Tait TB9400 Installation And Operation Manual

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Tait TB9400 Installation And Operation Manual Manual pdf 19 page image

TB9400 Installation and Operation Manual Description 19© Tait Limited March 20171.5 ApplicationsThe TB9400 operates in P25 trunked networks (Phase 1 or Phase 2), P25conventional networks and analog conventional networks. It operates as astand-alone repeater/base station, or as part of a channel group, providingreceiver voting and simulcast transmission. All air interfaces and systemtypes support simulcast operation.In P25 Phase 2 operation, a single TB9400 base station can provide twotraffic channels, since each radio frequency (physical channel) providestwo logical channels (timeslots). However, it can provide only one controlchannel, since control channels are still P25 Phase 1.In a trunked simulcast network, the transmitters in the channel group aresynchronized and transmit simultaneously on the same frequency. Eachtransmitter needs a highly accurate 1PPS pulse and an external frequencyreference, so that it can time transmissions with the required accuracy. Alsorequired is an NTP source that is derived from the same source as the 1PPSsignal. This will ensure a common timestamp in logs across all units in thesystem. An external frequency reference, along with an NTP source and1PPS signal derived from the same GPS source, are also essential for allreciters for P25 Phase 2 operation.In a P25 conventional network, the TB9400 operates as a single or widearea conventional repeater, with receiver voting and optional simulcast.Dispatch connection is via the Tait P25 Console Gateway, supportingconversion between P25 and analog consoles with MDC1200 signalling.In an analog conventional network it can operate as a repeater withCTCSS 1 or DCS subaudible signaling.The base station can also operate as part of an analog conventionalsimulcast network and is fully IP-connected. It also features an integralvoter (thus requiring no external voter).The base station can be provided as a receive-only variant in systems thatneed sites to enhance the receive coverage. The receiver module in areceive-only base station is physically unable to transmit.The base station can be configured for Shared Channel operation, to detectinterference on the uplink, as long as the site controller is compatible.For more information on these applications, refer to the Help andappropriate Tait System Manual.1. Private Line (PL).