FMA 300 Manual
2003 SRK Electronics Pty Ltd
4.11
Remote operation.
The FMA300 may be monitored remotely via the “TELEMTRY” connector on the rear of the
unit. This is an RS232 standard connection with the following characteristics:
Baud rate:
9600
Data bits:
8
Parity:
NONE
Stop bits:
1
Flow control:
NONE
The pinout for the DB9 connector is as follows: pin 2, transmit data, pin 3, receive data, pin 5,
common (0V). All other pins are not connected.
The FMA300 responds to the following commands. <CR> indicates the ASCII character 0D
hex. All letters are upper case, spaces (20 hex) are indicated by “_”. All commands must be
terminated by <CR>. Note that a line feed (0A hex) must not be sent before or after <CR>.
After a response is sent, a carriage return, line feed and “>” are sent.
FP?<CR>
Returns forward power in the form XXXW<LF><CR>>. For example:
FP?<CR>
(command)
300W<LF><CR>
(response from amplifier)
>
Note that for forward powers of 99W and below, the leading zero is replaced with a space
RP?<CR>
Returns reflected power in the form XXXW<LF><CR>>. For example:
RP?<CR>
(command)
_00W<LF><CR>
(response from amplifier)
>
Note that for reflected powers of 99W and below, the leading zero is replaced with a space.
IP?<CR>
Returns the input power in the form XX.XW<LF><CR>>. For example:
IP?<CR>
(command)
_7.5W<LF><CR>
(response from amplifier)
>
Note that for input powers of 9.9W and below, the leading zero is replaced with a space.
AT?<CR>
Returns the amplifier heatsink temperature in the form XXXC<LF><CR>>. For example:
AAT?<CR>
(command)
_32C<LF><CR>
(response from amplifier)
>
Note that for temperatures of 99C and below, the leading zero is replaced with a space.
AI?<CR>