Table B. Video Coaxial Cable Requirements
Cable Type* | Maximum Distance |
RG59/U | 750 ft (229 m) |
| |
RG6/U | 1,000 ft (305 m) |
| |
RG11/U | 1,500 ft (457 m) |
| |
*Cable requirements:
75-ohm impedance
All-copper center conductor; steel-center conductor cable may result in poor performance
All-copper braided shield with 95% braid coverage
CONNECTING VIDEO INPUT
The NET5308T-EXP automatically detects the video standard (PAL or NTSC) when you connect a video input. It accepts both color and black-white analog video. Use the Endura workstation to enable or disable video termination for each video input. Video termination is enabled by default.
NOTES:
•Enabling line lock on cameras may cause video distortion. There may be noise in the camera’s power source. If video from one or more cameras is distorted, Pelco recommends disabling line lock on the camera as your first troubleshooting step.
•If a video distribution amplifier, such as a CM9760-MDA, is installed between the video source and the NET5308T-EXP, do not set the output video level above 1 Vp-p.
To connect each video input:
1.Connect a coaxial cable to the camera or other analog video source.
2.Connect the coaxial cable to the video in connector on the rear panel.
NOTE: You may have to use a BNC installation tool to connect coaxial cables to the rear panel.
After connecting the coaxial cables to the NET5308T-EXP, use the SEQ video output to verify each video source (refer to Connecting Sequence Monitor on page 24).
CAMERA CONTROL: COAXITRON
Coaxitron is Pelco’s up-the-coax technology. It requires only a coaxial cable and no other wiring or equipment. When the NET5308T-EXP receives a camera control command, it transmits that command up the coaxial cable to the PTZ device. Coaxitron is a single-direction protocol; the PTZ device cannot return any data to the unit.
To enable Coaxitron operation, connect the PTZ device to the video input on the NET5308T-EXP. Since Coaxitron is disabled by default for each camera, use the Endura workstation to enable it on the specific video inputs.
CAMERA CONTROL: PELCO D/PELCO P PROTOCOL
The NET5300B and NET5308T-EXP together support Pelco D (4-wire) and Pelco P (2-wire) protocols. These protocols use a serial interface to transmit commands to the PTZ device over separate control wires. Refer to Connecting Serial PTZ Devices in the Endura NET5300B Multichannel Video Encoder Base Module Installation manual (C2614M) for more information.
