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RS-232 PROTOCOL
9600 Baud
8 bits
No parity
1 Stop 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).
21
Projector VHD-4403 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