LG 55LW9800 Owner's Manual page 138

digital channel number, the Major is the number that
the channel should be mapped to, and the Minor is
the sub-channel. Since the ATSC tuner automatically
maps the channel to the Major number, the Physical
number is not required when sending a command.
Data 00: Physical Channel Number
NTSC air: 02~45, NTSC cable: 01, 0E~7D
ATSC air: 01~45, ATSC cable: 01~87
Data 01 & 02: Major Channel Number
Data 01: High byte
Two bytes are available for the Major and Minor,
normally only the second byte is used.
Data 03 & 04: Minor Channel Number
Not needed for NTSC.
The table lists the binary code which must be
converted to Hexadecimal before sending. For
example:
The binary code to tune the sub source to an NTSC
cable channel is 1000 0001 , which translates to
81 in Hex.
*
7th bit : For which source do you want to change
the channel.
*
6th bit: Use a two part or one part channel. Most
cases just use 0 since it s ignored when using
NTSC.
*
5th bit: Use 0 with NTSC since it can only use the
physical channel number. Normally use 1 for ATSC
since most times it doesn t matter what the
physical number is.
*
4th bit: Set to 0.
*
3-0 bits: Choose signal type.
* Tune Command Examples:
1. Tune to the analog (NTSC) cable channel 35.
Data 00 = Physical of 35 = 23
Data 01 & 02 = No Major = 00 00
Data 03 & 04 = No Minor = 00 00
Data 05 = 0000 0001 in binary = 01
Total = ma 00 23 00 00 00 00 01
2. Tune to the digital (ATSC) local channel 30-3.
Data 00 = Don t know Physical = 00
Data 01 & 02 = Major is 30 = 00 1E
Data 03 & 04 = Minor is 3 = 00 03
Data 05 = 0010 0010 in binary = 22
Total = ma 00 00 00 1E 00 03 22
24. Channel Add/Del (Command: m b)
To add and delete the channels.
Transmission [m][b][ ][Set ID][ ][Data][Cr]
Data 00: Channel Delete Data 01: Channel Add
Acknowledgement [b][ ][Set ID][ ][OK/NG][Data][x]
25. Key (Command: m c)
To send IR remote key code.
Transmission [m][c][ ][Set ID][ ][Data][Cr]
p.130
See .
Acknowledgement [c][ ][Set ID][ ][OK/NG][Data][x]
When TV is in the standby mode, TV will turn on by
POWER button of remote control only.
26. Backlight (Command: m g) (
To adjust screen backlight.
Transmission [m][g][ ][Set ID][ ][Data][Cr]
Data Min:00 ~ Max:64 (*transmit by Hexadecimal
code)
*Refer to Real data mapping .
Acknowledgement [g][ ][Set ID][ ][OK/NG][Data][x]
Data 02: Low byte
)