Table Of Contents - Nokia RA-8 Rf Description And Troubleshooting

RA-8
7 - RF Description and Troubleshooting

Table of Contents

CMT RF................................................................................................................. 5
Top-level description.......................................................................................... 5
RA-8 test point locations ................................................................................... 6
Test points ......................................................................................................... 7
RF implementation in RA-8.............................................................................. 11
Frequency plan .............................................................................................. 11
RF block diagram ........................................................................................... 12
Antenna switch module (ASM) ....................................................................... 13
DC characteristics .......................................................................................... 13
RF characteristics ............................................................................................ 16
Channel numbers and frequencies ................................................................ 16
RF Troubleshooting .......................................................................................... 17
Receiver description and troubleshooting ........................................................ 17
Rx front end ................................................................................................... 17
Antenna ......................................................................................................... 17
Receiver characteristics ................................................................................. 18
General instructions for Rx troubleshooting ................................................... 19
Transmitter description and troubleshooting .................................................... 26
Power amplifier .............................................................................................. 26
RF ASIC Honi ................................................................................................ 26
AFC function .................................................................................................. 27
Transmitter characteristics ............................................................................. 27
General instructions for Tx troubleshooting ................................................... 27
Additional information for EDGE troubleshooting ............................................ 34
Pictures of EDGE transmitter signals ............................................................. 38
Synthesizer description and troubleshooting ................................................... 42
Frequency synthesizers ................................................................................. 42
General instructions for synthesizer troubleshooting ..................................... 42
Frequency Lists .............................................................................................. 47
RF tunings after repairs ................................................................................... 50
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