Aurora Multimedia TV/FM Tuner manual Character Generator Commands, General Info

Bits D4-D1 (AFC4-AFC1) Read the 4 bits separate of the other bits for easy use. eg. (afc & 0x1E) then shift the bits 1 place to the right. This will give you a value of 0x00 to 0x0F. Follow the chart below to determine the signal.

Bit4	Bit3	Bit2	Bit1
0	1	1	1	-187.5kHz
0	1	1	0	-162.5kHz
0	1	0	1	-137.5kHz
0	1	0	0	-112.5kHz
0	0	1	1	-87.5kHz
0	0	1	0	-62.5kHz
0	0	0	1	-37.5kHz
0	0	0	0	-12.5kHz
1	1	1	1	+12.5kHz
1	1	1	0	+37.5kHz
1	1	0	1	+62.5kHz
1	1	0	0	+87.5kHz
1	0	1	1	+112.5kHz
1	0	1	0	+137.5kHz
1	0	0	1	+162.5kHz
1	0	0	0	+187.5kHz

Bit 0 -PONR 1 = Power on reset after supply breakdown 0 = After a successful reading of the status register

!CxxxFxxxxx<CR>	TV Channel Frequency setup for International version. !C002F05525<CR> for
	channel 2 to be set to a freq of 55.25MHz.

Character Generator Commands

It is sent as a black backround with white text similar to closed captioning.

!CTxxFxSxCxxHxxVxx-xxxxxxxxxxxxxxxxxxx<cr> Txx = 00 to 30, Fx = 0 or 1, Sx = 0 or 1, Cxx = 0 to 60, Hxx = 1 to 99, Vxx = 1 to 99, -xxxxxxxxxx = ASCII text up to 60 characters

This is the command that does it all.

T is text timeout which is up to 30 seconds. 00 is no timeout.

F is a function command. 0 does nothing but 1 will clear the entire OSD display S is character size ranging from 0 (normal) to 1 (Wide)

C is amount of characters to be displayed

H is Horizontal position (column) ranging from 01 to 99 V is Vertical position (row) ranging from 01 to 99

Anything after the - can be text up to 60 characters long. Hex 0x0A can be used to go to the next line if used in the sequence.

The following string will clear the screen then send the text Hello World on the 3 row starting at the 2nd column and timeout after 4 seconds with a text size of 0. !CT04F1S0C11H03V02-Hello World<cr>

It is best if using the text generator to turn off the OSD. If left on any command that utilizes the OSD will clear the last message sent. It is recommended when using the command to use timeouts since static images can burn into a display causing damage.

General Info

Unless otherwise noted all valid commands are echoed back if properly received unless the “***” address is used. When Main TV or FM channel is changed via remote or contact closure, the RS232 is updated by sending a ~MCHxxx<CR> or ~FCHxxxx<CR> response as long as the address is zero.

When Volume is changed via remote or contact closure, the RS232 is updated by sending a ~VOLxx<CR> response Invalid commands will reply with ~ERROR<CR> as long as the address is zero.

Convert the multi-digit ASCII decimal representation response to a true hexadecimal value. Ex. xx = 13 (0x31, 0x33) turn this into 0D. The bit information is once the ASCII to hexadecimal conversion has been done.

-10-