72 Installation TB9100/P25 CG/P25 TAG Installation and Operation Manual© Tait Limited March 2014Connecting an Antenna RelayYou can connect a base station that will operate in Simplex mode to ancoaxial antenna relay. This makes it possible to receive and transmit using thesame antenna. A pin in the 9-way D-range needs to be configured as therelay driver.Notice The the isolation of this relay must be >40dB. The relay clos-ing time must be <20ms.Tait offers an Antenna Relay Kit which comes complete with installationinstructions (402-00041-01).Connecting the Ethernet LineThe RJ-45 socket labeled ETH provides the 10BASE-T or 100BASE-TEthernet connection to the other devices in the network. Use Cat-5 cableto connect the ETH RJ-45 socket to the Tait P25 Network via a hub,router, or switch.If necessary, refer to “Digital Interface Connection” on page 139 for a list ofEthernet connection pin allocations.Figure 3.14 Daisy-chaining a 1PPS inputThe longest length of cable must be between thesource and the first base stationuse short lengths of cablebetween each base stationmaximum of six base stationloads on one 1PPS output50 Ω termination
