Ikegami OCP-300, Operation Manual

Page: 97 / 274

5. Operation of the Control Knob 5-5
5.2 Control Method with OCP-300
The OCP-300 is the control panel that has the both advantages of the absolute control
operation by the conventional OCP potentiometer and the relative control operation by
the MCP rotary encoder. It can have the both good operation feeling by the
potentiometer and the function that can prevent jumping of the camera data at the
control panel switching by the rotary encoder.
While operating the control knob, the potentiometer value is converted from analog to
digital at a certain interval. At this time, OCP-300 does not transfer the data as an
absolute value. Rather, it compares the A/D conversion value with the former A/D
conversion value and transfers the difference of the values as an relative data. The
camera conducts processing by the same manner as the control by the rotary encoder.
In addition, the rotary encoder knob operation using the LCD screen is the relative data
control as the MCP.
The panel configuration can switch the iris control between the conventional method,
"
absolute value iris control," and this new control method, "relative value iris control."
Reference
: Refer to "6. Absolute value Iris Control" and "7. Relative Value Iris
Control" for details of the operation. Refer to "21.1.3 Setting Item" for
details of the setting change.
Relative C ontrol
Manual file
Control
knob