Meridian Audio manual Meridian DSP420 RS232 Interface, General Information, Basic Functions

DSP420 RS232

Information

Data from DS 6ii03

Meridian DSP420 RS232 Interface.

General Information

The RS232 interface for the DSP420 can be operated from any terminal that operates at 9600 baud with 1 start bit, 1 stop bit and no parity. Commands take the form of 2 ASCII characters, in some cases followed by a signed argument (‘nn’ below). All characters are echoed by the speaker. A carriage return character will execute the command and backspace is also implemented. When a command is executed, the speaker will return 8 characters.

Basic Functions

The following tables list the basic commands available and show examples of the messages returned. In each case the message retuned via RS232 corresponds with the display on the front panel of the processor.

Source Commands

RS232 Command	Description		Message Returned
CD	Select CD source	CD	65
RD	Select Radio	Radio 65
LP	Select LP	LP	65
TV	Select TV	TV	65
T1	Select Tape 1	Tape1 65
T2	Select Tape 2	Tape2 65
CR	Select CDR	CDR	65
CB	Select Cable	Cable 65
DV	Select DVD	DVD	65
V1	Select VCR 1	VCR1	65
V2	Select VCR 2	VCR2	65
LD	Select Laser Disc	LDisc 65

Volume Commands

RS232 Command	Description		Message Returned
VP	Volume +	CD	66
VM	Volume -	CD	64
VNnn	Go to volume (1-99)	CD	87
MU	Mute	Mute
SB	Standby	Standby
POnn	Position Setting, 0=Normal, 1=High, 2=Corner	Normal
BNnn	Bass setting	B.	+2.0
TNnn	Tilt Setting	T.	-3.0
LNnn	Balance setting	L.	+3
%inn	Input 1=D1, 2=D2	Input D1
PHnn	Phase	Phase +

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