Sony RM-1000BP Operating Instructions Manual page 35

Gain adjustment
 GAIN key
The gain setting set on the video camera is applied by pressing this key.
 SELECT key
The gain mode applied by pressing the GAIN key can be changed.
Notes
When using a video camera that has a slide switch or lever switch, the gain setting can be
changed by changing the position of the switch or lever. The video camera setting changes to
that of the position of the switch on the video camera, if the accessory cable is disconnected
or the video camera power is cycled.
1-GB