Motorola XTS 2500 Service Manual page 6

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2.4.2 Analog Mode of Operation-Receiving........................................................................................ 2.4-1
2.4.3 Analog Mode of Operation-Transmitting.................................................................................... 2.4-2
2.4.4 ASTRO Mode (Digital Mode) of Operation ................................................................................ 2.4-2
2.4.5 Main Board Overview ................................................................................................................ 2.4-2
2.4.6 Vocoder Circuitry Overview ....................................................................................................... 2.4-3
Chapter 2.5 900MHz Overall Characteristics...................................... 2.5-1
2.5.1 Introduction................................................................................................................................ 2.5-1
2.5.2 Analog Mode of Operation-Receiving........................................................................................ 2.5-1
2.5.3 Analog Mode of Operation-Transmitting.................................................................................... 2.5-2
2.5.4 ASTRO Mode (Digital Mode) of Operation ................................................................................ 2.5-2
2.5.5 Main Board Overview ................................................................................................................ 2.5-2
2.5.6 Vocoder Circuitry Overview ....................................................................................................... 2.5-3
Chapter 3.1 VHF Radio Power ............................................................. 3.1-1
3.1.1 Introduction................................................................................................................................ 3.1-1
3.1.2 Radio Power Up or Down .......................................................................................................... 3.1-1
3.1.3 General...................................................................................................................................... 3.1-1
3.1.4 B+ Routing for VHF Band Main Board ...................................................................................... 3.1-2
3.1.5 B+ and +5V Routing for VOCON............................................................................................... 3.1-3
Chapter 3.2 UHF1 Radio Power ........................................................... 3.2-1
3.2.1 Introduction................................................................................................................................ 3.2-1
3.2.2 Radio Power Up or Down .......................................................................................................... 3.2-1
3.2.3 General...................................................................................................................................... 3.2-1
3.2.4 B+ Main Board Routing ............................................................................................................. 3.2-2
3.2.5 B+ and +5V Routing for VOCON............................................................................................... 3.2-3
Chapter 3.3 UHF2 Radio Power ........................................................... 3.3-1
3.3.1 Introduction................................................................................................................................ 3.3-1
3.3.2 Radio Power Up or Down .......................................................................................................... 3.3-1
3.3.3 General...................................................................................................................................... 3.3-1
3.3.4 B+ Routing for UHF2 Band Main Board .................................................................................... 3.3-2
3.3.5 B+ and +5V Routing for VOCON............................................................................................... 3.3-3
Chapter 3.4 700/800 MHz Radio Power ............................................... 3.4-1
3.4.1 Introduction................................................................................................................................ 3.4-1
3.4.2 Radio Power Up or Down .......................................................................................................... 3.4-1
3.4.3 General...................................................................................................................................... 3.4-1
3.4.4 B+ Routing for 700/800 MHz Band Main Board ........................................................................ 3.4-2
3.4.5 B+ and +5V Routing for VOCON............................................................................................... 3.4-3
Chapter 3.5 900 MHz Radio Power ...................................................... 3.5-1
February 14, 2012
Table of Contents
6816985H01-F