Pll Adjustment; Receiver Adjustment - Icom IC-24AT Service Manual

6-2 PLL
ADJUSTMENT
ADJUSTMENT ADJUSTMENT
CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION
UNIT
ADJUST
REFERENCE
FREQUENCY
1
•
Frequency
display:
440.00
MHz
•
Transmitting
Top
panel
Loosely couple
the
frequency
counter
to
the
antenna
connector.
440.000
MHz MAIN C54
6-3
RECEIVER
ADJUSTMENT
An.MIQTMPNT
ADJUSTMENT CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION UNIT
ADJUST
UHF
SENSITIVITY
1
•
Frequency display;
434.90
MHz
(except
USA)
444.90
MHz
(USA)
•
Set
the signal
generator;
Level
:
1 0
p
V* (-87
dBm)
Dev.
:
±3.5
kHz
Mod.
:1kHz
•
[SQL]
control:
Max.
CCW
•
Receiving
LOGIC
Connect
the
oscilloscope
to
CPI.
Maximum
U.
COIL Adjust
in
sequence
LI
L2
L3
VHF
SENSITIVITY
1 •
Frequency
display:
146.00
MHz
(except
EUR,
UK)
145.00
MHz
(EUR,
UK)
•
Set the
signal
generator;
Level
:
20 pV*
(-81
dBm)
Dev.
;
±3.5
kHz
Mod.
:
1
kHz
LOGIC
Connect
the
oscilloscope
to
CPI.
Maximum
V.
COIL
Adjust
in
sequence
LI
L2
L3
L4
S-METER
1
•
Frequency
display:
435.00
MHz
(except
USA)
445.00
MHz
(USA)
•
Set
the signal generator;
Level
:
0.35
pV*
(-116 dBm)
Dev.
:
±3.5
kHz
Mod. :1kHz
FUNCTION
DISPLAY
S/RF
indicator
2 dots
DET
R26
2
•
Frequency
display:
146.00
MHz
(except
EUR, UK)
145.00
MHz
(EUR, UK)
•
Set
the signal
generator;
Level
:
0.35
pV*
(-11 6
dBm)
Dev.
:
±3.5
kHz
Mod.
:
1
kHz
R4
CCW:
Counterclockwise
•This output level of
standard
signal
generator
(SSG)
is
indicated
as
SSG's open
circuit.
6-2