TETRA in Tunnels - Anthony Sutton

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How to serve Tunnels - Antennas‣ Efficient for covering wideopen spaces‣ Poor in Tunnels at LowFrequency‣ Can Suffer from Near / Fareffect‣ Tuned to frequency bandSlide 6
How to serve Tunnels - Radiating Cable‣ Imperfectly screen co-axialcable with slots or holeswhich radiate‣ Controlled radiation, majorityof power transmitted alongthe cable‣ Avoids Near / Far Effect‣ Broadband or TunedSlide 7
Page 1 and 2: TETRA in Tunnels1
Page 3: Tunnel Environments‣ Road Tunnels
Page 8: Coverage in Tunnel - Link Budget Ca
Page 13 and 14: Coverage Options - Large Tunnels &
Page 15 and 16: Coverage Options - Large Tunnels &
Page 17: Coverage Options - Large Tunnels &
Page 20 and 21: What are Equi-signal overlaps‣Are
Page 22 and 23: Alarm Monitoring‣ Local Alarms fo
Page 24 and 25: Sample of existing Tetra Tunnel Cov

TETRA in Tunnels - Anthony Sutton

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