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12.2.4 Playback Equalization Check
Settings
AC mV meter
Test tape
Tape selector . .
Mode
Connect to OUTPUT ter-
minals
STD-341A (333H2,
-20dB) (6.4kH2, -20dB)
NORM
Playback
J3
6 3 k H z l e v e r
3 3 3 H 2 e v e l
+ 1 5 ,
6 3 k H 2 r e v e
3 3 3 H 2 l e v e l
2 . 5 r l d
Fig. 12-1O Playback equalization
check
Procedure
1. Play the 333H2, -20d8 portion and record the
AC mV meter reading.
2. Then play the 6.3kHz, -2OdB portion, and
check that the meter reading lies within +1.5
t2dB of the reading obtained in step 1 above.
3. Switch the tape selector to METAL, play the
333H2, - 20dB portion again, and record the
meter reading.
4. Then play the 6.3kHz, -20dB portion again,
and check that the meter reading lies within
-2.5t1dB
of the reading obtained in step 3.
12.2.5 Level Meter Check
Settings
AC mV meter
Input signal
Mode
Connect to DOL L (L ch)
and DOL R (R ch)
333H2, - 10dBv (316mV)
to INPUT terminals
Record
t-sro-ts
--l
O @ l r * , - r o e I
o @ F * - m l
33&z
ltuBv
( 3 l 5 m V l
FiS. 12-11 Level meter check
Procedure
Adjust the INPUT level control so that the
meter reads - 5.2dBv (0.54V), and check that
the level meter segments light up in a 0dB11 seg-
ment range.
@ @
o o
TL
D O L L l L c h )
D O L R ( R c h )
34
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