Runco virtual high definition processor with aspect ratio control RS-232 PROTOCOL, Projector

RS-232 PROTOCOL

9600 Baud

8bits No parity

1Stop bit

ASCII

RxD of the PC or TxD of the VHD is on pin2 TxD of the PC or RxD of the VHD is on pin3 Gnd is pin 5

RTS of the PC or CTS of the VHD is on pin7 (not used) CTS of the PC or RTS of the VHD in on pin8 (not used)

Command format <input><aspect ratio>
Inputs:		Aspect Ratios:	Power:
0	= Composite	A = Anamorphic	ON = Power on
1	= S-Video	L = LetterBox	OF = Power off
2	= Component	S = Standard (4:3)
3	= Pass Through	H = HDTV (for pass through)
		C = Computer (for pass through)

To keep the currently selected aspect ratio or input, replace the letter/number with a dash "-" Each command must be followed by a carriage return <CR>.

Examples:

2L will select the component input and change the aspect ratio to letterbox

-A will change the aspect ratio to anamorphic, but leave the input selection alone 1- will change the input to S-Video, but leave the aspect ratio alone

RS-232 Projector Control requires a cable terminated with male RJ-11 jacks at both ends. Wiring is the same as for a phone (ie. in a cross configuration).

Projector		VHD-4402 ULTRA
N.C.	1		6
GND	2		5	GND
RxD/TxD	3		4	RxD/TxD
RxD/TxD	4		3	RxD/TxD
GND	5		2	GND
N.C.	6		1

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