Gain (Sensitivity) Adjustment; Gain Switching; Gain Boost Under Lolux Condition; Switch Setup According To Illumination And Subject - JVC GY-DV700W Instructions Manual

13. FEATURES OF THE CAMERA SECTION

13-4 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 LOLUX
BACK L STRETCH
NORMAL NORMAL
SPOT L COMPRESS
POWER
NG
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 LOLUX
BACK L STRETCH
NORMAL NORMAL
SPOT L COMPRESS
POWER
NG
ON OFF
[Relationship between gain, iris and shutter]
0.7 Ix 8 Ix 32 Ix
FULL AUTO SHOOTING
33 dB 12dB 0 dB
LOLUX ALC AUTOMATIC IRIS
F1.4
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This switch allows the gain to be boosted when the illumination
of the subject is insufficient.
Switch Position Factory-Set Gain
L 0dB
M 9dB
H 18dB
When the GAIN switch is switched, the newly set gain is
displayed for about 2 seconds on the Status 0 or Status 1 screen
in the viewfinder.
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 OPERATION MENU screen.
It is also possible to use the ALC function that varies the gain
automatically.
See page 73 for details.
To make the gain transition smoother, set "SMOOTH TRANS"
on the OPERATION MENU to "ON".
See page 73.
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.
Press the button to enter the LOLUX mode in which the gain is
boosted by about 33 dB.
"LOLUX ON" is displayed for about 2 seconds on the Status 0
or Status 1 mode screen in the viewfinder.
Pressing the button again cancels the LOLUX mode.
"LOLUX OFF" is displayed for a few 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 Ix 4200 Ix 18000 Ix
1/50 1/200
EEI
F11 F16
13. FEATURES OF THE CAMERA SECTION

13-5 Switch Setup According to Illumination and Subject

Various switch settings are performed to accommodate the conditions of the illumination and the subject when shooting.

SWITCH FUNCTIONS

AUTO IRIS LEVEL BLACK stretch/black
switch compress setting switch
AUTO IRIS FULL AUTO BLACK LOLUX
BACK L STRETCH
NORMAL NORMAL
SPOT L COMPRESS
POWER
NG
ON OFF

FULL AUTO SHOOTING (FAS) FUNCTION

FULL AUTO FULL AUTO\
indicator shooting button
AUTO IRIS FULL AUTO BLACK LOLUX
BACK L STRETCH
NORMAL NORMAL
SPOT L COMPRESS
POWER
NG
ON OFF
CAUTION:
• When the power is turned on while the camera is in the
FAS mode, it takes about 10 seconds before the
automatic adjustment of FAS is completed.
• In the FAS mode, the audio recording level is not set
automatically to the AUTO mode.
To select the AUTO mode, set the AUTO/MANUAL switch
of the VCR section to AUTO.
1AUTO IRIS LEVEL switch
This switch allows the reference value for the auto iris
adjustment to be changed according to the lighting condition.
BACK. L : When the subject is in backlit conditions.
Sets the Auto Iris reference value to a value that
is about 1 step wider than the standard setting.
NORMAL: Normal lighting condition.
SPOT. L : When the subject is under a spotlight.
Sets the Auto Iris reference value to a value that
is about 1 step narrower than the standard setting.
2BLACK stretch/black compress switch
This switch makes the image easier to see by varying the
black gain.
BLACK STRETCH : Boosts the gain of black areas to
improve the reproducibility of black.
NORMAL : Normal black gain.
BLACK COMPRESS : Attenuates the gain of black areas to
make the image sharper.
The FAS function provides a wide range of compatibility with
shooting conditions that varies as you move between indoors
and outdoors or between bright and dark locations. It eliminates
the need to change the switch and filter positions every time
you move.
The FAS function provides an integrated control of the ALC
(Automatic Level Control), Auto iris and FAW (Full-time Auto
White balance) functions.
Operation
1.
Simply press the FULL AUTO button to enter the FAS mode,
in which the FULL AUTO indicator lights and "FAS" is
displayed to the right in the viewfinder.
2.
Pressing the FULL AUTO button again cancels the FAS
mode and turns the FULL AUTO indicator off.
Automatic Setting Contents
• If you have been displaying the colour bars, the screen is
switched automatically to the camera image.
• The auto iris adjustment mode is entered even if the iris mode
switch of the lens is set to manual.
• The GAIN switch and WHT.BAL switch settings are defeated
in the FAS mode.
• The LOLUX button setting is active even in the FAS mode.
However, the ALC and EEI are defeated in the LOLUX mode,
in which only the auto iris adjustment and FAW are used.
• All of the previous setting contents are recalled when the
FAS mode is cancelled.
• The SMOOTH TRANS function is defeated during switch to
the FAS function.
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