The operational controls of NVEE should be clearly identifiable in the dark and their brightness should be adjustable. The operational controls should meet the requirements of resolution A.694(17) as well as applicable requirements of the IEC*
6.2 Presentation of information
The monitor display should be non-dazzling and non-flickering. The display should be at least 200 mm diameter.
7 DESIGN AND INSTALLATION
7.1 General
7.1.1 Durability and resistance to environmental conditions
NVEE should withstand the environmental conditions specified in resolution A.694(17) and in the applicable IEC requirements*.
7.1.2 Interference
With respect to electrical and electromagnetic interference, NVEE should meet the requirements of resolutions A.694(17) and A.813(19) and the applicable IEC requirements*.
7.1.3 Power Supply
The power supply of NVEE should meet the requirements of resolution A.694(17) and the applicable IEC requirements*.
7.2 Specific requirements
7.2.1 Maintenance
With respect to maintenance, NVEE should meet the requirements of resolution A.694(17) and the applicable IEC requirements*.
8 INTERFACING
Interfaces should meet applicable international standards**.An interface for image recording should be provided.
9 BACK-UP AND FALL-BACK ARRANGEMENTS
In the event of failure of the motor-driven pan-tilt device, the sensor should be capable of being fixed in the zero position.
*IEC 945.
**IEC 1162.
