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5 - 3
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
OPERATION
UNIT
ADJUST
OUTPUT
POWER
1
• Channel : CH16 (156.800 MHz)
• Output power : High
• Transmitting
Rear
Panel
Connect an RF power
meter to the antenna
connector.
23–23.5 W
MAIN
R112
FREQUENCY
DEVIATION
1
• Channel : CH16 (156.800 MHz)
• Output power : Low
• Connect an audio generator to the pin 28
of J4 (MAIN UNIT) and set as;
Frequency : 1 kHz
Level : 30 mV
• Set the FM deviation meter as;
HPF : OFF
LPF : 20 kHz
De-emphasis: OFF
Detector : (P−P)/2
• Transmitting
Rear
Panel
C o n n e c t a n F M
deviation meter to the
antenna con-nector
through an attenuator.
±4.25–4.35 kHz
MAIN
R327
R112
R327
Output power adjustment
Frequency deviation
adjustment
+
–
+
–
AC millivoltmeter
Audio generator
J4
29
28
5-3 TRANSMIT ADJUSTMENT
Summary of Contents for IC-M422
Page 1: ...3 26 5 6 2 42 3 6 2 iC m422 ...
Page 6: ...2 1 SECTION 2 INSIDE VIEWS FRONT UNIT MAIN UNIT ...
Page 23: ...7 2 IC M422 sm indd 9 10 4 21 2005 1 01 32 PM ...
Page 24: ...8 1 SECTION 8 SEMICONDUCTOR INFORMATION TRANSISTOR AND FET S DIODES ...
Page 29: ...10 1 SECTION 10 BLOCK DIAGRAM IC M422 sm indd 21 22 4 21 2005 1 01 39 PM ...
Page 32: ...11 3 11 2 LOGIC BOARD IC M422 sm indd 27 28 4 21 2005 1 01 44 PM ...
Page 35: ...S 14131MZ C1 2005 Icom Inc ...