5.2.4
Coding
and
Outgut
Amnlifier
Set
the
input
selector
to
position
"MPX"
(l
or
2)
and
the
pilot
mode
selector
(8107)
to
"off":
no
SCA
or
auxiliary
signal.
Input
selector
Indication
(8101)
(with
8106
set
to
"MPX”)
Oscillogram
as
in
Fig.
7a
(triggering
with
pilot
tone).
5.}
Adjustments
5.3.1
SuEEly
Vbltages
Adjust
R406
for
+12
V
tSO
mV
at
St402.6/7.
Adjust
R411
for
-12
V
f50
mV
at
St402.l/2
(chassis:
St402.4/5).
5.3.2
AF
Generator
Fit
the
resistors
R181
and
R182
(on
solder
terminals)
according
to
the
desired
frequency
(set
in
factory
to
500
Hz).
Frequency
1
kHz
48.7
kg
15.8
kg
Set
the
input
selector
(8101)
to
position
"L"
or
"R".
Measure
at
test
point
MP109
with
distortion
meter,
voltmeter
and
frequency
counter.
Adjust
R187
for
minimum
distortion
(3
0.1%).
Adjust
R194
for
a
level
of
+6
dEm.
Check
the
frequency:
permissible
deviation:
<
2%
from
nominal
value.
R
38122
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