LG M5520C Owner's Manual page 85

Controlling the Multiple Product
RS-232C RS-232C
Output waveform
single pulse, modulated with 37.917kHz signal at 455kHz
Tc
T1
Configuration of frame
1st frame
Lead Low
code custom code
C0 C1 C2 C3 C4 C5 C6 C7 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
Repeat frame
Repeat code
Lead code
9 ms
Repeat code
9 ms
Bit description
Bit "0"
0.56 ms
1.12 ms
Frame interval : Tf
The waveform is transmitted as long as a key is depressed.
Tf
Tf = 108 ms @ 455 kHz
IR Codes
Remote Control IR Code
FCAR = 1 / Tc = fosc / 12
Duty ratio = T1 / Tc = 1 / 3
High
Data code
custom code
Tf
4.5 ms
0.55ms
2.25 ms
Bit "1"
0.56 ms
Tf
A31 A31
Carrier frequency
Data code
2.24 ms