LG Electronics 3LB5D Step, Transmission mb Set ID DataCr, Acknowledgement b Set ID OK/NGDatax

Data5:	7	Main/Sub	6	Two/One	5	Using Physical	4	3	2	1	0	Step
				Part Channel
		Picture				Channel	Reserved
	0	Main	0	Two	0	Use	x	0	0	0	0	NTSC Air
	1	Sub	1	One	1	No Use	x	0	0	0	1	NTSC Cable
							x	0	0	1	0	ATSC Air
							x	0	0	1	1	ATSC Cable_std
							x	0	1	0	0	ATSC Cable_hrc
							x	0	1	0	1	ATSC Cable_irc
							x	0	1	1	0	ATSC cable_auto
							x	0	1	1	1	Reserved
							x	x	x	x	x	...
							x	1	1	1	1	Reserved

All data are transmitted by Hexadecimal code

*Two/One part Channel: 6th bit

This bit is used in a cable-ready system.

*Using physical channel: 5th bit

If the channel band is NTSC air or NTSC cable, channel tuning can be done by only physical channel. In this case, using physical channel bit must be low(0).

But if the channel band is ATSC air or ATSC cable, there are two cases that physical channel enable or disable.

If the physical channel sending is meaningful, you should set this bit low(0). If the physical channel sending is meaningless, you should set this bit high(1).

Example)

1.Analog channel: NTSC cable, channel number(35),

main picture Command: ma 00 23 xx xx xx xx 01

attribute(0x01): main picture, two part(it’s not mandatory), using physical channel, NTSC cable ‘xx’ data: don’t care major and minor channel number in case analog channel tuning.

2.Digital channel: ATSC air, channel number(don’t know physical channel, major(30), minor(3)), sub picture Command: ma 00 xx 00 1E 00 03 A2 attribute(0xA2): sub picture, two part, not using physical channel, ATSC air ‘xx’ data: don’t care analog channel number in case digital channel tuning.

22.Channel Add/Del (Command: m b) To add and delete the channels

Transmission [m][b][ ][Set ID][ ][Data][Cr]

Data 0: Channel Delete Data 1: Channel Add

Acknowledgement [b][ ][Set ID][ ][OK/NG][Data][x]

23. Key (Command: m c)

To send IR remote key code.

Transmission [m][c][ ][Set ID][ ][Data][Cr]s Data Key code: Refer to page 99.

Acknowledgement [c][ ][Set ID][ ][OK/NG][Data][x]

24.Input select(Command: x b) (Main Picture Input) To select input source for TV.

Transmission [x][b][][Set ID][][Data][Cr]

Data 00 : DTV (Antenna)		Data 01 : DTV (Cable)
Data 10 : Analog (Antenna)		Data 11 : Analog (Cable)
Data 20	: AV1	Data 21	: AV2
Data 40	: Component 1	Data 41	: Component 2
Data 60 : RGB-PC		Data 90 : HDMI1
Data 91 : HDMI2		Data 92 : HDMI3

Acknowledgement [b][ ][Set ID][ ][OK/NG][Data][x]

APPENDIX

3.Digital channel: ATSC air, channel number(physi- cal(20),major(20), minor(3)), sub picture Command: ma 00 14 00 14 00 03 82

attribute(0x82): sub picture, two part, using physical channel, ATSC air

Acknowledgement[a][ ][Set ID][ ][OK][Data0][Data1] [Data2][Data3][Data4][x][a][ ][Set ID]

[ ][NG][Data0][x]

25. Back light(Command: m g)

To adjust screen back light.

Transmission [m][g][][Set ID][][Data][Cr]

Data Min:0 ~ Max:64

Acknowledgement [g][ ][Set ID][ ][OK/NG][Data][x]

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