HP LC3700N - Manual (Page 88)

78 HP Pavilion LCD HDTV User’s Guide
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.
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:
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
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.
When ? is input for some commands, the present
setting value responds.
Response code format
n
This operation system should be used by a
person who is accustomed to using PCs.
Baud rate: 9,600 bps
Data length: 8 bits
Parity bit: None
Stop bit: 1 bit
Flow control: None
C1 C2 C3 C4 P1 P2 P3 P4
Command
4-digits Parameter
4-digits Return code
Eight ASCII codes + CR
0 0 5 5
1 0 0
2 3 0
0 0 0 9
0
? ? ? ?
?
O K
Normal response
Return code (0DH)
E R R
Problem response
(communication error or incorrect
command)
Return code (0DH)