Codan NGT 2010 RF Technical & Service Manual page 59

,
handset data 97 125
Handset PCB
,
supply voltages 72 106
,
handset transmit path 59 66
harmonic emissions 40
headphone connector
pinouts 53
heatsink 39
high output power
adjusting 180
hot keys
Service mode 157
I
,
IF amplifier 89 117
image rejection 38
impedance 36
,
input low-pass filters 87 116
,
intermodulation 38 40
,
checking 187 195
distortion 187
inband 39
internal voice encryptor 101
J
junction box
connectors
CIB 50
GPIO 52
handset 49
serial data 51
speaker 50
control 97
EEPROM 98
microprocessor 97
,
receive path 60 92
size 37
,
transmit path 59 75
weight 37
K
,
keypad 96 124
testing 159
L
,
local oscillator 94 121
low output power
adjusting 182
low-pass filter 152
NGT Transceiver System Technical Service Manual
,
147
,
128
M
, ,
microphone 40 75 109
Microprocessor PCB
,
supply voltages 72 147
transmit path 75
microprocessors and control
2010 96
2011/2012 124
mixer
,
first 79 111
,
second 80 112
modulator
,
transmit 79 111
mute
adjusting 175
,
voice 91 120
N
NGT test handset 146
,
noise limiter 88 117
aligning 169
checking 193
Normal mode
returning to 158
O
operating modes 36
options
transmit disable 132
transmit enable 132
transmit prohibited 133
output
,
filters 83 114
power 39
,
stage 83 114
,
oven controller 93 121
oven warm up time 36
,
overview 33 34
P
PA
adjusting 176
active bias 184
balance control 185
bias gain 182
checking intermodulation 187
driver bias 176
high output power 180
low output power 182
PA bias 178
PA gain 189
PA PCB
,
supply voltages 74 108
,
transmit path 81 113
NGT—Index
,
151
NGT Index-3