Tait TB8100 Installation Manual

Also see for TB8100: Installation and operation manual Operation manual User manual Installation guide User manual

Contents

Tait TB8100 Installation Manual Manual pdf 26 page image

26 Connection TB8100 Installation Guide© Tait Electronics Limited June 20052.5 RF ConnectionsImportant The PA may be damaged if the load is removed or switchedwhile the PA is transmitting.To protect the PA output stage from load transients (i.e. switching orremoving the load), we recommend that you fit an isolator between the PAand the load. Fit the isolator as close as possible to the RF output connectoron the PA. Do not connect any switching or combining equipmentbetween the isolator and the PA.We recommend that you use dual-screened coaxial cable such as RG223 forthe BNC/TNC connections, and RG214 for the N-type connections.When the base station is used in simplex mode using a single antenna witha coaxial changeover relay, the isolation of this relay must be ≥40dB.2.6 System Control BusImportant In base station systems which use a PMU, the PMU mustbe connected to the system control bus at all times. TheI2 C current source is located in the PMU, and if the PMUis disconnected, the state of much of the bus will be unde-fined. This may cause corrupted data to be present on thebus when the reciter reads the states of the switches on thecontrol panel. This in turn may result in random actuationsof microphone PTT, carrier, or speaker key, causing theBSS to transmit or the speaker to be actuated incorrectly.

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