Nominal Gain
The nominal gain is the one that causes a full-scale response at the digitizer output when the luminance part of the applied video signal is exactly 0.7 V.
The table below fully defines the nominal gain condition:
|
Analog video signal |
Condition |
Digitized value |
|
|
8-bit digitizer |
10-bit digitizer |
||
|
Black |
Luminance level is equal to blanking level |
0 |
0 |
|
White |
Luminance level is 0.7 V above blanking level |
255 |
1023 |
To establish the gain of all camera taps to the nominal value, set the GainCtl parameter to 0DB and all involved GainTrim1, GainTrim2 and GainTrim3 parameters to zero.
An alternative way is to set the GainCtl parameters to LIN, the Gain parameter to 1000 and all involved GainTrim1, GainTrim2 and GainTrim3 parameters to 0.