7.3.1 MTS 4 Filter Tray. .................................................................................................. 272
7.3.2 MTS 4 Preselector. ................................................................................................ 275
7.3.2.1 Replacing the MTS 4 Preselector. ........................................................... 276
7.3.3 MTS 4 Duplexer ..................................................................................................... 277
7.3.3.1 Replacing the MTS 4 Duplexer ................................................................ 278
7.3.4 Hybrid Combiner in MTS 4 .................................................................................... 280
7.3.5 Post Filter. .............................................................................................................. 280
7.3.5.1 Replacing the Post Filter .......................................................................... 281
7.3.6 Cavity Combiner .................................................................................................... 283
7.3.6.1 Cavity Combiner - Theory of Operation ................................................... 284
7.3.6.2 Replacing the Cavity Combiner ............................................................... 285
7.3.6.3 Tuning the MTCC in a BTS in Tetra Application Mode ............................ 287
7.4 Expansion Cabinet RFDS .................................................................................................... 288
7.4.1 RX Splitter. ............................................................................................................. 291
7.4.1.1 Replacing the Expansion Cabinet RX Splitter ......................................... 292
7.4.2 Cavity Combiner .................................................................................................... 293
Chapter 8: Site Controller ..................................................................................... 294
8.1 Site Controller – Theory of Operation .................................................................................. 295
8.2 Site Controller – Indicators, Switches, and Connectors ...................................................... 296
8.2.1 Site Controller – Front Panel ................................................................................. 297
8.2.1.1 Site Controller – Front Panel Indicators (LED) ........................................ 298
8.2.1.2 Site Controller – Front Panel Switches .................................................... 301
8.2.1.3 Site Controller – Front Panel Connectors ................................................ 301
8.2.2 Site Controller Rear Panel ..................................................................................... 303
8.2.2.1 Site Controller – Rear Panel Connectors ................................................. 303
8.3 Site Controller CAN Bus ...................................................................................................... 303
8.3.1 Updating CAN Bus TrackID Mapping List ............................................................. 307
8.4 Site Controller – GPS Module ............................................................................................. 308
8.5 Site Controller – Lithium Battery .......................................................................................... 308
8.5.1 Resetting the RTC Battery Status. ......................................................................... 308
8.5.2 Checking if the Site Controller Lithium Battery Needs Changing .......................... 308
8.5.3 Replacing the Site Controller Lithium Battery ........................................................ 309
Chapter 9: XHUB Controller. ................................................................................. 311
9.1 XHUB Controller – Theory of Operation .............................................................................. 312
9.2 XHUB Controller – Indicators, Switches, and Connectors .................................................. 313
9.2.1 XHUB Controller – Front Panel .............................................................................. 314
9.2.1.1 XHUB Controller – Front Panel Indicators (LED)..................................... 315
9.2.1.2 XHUB Controller – Front Panel Switches ................................................ 316
9.2.1.3 XHUB Controller – Front Panel Connectors ............................................ 316
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