Sony XCD-MV6 - Manual (Page 12)

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12
Broadcast Command
The normal 1394 communication method specifies the
node number at the host side so that only a specified
camera responds to the command.
If the node number is set to 63, all the cameras
connected to the same bus can receive the command
simultaneously, i.e., only one command issued from the
host can control multiple cameras at the same time.
Example: To broadcast a software trigger
1. Connect multiple cameras to the same bus.
2. Set the video mode and frame rate appropriately on
each camera and prepare the cameras for sending
images at the same time.
3. Set each camera to the software trigger mode.
4. Issue a software command for node number 63.
Now all the cameras start exposure and output images
simultaneously.
All the commands including the video mode setting and
the feature control are capable of broadcasting except
the block writing command.
When setting different types of cameras using a
broadcast command, be careful not to issue a command
that the cameras do not support.
1394 Bus Synchronization
This camera is equipped with a function that
synchronizes with the cycle time resistor of the 1394 bus
to define exposure timing. This synchronization occurs
at the start of exposure.
When the bus synchronization function is enabled,
multiple cameras connected to the same bus will
automatically synchronize with the 1394 bus and
operate. As band restrictions will be applied depending
on the transmission rate configured, you must configure
a video mode that will allow simultaneous video
transmission.
When long exposure mode (i.e., when the exposure time
configured is longer than the image transmission
frequency), pseudo-binning mode, or partial scan mode
is configured, the synchronization function will be
disabled.
The 1394 bus synchronization function includes jitter
between the bus clock and camera clock. To obtain more
accurate synchronization, perform external
synchronization via hardware triggering.
Gain
This camera allows manual gain settings of up to 1 to 8
times in 0.125 increments. The analog gain is 1 to 4
times, while the digital gain is 4.125 to 8 times.
Note
The timing reflected by the gain is from the 2nd frame.
Be sure to take note of this before use.
Brightness
This feature controls the black level of a video image.
Gamma
This feature sets the gamma coefficient. Gamma
coefficient values can be set at the following settings
between a variable range of 0 to 15.
0: Linear
1 to 15: 0.1 to 1.5 curve coefficient (increments of 0.1)
Gamma offset allows you to set the black standard value
at a variable range between 0 to 255 (1/4 the low-level
side of the 0 to 1023 output range during 10-bit output).
Levels equal to or below the black standard value set
with gamma offset can prevent too much white in the
black level because the gamma level is fixed at 1.
Output
1023
γ = 0.1 to 1.5
0 1023 Input Offset
0 to 255
Output = Input