Motorola ASTRO XTL 1500 Detailed Service Manual page 444

transmitter VCOs .............................................. 3-57
voltage multiplier ............................................... 3-55
700-800 MHz band
charge pump bias ............................................. 3-60
description .......................................................... 2-8
lock detect ........................................................ 3-60
loop filter ........................................................... 3-60
LV Frac-N synthesizer ...................................... 3-59
modulation ........................................................ 3-60
prescaler feedback ........................................... 3-62
receiver injection .............................................. 3-61
receiver VCOs .................................................. 3-62
reference oscillator ........................................... 3-59
superfilter .......................................................... 3-60
transmitter injection .......................................... 3-61
transmitter VCOs .............................................. 3-61
voltage multiplier ............................................... 3-59
description ............................................................ 3-45
theory of operation
136-174 MHz band ........................................... 3-45
380-470 MHz band ........................................... 3-49
450-520 MHz band ........................................... 3-54
700-800 MHz band ........................................... 3-58
front-end receiver section
136-174 MHz band
low-noise amplifier (LNA) ................................. 3-17
mixer ................................................................. 3-18
overview ............................................................. 2-5
PIN diode switches ........................................... 3-17
preselector filters .............................................. 3-17
step attenuator ................................................. 3-17
theory of operation ........................................... 3-16
380-470 MHz band
first low-noise amplifier ..................................... 3-19
highpass filter ................................................... 3-19
image filter ........................................................ 3-19
low-noise amplifier (LNA) ................................. 3-19
mixer ................................................................. 3-19
overview ............................................................. 2-5
preselector filters .............................................. 3-19
switchable attenuator ....................................... 3-19
theory of operation ........................................... 3-18
450-520 MHz band
first low-noise amplifier ..................................... 3-20
highpass filter ................................................... 3-20
image filter ........................................................ 3-21
low-noise amplifier (LNA) ................................. 3-21
mixer ................................................................. 3-21
preselector filters .............................................. 3-21
switchable attenuator ....................................... 3-21
theory of operation ........................................... 3-20
700-800 MHz band
low-noise amplifier (LNA) ................................. 3-22
mixer ................................................................. 3-23
overview ............................................................. 2-6
preselector filters .............................................. 3-22
theory of operation ........................................... 3-22
functional blocks, radio .............................................. 2-1
G
glossary of terms ........................................... Glossary-1
6815854H01-A
H
handling precautions ................................................. 4-1
harmonic filter
136-174 MHz band .............................................. 3-31
380-470 MHz band .............................................. 3-35
450-520 MHz band .............................................. 3-39
700-800 MHz band .............................................. 3-43
highpass filter, receiver front-end
380-470 MHz band .............................................. 3-19
450-520 MHz band .............................................. 3-20
I
IF
filter
receiver back-end
380-470 MHz band ....................................... 3-25
450-520 MHz band ....................................... 3-26
700-800 MHz band ....................................... 3-28
receiver back-end (136-174 MHz band) .............. 3-23
receiver section, overview ..................................... 2-5
image filter, receiver front-end (380-470 MHz band) 3-19
image filter, receiver front-end (450-520 MHz band) 3-21
introduction, manual .................................................. 1-1
J
jumper configuration, board ID ................................ 5-10
L
list
component location diagrams
main board ......................................................... 7-1
flex cables .............................................................. 8-1
schematics
main board ......................................................... 7-1
troubleshooting charts ........................................... 5-1
waveforms ............................................................. 6-1
local oscillator
1st
136-174 MHz band ........................................... 3-49
380-470 MHz band ........................................... 3-52
450-520 MHz band ........................................... 3-57
700-800 MHz band ........................................... 3-61
2nd
136-174 MHz band ........................................... 3-24
380-470 MHz band ........................................... 3-26
450-520 MHz band ........................................... 3-27
700-800 MHz band ........................................... 3-29
low-noise amplifier (LNA), receiver front-end
136-174 MHz band .............................................. 3-17
380-470 MHz band .............................................. 3-19
450-520 MHz band .............................................. 3-21
700-800 MHz band .............................................. 3-22
low-noise amplifier, first, receiver front-end,
380-470 MHz band ........................................... 3-19
low-noise amplifier, first, receiver front-end,
450-520 MHz band ........................................... 3-20
Index-iii
June 15, 2005