Receiver Adjustments - Icom IC-M604 Service Manual

5-3 RECEIVER ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDITION
SENSITIVITY
1 • Operating channel : ch 16
(Except chan-
• Connect a tracking generator's
nel 70)
output to the antenna connector
and set as:
Level
(Channel 70)
2 • Operating channel : ch 70
• Connect an SSG to the antenna
connector and set as:
Frequency
Level
Modulation
Deviation
• Set the internal speaker OFF in
the SET mode, and connect a
distortion meter with a 4 Ω load
to [EXT SP] receptacle.
• Receiving
*This output level of a standard signal generator (SSG) is indicated as SSG's open circuit.
MEASUREMENT
UNIT
MAIN Connect a tracking
generator's input to
the MAIN unit; J3.
: 7.1 mV*
(–30 dBm)
MAIN Connect a DC volt-
meter to check point
CP3.
: 156.525 MHz
: 10 µV*
(–97 dBm)
: 1 kHz
: ±3.5 kHz
5 - 3
VALUE
LOCATION
Set the flat wave form
as shown below.
Maximum voltage
ADJUSTMENT
POINT
UNIT ADJUST
MAIN L11
L12
L13
L14
L15
MAIN L31
L32
L33
L34