Revox C221 User Manual

Service Manual
C221 CD
Player
nÄ/ox
6
Measuring
the audio data
6.1
Required auxiliary
materials
.-
The following auxiliary
materials
are
required:
.
DC voltmeter
.
AC voltmeter
.
Oscilloscope
.
Automatic distortion
meter
(e.9.
Tektronix AA501)
.
Filter for distortion
measurement
.
Frequency response
test
CD
-
"Audio
Signals
Disc
1" from
Philips,
SBC429
.
Drop-out
test
CD
-
"Test
Sample 5A"
from Philips
6.2
Harmonicdistortion
nr
To
measure the
harmonic
distorlion
proceed
as
follows:
r
lnsert the
test
CD
"Audio
Signals
Disc 1".
.
Switch on the
4OO Hz
and 30
kHz filter.
.
Left-hand channel:
Connect the filter to the PHONO socket 26
L.
.
Right-hand channel:
Connect the filter to the INCH socket 26 R.
.
Play track numbers
14 to
23.
i-
The measured distortion of
both channels should
be less
than
0.005%.
6.3 Output
level
Unbalanced
outputs:
{,-
Proceed as follows to measure the
level on the unbalanced
outputs:
o
lnsert the test CD
"Audio
Signals Disc 1".
.
Left-hand channel: Connect the AC voltmeter to the PHONO
socket 26 L.
.
Right-hand channel: Connect the AC voltmeter to the PHONO
socket 26 R.
.
Play track number
1.
(r
The
measured level should be 1.9 V RMS
(!10%).
(.-
The channel balance should be
within
0.05 dB.
41

Revox C221 Specifications

General

Brand	Revox
Model	C221
Category	CD Player
Language	English