Extron Electronics RGB 300 - Manual (Page 26)

Appendix A • Programmer's Guide Appendix A • Programmer's Guide
Extron RGB 300 Universal Interface • User’s Manual Extron RGB 300 Universal Interface • User’s Manual
To convert this use the where data1 = 141:
1. disregard bit 7 (or subtract 128 from data1). (141 - 128 =
13)
2. divide step 1 result by ten. (13/10 1.3, this is version)
CMD5 (35) - Report Actual Sync Code
The Host asks the RGB 300 for the sync code being used.
(This is the programmed code modified by the sync auto-
select circuit.) The RGB 300 sends a data byte containing the
sync code.
Format:
CMD5, CKS1, CKS2, EOT
(35h), (80h), (B5h), (04h)
Response:
CMD5, ERC, data1, CKS1, CKS2, EOT
Where:
data1 is encoded same as CMD3.
CMD6 (36) - Report Video Level
The Host asks the RGB 300 for the current video level. The
RGB 300 responds with two data bytes: one for the ± sign,
and the other is a number for the level.
Format:
CMD6, CKS1, CKS2, EOT
(36h), (80h), (B6h), (04h)
Response:
CMD6, ERC, data1, data2, CKS1, CKS2, EOT
Where:
data1= sign byte: 81h = level is positive; 82h = level is
negative.
data2 = the number for the level, + 80h
Note: If data2 is 80h, the level number is zero and the level adjustment is
in the middle of its range.
Example:
if Level = -67 then response will be:
CMD6, ERC, data1, data2, CKS1, CKS2, EOT
(36h), (80h), (82h), (C3h), (83h), (FBh), (04h)
A-11
Using Commands - CMD5,6
CMD7 (37) - Set Video Level
The Host tells the RGB 300 to set the video level. The
command includes two data bytes that provide this
information. The data bytes are codes the same as in CMD6.
Format:
CMD7, data1, data2, CKS1, CKS2, EOT
(37h), (xx), (xx), (xx), (xx), (04h)
Where:
data1 = sign byte, 81h sets a positive video level;
82h sets a negative level.
data2 = the number for the level, + 80h
Example:
To set the video level to +50d (see table on page A-5) then:
a. data1 = 81h (sign is positive)
b. data2 = B2h, or, (50 = 32+16+2 = 32h + 128)
c. send the following transmission:
CMD7, data1, data2, CKS1, CKS2, EOT
(37h), (81h), (B2h), (82h), (EAh), (04h)
Response:
CMD7, ERC, CKS1, CKS2, EOT
CMD8 (38) - Report Horizontal Shift
The Host asks the RGB 300 for the horizontal information.
The RGB 300 responds with three data bytes: one for
“enabled” status, one for polarity (±) and one for the numeric
value.
Format:
CMD8, CKS1, CKS2, EOT
(38h), (80h), (B8h), (04h)
Response:
CMD8, ERC, data1, data2, data3, CKS1, CKS2, EOT
Where:
data1 = enable byte, if 81h, shift is on, if 80h, shift is off.
data2 = sign byte: 81h = shift is positive; 82h = shift is
negative.
data3 = horizontal shift value, plus 80h
____ If data3 is 80h, the level number is zero and the horizontal shift
adjustment is in its center position.
Example: if Horz. Shift = +22 and On, then response will be:
CMD8, ERC, data1, data2, data3, CKS1, CKS2, EOT
(38h), (80h), (81h), (81h), (96h), (84h), (D0h), (04h)
A-12
Using Commands - CMD7,8