953.2(c) 953.2( e)
• Output Circuits . Ground true
• Time Switch . For functions
• Manual Pushbutton. For sync function with master removed.
controller unit and as follows:
1.a Cycle.
• Length. As indicated, in 1- second increments.
• Force -Off. Ensure the force- off command is directed to correct phase.
• Cycle and Split Transfer . At 0% point in local cycle.
• Offset Transfer . With pedestrian control, transfer in “green/walk” interval. With non-pedestrian control, transfer in “green.” Transfer to occur in a maximum of three cycles with no more than 17% change in any one cycle.
1.b Interface. NEMA TS 1, Section 13. 1.c Environment. NEMA TS 1, Section 2.
radio unit, coaxial cable, coaxial cable surge protection, antennas, mounting hardware, and antenna grounding kit. Use unlicensed frequency bands for radio units unless a licensed band has been preapproved by the Representative. Provide all necessary antennas, cables, jumpers and lightning protection, but not be limited to the following requirements:
• Provide omni antennas having a minimum gain of 8dbi and directional antennas 12dbi unless stated higher in the approved drawings. Provide antennas having 50 ohms impedance and voltage standing wave ratio (VSWR) less than 1.5:1.
• Provide coaxial cable having 50 ohms impedance. Provide a minimum 1/2- inch coaxial cable with N - 953.2(e) 953.2( h) antenna connectors that are weatherproofed with an approved rubber mastic tape.
• Provide a minimum data throughput of 115 kilobits per second ( kbps) for serial radio units and 1 megabit per second ( Mbps ) for Ethernet radio units . Use radio units having built -in setup and diagnostic capabilities. Have a minimum receiver sensitivity -106 decibels per milliwatt ( dDm) for serial radio units and -92dB m for Ethernet. Output impedance of 50 ohms on all radio units. Provide radio units meeting the following approval agen