If you find that your KAM’98 prints a lot of Es and Ts while receiving, try set
-
ting the CWBAND command to a smaller value. This narrows the input bandpass
filter on the KAM’98, and while it makes tuning a bit more difficult, it eliminates
much of the noise that results in poor copy. If a properly tuned CW signal on
your radio results in the tone being received at some frequency other than 750
Hz, you can change the KAM’98 center frequency using the CWTONE com
-
mand.
Transmitting CW
To transmit CW with your KAM’98, you must wire the KEY OUT pin from the
radio port of KAM’98 to the key jack on your transceiver. The KAM’98 uses a
relay to provide a ground on this pin when sending CW, and therefore you must
turn OFF any internal electronic keyer in your radio. Be sure to have your radio
in the CW mode. You must also have your radio set for VOX operation so that it
will actually transmit any time the KAM’98 closes the KEYOUT relay. If you
prefer (or need) to have the KAM’98 directly key the radio into transmit, set the
CWPTT command ON and be sure you have the PTT line of the KAM’98 con-
nected to the PTT input to your radio. In this mode, you do not need the radio set
for VOX operation.
It is also possible to generate tone CW (audio tones applied to the microphone in-
put of your radio). This is most useful when sending code on an FM radio (i.e., 2
meters) for code practice or when connecting the KAM’98 to an amplifier and
speaker for local code practice. To use this mode, you must set the CWPTT com
-
mand ON and the CWAUDIO command ON. The tone is frequency controlled by
the CWTONE command.
To begin transmitting CW, type <Ctrl+C>T to place the KAM’98 in the transmit
mode. Type your message on the keyboard, followed by <Ctrl+C>E. This causes
the KAM’98 to transmit your message and return to the receive mode when all of
the message has been transmitted.
In CW operation, several prosigns (character combinations) are used to indicate
end of message, break, wait, and many other common phrases. To transmit these
phrases with the KAM’98, type the keystroke shown to send the pre-defined
prosign.
Non-Packet Modes of Communication CW Operation
User’s Guide 124 KAM’98 v 8.3
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