Yaesu FTDX10 Reference Manual page 5

CAT
( Computer Aided Transceiver )
A computer control command is composed of an alphabetical command, various parameters, and the terminator
that signals the end of the control command.
Example: Set the VFO-A frequency to 14.250000 MHz.
FA 014250000 ;
 
Command Parameter Terminator
There are three commands for the FTDX10 as shown below:
Set command: Set a particular condition
Read command: Reads an answer
Answer command: Transmits a condition
For example, note the following case of the FA command (Set the VFO-A frequency):
 To set the VFO-A frequency to 14.250000 MHz, the following command is sent from the computer to the trans-
ceiver:
"FA014250000;" (Set command)
 To read the VFO-A frequency, the following command is sent from the computer to the transceiver:
"FA;" (Read command)
 When the Read command above has been sent, the following command is returned to the computer:
"FA014250000;" (Answer command)
Alphabetical Commands
A command consists of 2 alphabetical characters.
You may use either lower or upper case characters. The commands available for this transceiver are listed in the
"PC Control Command Tables" on the following pages.
Parameters
Parameters are used to specify information necessary to implement the desired command.
The parameters to be used for each command are predetermined. The number of digits assigned to each param-
eter is also predetermined. Refer to the "Control Command List" and the "Control Command Tables" to configure
the appropriate parameters.
When configuring parameters, be careful not to make the following mistakes.
For example,
when the correct parameter is "IS00+1000" (IF SHIFT):
IS001000;
Not enough parameters specified (No direction (+) given for the IF shift)
IS00+100;
Not enough digits (Only three frequency digits given)
IS00_+_1000;
Unnecessary characters between parameters
IS00+10000;
Too many digits (Five frequency digits given)
Note: If a particular parameter is not applicable to the FTDX10, the parameter digits should be filled using any
character except the ASCII control codes (00 to 1Fh) and the terminator (;).
Terminator
To signal the end of a command, it is necessary to use a semicolon (;). The digit where this special character must
appear differs depending on the command used.
Control Command

(to the FTDX10)
(from the FTDX10)
(from the FTDX10)
4
Operation