increase or decrease as long as the control is maintained in that position or until the
LLA reaches its minimum or maximum setting.
NOTE:
The percentage of the maximum LLA value displayed on the video is just an
indication to help the user in setting the amplification. Long Line Amplification is
performed by some complex electronics with some non-linear components. As a
result, the long line amplification feedback will not be a linear function of the cable
compensation. In other words, if the correct long line amplification setting for a cable
of 2000 ft is 25% (25:100), it is very unlikely that the corresponding long line
amplification for a 4000 ft cable will be 50% (50:100).
Step 3
: Exit the LLA adjust mode.
This is performed by simultaneously actuating
Zoom Tele
and
Focus Near
.
Note that entering and exiting the LLA adjust mode is performed with the same
control combination.
Exiting the LLA adjust mode, will display on the screen the action just performed in
the following format:
LLA EXIT
This message disappears shortly after it appears.
When the LLA adjust mode is exited, the video the new setting is saved in the flash
memory of the microcontroller interface and the value is retained through power
cycles.
NOTE
: The LLA setting is saved only if the LLA adjust mode is exited as described above.
If the user changes the LLA setting, then decides to turn off the camera before
exiting the LLA adjust mode, the current LLA setting is not saved and the old LLA
setting will be implemented on next power up.
3.9.2 Adjust LLA in RS-232 mode.
As described in the Computer Control section, the camera can be configured to be
controlled via RS-232 commands. When the camera is operated in this
configuration, some RS-232 commands can be sent in order to query and adjust the
LLA setting. Please Contact ROS for more details.
3.10 OVERLAY CONTROL
The camera overlay can be turned off or displayed at different positions on the screen. This
is performed by simultaneously actuating Zoom Tele and Focus Far. When the combination
of switches is actuated, the overlay position changes to one of the four possibilities in the
following sequence: UPPER LEFT, UPPER RIGHT, LOWER RIGHT, LOWER LEFT.
Actuating the combination of switches one more time when in lower left position, will turn
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