Codan NGT 2010 RF Technical & Service Manual page 755

8571—Index
Numerics
15-way GPIO connector
pinouts 329
2-wire interface
receive path 338
transmit path 340
3-line capability 350
4-line capability 350
4-wire interface
receive path 339
transmit path 340
A
audio
,
gate 338 341
receive path 337
transmit path 340
automatic equalisation 348
B
backplane 336
Backplane PCB
supply voltages 353
brief description 331
bus
internal 343
microcontroller 343
Rx audio 338
Tx audio 341
C
connectors
15-way GPIO 329
DC Supply 326
line 327
Option I/O 325
Tcvr Audio 325
Tcvr Control 324
control tone
detection 344
generation 344
D
DC Supply connector
pinouts 326
dismantling 352
drawings 363
Dual Line Equaliser PCB
supply voltages 354
NGT Transceiver System Technical Service Manual
E
environmental specifications 322
equalisation 340
,
automatic 334 348
F
,
fault finding 351 353
no reception, with signalling 356
no reception, without signalling 357
no signalling 354
no transmission, with signalling 359
voltage measurements 353
filter
low-pass 341
G
gain stage 340
general specifications 322
H
hybrid
receive path 338
transmit path 340
I
internal bus 343
L
line connector
pinouts 327
line driver
receive path 338
M
master control site
equipment 321
microcontroller 334
bus 343
microprocessor 343
Microprocessor & TCVR Interface PCB
supply voltages 353
N
notch filter
transmit path 342
CODAN
8571 Index-1