RS-232C Port Specifications

PC control of the TV

When a program is set, the TV can be controlled from the PC using the RS-232C terminal. The input signal (PC/AV) can be selected, the volume can be adjusted and various other adjustments and settings can be made, enabling automatic programmed playing. Attach an RS-232C cable cross-type (sold separately) to the supplied Din/D-Sub RS-232C for the connections.

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This operation system should be used by a person who is accustomed to using PCs.

Communication conditions

Set the RS-232C communications settings on the PC to match the TV’s communications conditions.

The TV’s communications settings are as follows:

Baud rate:

9,600 bps

 

 

Data length:

8 bits

 

 

Parity bit:

None

 

 

Stop bit:

1 bit

 

 

Flow control:

None

 

 

Communication procedure

Send the control commands from the PC with the RS-232C connector. The TV operates according to the received command and sends a response message to the PC. Do not send multiple commands at the same time. Wait until the PC receives the OK response before sending the next command.

Command format

Eight ASCII codes + CR

 

C1

C2

C3

C4

P1

P2

P3

P4

 

 

 

 

 

 

 

 

 

 

 

 

Command

 

 

Parameter

 

Return code

4-digits

 

 

 

4-digits

 

 

 

 

 

 

 

Command 4-digits: Command. The text of four characters.

Parameter 4-digits: Parameter 0–9, x, blank, ?

Parameter

Input the parameter values, aligning left, and fill with blank(s) for the remainder. (Be sure that 4 values are input for the parameter.) When the input parameter is not within an adjustable range, ERR returns. (Refer to “Response code format.”) Any numerical value can replace the x on the table.

0

0

0

0

9

 

 

 

 

2

3

0

 

 

 

 

 

 

 

 

 

1

0

0

 

 

 

 

 

 

 

 

 

0

0

5

5

 

 

 

 

When ? is input for some commands, the present setting value responds.

?

?

?

?

?

 

 

 

 

Response code format

Normal response

OK

Return code (0DH)

Problem response (communication error or incorrect command)

E R R

Return code (0DH)

78HP Pavilion LCD HDTV User’s Guide

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HP LC3200N 32 inch manual RS-232C Port Specifications, PC control of the TV

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