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' | 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.
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
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