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Deck settings:
TEAC test tapes:
MONITOR sw.:
TAPE
MTT-150:
For Dolby level calibration
NR SYSTEM sw.: OUT
MTT-316:
For playback frequency response
SPEED sw.:
STANDARD
check for METAL, Co(Cr0,)
5-1 PLAYBACK PERFORMANCE
EQ sw.:
METAL
MTT-216: For playback response check for NORMAL
MEASURING
ADJUST
—_|POINT:
ITEM
SETTING
INPUT SIGNAL,
(or CHECK)
REMARKS
RESULT
Conn.:
Fig. 5-2
OUTPUT:
1, REC/PLAY head
Azimuth nut of | @ Phase: about 0°
azimuth
OUTPUT cont.: convenient
MTT-316 (12.5 kHz)
R-P heads
'on 'scope (Fig. 5-4)
output level position
(Fig, 5-3)
Max. output on
OUTPUT: |
Phase: 45° min.
2. Phase shift
Same as above
MTT-316
Check
(315 Hz)
90° min.
(12.5 kHz)
-
-
TP1/TP2
MTT-150
R11/R21
2.5 dB (581 mV)
Spec. setting of
OUTPUT:
OUTPUT cont.
3. Specified output
zs
MTT-180.
OUTPUT cont, 1° 5 dB (436 mV)
|e Spec. output
level
PEAK LEVEL meter
level
4, PEAK LEVEL meter
-
MTT-150
RIZ/R22
eA
EQ: METAL, Co(CrO,)
Adjust for 10 kHz to-be the
output:
same level as ref. signal
MTT-316
R10/R20
Fig. 5-9
(315 Hz)
5. Frequency response | ~~ - ----~~~~----4~-----------}-------- -- =
OUTPUT:
At 10 kHz,
,
should be 3 dB to 6 d8|
EQ:
NORMAL
MTT-316
Check
higher than measured
in above step.
SPEED: STANDARD and __| Fully-erased tape:
OUTPUT:
HIGH
(Use bulk tape eraser)
{82.48 min. ist0)] Ratio of spec.
6. Signal-to-noise ratio
|EQ: METAL
.
. METAL
.
fe
55 dB min. (HI)
output of
Co(CrO)
. .MTT-5061
Check
48 dB min. (STD)|
—5 dB to noise
NORMAL
)IMTT-501
=
53 aB min, (Ht)
PHONES:
7. Headphone output | conn: Fig, 5-5
MTT-150
Check
~15.8 dB 43 dB
8 ohm load
(89.0 mV to 178 mV)
AC Voltmeter
f=}
0° (IN PHASE)
45°
g0°
180°
Fig. 5-4 Confirming phase relationship
DECK under TEST
PHONES
one
Fig. 5-5 Test setup for headphone check
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