GRASS VALLEY LDK 4000 MKII, User Manual

Page: 52 / 108

v1.0
LDK 4000 MKII User’s Guide | Operating instructions 5-12
5.7.3 Gain selection
Depending on the available light levels it may be necessary to adjust the gain of the camera.
The gain is selected via the
Gain switch on the left-front side of the camera.
1. When this switch is pressed initially, the current value of the gain in dB is displayed in the
viewfinder.
2. Holding the switch in the up or down position for a very short period selects one of the
five master gain settings: -, 0, +, ++ and +++.
– The actual value of the gain in dB is assigned to these symbols in the
INSTALL
menu.
– The Gain indicators in the viewfinder light to indicate the value selected. (The + and
++ indicators light when the gain is +++.)
Variable gain
The gain switch can also be used to vary the gain continuously between its minimum and
maximum value.
1. Hold the switch continuously in the up or down position until you see the value in the
viewfinder change in steps of 0.1dB.
2. Release the switch when you reach the value you want.
3. Using the switch momentarily again sets the gain to the nearest standard value.
5.7.4 Optical filter selection
A neutral density filter and a special effect filter can be placed in the path of the optical signal
to modify the incoming light. The filters are selected via the
Filter switches at the top-front of
the camera. These filters can be used, for example, to control depth of field or exposure levels.
The camera does not need colour optical filters to be able to white balance correctly. The range
of the auto-white balance is so wide (from 2.5K to 20K) that there is never any need to use
colour filters to obtain the correct white. Rotate the switches to move the optical filter wheels.
Symbol Gain
- is always -6 or -3dB
0
is always 0dB
+ can be set to 3, 6 or 9dB
++
can be set to 6, 9 or 12dB
+++ is always 12 dB