PANASTEREO CX230, Owner'S Manual

PANASTEREO CX230 CINEMA MONITOR

PANASTEREO CX230 CINEMA MONITOR

PANASTEREO CX230 CINEMA MONITOR

PANASTEREO CX230 CINEMA MONITOR

REFERENCE DATA

Serial Interface Protocol Description

The CX230 is equipped with a standard RS232 serial communications port using a 9 pin D-sub
connector.  The data format is fixed and is in the following format:
One start bit, eight data bits, one stop bit, no parity, 9600-baud.

Command String Format

“Input select” and “volume set” commands are constructed using a seven-character ASCII string.
Commands start with a colon followed by a four-character command terminated with a carriage
return, and a line feed character which are also valid if they occur in reverse order.  (This is to
allow compatibility with languages that do not provide easy control of the order of these
characters).  The “request to send A-D level” command is a single character “ampersand” (&).
When a “Request to send A-D level” command is received the CX230 will respond with a two
character ASCII string starting with a colon followed by an eight bit value.

When the CX230 detects a command start character (a colon), a timer is started and if the rest of
the command including the end characters (CR/LF) is not received within 200mS then the serial
port is ignored until another valid start character is seen. If the command is unknown, then it is
ignored.

The seven characters in the command string each serve the following functions:
The first character is a colon and is the start character
The second to fifth characters represent the function command, which is a mnemonic style
command derived from the function to be performed.
The sixth and seventh characters are a carriage return and a line feed character.

Input Select Commands:

MLEF

Select Left Channel monitor input

MCEN

Select Centre Channel monitor input

MRIG

Select Right Channel monitor input

MLSU

Select Left Surround Channel monitor input

MRSU

Select Right Surround Channel monitor input

MSUB

Select Sub-Bass Channel monitor input

MMIX

Select Mix

MAMP

Select Amplifier Inputs

MPRO

Select Processor Inputs

MMUT

Select Mute

Set Volume Commands:

MVxx

Set volume to xx, where xx is a number from “00” to “99”.