Elecraft XG3 RF - Manual (Page 19)

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Host sends: V;
XG3 sends: V,1.00;
Host sends: F;
XG3 sends: F,00014025000;
Host sends: M,01,00003850000;
XG3 sends: nothing
Host sends: M,01;
XG3 sends: M,01,00003850000;
Command Entry, Arguments and Device Limits
 Commands consist of a single letter and may be followed by additional arguments.
 Commands and arguments may be entered in either upper or lower case.
 Arguments are delimited with a space or comma (,).
 Arguments follow the command after a comma (,). See examples above.
 Frequencies are entered and displayed using an 11 digit representation, pre-pended with zeros. (0).
Example: 14.025 MHz would be displayed/entered as: 00014025000
 The setter/getter convention is used.
 If an unknown command is entered, the XG3 will simply ignore the command and do nothing.
 If a command is ill formed, the XG3 will ignore the command and do nothing.
 There are currently 12 frequency memory locations, 0 to 11. Location 0 is associated with the
160M LED, and location 11 is associated with the 2M LED. (See Y command for list.)
 Currently the XG3 has a fundamental frequency range of between 1.5 and 200 MHz. Frequencies
above 200 MHz may be generated by simply entering them into the XG3. The XG3 will
automatically compute the necessary frequency that will generate the 3
rd , 5 th or 7 th harmonic
needed. In other words, you can simply send whatever frequency you want (between 1.5 and 1400
MHz) and the XG3 will figure it out. Frequencies that rely on the 3
rd , 5 th and 7 th harmonics will
have substantially lower amplitudes than what is indicated.
 Since the XG3 generates a square wave output, strong odd harmonics are present on the output.
This can be used as a feature as frequencies outside usable range can be generated. For example
the 70cm band is a 3rd harmonic of the 2m band (see above, regarding harmonics).
 Four (4) output levels are available: 03 = -107, 02 = -74, 01 = -33 and 0 = 0 dBm. See Level
command.
 Backspaces and other control characters are not supported.