5 - 4
5-4 RECEIVER ADJUSTMENT
SENSITIVITY
• Operating channel : ch16
• [SQUELCH] control :
Max. counterclockwise
• Connect an SSG to the antenna
connector and set as:
Frequency
: 156.800 MHz
Level
: 1 µV*
(–107 dBm)
Modulation
: 1 kHz
Deviation
: ±3.0 kHz
• Receiving
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
MAIN
• Connect the dis-
tortion meter to the
[EXT SP] jack with
a 4
Ω
load.
• Connect a DC volt-
meter to the check
point RSSI.
Maximum voltage
MAIN
L6,
L7,
L8,
L9
*This output level of a standard signal generator (SSG) is indicated as SSG’s closed circuit.
L6
Receiver sensitivity
adjustment
L7
L8
L9
Summary of Contents for IC-M302
Page 1: ...SERVICE MANUAL VHF MARINE TRANSCEIVER M302 ...
Page 29: ... BOTTOM VIEW DS4 DS5 DS7 DS6 DS2 DS3 9 4 ...
Page 30: ...J 1 R 1 1 5 HVS VOL1 VOL2 GND HV J1 to the MAIN unit W1 9 3 VR BOARD TOP VIEW BOTTOM VIEW 9 5 ...
Page 31: ...J 1 R 1 1 3 SQLI SQLV GND J1 to the MAIN unit W1 9 4 SQL BOARD TOP VIEW BOTTOM VIEW 9 6 ...
Page 32: ...9 7 R1 R3 R2 S2 S3 S4 R4 9 5 HM 141 TOP VIEW ...
Page 33: ...9 8 BOTTOM VIEW C1 S1 ...
Page 40: ......
Page 41: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14011IZ C1 2003 Icom Inc ...