![background image](http://html.mh-extra.com/html/icom/ic-m304/ic-m304_service-manual_612754015.webp)
5 - 3
5-3 TRANSMIT ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
OPERATION
VALUE
TRANSMIT
OUTPUT
POWER
1 • Channel
: CH16 (156.800 MHz)
• Output power
: High
• Connect an RF power meter to the ant-
enna connector.
• Transmitting
Adjust R135 (PWR).
23.5 W
DEVIATION
1 • Channel
: CH16 (156.800 MHz)
• Output power
: Low
• Connect an audio generator to the ‘MIC’
line (see the picture below), and set as;
Frequency
: 1 kHz
Level
: 140 mV
• Connect an FM deviation meter to the ant-
enna connector through an attenuator,
and set as ;
HPF
: OFF
LPF
: 20 kHz
De-emphasis : OFF
Detector
: (P–P)/2
• Transmitting
Adjust R184 (DEV).
±4.3 kHz
• ADJUST&CHECK POINTS LOCATION (TRANSMIT)
KEYM
GND
MIC
MICG
PTT
1
5
+
–
–
+
AC millivoltmeter
Audio generator
[PTT]
J2
R135 (PWR)
TRANSMIT OUTPUT POWER
ADJUSTMENT POINT
R184 (DEV)
DEVIATION
ADJUSTMENT POINT