4.9.5 Transmit statements: CW, HELL, JT9, JT65, WSPR, TELE
The family of transmit statements causes the U4B to transmit on radio frequencies. The
statements requires a number of parameters, which specify the transmission mode, sub-mode,
frequency, and parameters specific to that transmission mode.
The following sections explain each transmission mode and the relevant parameters.
CW statement
Transmit a message using CW, FSKCW, QRSS or DFCW modes
Syntax:
CW <sub mode> <frequency> <speed> <FSK> <Message string>
The <sub mode> parameter expects values as follows:
sub mode Explanation
0
Plain full-speed CW
1
QRSS: slow speed CW (on/off keyed)
2
FSKCW: slow speed frequency shifted CW (shift on key-down)
3
DFCW: dual frequency slow CW (dit and dah on different frequency shifted tones)
<frequency>
is the transmission frequency in Hz.
<speed>
is the standard Words Per Minute speed for CW sub mode; or for the other slow-speed
modes is the number of seconds per “dit”.
<FSK>
is the frequency shift specification for FSKCW and DFCW sub modes; it is ignored for CW
and QRSS sub modes.
The Message is the text to transmit, and may contain #-tags as explained previously. The
maximum message string length is 64 characters. The actual transmitted message may be more
than this once the dynamic #-tags are substituted.
Example:
CW 0 10106000 12 0 “AB2CD”
Transmits 12wpm CW on 10.106MHz with message “AB2CD”.
CW transmissions can also contain customized frequency shifts which
make it possible to transmit patterns. A customized section of
message starts and ends with an asterix character. The first two digits
represent the duration of each symbol, and subsequent characters
represent the upward shift from the transmit frequency baseline, 1Hz
per unit e.g. 1 means +1Hz, 2 means +2Hz, A means +10Hz etc up to
a maximum of Z for +36Hz shift.
Example:
CW 0 14096920 5 0 "*01IFLCNAP8Q7R65S0S0S5R6R7Q8PANCLFI*"
Transmits the Balloon glyph pattern shown in the photograph.
U4B operating manual Rev 1.00
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