TH.
Distortion
is
less
than 1.0%.
Proceed
to next section.
(3)
FM MPX
OPERATION
CHECK
Adjust for FM MPX Alignment on
page
19.
Same equipment connection as
Figure
11.
Connect
FM
Stereo SG to
FM
SG.
(Figure
13)
Stereo
Modulation
MAIN
&
SUB
-
90%
(67.5
kHz dev.)
Pilot
8%
(
6
kHz dev.)
Frequency
98
MHz,
1
kHz
mod.
lnput 1 mV
FM STEREO SG
FM
SG
3OOo DUMMY TAPE OUT JACK
Figure 13
OSCILLOSCOPE V.T.V.M. DISTORTION METER
FM EXT.
ANTENNA TERIVI|NAL
(3ooo)
Check Stereo Separation at 100,
i k and 10 kHz.
Check
the Stereo
lndicator Sensitivity.
{input:
near
10pV)
Readjust FM MPX Alignment on
page
19.
Check the
FM MPX
circuits.
Stereo Separation
is worse than 22 dB at 100, 27 dB at
10 kHz.
Stereo Separation
is
better
than22 dB
at
100,
27
dB
at
10
kHz.
lkand20dBat
1
kand20dB
at
Adjust value
of
R
167.
Check
FM MPX
circuits.
Stereo
Beacon
Sens.
is worse than 20
pV.
Stereo Beacon Sens.
is
better
than 20pV.
(Nominal
sensitivity:
10pV)
CONNECTION
STEP
1
REPAIR
Proceed
to
Alignment
section.
-16-
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