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5.
Adjusting the Recording Section
(1)
Adjusting
the
record/playback
overall
frequency
response.
(CrO,)
1)
2)
Load the test tape GR-2/60, record a signal with an input
level of —40 dB. 1 kHz at the LINE IN terminal; playback this
recording.
Change the frequency of the input signal to 10 kHz, record
and playback; adjust RT-105 (L ch), RT-205 (R ch) so that
the characteristic standards meet the following diagram
when compared to the 1 kHz signal output level.
(The other TAPE POSITIONS will automatically be adjusted
by finishing of the foregoing adjustments.)
DRW-580
oa
Dolby C Record/Playback
Overall Frequency Response
(db)
:
:
Ect
+5
|
+4
e
:
.
LI
i
4
i
=
:
ameee
ra
1
20
50
100
200
500
(2) Adjusting the record/playback levels (CrO,)
1)
2)
Load a GR-2/60 tape and after having recorded a signal of
1 kHz (—20 dB), play it back.
Adjust RT-103 (L ch) and RT-203 (R ch) so that the output
from the line out terminal has the same value as the output
when monitoring the recording.
(3)
2«
5k
10k
14k
20k
(Hz)
Tape
: GR-2/60
Dolby NR
:Onc
Level
:-20dB From Dolby Level
Checking
the Dolby C record/playback
overall frequency
re-
sponse
1)
Set the DOLBY NR switch to the "C" position.
2)
Using the test tapes GR-2/60, perform record/playback in
the same
manner as 5-(1).
3)
Check to make sure that the record/playback werrall fre-
quency response meets the specifications in thed#agram.
Sk
YOK
14k = 20k (Hz)
Tape
: GR-2/60
Doiby NR
Oft
Level
—20dB From Dolby Level
13
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