Sharp Car Video System PN-L803C LCD MONITOR User Manual

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42
E
Controlling the Monitor with a PC (RS-232C)
Setting of the GAMMA user data
n
To transfer the GAMMA user data
Use the user data transfer commands (UGRW, UGGW and
UGBW). For each of the R, G and B colors, divide the total
512 pieces of user data into 16 blocks, and transfer 32 pieces
of data with each command.
C1 C2 C3 C4 P1 P2 P3 P4
…
S1 S2
Command field
Block number (01 to 16)
Data fieldChecksum field
Example: To transfer the data of block 1 (0 to 31 levels)
of red (R) data
UGRW01000000010002 … 0031C0
Command
Block number
32 pieces of data Checksum
One piece of data consists
of 4 digits.
* If data is less than 4 digits, add a “0” (zero) to make it 4
digits.
* Thechecksumeldisthecharacterstring(ASCII)dataof
lower-order one byte which indicates the sum of the block
number and 32 pieces of data in hexadecimal (0 to F).
n
Saving the GAMMA user data
Usetheuserdatasavecommand(UGSV)tosavethe
transferred user data in the monitor.
If the data is not saved, it will be cleared when:
• Themainpowerswitchisoff
• STANDBYMODEisLOWPOWERandthemonitorenters
standby mode
n
Activating the GAMMA user data
Toactivatethetransferreduserdata,selectUSERforGAMMA
ofthePICTUREmenu,orsendthecorrespondingRS-232C
command.
n
Checking the GAMMA user data
Use the user data read commands (UGRR, UGGR and
UGBR) to return 512 pieces of user data for each of the R,
GandBcolors.Dividethedatainto16blocksandreturn32
pieces of data with each command. The value to be returned
is not the value stored in the monitor, but the value in the
temporary memory for display. (These values are the same
whentheuserdatasavecommand(UGSV)abovehasbeen
sent.)
TIPS
• TheuserdataisnotinitializedbyRESETofthePICTURE
menu.Toinitializetheuserdata,useALLRESETofthe
FUNCTIONmenu.
TheGAMMAuserdatainitializecommand(UGRS)allows
the initialization of the user data only.

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