Codan NGT 2010 RF Technical & Service Manual page 61

,
RF/IF PCB 99 127
, ,
supply voltages 73 74
,
transmit path 79 110
RS232 programming port 97
Rx filter
aligning 167
S
second IF filter 102
second mixer
,
receive path 88 117
,
transmit path 80 112
selectivity 38
checking 192
sensitivity 38
sensitivity and (signal + noise)/noise ratio
checking 190
serial data connector
pinouts 51
Service mode 153
accessing 154
channels 156
exiting 158
hot keys 157
sideband
unwanted 40
signal
input 39
size
handset 37
junction box 37
RF unit 37
speaker connector
pinouts 50
,
specifications 33 36
general 36
receiver 38
transmitter 39
spurious
emissions 40
responses 38
,
standby power 96 124
,
supply current 37 39
, ,
supply voltages 36 72 106
Application Processor Handset & Data I/F PCB 107
Application Processor Handset I/F 3 V PCB 107
Application Processor PCB 73
Audio & Interconnect PCB 106
Audio Interconnect & Data I/O PCB 107
Audio Interface PCB 73
,
Audio PCB 72 147
Filter and Control PCB 74
, ,
Handset PCB 72 106
Microprocessor PCB 72
, ,
PA PCB 74 108 151
, ,
RF/IF PCB 73 74 108
NGT Transceiver System Technical Service Manual
, ,
108 150 151
,
125
,
,
149
,
148
,
149
,
148
, ,
108 151
147
,
147
, ,
150 151
suppression
carrier 40
switching 36
transmit/receive 79
synthesiser operation
2010 61
2011/2012 68
T
TDM audio
channels 76
generation 91
reconstruction 92
technical description
2010 69
frequency control 93
microprocessors and control 96
receive path 87
transmit path 75
2011/2012 103
frequency control 121
microprocessors and control 124
receive path 116
transmit path 109
temperature 37
test
display 159
equipment 146
keypad 159
points 160
unit 146
tone generation 98
TPE link 132
transmit
disable 132
programming 137
enable 132
frequency
checking 194
modulator 79
prohibited 133
transmit path
brief description
2010 59
,
150 2011/2012 66
149 CIB 77
first mixer 79
handset 59
junction box 59
RF unit
2010 59
2011/2012 66
second mixer 80
technical description
2010 75
2011/2012 109
,
110
,
111
,
111
,
66
,
75
,
112
NGT—Index
NGT Index-5