Motorola ASTRO XTS 2500 Service Manual page 13

Table of Contents
7.1.10 TP6 PCIC Control Voltage ...................................................................................................... 7.1-11
7.1.11 PP7 TX LO .............................................................................................................................. 7.1-12
7.1.12 PP8 Higher Level Voltage Multiplier........................................................................................ 7.1-13
7.1.13 PP9 Superfilter Output ............................................................................................................ 7.1-14
7.1.14 PP11 Prescalar Input to FracN Synthesizer............................................................................ 7.1-15
7.1.15 PP12 Reference Crystal Output .............................................................................................. 7.1-16
7.1.16 TP13 Mod In............................................................................................................................ 7.1-17
7.1.17 TP14 1st LO Control Voltage .................................................................................................. 7.1-18
7.1.18 PP15 VCO Output ................................................................................................................... 7.1-19
7.1.19 PP17 Frequency Out (16.8 MHz) ............................................................................................ 7.1-20
7.1.20 PP18 RX RF Input at Antenna Switch..................................................................................... 7.1-21
7.1.21 PP19 Antenna Switch Bias...................................................................................................... 7.1-22
7.1.22 PP20 Preselector Tuning Voltage ........................................................................................... 7.1-23
7.1.23 PP22 Analog 5V ...................................................................................................................... 7.1-24
7.1.24 PP23 Preselector 1 Output...................................................................................................... 7.1-25
7.1.25 PP24 Low-Noise Amplifier Output........................................................................................... 7.1-26
7.1.26 PP25 Preselector 2 Output...................................................................................................... 7.1-27
7.1.27 PP26 Mixer Out (IF) ................................................................................................................ 7.1-28
7.1.28 PP27 Crystal Filter Out............................................................................................................ 7.1-29
7.1.29 PP28 Abacus Analog 3V ......................................................................................................... 7.1-30
7.1.30 PP29 2nd LO Control Voltage ................................................................................................. 7.1-31
7.1.31 PP30 2nd LO VCO Buffer Output............................................................................................ 7.1-32
7.1.32 PP31 Analog 5V DC................................................................................................................ 7.1-33
7.1.33 PP32 Abacus Digital 3V .......................................................................................................... 7.1-34
7.1.34 TX Audio 1 kHz Tone .............................................................................................................. 7.1-35
7.1.35 16.8 MHz Buffer Input and Output........................................................................................... 7.1-36
7.1.36 32.768 kHz Clock Outputs....................................................................................................... 7.1-37
7.1.37 SPI B Data............................................................................................................................... 7.1-38
7.1.38 RX Serial Audio Port (SAP)..................................................................................................... 7.1-39
7.1.39 PP33 SPI Data ........................................................................................................................ 7.1-40
7.1.40 PP34 SPI CLK......................................................................................................................... 7.1-41
7.1.41 PP35 Universal Chip Select .................................................................................................... 7.1-42
7.1.42 PP36 Abacus Chip Select ....................................................................................................... 7.1-43
7.1.43 TP37 RX SSI Data .................................................................................................................. 7.1-44
7.1.44 TP38 RX SSI Clock ................................................................................................................. 7.1-45
7.1.45 TP39 RX SSI Frame Sync....................................................................................................... 7.1-46
Chapter 7.2 UHF1 Troubleshooting Waveforms ................................ 7.2-1
7.2.1 Introduction................................................................................................................................ 7.2-1
7.2.2 List of Waveforms...................................................................................................................... 7.2-1
7.2.3 RF Test Points........................................................................................................................... 7.2-2
7.2.4 Main Circuit Board RF Shield Locations.................................................................................... 7.2-4
7.2.5 PP1 Antenna Input .................................................................................................................... 7.2-6
7.2.6 PP2 TX Signal at Harmonic Filter Input..................................................................................... 7.2-7
7.2.7 PP3 Coupler RF Out ................................................................................................................. 7.2-8
7.2.8 PP4 TX Signal at PA ................................................................................................................. 7.2-9
7.2.9 TP5 Coupler RF Feedback to PCIC ........................................................................................ 7.2-10
7.2.10 TP6 PCIC Control Voltage ...................................................................................................... 7.2-11
7.2.11 PP7 TX LO .............................................................................................................................. 7.2-12
7.2.12 PP8 Higher Level Voltage Multiplier........................................................................................ 7.2-13
7.2.13 PP9 Superfilter Output ............................................................................................................ 7.2-14
7.2.14 PP11 Prescalar Input to FracN Synthesizer............................................................................ 7.2-15
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August 16, 2007