Pll Adjustment - Icom IC-2SET Service Manual

6-2
PLL
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT
CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION UNIT
ADJUST
LOCK
voltage
1
* Displayed frequency:
1
45.00
MHz
*
Simplex
Transmitting
PLL
Connect
the
oscilloscope to C6.
(L2 side)
1.6
V
DC
PLL
L2
2
* Receiving
1
.6
V
DC
L1
3
Install
the shielding
plaie,
Readjust L2 and
Li
when
ihe
lock voltage
is
changed.
REFERENCE
FREQUENCY
1
Djsplayed frequency: 146.00
MHz
•
Connect
the
RF
power meter
or
a
50
0
dunfimy
toad.
• TransmiUlng
Top
panel
Loose couple the
frequency counter
to
Ihe
antenna
connector,
146.0000
MHz
PLL C22
PLL UNtT
Lock voltage
adjust
ment
PLL UNtT
C22
Reference frequency adjustment
C6
Lock voltage
CP
6
—
2