Motorola ASTRO XTL 1500 Detailed Service Manual page 443

Index-ii
D
daughtercard module
overview ............................................................... 2-10
theory of operation ............................................... 3-64
troubleshooting ...................................................... 4-2
DC power distribution
136-174 MHz band .............................................. 3-16
380-470 MHz band .............................................. 3-15
450-520 MHz band .............................................. 3-15
700-800 MHz band .............................................. 3-16
introduction .......................................................... 3-15
DSP system clock .................................................... 3-68
E
errors
operational codes ................................................... 4-5
power-up self-check ............................................... 4-3
external bus serial communications, controller ........ 3-70
F
filter
harmonic
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, receiver front-end
(380-470 MHz band) ..................................... 3-19
highpass, receiver front-end
(450-520 MHz band) ..................................... 3-20
loop
136-174 MHz band ........................................... 3-48
380-470 MHz band ........................................... 3-52
450-520 MHz band ........................................... 3-56
700-800 MHz band ........................................... 3-60
preselector, 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
receiver back-end IF
380-470 MHz band ........................................... 3-25
450-520 MHz band ........................................... 3-26
700-800 MHz band ........................................... 3-28
firmware, reflashing ................................................. 3-76
flash programming ................................................... 3-75
flex cables pin-out assignments ................................. 8-1
flowcharts, troubleshooting ...................................... 5-11
136-174MHz band
low or no RX injection signal ............................ 5-18
low or no TX injection signal ............................. 5-19
no output power and IDC ................................. 5-23
no output power at TX mode ............................ 5-22
poor RX sensitivity or no RX audio ................... 5-12
RX back-end-poor SINAD or no audio ............. 5-15
RX IF-poor SINAD or no audio ......................... 5-14
TX or RX VCO unlock (Fail 001) ...................... 5-20
380-470 MHz and 450-520 MHz bands
low or no RX injection signal ............................ 5-32
low or no TX injection signal ............................. 5-33
June 15, 2005
no 16.8 MHz reference oscillator frequency ..... 5-24
no TX audio ...................................................... 5-34
poor RX sensitivity or no RX audio .................. 5-25
RFPA power control-no VGBIAS ...................... 5-42
RFPA-no or low TX power output ..................... 5-37
RX back-end-poor SINAD or no audio ............. 5-29
RX IF-poor SINAD or no audio ......................... 5-27
TX or RX VCO unlock (Fail 001) ...................... 5-35
700-800 MHz band
low or no RX injection signal ............................ 5-50
low or no TX injection signal ............................ 5-51
no 16.8 MHz reference ..................................... 5-43
no TX audio ...................................................... 5-52
poor RX sensitivity or no RX audio .................. 5-44
RFPA power control-no K9.1V ......................... 5-60
RFPA power control-no or low
TX RFPA_CNTRL ..................................... 5-62
RFPA power control-no VGBIAS ...................... 5-61
RFPA-no or low TX power output ..................... 5-55
RX back-end-poor SINAD or no audio ............. 5-47
RX IF-poor SINAD or no audio ......................... 5-46
TX or RX VCO unlock (Fail 001) ...................... 5-53
frequency generation unit (FGU)
136-174 MHz band
charge pump bias ............................................. 3-48
description .......................................................... 2-7
lock detect ........................................................ 3-48
loop filter ........................................................... 3-48
LV Frac-N synthesizer ...................................... 3-46
modulation ........................................................ 3-47
prescaler feedback ........................................... 3-49
receiver injection .............................................. 3-49
receiver VCOs .................................................. 3-49
reference oscillator ........................................... 3-46
superfilter ......................................................... 3-47
transmitter injection .......................................... 3-48
transmitter VCOs .............................................. 3-49
voltage multiplier .............................................. 3-47
380-470 MHz band
charge pump bias ............................................. 3-52
description .......................................................... 2-8
lock detect ........................................................ 3-52
loop filter ........................................................... 3-52
LV Frac-N synthesizer ...................................... 3-50
modulation ........................................................ 3-51
prescaler feedback ........................................... 3-53
receiver injection .............................................. 3-52
receiver VCOs .................................................. 3-53
reference oscillator ........................................... 3-50
superfilter ......................................................... 3-51
transmitter injection .......................................... 3-52
transmitter VCOs .............................................. 3-53
voltage multiplier .............................................. 3-51
450-520 MHz band
charge pump bias ............................................. 3-56
lock detect ........................................................ 3-56
loop filter ........................................................... 3-56
LV Frac-N synthesizer ...................................... 3-55
modulation ........................................................ 3-56
prescaler feedback ........................................... 3-58
receiver injection .............................................. 3-57
receiver VCOs .................................................. 3-57
reference oscillator ........................................... 3-55
superfilter ......................................................... 3-56
transmitter injection .......................................... 3-57
6815854H01-A