Sony TA-2000F - Filter Response Check; Crosstalk Measurement

TABLE 3-4. TONE CONTROL CHECK
Inputs
Controls
Specified
Frequency
Response
BASS +10dB* maximum,
(Turnover Freq. 500Hz) | 2dB step at 100 Hz
TREBLE
(Turnover Freq. 2.5 kHz)
+10 dB* maximum,
2 dB step at 10kHz
BASS +10dB* maximum,
Same as | (Turnover Freq. 250Hz) | 2dB step at 50 Hz
TREBLE +10 dB* maximum,
(Turnover Freq. 5 kHz) 2 dB step at 20kHz
* referred to 1 volt at 1 kHz.
above
3-11.
FILTER
RESPONSE
CHECK
3-12.
CROSSTALK
MEASUREMENT
Preparation
Preparation
1.
Set
all
controls
as
described
in
Procedure
3-3.
1.
Set
all
the
controls
as
described
in
Procedure
.
3-3,
except
set
the
TONE
switch
to
ON
posi-
2.
Set
the
FUNCTION-2
switch
to
TUNER.
Gon
Procedure
2.
Set
the
FUNCTION-2
switch
to
TUNER.
1.
With
th
i
t
ted
hi
i
i
e
equipment
connected
as
shown
in
Proseanne
Fig. 3-3, feed a 1kHz signal to the TUNER
input
jack.
Vary
the
attenuator
to
obtain
a
1.
With
equipment
connected
as
shown
in
Fig.
3-3,
t
volt
reading
on
the
ac
VTVM.
feed
a
1
kHz
signal
to
the
TUNER
input
jack
2. Check the frequency response by operating
the FILTER switch and varying the input
signal frequency. Keep the oscillator’s output
constant. Filter response should be within the
limits given in Table 3-7.
TABLE
3-7.
FILTER
RESPONSE
CHECK
FILTER SW Position Specitinn: Freency
Response
LOW or BOTH * 3+1.5dB at 50Hz
HIGH or BOTH * .3+1dB at 9kHz
* referred to 1 kHz 1 volt output.
(left channel). Vary the attenuator to obtain
a l volt reading on the ac VTVM.
2. Switch the signal to the right-channel input
jack while shorting the left-channel input.
3. Read the residual signal level in the left-channel
output. The 1 volt output-level to residual-
level ratio represents the channel crosstalk. The
left-to-right and right-to-left crosstalk should
be 60 dB or more.