LG Electronics 2230R-MA manual Step

MFL41469212-Edit2-en5-mi 4/28/09 11:27 AM Page 80

APPENDIX

APPENDIX

21 . Tune Command (Command: m a)

Example)

Tune Channel to following Physical/major/minor number

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

Transmission [m][a][ ][Set ID][ ][Data0][ ][Data1]

ture

[ ][Data2][ ][Data3][ ][Data4][ ][Data5][Cr]

Command: ma 00 23 xx xx xx xx 01

attribute(0x01): main picture, two part(it’s not mandatory),

Data 0: Physical Channel Number(Transmit by Hexadecimal

using physical channel, NTSC cabl xx’ data: don’t care major

code)

and minor channel number in case analog channel tuning

NTSC air: 02~45

NTSC cable: 01, 0e~7d

Acknowledgement[a][ ][Set ID][ ][OK][Data0][Data1]

Data1, Data2: Major

Channel Number(two part) or

[Data2][Data3][Data4][Data5][x][a][ ][Set ID]

Channel Number(one part)

Data1: High byte

[ ][NG][Data0][x]

Data2: Low byte

Two part channel number: Major number-Minor number

One part channel number:

In case of using one part channel number, minor chan-

nel does not need.

Data3, Data4: Minor Channel Number

Not needed for NTSC.

Data3: High byte

Data4: Low byte

Data5:

Attribute

7

Main/Sub

6

Two/One

5

Using Physical

4

3

2

1

0

Step

Picture

Part Channel

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

*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).

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