3.
Maintenance
3.1
Routine
Maintenance
______..____———————-——-————
Regular
maintenance
is
not
required.
However,
it
is
recommended
that
the
unit
be
checked
occasionally
against
the
specifications
according
to
section
3.2.
3.2
Checking
the
Rated
Specifications
3.2.1
Reguired
Measuring
Eguiggent
DC
voltmeter
AF
voltmeter
10
Hz
to
100
kHz
SUN
2/U
—70
to
+12.5
dEm
Bin
>
1
k9
AF
generator
10
Hz
to
100
kHz
+12.5
dEm,
max.
Rout
< 30
Q
Oscilloscope
bandwidth
>
10
MHZ
TEKTRONIX
high
overload
capability
for
measurements
of
cross-
talk
in
multiplex
signal
AF
analyzer
or
bandwidth
<
100
Hz
FAT
2
selective
AF
volt—
sensitivity
better
than
meter
—70
dBn
Stereodecoder
MSDC
2
Psophometer
(contained
in
SUN
2/U)
Distortion
meter
e.g.
LEA
or
HP
5.2.2
Measurements
Refer
to
the
data
sheet
for
the
required
results.
Checking
the
amolifier
characteristics
Apply
a
signal
to
the
L
and
R
inputs
(EulO
and
EuEO)
at
f
=
30
Hz
to
15
kHz
and
with
the
specified
input
levels.
Measure
at
the
decoder
outputs
(DEC.),
the
MPX
output
(Bu40)
and
the
M
output
(EujO)
by
means
of
an
AF
voltmeter
and
the
panel
meter
(J10).
R
38122
-
l4
