External Control Device Setup
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206-3825
07. Direct Channel Selection
- This command allows the RF channel number
to be set as well as allowing the controller to
select which base band input is active. The
command is structured as follows.
E4 : It is the start of the command and signifies
a direct channel command.
XX : It is the data byte that selects the channel
to be tuned.
YY : It is the checksum calculated by adding the
previous bytes together and truncating.
In order to select different source inputs a pre-
arranged channel number is used. The chan-
nel mapping is as follows:
Example;
To select the rear RGB video input, the data
byte would be 86 the hex representation of
134 decimal. The command would then be:
●
E48678
E4 : It is the start of the command and signifies
a direct channel command.
86 : It is the data byte to select the rear RGB
input
16A: It is the checksum calculated by adding
“E4” + “86” to get “6A” after truncating the
resulting “16A”.
The TV will perform the action and will not return
a response.
Note:
Not all input configurations will be available in
all products. When a non-valid input is select-
ed the unit should remain on the current input.
E4XXYY
Channel
Number Source
1 to 125
Traditional RF
131
Rear composite Video Input
132
Rear S-Video Input
133
Front RGB Video Input
134
Rear RGB Video Input
135
Not used
(Reserved for Scan Card Products)
136
Rear Y, Pb, Pr Component Input
137
Front S-Video
138
Not Used (Reserved for internal
Y, Pb, Pr Video Input)
139
Not Used (Reserved for internal
S-Video Input)
06. Set Volume Limits
- The command allows the maximum or minimum
volume limits to be set. The command is struc-
tured as follows:
EB : It is the start of the command and signifies
a volume limit command.
XX : It follows its the data byte that signifies if
it is the minimum or maximum value
being changed and the value that it is
being changed to.
YY : It is the checksum calculated by adding the
previous bytes together and truncating.
The data byte “XX” is defined as follows:
The upper two bits select the parameter
(00=start volume, 01 max volume limit, 10=min
volume limit) the lower 6 bits of data set the
actual volume level in a range of 0 to 3F hex.
Example;
To set the maximum volume level to 29 decimal
(about half of the 63 decimal range), the data
byte would be constructed in binary as follows
(MSB) 01011101 (LSB) or 5D hex. The com-
mand would then be:
●
EB5D48
EB : It is the start of the command and signifies
a volume limit command.
5D : It is the data byte to select the volume level
and to set the value to 29 decimal.
48 : It is the checksum calculated by adding
“EB” + “5D” to get “48” after truncating the
resulting “148”.
The TV will perform the action and will not return
a response.
- Upper Data Byte Mapping
00=Star Volume
01=Maximum Volume Limit
10=Minimum Volume Level
11=Start Volume=Last Volume
EBXXYY
