Teac C-3RX - Recording Performance Calibration and DBX Setup

‘| 18, Erase efficiency
RESPONSE IN 4B
14. Record level
. Frequency
response
. Total harmonic
distortion
. Signal-to-noise
ITEM SETTING
Tape: METAL
BIAS, EQ: Co(CrO,)
Tape: MTT-5061
BIAS, EQ: NORMAL
Tape: MTT-501
BIAS, EQ: METAL
Tape: MTT-5072
BIAS, EQ: Co(CrO.)
Tape: MTT-5061
BIAS, EQ: NORMAL
Tape: MTT-501
BIAS, EQ: MTT-5072
INPUT SIGNAL
LINE IN:
(195 mV)
LINE IN:
(195 mV)
LINE.IN:
(195 mV)
LINE IN:
400 Hz/—12 dB
400 Hz/—12 dB
400 Hz/—12 dB
Required signal /
—42 dB (6.15 mV)
Required signal/
—42 dB (6.15 mv)
Required signal/
—42 dB (6.15 mV)
Same as above
BIAS, EQ: METAL
Tape: MTT-5072
. Tape: MTT-5061
Tape: MTT-501
BIAS, EQ: METAL
Tape: MTT-5072 ,
: MTT-5072 ~—‘Ta
BIAS, EQ: Co(CrO,)
BIAS, EQ: NORMAL
LINE IN:
(195 mV)
LINE IN:
(275 mV)
+
no signal
LINE IN:
(275 mV)
1
no signal
LINE IN:
(275 mV)
‘
no signal
® Connection is same as in Fig. 5-1, but engage 1-kHz filter.
©
Record
a
1-kHz
signal.
Rewind
tape
to
midpoint
of
recorded
portion.
Record
a
‘‘no
signal’
portion.
Find
the
difference
between
the
1-kHz
portion
and
the
“‘no-signal’’
portion.
LINE IN:
1 kHz/+1 dB
(0.869 v)
no signal
S: METAL EQ, BIAS: Co (CrO2)
: MTT-5061
J
4
——
FREQUENCY IN Hz
Fig. 5-7 Overall! frequency response
[METAL, Co(CrO,)]
400 Hz/—12 dB
1 kHz/-9 dB
1 kHz/-9 dB
1 kHz/—9 dB
MEASURING
POINT:
ADJUST
(or CHECK)
OUTPUT:
OUTPUT:
OUTPUT:
OUTPUT:
OUTPUT: -
Fig. 5-7
OUTPUT:
Fig. 5-8
OUTPUT:
OUTPUT:
OUTPUT:
OUTPUT:
45 dB min.
OUTPUT:
65 dB min. ratio
RESULT
—8 dB (308 mV)
—8 dB (308 mv)
—8 dB (308 mV)
2% or less distortion
EQ, BIAS: NORMAL
Tape:
Ratio of spec--
ified output of
—5 dB to noise
Ref. output
level:
+5 dB (1.38V)
MTT-501
3.5 6 00125 400 Ik
7 FREQUENCY IN Hz.
Fig. 5-8 Overall frequency response
[NORMAL]
Ok Kk
11