Icom IC-RP1620 Service Manual page 31

6.5 TRANSMITTER ADJUSTMENT
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit
6 - 5
VALUE
ADJUSTMENT
POINT
UNIT
ADJUSTMENT CONDITIONS
[LOCAL INHIBITI switch: ON
Set the FM deviation meter as:
HPF : OFF
LPF
: 20 kHz
De-emphasis: OFF
Detector
: (P-P)12
Transmitting
(
Ground the [MICROPHONE]
connector (pin 5).
2
ADJUST
MEASUREMENT
ADJUSTMENT
DEVIATION
( ; E )
$5 (LOGIC-A UNIT) switch: push
once
UNIT
Rear
panel
1
R32
LOCATION
Connect the FM
deviation meter to
the ANT]
connector via the
attenuator.
0.8 kHz
DEVIATION
(MI C ROPHONE)
DEVIATION
(REPEATER)
TX
3
1
2
3
1
2
After adjustment, turn the [LOCAL INHIBITI switch OFF, and push S5 again.
R54
Verify
TX 4.2 kHz
(Wide version)
2.1 kHz
(Narrow version)
4.0-5.0 kHz
(Wide version)
2.0-2.5 kHz
(Narrow version)
After adjustment, turn the [LOCAL INHIBIT] switch OFF.
Connect the FM
deviation meter to
the [TX ANT]
connector via the
attenuator.
[LOCAL INHIBIT] switch : ON
Connect the audio generator to the
[MICROPHONE] connector and set
as :
Level : 4 mV
Modulation : 1.0 kHz
Set the FM deviation meter as:
HPF : OFF
LPF
:
20 kHz
De-emphasis: OFF
Detector : (P-P)12
Transmitting
Set the audio generator as:
Level
: 40 mV
Rear
panel
*Connect the SSG to the [RX ANT]
connector and set as:
Level : 1 .O mV* (-47 dBm)
Modulation : 1 kHz
Deviation
: f 3 . 5 kHz
(Wide version)
f 1.75 kHz
(Narrow version)
Set the FM deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector
: (P-P)I2
Transmitting
Set the SSG as :
Level : 1.0 mV*(-47 dbm)
Modulation : 1 kHz
Deviation :
f
5.0 kHz
(Wide version)
f 2.5 kHz
(Narrow version)
LOGIC R33
Verify
3.5 kHz
(Wide version)
1.75 kHz
(Narrow version)
Rear
panel
3.5-5.0 kHz
(Wide version)
1.75-2.5 kHz
(Narrow version)
Connect the FM
deviation meter to
the [TX ANT]
connector via the
attenuator.