Mitsubishi Electric KD Series User Manual page 80

5-2 Setting⑬: PGA
Address Register name
70A0h DegitalGainEnable
70A4h DegitalGain_R
70A8h DegitalGain_G
70ACh DegitalGain_B
5-2-15 PGA
[Funcion]
Amplify image signals for whole pixels in a line by the
designated magnification . Adjustable from 0 to 4.0 times
for each color.
This amplification is performed by digital calculation.
Thereby, Signal level increases by PGA function, but noise
level also increases same as signal amplification.
Amplify signal output for whole pixels Amplify signal output for whole pixels
pixel
TM-XJ959A
R/W Parameter
Data
Set PGA On/Off
R/W 0 or 1
0:OFF /1:ON
Set a value of Red PGA (0 to 4.0)
R/W -1024 to 3071
R/W -1024 to 3071 Set a value of Green PGA (0 to 4.0)
R/W -1024 to 3071 Set a value of Blue PGA (0 to 4.0)
amplification
Function
Output data ＝ Input data ×
[Remark]
1) When you apply PGA with each color's output, be
careful about White balance of color scanning.
2) The register value at "DegitalGain_R,G,B" is defined to
be a "Signed integer". When you set the register values
based on hex number, make sure the sign of "Positive
(+) " or "Negative (-)" of the register value.
A setting example: Register parameter data
= -2（decimal digit） = FFFFFFFEh(hex digit)
Initial
0
1024 + Register value
0
1024
0
0
80
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