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12.2.1 DOLBY NR LevelAdjustment
Settings
AC mV meter
. . Connect to TP (DOL.L)
and TP (DOL. R)
Input signal
. . . 2kHz,- 30dBv (31.6mV) to
LINE INPUT
T a p e s e l e c t o r . . . . . . .
N O R M
Mode .
.. Record
Fig. 12-7 DOLBY NR level adjustment
Procedure
1. A<ijust the INPUT level control so that the AC
mV meter reads - 22.2dBv (77.6mV).
2. Switch the Dolby NR switch ON.
3. Adjust VR301 so that the meter reads - 17.9
dBv (127mV).
12.2.2
Head Azimuth Adjustment
Settings
AC mV meter
. . Connect to OUTPUT
terrninals
Test tape
STD-341A
(10kHz, - 20dB)
NORM
Playback
.Turn clockwise to maxi-
mum position
Fig. 12-9 Head azimuth adjustment
Procedure
Adjust the azimuth adjustment screw for maxi-
mum AC mV meter reading. (Lock the screws with
screw lock
after completing
the adjustment).
12.2.3
Playback Level Adiustment
Since this adjustment determines the DOLBY
NR level during playback, it should be performed
precisely.
Settings
AC mV meter
. . Connect to TP (DOL. L)
and TP (DOL. R)
Test tape
STD-341A (333H2, 0dB)
T a p e s e l e c t o r . . . . . . .
N O R M
Mode
. .. Playback
Fig. 12-10 Playback level adjustment
Procedure
Adjust VR101 (Lch) and VR201 (Rch) so that
the meter reads - 1.2dBv (0.87V).
T a p e s e l e c t o r . . . . . . .
Mode
V R 1 0 1 a n d V R 2 0 1 . .
T P ( D O L . L )
T P I D O L , R )
2 2 . 2 d 8 ! l 1 1 . 6 m v l
I P { D O L , L )
Fig. 12-8
Head azimuth adiustment
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