Receive Adjustment - Icom IC-M304 Service Manual

5-4 RECEIVE ADJUSTMENT

ADJUSTMENT
RECEIVE 1 • Channel
SENSITIVITY • [SQUELCH] : Open
• Connect an external speaker to the [EXT SP]
lead receptacle.
• Connect an SSG to the antenna connector
and set as;
Frequency : 156.800 MHz
Level
Modulation : 1 kHz
Deviation
• Receiving
†;
The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
• ADJUST&CHECK POINTS LOCATION (RECEIVE)
ADJUSTMENT CONDITION
: CH16 (156.800 MHz)
(Max. counterclockwise)
†
: 0 dBu (−107 dBm)
: ±3.0 kHz
RECEIVE SENSITIVITY
CHECK POINT
CONNECTION
1) Connect a DC voltmeter to the check point 'RSSI.'
2) Adjust in sequence L6, L7, L8 and L9.
(Repeate the adjustment at least twice.)
"RSSI"
5 - 4
VALUE
Maximum
voltage
L6
L7
L8
L9