FAQ

What is the power consumption of the radar?

What is the network bandwidth usage?

Up to 25 megabytes per sensor. Please contact Navtech for exact figures for your chosen radar.

What connectivity does the radar support?

Connection to the radar is via ethernet. Each radar has an RJ45 socket. We recommend cat5 cable to the radar, not to exceed 70m in length. Longer lengths should make use of switches or fibre converters.

What is the ideal mounting height?

The ideal mounting height can vary depending on the specific site, the type of radar and if the beam is angled. The X units have been designed to be mounted at about 4m, this will give a minimum detection range of about 10m and for a man walking upright, with the maximum according to the sensor data sheet.

What is the beam width?

The beam width varies per radar sensor. The azimuth beam width is either 1 or 2 degrees with the main elevation beam width of the radars ranging from 3 to 4 degrees. The X radar in addition has a close range infill beam of approximately 25 degrees. Please see the data sheets for clarification.

At what ambient temperatures can the radar operate?

Please refer to the data sheet for the exact model, but most sensors will operate over -20 to +60 degrees C.

Can the radar be used on the move?

Not as an intruder detection device, as the radar has to be static in order to be able to detect movement. It can, however, be used as an obstacle detection device to prevent large plant equipment from having collisions.

What is the operating frequency/band width of the radar?

All radars operate between 76-77GHz. Out of band performance is as per ETSI standard EN 301 091-1 V1.2.1

Does the radar interfere with aviation systems?

The radar conforms to ETSI standard EN 301 091-1 V1.2.1. Confirmation of compliance with aviation systems is the responsibility of the systems integrator/end user.

Is the radar affected by adverse weather conditions?

Does Witness provide other interfaces?

Witness can interface to multiple ethernet relay units, providing multiples of 6 digital inputs and 6 relay outputs. These I/O lines can be linked to various actions/events within Witness.

What cameras does Witness support?

Witness currently supports a selection of cameras, as detailed in the applicable sales literature. Additional cameras can be added (at cost) if they support absolute positioning.

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