Specifications

7
Matrix Installation and Operation
Sensornet Dome Connections
Video inputs that use UTC (AD Up-the-Cable) communication protocol communicate with
the MegaPower LT through the video BNC connection. However, video inputs using
Sensornet telemetry control (i.e., typically Sensornet dome cameras) require a second
connection. For this reason, a telemetry connection is provided for Sensornet dome
cameras (two on MegaPower LT 32x8).
Connect Sensornet dome cameras to the MegaPower LT as shown in the figure below.
Up to 32 data connections can be looped from this connection.
NOTES
• The distance from the MegaPower LT to the last dome must not exceed 3300 feet/
1000 meters. If star wiring is used, this distance will be greatly reduced.
• It may be necessary to terminate the dome control connection using a dip switch on
the MegaPower LT. See page 8 for more details.
• Sensornet dome cameras must be addressed in the menu system. See page 16 for
more details.
Sensornet Termination and Wiring
The following rules must be observed when working with a SensorNet network:
1. Each Sensornet link has a maximum length of 3300 feet/1000 meters (using AWG 22
unshielded twisted-pair cable).
2. There can be a maximum of 32 devices in each Sensornet link.
3. There can be a maximum of 4 repeaters in the path of any 2 devices in a network.
4. In a backbone network configuration, there must always be 2 terminations, one at
each end of the network.
5. In a star network configuration, there must be no more than 4 terminations.
6. Receivers on SensorNet devices will operate satisfactorily at signal levels between
5V and 0.3V (differential peak-to-peak).