Technics RS-646DS-D User Manual

I. MEASUREMENT CONDITIONS
1, Standard measurement conditions
* Ambient temperature: 10~30°C (50~86°F)
* Ambient humidity: 30 ~90% RH
* Power voltage accuracy: 3%
2. Position of tape recorder
* When measuring, place the unit under test in a horizontal position.
3. Oscillator output voltage adjustment
* Connect the equipments as shown in the following and adjust the oscillator output control knob for 1 V (f=1kHz) through the
attenuator while keeping the attenuator at 0 dB.
* When supplying a signal to the tape recorder amplifier, adjust the input level using the attenuator.
Output control knob
Audio frequency oscillator } Attenuator : Vacuum tbe voltmeter Oscilloscope
f=1kHz
Testers
-
Output
voltage
1V
(OdB)
Il. TEST TAPE
Test tape life
The
more
frequently
the
test
tape
is
used,
the
more
the
tape
characteristics
will
deteriorate
(e.g.
lowering
of
recorded
level,
worsening
of
frequency
response
particularly
in
high-frequency
range,
and
an
increase
in
wow
due
to
tape
elongation)
until
measured
values
be-
come
unreliable.
Even
in
such
a
case
when
a
tape
is
not
used,
but
stored,
for
a
long
period
of
time,
tape
shows
deterioration
in
per-
formance because of self damagenetization due to storage conditions, etc.
Please
refer
to
the
tape
life
specitication
and
use
care
not
to
use
a
tape
longer
than
its
rated
life
when
servicing.
Frequence of use: Not more than 20 times for each tape length.
Storage period: Not more than 6 months.
Test tape
PARTS
NO.
PARTS
NAME
SPECIFICATIONS
REMARKS
Standard
recording
level
5
times
repetitive
recording
and
frequency
response
Tape
speed:
1-7/8ips.
(4.8cm/s)
tape
BS
x
Full
track
(10
min.)
OdB: STANDARD REC. LEVEL (160pWb/mm)
Ti d: 1-7/8ips. (4.
Wow
and
tape
speed
tepe
Tape
Speed:
1-7/8os,
(t.Bom/s
OdB: 250pWb/mm
Tape speed: 1-7/8ips. (4.8cm/s)
Azimuth
tape
6.3kHz
Full
track
(15
min)
OdB: 250pWb/mm
Reference blank tape
(Normal)
Unrecorded
tape
(20
min.)
Reference blank tape
(CrO2) Unrecorded tape (20 min.)

Technics RS-646DS-D Specifications

General

Brand	Technics
Model	RS-646DS-D
Category	Cassette Player
Language	English