Table of Contents
Advertisement
12.2,6 Record/Playback Frequency Response
Adjustment
Settings
AC mV meter
Input signal
Test tape
Tape selector
Mode
Connect to OUTPUT ter-
minals
333H2, - 30dBv (31.6mV)
to LINE INPUT terminals
srD-608A (STD-603,
sTD-604)
NORM
(CrO2, METAL)
Record
Playback Frequency Response
Test tape
STD-341A
Tape selector
NORM
Dolby NR switch
.OFF
NOTE:
Due to "edge effect",
compensate the right channel by
- 0.5d8 at 125H2 and - ldB at 63H2.
Overall Frequency Response
Tast tape
STD-608A
Tape selector
NORM
D O L B Y N R s w i t c h . .
. O F F
Tast tape
STD-608A
Tape selector
NORM
D O L B Y N R s w i t c h . .
. O N
t O t H r
Tast tape
STD-603
Tape selector
CrO2
D O L B Y N R s w i t c h . .
. O F F
333H2
30dBv
( 3 l . O m V )
6 . 3 k H z
JU6V
( 3 l . 6 m V )
B
3k Hz level -333H2 level = +O.5dB
Fig. 12-13 Record/playback
frequency response adjustment
Procedure
1". Adjust the INPUT level control so that the
meter reads 27dBv (4a.6mV).
2. Record the
333H2, - 30dBv and 6.3kHz,
- 30dBv signals, and adjust VR301 (L ch) and
VR302 (R ch) so that the difference in the
playback output signal level with the 333H2
level as the reference level is +9.563.
3. Change the tape selector and DOLBY NR
switch positions (See Fig. 13-10), and check
that the frequency response is satisfactory.
' 2 7 d B v ( 4 4 . 6 m V )
3 d 8
- -
V R 3 0 l ( L c h ) . V R 3 0 2 ( R c h
Hide quick links:
Advertisement
Table of Contents
