Supplement
Basler A202k High Gain 3
DRAFT
3 Gain Changes
3.1 Larger Gain Range
The major difference between the standard camera and the high gain version is the gain range.
On standard cameras, the gain can be programmed on a decimal scale that ranges from 288 to
569 (0x0120 to 0x0239). At the highest gain setting on a standard camera, the gain will be 12 dB.
On the high gain version, gain can be programmed on a decimal scale that ranges from 288 to
1023 (0x0120 to 0x03FF). The settings result in the following amplifications:
If you know the decimal number (DN) setting for the gain on a high gain camera, the equivalent
decibel value can be calculated using the following equations:
Decimal Number (DN) Hexadecimal dB Factor
288 0x0120 0 x1
1023 0x03FF 28.06 x25
Table 1: Gain Settings on a High Gain Camera
L
In normal operation, a gain setting lower than 288 (0x0120) should not be used.
When the gain setting is lower than 288, the sensor output signal that is mapped to
the input of the ADCs will not be linear.
Gain in dB 20 log
10
658 DN +
658 DN –
----------------------------
⎝⎠
⎛⎞
8.15–=
When DN setting = 288 ... 511
Gain in dB .0354 (DN) 8.15–=When DN setting = 512 ... 1023
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