tag substitutions have taken place. Furthermore, substituted characters must follow the rules of
the JT9 protocol, concerning which characters are permissible in messages.
Example:
JT9 1 10145000 “AB2CD”
Transmits JT9-1 on 10.145MHz with message “AB2CD”.
Note that a JT9 transmission command will automatically wait for the appropriate time to start
transmitting, according to the JT9 protocol.
JT65 statement
Transmits the JT65 family of sub-modes. The format of the JT65 statement is
JT65 <sub mode> <frequency> <message>
The <sub mode> parameter defines the variant of JT65, and expects values as follows:
Sub mode Explanation
0
JT65-A
1
JT65-B
2
JT65-C
<frequency>
is the transmission frequency in Hz.
<message>
is the text to transmit, and may contain #-tags as explained above. JT65 messages
are a maximum of 13 characters. Remember that this is the message length AFTER any dynamic
#-tag substitutions have taken place. Furthermore, substituted characters must follow the rules of
the JT65 protocol, concerning which characters are permissible in messages.
Example:
JT65 0 10145000 “AB2CD”
Transmits JT65-A on 10.145MHz with message “AB2CD”.
Note that a JT65 transmission command will automatically wait for the appropriate time to start
transmitting, according to the JT65 protocol.
WSPR statement
Transmits the WSPR family of sub-modes. The format of the WSPR statement is
WSPR <sub mode> <frequency> <power> <callsign>
The <sub mode> parameter defines the variant of WSPR, and expects values as follows:
Sub mode
Explanation
2
Standard WSPR (a.k.a. WSPR-2)
4
Extended mode WSPR, sends two WSPR messages, and 6-char subsquare etc
15
15-minutes SLOW WSPR (for use on LF)
U4B operating manual Rev 1.00
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