Tuning in Morse Stations
Tuning in Morse stations properly is critical to successful copying. Follow this procedure:
1. Select RADIO 1 or 2 using the RADIO command to switch the DSP to the port that’s associated with your
radio.
2. Put your HF receiver or transceiver in the CW mode.
3. Adjust the volume to a comfortable listening level.
4. Turn any IF-shift and passband-tuning controls to their center or “off” position.
5. Tune your receiver for Morse signals. Until you hear some, the DSP’s tuning indicator’s two, center LEDs
will glow constantly. When you find a signal, slowly vary the tuning control on your receiver while
keeping an eye on the DSP’s tuning indicator. If you’re tuned to a strong signal, the two indicator LEDs
should “swing” out from the center toward the left and blink with each received dit and dah.
Note : The strength of the received signal is proportional to how far to left the LEDs will swing from the
center. Also, the DSP’s filtering is such that it can only interpret Morse signals heard at a frequency of
800 Hz—a pseudo frequency standard for HF CW.
6. Using either the THRESHLD or AUTOTHR command, adjust the Threshold so the DCD light goes out
when no station is being received. That way, you’ll prevent “garbage” characters from printing on your
screen.
With a solid signal, a good fist, and the other station tuned in properly, you should see “real time” copy; characters
will appear on your screen as each one is received.
Going On-the-Air
1. Follow steps 1 through 3 in Tuning in Morse Stations above.
2. Press the letter,
X
—this will key your transmitter and will automatically enter the DSP into the Converse
mode.
3. Start typing! Your message will be sent at the default rate of 20 wpm. (To change the default speed, see
MSPEED
. If you want to see the characters you’ve typed as they’re being sent, turn
EAS ON
.)
Note : The (
RETURN
) key won’t force a line-feed while in the Morse mode.
4. When your entire message has been typed, enter ( CTRL-D ) to tell the DSP when to turn off the transmitter.
The DSP will then return to the Command mode.
If you need to stop sending, enter (
CTRL-C
) to return to the Command mode,
R
, then a (
RETURN
) to shut down
your transmitter. If you have any remaining text that wasn’t sent, you’ll receive the error message:
***
Transmit data remaining
. To clear the rest of the message so it won’t be automatically sent when you
transmit again, enter TC ; TC clears the transmit buffer.
Calling CQ
As with the other modes, you can initiate a contact either by “calling CQ” or by answering a “CQ” made by another
station.
To call CQ, you must first tell your DSP to start transmitting.
1. Type
X
to key your transmitter.
2. Type in your CQ message like the one below, using your callsign:
CQ CQ CQ DE YOURCALL YOURCALL YOURCALL K ( CTRL-D )
10-2 September, 05