Ikegami OCP-300, Operation Manual

Page: 93 / 274

5. Operation of the Control Knob 5-1
5. Operation of the Control Knob
5.1 Camera Data Adjustment
There are generally two types of data control of the camera, which are the absolute
control and the relative control.
(There are data control of the camera head and BS/CCU; however, we will use the term
"camera" for both data controls in this manual for convenience.)
1) Absolute Control
Conventionally, this control is applied to the OCP/RCP. When the control knob is
operated, the variation of the potentiometer is converted from analog to digital, and the
data is transferred to the camera. The camera volume file is rewritten according to the
transferred data (absolute data).
The value of the sending data is determined according to the turned angle of the control
knob. Therefore, the knob operation and the movement match to each other, and it
provides the good operation feeling.
Several control panels for the absolute control cannot be connected at the same time.
2) Relative Control
Conventionally, this control is applied to the MCP. When the rotary encoder knob is
operated, the pulse is output in proportion to the turning angle. The CPU counts the
number of pulses within the specified time and sends the counted number as the data.
Control knob
Absolute
c
ontrol
Volume file