Motorola ASTRO XTL 1500 Detailed Service Manual page 449

Index-viii
transmitter
136-174 MHz band
50-Watt
ON (output network)
antenna switch .......................................... 3-31
harmonic filter ............................................ 3-31
introduction ................................................ 3-30
power detector .......................................... 3-31
power control ................................................ 3-31
RFPA
driver stage ............................................... 3-30
final stage .................................................. 3-30
first stage ................................................... 3-30
introduction ................................................ 3-29
components ........................................................ 2-6
power control
power control loop ........................................ 3-32
protection mechanisms ................................. 3-33
theory of operation ........................................... 3-29
380-470 MHz band
40-Watt
ON (output network)
antenna switch .......................................... 3-35
harmonic filter ............................................ 3-35
introduction ................................................ 3-34
power detector .......................................... 3-35
power control ................................................ 3-35
RFPA
driver stage ............................................... 3-34
final stage .................................................. 3-34
first stage ................................................... 3-34
introduction ................................................ 3-33
components ........................................................ 2-6
power control
power control loop ........................................ 3-36
protection mechanisms ................................. 3-37
theory of operation ........................................... 3-33
450-520 MHz band
45-Watt
ON (output network)
antenna switch .......................................... 3-39
harmonic filter ............................................ 3-39
introduction ................................................ 3-38
power detector .......................................... 3-39
power control ................................................ 3-39
RFPA
driver stage ............................................... 3-38
final stage .................................................. 3-38
first stage ................................................... 3-37
introduction ................................................ 3-37
power control
power control loop ........................................ 3-40
protection mechanisms ................................. 3-41
theory of operation ........................................... 3-37
700-800 MHz band
35-Watt
ON (output network)
antenna switch .......................................... 3-43
harmonic filter ............................................ 3-43
power detector .......................................... 3-43
June 15, 2005
RFPA
driver stage ............................................... 3-42
final stage .................................................. 3-42
first stage .................................................. 3-42
introduction ............................................... 3-41
components ........................................................ 2-7
power control
power control loop ........................................ 3-44
protection mechanisms ................................. 3-45
theory of operation ........................................... 3-41
circuit protection ..................................................... 2-7
description ........................................................... 3-29
ON (output network) .............................................. 2-7
power control ......................................................... 2-7
primary components .............................................. 2-6
RFPA ..................................................................... 2-7
troubleshooting
board ID jumper configuration ............................. 5-10
charts
introduction ......................................................... 5-1
list ....................................................................... 5-1
daughtercard module ............................................. 4-2
FGU troubleshootong aids
136-174 MHz band ............................................. 4-7
380-470 MHz band ........................................... 4-13
450-520 MHz band ........................................... 4-19
700-800 MHz band ........................................... 4-24
flowcharts
136-174 MHz 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
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 oscillator frequency . 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
6815854H01-A