Tait TB9100 Installation And Operation Manual

Also see for P25 CG: Installation and operation manual User manual

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Tait TB9100 Installation And Operation Manual Manual pdf 58 page image

58 Installation TB9100/P25 CG Installation and Operation Manual© Tait Electronics Limited January 2007Connecting an External Frequency ReferenceFor K4 Band, the internal frequency reference accuracy is inadequate, andan external reference (for example, the Tait T801-02) must be used. Theexternal reference frequency can be 10MHz or 12.8MHz, with an inputlevel of 300mV pp to 5V pp. The stability of this reference should be betterthan 50 parts per billion.If an external reference is required, use the CSS to program the base stationfor 10MHz or 12.8MHz (“Configure > Network Element >Miscellaneous”), and to enable the external reference “Enable” and“Invalid” alarms (“Configure > Alarms > Control”).Connecting 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.Important The the isolation of this relay must be > 40dB. The relayclosing 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 Ethernetconnection to the other devices in the network. Use Cat-5 cable to connectthe ETH RJ-45 socket to the TaitNet network via a hub, router, or switch.If necessary, refer to “Digital Interface Connection” on page 121 for a list ofEthernet connection pin allocations.Connecting the Analog LineThe RJ-45 socket labeled AUD can provide a direct audio connection to alocal or remote dispatcher. It also provides a basic E&M signaling interface.Refer to “Analog Interface Connection” on page 121 for a list of the analogconnection pin allocations.Important The analog RJ-45 socket is keyed to ensure that the correctcable (one with a keyed plug) is connected. If the analogcable were to be connected to the digital RJ-45 socket, thepotentially high voltages on the E&M lines would damagethe Ethernet interface.