Motorola ASTRO Digital XTL 5000 Detailed Service Manual page 522

Index-vi
handling ................................................................. 4-1
heat-related ............................................................ 4-2
preselector filters, receiver front-end
136-174 MHz band .............................................. 3-14
380-470 MHz band .............................................. 3-16
450-520 MHz band .............................................. 3-18
700-800 MHz band .............................................. 3-19
programming flash ................................................... 3-75
publications, related ................................................... xxii
R
radio
136-174 MHz band
back-end receiver ............................................... 2-8
DC power distribution ....................................... 3-13
frequency generation unit ................................. 2-10
front-end receiver section ................................... 2-8
receiver ............................................................... 2-8
transmitter .......................................................... 2-9
380-470 MHz band
back-end receiver section .................................. 2-9
DC power distribution ....................................... 3-12
frequency generation unit ................................. 2-11
front-end receiver section ................................... 2-8
IF receiver section .............................................. 2-8
receiver ............................................................... 2-8
transmitter .......................................................... 2-9
450-520 MHz band
DC power distribution ....................................... 3-12
700-800 MHz band
back-end receiver section .................................. 2-9
DC power distribution ....................................... 3-13
frequency generation unit ................................. 2-11
front-end receiver section ................................... 2-9
receiver ............................................................... 2-9
transmitter ........................................................ 2-10
control-head assembly ........................................... 2-2
controller
B+ power routing .............................................. 3-65
DSP system clock ............................................ 3-68
MCU system clock ............................................ 3-68
power-up/power-down sequence ..................... 3-68
serial peripheral interface (SPI) bus ................. 3-71
theory of operation ........................................... 3-62
daughtercard module theory of operation ............ 3-64
functional blocks .................................................... 2-1
overview ................................................................. 2-1
power amplifier assembly ..................................... 2-10
power-up/power-down sequence ......................... 3-68
RF board
receiver back-end circuitry ................................ 3-20
theory of operation ............................................. 3-1
specifications
700-800 MHz ..................................................... xlvii
UHF Range 1 ...................................................... xlv
UHF Range 2 ..................................................... xlvi
VHF .................................................................... xliv
troubleshooting
precautions
handling .......................................................... 4-1
heat-related ..................................................... 4-2
procedures ......................................................... 4-1
waveforms .......................................................... 6-2
May 25, 2005
receive audio, controller .......................................... 3-72
receiver
136-174 MHz band
back-end
ABACUS III IC .............................................. 3-20
description ...................................................... 2-8
IF .................................................................. 3-20
introduction ................................................... 3-20
front-end
description ...................................................... 2-8
introduction ................................................... 3-13
low-noise amplifier (LNA) ............................. 3-14
mixer ............................................................. 3-15
PIN diode switches ....................................... 3-14
preselector filters .......................................... 3-14
step attenuator .............................................. 3-14
troubleshooting ............................................. 4-33
radios ................................................................. 2-8
380-470 MHz band
back-end
ABACUS III IC .............................................. 3-22
description ...................................................... 2-9
IF filter ........................................................... 3-22
introduction ................................................... 3-21
front-end
description ...................................................... 2-8
first low-noise amplifier (LNA) ....................... 3-16
highpass filter ............................................... 3-16
image filter .................................................... 3-16
introduction ................................................... 3-15
low-noise amplifier (LNA) ............................. 3-16
mixer ............................................................. 3-16
preselector filters .......................................... 3-16
switchable attenuator .................................... 3-16
troubleshooting ............................................. 4-33
IF section, description ........................................ 2-8
radios ................................................................. 2-8
450-520 MHz band
back-end
ABACUS III IC .............................................. 3-23
IF filter ........................................................... 3-23
introduction ................................................... 3-23
front-end
first low-noise amplifier (LNA) ....................... 3-17
highpass filter ............................................... 3-17
image filter .................................................... 3-18
introduction ................................................... 3-17
low-noise amplifier (LNA) ............................. 3-18
mixer ............................................................. 3-18
preselector filters .......................................... 3-18
switchable attenuator .................................... 3-18
troubleshooting ............................................. 4-34
700-800 MHz band
back-end
ABACUS III IC .............................................. 3-25
description ...................................................... 2-9
IF filter ........................................................... 3-25
introduction ................................................... 3-24
front-end ........................................................... 3-19
description ...................................................... 2-9
6881096C74-B