Prestel FM-42H2A User Manual page 18

▪ RS232 Setting 1 and RS232 Setting 2
Select the desired tab and configure the RS232 port settings to match the
display device requirements. Select either ASCII or HEX for the command
format and enter the Power Off and Power On commands with the appropriate
command termination mode: None, CR, LR or CRLF.
If the display device is connected to the respective RS232-A or RS232-B port,
use the Test buttons to confirm that the command is correct. Once the
command is valid, use the Save button to store those commands in the Matrix.
Note that ASCII commands can use any ASCII character, but HEX command
must use hexadecimal notation using hexadecimal value pairs separated by
spaces.
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