Technics RS-615US-D - Specifications

ll. MEASUREMENT CONDITIONS
1. Standard measurement conditions
* Ambient temperature:
* Ambient humidity:
10~30°C (50~86*)
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 1V (f=1kHz) through the
attenuator while keeping the attenuator at OdB.
* When supplying a signal to the tape recorder amplifier, adjust the input level using the attenuator.
Output contro! knob
Resistor 6000.
Vacuum tube
voltmeter
ue frequency /
oscillator a”
f=1kHz
Oscilloscope
va
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.
formance because of self damagenetization due to storage conditions, etc.
Please refer to the tape life specification 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:
* Test tape
PARTS NO.
Not more than 6 months.
PARTS NAME SPECIFICATIONS
Even in such a case when a tape is not used, but stored, for a long period of time, tape shows deterioration in per-
REMARKS
Standard recording jevel and
frequency response tape
0dB
“ i E B B B El H
OdB: STANDARD REC. LEVEL (160pWb/mm)
5 times repetitive recording.
Tape speed: 1-7/8ips. (4.8 cm/s)
Full track (10 min.)
Wow and tape speed tape 3kHz
0dB: 250pWb/mm
Tape speed: 1-7/8ips. (4.8cm/s)
Full track (45 min.)
Azimuth
tape
6.3
kHz
OdB: 250pWb/mm
Tape speed: 1-7/8ips. (4.8 cm/s)
Full track (15 min.)
Reference blank tape (Normal)
Unrecorded tape (20 min.)
Reference blank tape (CrO2)
Unrecorded tape (20 min.)