Instruction manual

Page 14
Configuring the TM-1327GE Camera
TM-1327GE Software
3.4.4 Gain Settings
The Gain Settings control box, shown in Figure 17, allows you to change the Gain value from -3dB to
12dB. To change the value, move the slider or enter the value directly into the text box.
Figure 17. Gain Settings
3.4.5 Offset (Black Level) Level Control
The offset level setting, shown in Figure 18, allows you to change offset voltage. To change the value,
move the slider or enter the value directly into the box.
Offset value determines the digital gain. Setting Vbottom above the zero level helps cut out some of the
infrared clutter and other noise on the lower end of the spectrum. Changing the Vbottom setting adjusts
the black level. Increasing the setting to a higher number causes the auto black level control to darken
the image, lowering the number lightens the image. A 0 setting is the lightest, and 255 is the darkest.
The graph below shows how a new Vbottom effectively creates a new sensitivity base point. Adjusting
the Vtop can also lighten or darken the image.
The built-in auto black level control adds tiny positive or negative voltages to both Vtop and Vbottom to
compensate black level changes due to temperature. Auto black level does not change the overall
system gain.
Figure 18. Offset Level