Tamarisk
®
640
Software ICD
48
allow more sensitivity but will also gain-up any system noise. A larger value will prevent
objectionable gaining-up of system noise but will reduce sensitivity in low-contrast scenes.
The AGC Gain Limit Noise Reduction Mode (which is an NV parameter) works to limit
the pixel-to-pixel difference and thus reducing the effects of noise across the entire scene.
This limit has the effect of smoothing out the image and hence the AGC provides a better
overall image.
It is possible (but not recommended) to enable both the AGC Gain Limit and the AGC
Gain Limit Noise Reduction mode. By default the AGC Gain limit is disabled and the
AGC Gain Limit Noise Reduction mode is enabled.
NOTE
This command has no effect if ICE is enabled.
Command Format:
Table 88 – AGC Gain Limit Set Command Format
Byte
Value
Description
1
0x01
Start of message.
2
0xD1
AGC Gain Limit Set Command ID.
3
0x02
Parameters length.
4,5
unsigned integer
0 to 4095
AGC gain limit value.
0 = gain limiting disabled
32 = gain limited to gain factor = 4.0
64 = gain limited to gain factor = 3.0
128 = gain limited to gain factor = 2.0
256 = gain limited to gain factor = 1.0
4095 (0x0FFF) = maximum (not recommended)
4
checksum
Frame check sequence.
Response Format:
Table 89 – AGC Gain Limit Set Response Format
Byte
Value
Description
1
0x01
Start of message.
2
0x02
ACK Response
3
0x02
Parameters length.
4, 5
0x00D1
AGC Gain Limit Set Command ID.
6
checksum
Frame check sequence.
