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Step
Adjustment
item
6
Adjustment of
front end 1FT
7
Verification of monau-
ral distortion
8
Verification
of stereo
distortion
9
Verification
of sensi-
tivity
10
Adjustment of
Separation
11
Adjustment
of Signal
meter
12
Verification
of auto
tuning
• : Execution of FACTORY PRESET (Refer to page 7.) will facilitate setting reception frequency for adjustment.
Reception
Signal (ANT IN)
frequency
98.1MHz
FM ANT (750)
' (A-4)
98.1MHz
3OdBµ
MONO
1kHz,
100% modulation
98.1MHz
FM ANT (750)
' (A-4)
98.1MHz
70dBµ
MONO 1kHz,
100% modulation
98.1MHz
FM ANT (750)
' (A-4)
98.1MHz
'Tuning
70dBµ
mode
Stereo L or R
should be
1kHz,
AUTO.
100% modulation
88.1MHz
FM ANT (750)
• (A-6)
88.1MHz
98.1MHz
98.1MHz
106.1MHz
• (A-4)
106.1MHz
• (A-7)
98.1MHz
FM ANT (750)
• (A-4)
98.1MHz
70dBµ
Stereo
Lor R
1kHz,
100% modulation
98.1MHz
FM ANT (750)
• (A-4)
98.1MHz
45dBµ
MONO 1kHz
30% modulation
-1 OdBµ or less
98.1MHz
FM ANT (750)
98.1MHz
23dBµ
Stereo L or R
1kHz,
30% modulation
Adjusted
Test point
point
Front end 1FT
Pin 16 of IC1
RECOUT
L, R
RECOUT
L, R
ANT (750)
VR2
RECOUT
L, R
VR1
RX-V990
Rating
Adjust so that the DC voltage
is maximum.
CAUTION:
Over-adjustment
of the 1FT core will reduce the
sensitivity.
Maximum ±90°
0.4% or less
1% or less
• STEREO
indicator
should
light.
1) Set the tuning mode to MAN'L
MONO (Muting OFF).
2) SIN
should be 30dB at each
frequency
of 88.1MHz,
98.1 MHz, and 106.1 MHz.
3) Check to ensure
that the
voltage at the ANT terminal
is 3dBµ (14.25dBf) or less.
With SSG output at L or R, the
signal
leakage
level at the
other channel should be mini-
mized.
36dB or more
Adjust
so that
all signal
meters light.
Check to ensure that signal
meters turn OFF.
• Automatic reception
should be available when
the tuning key is moved UP
and DOWN.
• The stereo indicator should
light.
• Audio muting should be ap-
plied during tuning.
12
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