This function electrically boosts the light sensitivity when there is insufficient illumination on the object. You can set the gain of the video amplifier according to the brightness of the object. Select the setting mode according to your shooting conditions.

Automatic Gain Mode (Automatic Gain Adjustment)
The gain of the video amplifier is automatically set according to the brightness of the subject.
A icon appears on the left side of the gain value in the AGC mode.
Setting the [FULL AUTO] switch to “ON” to enter the Full Auto mode also activates the Auto Gain mode. In this case, the Iris, Shutter and White Balance also enter into Auto mode forcibly.
The switching operation of the [GAIN L/M/H] switch is disabled in the Full Auto mode.
The upper limit of the gain setting value during AGC operation can be set in [Camera Function] [AGC Limit].
While in the Auto Gain mode, and [AE Lock] is set to “AE” or “AE/FAW”, a icon appears on the left side of the gain value during lock operation.
Manual Gain Mode (Manual Gain Switching)
Use the [GAIN L/M/H] switch to display the gain of the selected video amplifier.
The gain level appears on the screen.
The icon on the screen disappears.

The default positions of the switch are as follows.
[L]:
0 dB
[M]:
6dB
[H]:
12dB
You can change the gain value of each position in the menu. Increasing the sensitivity causes the screen to appear grainier.