Yaesu FT-450D Reference Book page 3

CAT
( C
A computer control command is composed of an alpha-
betical 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 14250000
 
Command Parameter
There is three for the FT-450D Command as shown below:
Set command: Set a particular condition
Read command: Reads an answer
Answer command: Transmits a condition
For example, note the following in the case of the FA com-
mand (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
transceiver:
"FA14250000;" (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:
"FA14250000;" (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.
FT-450D CAT O
PERATION
A
OMPUTER IDED
C
ONTROL
;

Terminator
(to the FT-450D)
(from the FT-450D)
(from the FT-450D)
R B
EFERENCE OOK
T
RANSCEIVER
C
OMMAND
Parameters
Parameters are used to specify information necessary to
implement the desired command.
The parameters to be used for each command are prede-
termined. The number of digits assigned to each param-
eter is also predetermined. Refer to the "Control Com-
mand List" and the "Control Command Tables" to con-
figure the appropriate parameters.
When configuring parameters, be careful not to make the
following mistakes.
For example, when correct parameter is "IS0+1000" (IF
SHIFT):
IS01000;
Not enough parameters specified (No direction (+)
given for the IF shift)
IS0+100;
Not enough digits (Only three frequency digits
given)
IS0_+_1000;
Unnecessary characters between parameters
IS0+10000;
Too many digits (Five frequency digits given)
Note: If a particular parameter is not applicable to the FT-
450D, the parameter digits should be filled using any char-
acter 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.
O
)
PERATION
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