LG Electronics 50PX2DC Channel Add/Del Command m b, Input selectCommand x b Main Picture Input

*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 tun- ing 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 01attribute(0x01): main picture, two part(it’s not mandatory), using physical chan- nel, 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 phys-

ical channel, major(30), minor(3)), main picture Command: ma

00 xx 00 1E 00 03 22 attribute(0x22): main picture, two part,

not using physical channel, ATSC air ‘xx’ data: don’t care ana- log channel number in case digital channel tuning.

3. Digital channel: ATSC air, channel number(physical(20),major(30), minor(5)), main picture Command: ma 00 14 00 1E 00 05 02 attribute(0x02): main pic- ture, two part, using physical channel, ATSC air.

Acknowledgement

[a][ ][Set ID][ ][OK][Data0][Data1][Data2][Data3][Data4][Data5][x] [a][ ][Set ID][ ][NG][Data0][x]

23. Channel Add/Del (Command: m b)

GTo add and delete the channels

Transmission

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

Data 0: Channel Delete

1: Channel Add

Acknowledgement

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

25. Input select(Command: x b) (Main Picture Input)

GTo select input source for TV. Transmission

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

Data Structure

Acknowledgement

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