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SA-107H |
©
MW/LW
IF/RF ADJUSTMENT
Electronic
© Set the wave band selector switch at MW position.
AM Signal generator
voltmeter
© Set the signal generator to produce a signal of 400Hz,
Loop antenna MW/LW
30%, AM modulated.
SSD
paractenns
ESE
FRE-
DIAL
AD-
O
q
QUEN- | POINTER | JUST-
REMARKS
L6
STAGE | "cy | SETTING | MENT
TPi01 @
Ground
Figure 14—1
AM
IF/RF ADJUSTMENT
MW IF (Connect instruments as shown in Fig. 14—1.)
High
;
Adjust
for best
"IF"
Frequency
Tez
Curve
B13kHz | LOWest | 1104
Band
frequency
:
coverage
Highest
l650Hz
frequency
TC103
Adjust
for
maximal
Site
455kHz
Tracking
Figure 14—2
Tune to
1400kHz
1400kHz
TC101
Repeat steps 2, 3 and 4, 5 until nonfurther improvement can be
Electronic
made.
voltmeter
T P801@( L-ch)
T P802@(R-ch)
TP80I@(L-ch) |
DIAL
T P8020(R-ch)
POINTER
REMARKS
*
SETTING
Figure 14-3
LW RF (Connect instruments as shown in Fig. 14—1.)
@ Set the wave band selector switch at.LW position.
@ Set the signal generator to produce a signal of 400Hz,
30%, AM modulated.
Lowest
144kHz
Band
frequency
coverage
Highest
380kHz
frequency
Adjust
for
maximal
output.
Tune to
170KH2 | 470kHz
Tracking
Tune to
340kHz
340kHz
Repeatsteps 1, 2 and 3, 4 until no further improvement can be made.
ADJUSTMENT OF AMPLIFIER CIRCUIT
1.. Make a connection
of instruments as. shown
in Fig.
=
aT
|
14—3, and set the volume
control at the minimum
position.
®
2. Adjust the variable resistor VR801 (for the left channel)
'er
2.
and/or
VR802
(for the
right channel)
so
that the
electronic
voltmeter
reads
0.7. to
1.5mV.
within
5
seconds after the power switch has been turned on.
3. 10 to 15 minutes thereafter, see that the electronic
voltmeter's reading is 1 to 4mV.
PRESET
4,
ovr
Figure 14—4 ADJUSTMENT POINTS
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