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5.8 Recording Level Adjustment
Setting:
M o d e
. . . .
R e c o r d
I n p u t S i g n a l
. . . .
3 3 3 H 2 , - 1 0 d B v ( 3 1 6 m V )
Test tape
. STD-608A
A C m V m e t e r l . . . . . .
T P 1 ( L c h ) a n d T p 2
(Rch) for the DOLBY
NR assembly
AC mV meter 2 . . .. . . TPg (Lch) and Tp4
(Rch) for the DOLBY
NR assembly
Procedure:
1. Adjust the INPUT level control so that the
AC mV meter 1 reads -7.7dBv (412mV).
2. Adjust the VR305 (Lch) and VR306 (Rch) so
that the AC mV
meter 2 reads - 7.7dBv
(412mV)
Fig. 5-14 Recording level adjustment
5.9 Recording/Playback
Frequency Response
Adjustment
Setting:
Mode
M O N I T O R s w i t c h . : : :
Input Signal
Test Tape
AC mV meter
Procedure:
1. Adjust the INPUT level control so that the
AC mV meter reads - 24dBv (61.3mV).
2. Set the MONITOR switch to the TAPE posi-
tion.
3. Record and play back the input signals (333H2
and 10kHz, - 30dBv) onto the STD-608A.
Adjust the VR303 (Lch) and VR304 (Rch)
so that the 10kHz playback level reads 1.0dB
higher than that of 333H2.
4. Record and play back the input signals onto
the STD-603. Adjust the VR301 so that the
lOkHz playback level reads within
+0.5dB
l6 dB at BSBHz.
5. Likewise record and playback the input signals
onto the STD-604. Confirm that the playback
Ievel meet specifications. If the playback level
does not meet the specifications, adjust VR302
on the condition that erase current is within
160t15mA, to meet the specifications.
6. As listed in the specifications in Fig. 5-16
check to see that performance meets specifi-
cations.
Fig. 5-1 5 Recording/Playback
frequency response
adjustment
@
o
@
Record/Playback
SOURCE
333H2,- 30dBv (31.6mV)
10kHz, - 30dBv (31.6mV)
STD-608A, STD-603 and
STD.604
OUTPUT terminals
-7 .7 dgv l412mv I
@ MoNtroR sw
. . . , T A P E
Level = Playback level
A
l o k H z l e v e l - 3 3 3 H 2 l e v e l = * 1 , o d B
B
l 0 k H z l e v e l - 3 3 3 H 2 l e v e l = O . 5 d B r ; , d B
c
S e e F i g . 1 1 - 2 8 .
3 5
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