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Assigning camera address and "Device ID".
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A camera address must already be assigned to a Cohu PTZ device before using it with this driver (the Cohu PTZ device have no DIP-switches for assigning camera addresses).
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"Joystick" navigation and "continuouspantiltmove".
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NOTE! The continuouspantilt movements (e.g joystick control) may stall or block the tilt moter when tilting down. This may damage the unit! Check that a continuous tilt down movement do not block or stall the tilt moter (tilt down and check that the tilt movement stops by itself before blocking). If the tilt movement will block, try to contact Cohu support and ask if it is possible to upgrade the firmware in the Cohu unit to avoid the stall/block of the tilt down movement. If it is not possible to upgrade the firmware and avoid the stall/block of the tilt down movement, then it is probably not possible to use the continuous pantilt movement command without problems!
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Movement limits and continuous tilt
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The movement limits for tilt are not 100% realiable when set close to the mechanical limits.
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Manual focus and zoom move.
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A zoom move will set autofocus=on. After a zoom move, a short delay is required before a manual focus move is possible.
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Presets saved in the Cohu PTZ unit and digital zoom.
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When saving a preset in the Cohu PTZ unit (device presets), the digital zoom position is not saved (e.g. device presets are only saved in optical zoom area).
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Preset positions.
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When saving a preset position, only pan, tilt and zoom positions are saved in the preset.
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Video Source Configuration |
| Parameter |
Description |
Range |
| Device ID |
This is the address of the connected device. This value should correspond to a previously assigned address in the Cohu PTZ device(see above). |
1-223 |
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Driver Specific Settings
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There are no driver specific settings for this driver.
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Mechanical limits
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| Movement Limits |
Minimal value |
Maximal value |
Comment |
| Left |
-180 |
180 |
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| Right |
-180 |
180 |
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| Up |
-79 |
38 |
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| Down |
-79 |
38 |
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| Zoom Limits |
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| Zoom wide |
1 |
19999 |
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| Zoom tele |
1 |
19999 |
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| Optical Data |
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| Min field angle |
1 |
999 |
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| Max field angle |
1 |
999 |
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The optical data limits are used to tune image centering:
- Zoom out completely and adjust Max Field Angle until the spot you click becomes centered accurately.
- Zoom in completely and repeat for Min Field Angle.
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Light Control
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| Parameter |
Description |
Range |
| IR cut filter |
Set to on to enable the infrared cut filter. |
on, off, auto |
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Extended Driver Specific Settings
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| Parameter |
Description |
Range |
| Focus time |
The calibration constant for focus (time in ms for maximum focus change). Higher values give greater focus changes. Calibrate by confirming that a maximum focus request (i.e. "rfocus=9999") at one extreme (e.g. focus near) takes you to the other. |
1-65535 |
| Iris time |
Calibration constant for iris (time in ms for maximum iris change). Higher values give greater iris changes. Calibrate by confirming that a maximum iris request (e.g. "riris=9999") at one extreme (e.g. full iris close) takes you to the other. |
1-65535 |
| Goto preset delay |
Time (in seconds) it takes for the image to stabilize it self, after the camera has performed the longest "goto device preset action". Used for disabling/enabling image analysis (e.g. motion detection). Note that this does not apply for server presets. |
0-100 |
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