Ericsson MOBITEX BRU3, Manual

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Contents
1 General ........................................................................................................ 3
2 Hardware Units............................................................................................ 4
3 Hardware Modules ...................................................................................... 6
3.1 Logic and Modem Equipment.......................................................... 6
3.2 Radio Unit Modules ......................................................................... 7
3.3 Power Supply Equipment................................................................. 7
4 Modem Equipment ...................................................................................... 8
4.1 Telephone Modem Boards ............................................................. 10
4.1.1 V.11 and V.28 Serial Interfaces.......................................... 10
4.1.2 Interface signals .................................................................. 11
4.1.3 Connector............................................................................ 12
5 Logic Equipment ....................................................................................... 13
5.1 Synchronous Serial Circuit ............................................................ 14
5.2 Main CPU including Memory........................................................ 14
5.3 Dual Port Memory.......................................................................... 14
5.4 Signal Processor Unit with Memory .............................................. 15
5.5 Console Ports ................................................................................. 15
5.6 LEDs .............................................................................................. 15
5.7 Reset Button ................................................................................... 16
6 Radio System............................................................................................. 17
6.1 Radio Parameters ........................................................................... 18
6.1.1 Frequency Band 400 MHz (HRB 104 43/xx) ..................... 18
6.1.2 Frequency Band 800 MHz (HRB 104 43/C20) .................. 19
6.1.3 Frequency Band 900 MHz (HRB 104 43/C2, C4, C5, C6) 19
6.1.4 Frequency Band 900 MHz (HRB 104 43/C7, C8).............. 20
6.2 Radio Units..................................................................................... 21
6.2.1 Transmitter.......................................................................... 21
6.2.2 Modulation Synthesizer ...................................................... 22
6.2.3 Receiver .............................................................................. 22
6.2.4 Reference Oscillator ........................................................... 22
BRU3 Logic and Radio
System
BRU3 MANUAL, Doc.no: 155 16-ANNA 805 08 Uen, Rev H, 2003-02-07