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＜ ＜ ＜ ＜ MW / LW ADJUSTMENT＞ ＞ ＞ ＞
For MW / LW adjustment, do wiring and connection as in the following.
Standerd Signal Generaor
５． IF ADJUSTMENT (MW)
５．
５．
５．
Requirement
Measuring equipment: Oscilloscope or Millivoltmeter
Test point: TP7 (IC771 24pin), GND
Adjustment point: L772
(1) Adjust the setting of Standard Signal Generator (hereinafter S.S.G.) to 450KHz
of 30％ variation.
(2) While looking at the waveform on the oscilloscope, reduce the output level all the
way.
(3) Adjust L772 until the waveform of the oscilloscope reaches the maximum.
６．
６． TRACKING ADJUSTMENT (MW)
６．
６．
TE
L 13942296513
Requirement
Measuring equipment: Millivoltmeter
Test point: TP2, TP3, GND
Adjustment point: L773
(1) Adjust the S.S.G. setting to 1000KHz of 30% variation and reduce the output level
all the way.
(2) Adjust the reception frequency of the main unit to 1000KHz.
(3) Adjust L773 until the value of the millivoltmeter reaches the maximum.
７． TRACKING ADJUSTMENT (LW)
７．
７．
７．
Requirement
Measuring equipment: Millivoltmeter
Test point: TP2, TP3, GND
Adjustment point: TC941, L941
(1) Adjust the S.S.G. setting to 290KHz of 30% variation and reduce the output level all
the way.
(2) Adjust the reception frequency of the main unit to 290KHz.
(3) Adjust LTC941 until the value of the millivoltmeter reaches the maximum.
(4) Adjust the S.S.G. setting to 144KHz of 30% variation and reduce the output level all the way
(5) Adjust the reception frequency of the main unit to 144KHz
(6) Adjust LTC941 until the value of the millivoltmeter reaches the maximum.
(7) Repeat the adjustment 2 to 3 times from 1 to 6 above.
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2 9
8
SET
Rch
GND
Q Q
3
6 7
1 3
1 5
co
.
-29-
9 4
2 8
TP
Lch
Connect to the respective
measuring equipment
OSCILLOSCOPE
CH1
Lch
Rch
GND
0 5
8
2 9
9 4
2 8
AC MILLIVOLTMETER
TP2
GND
TP3
AC MILLIVOLTMETER
TP2
GND
TP3
m
9 9
GND
CH2
9 9
CH2
CH1
GND
CH1
CH2
GND
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