Gain (Sensitivity) Adjustment - JVC GY-DV5000 Instructions Manual

12-5 Gain (Sensitivity) Adjustment

The gain should be switched when the brightness is insufficient due to poor lighting conditions.
GAIN SWITCHING
GAIN switch
AUTO IRIS FULL AUTO BLACK
BACK L
NORMAL
SPOT L
POWER
VTR
ON OFF
CAUTION:
When gain is set to "ALC", gain is boosted automatically
as the illumination becomes darker. However, noise will
increase a little because the screen becomes brighter as
the ALC (Auto Level Control) function boosts the gain more
than in the case of manual adjustment.
GAIN BOOST UNDER LOLUX CONDITION
LOLUX on/off button
AUTO IRIS FULL AUTO BLACK
BACK L
NORMAL
SPOT L
POWER VTR
ON OFF
Relationship between gain, iris and shutter
0.2 Lx 8 Lx
36 dB
LOLUX
12. FEATURES OF THE CAMERA SECTION
LOLUX
MODE
STRETCH
VTR
NORMAL
COMPRESS
CAM
LOLUX
MODE
STRETCH
VTR
NORMAL
COMPRESS
CAM
32 Lx
FULL AUTO SHOOTING
12dB 0 dB
ALC AUTOMATIC IRIS
F1.4
This switch allows the gain to be boosted when the illumination
of the subject is insufficient.
Switch Position
L
M
H
When the GAIN switch is switched, the newly set gain is
displayed for about 3 seconds on the Status (0, 1, 3) screen in
the viewfinder or LCD monitor.
Set it to L (0 dB) in normal use.
The gain set for each of the switch positions can be changed
with "GAIN" on the CAMERA OPERATION menu screen.
It is also possible to use the ALC function that varies the gain
automatically.
A setting at –3dB corresponds to a decreased sensitivity
equivalent to the brightness of a 1/2 filter.
See page 69 for details.
The gain transition can be made smoother by selecting
"SMOOTH TRANS" on the CAMERA OPERATION menu
screen.
See page 69.
However, note that the SMOOTH TRANS function is not
available if gain is set to ALC.
The LOLUX button is used when the illumination is still
insufficient after compensating with the GAIN switch.
Pressing the LOLUX button again will enter the LOLUX mode.
The gain up value during the LOLUX mode is set in LOLUX
GAIN of the CAMERA OPERATION menu.
"LOLUX ON" is displayed for about 3 seconds on the Status
(0, 1, 3) mode screen in the viewfinder or LCD monitor.
Pressing the button again cancels the LOLUX mode.
"LOLUX OFF" is displayed for about 3 seconds.
When the LOLUX function is in use, the image definition on
the screen will degrade to increase residual images, but this
is not a malfunction.
2000 Lx 4200 Lx
1/60
F11 F16
Factory-Set Gain
0dB
9dB
18dB
18000 Lx
1/240
EEI
83