Marantz SUPERSCOPE CD-320 - 5 B-19 Record-Playback Frequency Response Measurement; 5 B-20 Erasing Effect Measurement

cD-320
5A-19
Rtcord-PlâYback
Fr.quoncY
R6pont.
Môt uro'
SEI UP
1. Power
vottage:
Only
wh€n the
6 V DC
pow€r
voltaæ h
primâry
for
the
unit and
this
power
voltâge
it unâvâilabl€.
use AC
power
suPplv
2. Input:
I kHz,
-60
dB signal
wirh 20 dB as
0 VU
3.
Playbâck output
level: Sam€
âs the
recorded sig'
4.
Load:
lvêasuring
instrument inPut
impedânce
5.
Mearuring
ouiput teminal:
LINE Ourput
6. Cassette
tap€ uted:
TDK
AC_211, AC-511
and
soNY cs-30
PSOCEDUNES
L Record the
1 kHz
riqnâl
in
lhe
normal recording
statê.
In turn,
reduce the
input
lev€l bv 20 dB
with an attenuâÎor.
Then,
recor-d the
1 kHz,40
Hz,
t0
kHz, l3 kHz,
14 kHz and
l5 kHz sisnals.
2. Play the
reco.ded
1 kHz
signâl bâck i. thê
normal
3. Let the
I kHz,
20 dB-down
signal
level be 0 dB
as
relêrence
level. Read dilference
of the
40 H2,
10 lHz, 13
kHz, 14 kHr and
15 kH2.ignâl
output
levels from
the I kH2
signal0 dB
reference
l€v€|.
4. Proce€d
lor the
NORMAL, CrO,
and
Fe-Cr
poti-
rions
each
in
the
s€me
manner.
5.
P.oceed both
for the
right ând
lêlt channeh
in
the
sâme
manner.
srat{0aR0s
l. NORMAL
position:
40 Hz
_
l0 kHz
.
+4,
-6
dB
with DOLBY switch
aI OFF
2. CrO:
posit'on:
40 Hz
-
l2-5 kHz
.
- +4,
-6
dB
wilh DOLBY
switch
ât OFF
40Hz-
l2.5kHz
..
+4,-6dB
wiû DOLSY
switch
ât OFF
4. NORIVIAL
CrOl
and Fe_Cr
positions:
40 Hz'-
12.5 kHz
+5,
-7
dB
with DOLBY
twitch
at ON
58-20
Er$ing
Etlêct M.aturâîunl
SET
U?
1. Power voltage:
Only
when the 6
V DC
power
voltag€ is
primaty
lor the unit and
thit
porer
vottâge
is
unavâilâble,
us€
AC
power
supplY.
2. Input:
100 Hz, 60 dB
signâl
with
+10
dB at
0
vu.
Sante as
the recorded
sig.
4. Loâd:
Meâsuring
inttrumenl
input impedance
5.
TAPÉ selector
switch
positionr
NORMAL,
CrO,
6. Câsrette
tape used:
TDK AC2l1,
Ac_stl and
soNY
cs'30
7. Fiher
used: 100
Hz b3nd'Pass
liher
PEOCEOURES
IÙ Record the
l0O Hz
inpui signal
in the norm.l
2. In turn,
increas€ th€
input level bY l0dB
with the
attenuôtor,
and
record
it
3.
Fêwind a
half
ponion
ol lhê
l0 dB_up
râpe ând
record in
no-.ignal state, or
erat€, on
the
portion
wrth the
inpur signal disconnected
lrom lhe
mic.o_
4. Play back
in the
normal
plavback
sÎâæ the
input
rignal
recorded
in rhe norm.l
.ècording state
5.
In rurn,
lel
the
10 d8-up
recorded tign.l
l€vel
be
0 d8 as
relerence
level. Read difference
of thë
level ât the
eràsed
po.tion
fiom the
0 dB referenc€
srar{0a80
Greâter
than 55
dB.
uli
r.:-1
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