Korg Wavestation - Output Noise Level Test; Output Distortion Test

4.
DF88
(
VDF
) TEST
Confirm
the waveform
like
fig.
2 is transmitted
and
it
changes
according
to
the
passing of the
time by
dint
of DF88-
It repeats
the movement as
it
changes
from Sin
Wave
to Saw
Wave
and
becomes
the level
0-
If this test
is N. G.
,
check
DF88
(
MB87727
) and
the circuit
between DF88
and MDE-
If
this test
is O.K., press
MARK/JUMP SW to
proceed
to TEST
4
OUTPUT
NOISE
TEST.
«
TEST 4
:
OUTPUT NOISE
TEST
»
1.
Select the
output
with SKEY1
~
SKEY6
and measure
the noise
level with
a noise
meter.
The following
is the
correspondnce
of each
SKEY to
each output.
SKEY1
SKEY3
SKEY5
Output-1
SKEY2
Output-3
SKEY4
Phone-L
SKEY6
0utput-2
0utput-4
Phone-
R
2-
Confirm
the noise
level
of
each
output is less
than the
regulation.
If
this
test
is O.K.,
press
MARK/
JUMP
SW to proceed
to TEST 5
OUTPUT
DISTORTION
TEST.
OUT-1
less than
-87.0dBm
OUT-2
less than
-87.0dBm
OUT-3
less than
-86.0dBm
OUT-4
less than
-86.0dBm
PH-L
less
than -87.0dBm
PH-R
less
than -87.0dBm
«
TEST
5
:
OUTPUT
DISTORTION
TEST
))
1.
Select
the
output
signal
as well
as TEST
4 and measure the
level and
the
distortion
of
signal.
The
way
to
select
the
signal
is
the same
as TEST
4.
2.
Confirm
that
the
signal
level
of each
output is
within the regulation,
there
is
no
distortion
and
that
the frequency
of each output
signal is
normal.
If
this
test
is
0.
K.
,
press
MARK/ JUMP
SW
to proceed
to TEST 6
KEYBOARD
AFTERTOUCH
TEST.
34