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SPX1000
SPX1000
1
—5
Distortion
When
a signal of
1
kHz
is
applied to the L
INPUT
(JK101) and
the output
levels at
the
L
OUTPUT
(JK103)
and R
OUTPUT
(JK104)
are
+10
dBm,
the
distortion
shall
be no
more
than
0.03%.
1
—6
Noise
level
When
no
plug
is
connected
to
the
L
INPUT
(JK101), the
noise
levels at
the
L
OUTPUT
(JK103)
and R
OUT-
PUT
(JK104)
shall
be
no
more
than
-72
dBm.
(Use
a
12.7
kHz,
-6
dB/oct
filler.)
1—7
Maximum
output
level
When
a signal of
100Hz
is
applied to
each
of
the L
INPUT
(JK101) and R
INPUT
(JK102),
and
the
level
is
increased
gradually,
the
L
OUTPUT
(JK103) and R
OUTPUT
(JK104)
shall
respectively
output
a signal of
+
18
dBm
with
a distortion of less
than
3%.
1
—8
Channel
separation
In
the condition
of
1—7
above,
turning
off
the
input at the L
INPUT
(JK101)
shall
switch
off
the
output
at
the
L
OUTPUT
(JK103),
and
turning
off
the input
at
the
R
INPUT
(JK102)
shall
switch
off
the output
at
the
R
OUTPUT
(JK104).
When
one
of
the
input signals
is
turned
off,
the
signal
leakage
from
L
CH
R
CH
or
from R
CH
L
CH
shall
be
no
more
than
-50
dBm.
1—9
Muting
circuit
When
the
Power
switch
(SW1)
is
turned
ON,
the output
signals at
the
L
OUTPUT
(JK103) and R
OUTPUT
(JK104)
shall
be
muted
for
3
to
4
seconds.
When
the
Power
switch
(SW1)
is
turned
froni'
ON
to
OFF,
the
muting
shall
be
applied quickly
without
generating
click
noise.
2.
Measuring
Instruments
(1)
When
measuring
distortion,
use
a
80
kHz,
-6
dB/oct
filter.
(2)
When
measuring
noise
level,
use
a
12.7 kHz,
-6
dB/oct
filter.
(3)
The
output
impedance
of
the
oscillator shall
be no
more
than
600
ohms.
(4)
The
input
impedance
of
measuring
instruments
shall
be no
more
than
1
megohm.
19
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