NGT—Index
NGT Transceiver System Technical Service Manual NGT Index-5
RF/IF PCB 99, 127
supply voltages
73, 74, 108, 150, 151
transmit path
79, 110
RS232 programming port
97, 125
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, 150
Application Processor Handset I/F 3 V PCB
107, 149
Application Processor PCB
73, 149
Audio & Interconnect PCB
106, 148
Audio Interconnect & Data I/O PCB
107, 149
Audio Interface PCB
73, 148
Audio PCB
72, 147
Filter and Control PCB
74, 108, 151
Handset PCB
72, 106, 147
Microprocessor PCB
72, 147
PA PCB
74, 108, 151
RF/IF PCB
73, 74, 108, 150, 151
suppression
carrier
40
switching
36
transmit/receive
79, 110
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, 111
prohibited
133
transmit path
brief description
2010
59
2011/2012
66
CIB
77
first mixer
79, 111
handset
59, 66
junction box
59, 75
RF unit
2010
59
2011/2012
66
second mixer
80, 112
technical description
2010
75
2011/2012
109
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