Sony TA-2000F - Harmonic-Distortion Measurement; Frequency Response Measurement

Procedure
1. With the equipment connected as shown in
Fig. 3-4, feed a 1kHz to the TUNER input
jack. Adjust the attenuator to obtain a 1 volt
reading on the ac VIVM.
2. Turn the semifixed resistor R701 (R801), see
Fig. 3-3, mounted on the Meter Amplifier/
Headphone Amplifier board to obtaifi a 0
reading on the level meter.
3. Decrease the input signal level 10 dB (20dB),
and then set the METER LEVEL switch to
-10dB (-20dB) position.
4. Confirm that the reading on the level meter
is 0 + 0.5 VU.
5. Confirm that the reading of the meter changes
with variations in attenuator settings.
3-6. RATED OUTPUT MEASUREMENT
Preparation
1. Set the FUNCTION-2 switch to TUNER.
2. Set the BALANCE control fully countérclock-
wise (left-channel calibration) or fully clock-
wise (right-channel calibration).
3. Set the OUTPUT LEVEL switch to 1V.
4. Set the HEADPHONE LEVEL control to maxi-
mum level position.
Procedure
1. With the equipment connected as shown in
Fig. 3-4, feed a 1kHz to the TUNER input
jack. Adjust the attenuator to obtain a 1 volt
reading on the ac VIVM.
2. Each output level should be within the limits
given in Table 3-2.
TABLE 3-2. OUTPUT LEVEL
Outputs Output Level
CENTER OUTPUT 16.0 +1dB
HEADPHONE OUT (open) 16.0 +1 dB
REC OUT
REC/PB OUT -32 +3dB
1 or 4 to ground
see Fig. 3-S.
3-7. HARMONIC-DISTORTION MEASUREMENT
Preparation
Same as described in Procedure 3-3, except the
TONE switch should be set to ON.
Procedure
1. With the equipment connected as shown in
Fig. 3-4, feed in the signal specified in Table
3-3 and then adjust the VOLUME control to
obtain a 1 volt (r.m.s.) output.
2. Measure the harmonic distortion. The har-
monic distortion should be within the limits
given in Table 3-3.
TABLE 3-3. HARMONIC DISTORTION
Input Signal Harmonic
Level and Freq. Distortion
PHONO-1 (HIGH -18dB, 1 kHz | 0.05% or less
LEVEL) or PHONO-2 -8dB, 1 kHz | 0.1% or less
(at 3 vols output)
*MIC 3 dB, 1 kHz | 0.7% or less
(at 3 vols output)
z +
TUNER, AUX-1, 2, 3 en soo a8; 0.03% or less
*Note: In this measurement, adjust the output
level by means of the MIC LEVEL
control.
3-8.
FREQUENCY
RESPONSE
MEASUREMENT
Preparation
Same as Procedure 3-4.
Procedure — Perform this for each input.
1.
With
the
equipment
connected
as
shown
in
Fig.
3-4,
feed
a
1
kHz
signal
to
the
input
jack.
Vary
the
attenuator
to
obtain
a
1
volt
reading
on
the
ac
VIVM.
2.
Check
the
frequency
response
by
varying
the
‘input
signal
frequency
while
keeping
the
os-
cillator’s
output
constant.
Frequency
response
should
be
within
the
limits
as
given
in
Table
3-4.
Pp L-CH ; : REC
i @ OUT
Fig. 3-5. REC/PB (DIN) connector
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