Speco Technologies CVC-865DN/24 - Manual (Page 10)

Installation Guide
♦ Connections
1. Keep the cameras' power OFF during the installation.
2. Ensure that the input voltage is correct for the plug pack; both the camera and the plug pack may be
damaged if the voltage is incorrect.
3. Terminate the camera output to 75 ohms.
Use 75-ohm coaxial cable (RG-59/U, RG-6/U, RG-11/U).
Always set the last monitor termination switches to 75 ohms, and set the termination switches of
intermediate monitors to HIGH (HI-Z)
4. The table below shows the Maximum recommended cable length.
Type of Coaxial Cable
RG-59 / U
(3C-2V)
RG-6 / U
(5C-2V)
RG-11 / U
(7C-2V)
Recommended
Maximum Cable Length
30 ft.
100m
660 ft.
200m
825 ft.
250m
♦ Auto Iris Lens Adjustments
Once the lens is screwed in completely to its mechanical stop position, you will then be
able to rotate lens chassis back to suit the set-up position of the camera.
The back focus adjustment is accessible at the front end of the camera. It allows you to
adjust the back focal length or picture focus.
*Note: it does not apply to all types of lens, please contact with your dealer you
purchased your lens from.
♦ Troubleshooting
Problem What to Check
- No picture appears on the monitor
Is the system power on?
Is the cable connected properly?
Has the lens cap been removed?
Is the illumination proper?
Is the monitor properly adjusted?
- The picture is not clear
Is the lens mount ring proper?
Is the lens clear?
Is the lens properly focused?
Is the monitor terminated properly?
◎Note: If dust adheres to the lens, the picture quality will suffer.
To clean the lens, wipe lightly with a soft cloth or commercially available lens cleaning paper.
Speco Technologies CVC-614C : CVC-865DN/24
Instruction Manual 10