Codan NGT 2010 RF Technical & Service Manual page 23

NRI 249
brief description 259
dismantling 275
drawings 289
fault finding 269
LED indicators 273
overview 250
parts lists 287
pin connections 254
,
specifications 249 252
technical description 263
test procedures 277
upgrading firmware 271
NRI Microcontroller PCB
technical description 265
testing 280
NRI User Connect PCB
technical description 264
testing 283
NRI Vocoder PCB
technical description 267
testing 281
O
ordering information 31
overview 249
,
3012 291 292
,
8571 319 320
,
high power 207 208
,
NGT 33 34
,
NRI 249 250
P
PA
adjusting
active bias 184
balance control 185
bias gain 182
checking intermodulation 187
driver bias 176
high output power 180
low output power 182
PA gain 189
PA PCB
,
supply voltages 74 108
,
transmit path 81 113
packaging 26
parts lists
3012 315
8571 361
high power 245
NGT 197
NRI 287
NGT Transceiver System Technical Service Manual
,
151
PCB
microprocessors and control
Application Processor 98
Application Processor Handset & Data I/F 126
Application Processor Handset I/F 3 V 126
Audio & Interconnect 127
Audio Interconnect & Data I/O 127
Audio Interface 99
Filter and Control 100
,
RF/IF 99 127
receive path
Audio & Interconnect 119
Audio Interconnect & Data I/O 119
Audio Interface 91
supply voltages
Application Processor 73
Application Processor Handset & Data I/F 107
Application Processor Handset I/F 3 V 107
,
Audio 72 147
Audio & Interconnect 106
Audio Interconnect & Data I/O 107
,
Audio Interface 73
Backplane 353
Dual Line Equaliser 354
Filter and Control 74
, ,
Handset 72 106 147
,
Microprocessor 72
Microprocessor & TCVR Interface 353
, ,
PA 74 108 151
, , ,
RF/IF 73 74 108
transmit path
Application Processor 78
Application Processor Handset & Data I/F 110
Application Processor Handset I/F 3 V 110
Audio & Interconnect 109
Audio Interconnect & Data I/O 109
Audio Interface 77
,
PA 81 113
,
RF/IF 79 110
pin connections
3012 297
8571 324
high power 211
NGT 41
NRI 254
power
output
checking 195
power supply
3012 305
8571 336
,
127
,
149
,
149
,
148
,
149
148
, ,
108 151
147
,
150 151
Index
,
150
Index-3