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RDD-20/10
SEP.
1986
AD
J
USTM
ENT
(RDD-20/10)
H8
Set the front
panel switches
and
controls
as
follows
:
;Hr
77
^
>
$
1.
COMPRESSOR
1.
3
>7"U7t
1-1.
Apply
a
50mVp-p,
1kHz,
4-0-4 cycle burst
tone
signal
to
INPUT
jack.
1-2.
Connect
a
scope
to
TP-
1
.
1-3.
Adjust
RT1 (THD)
for
a straight
DC
level.
1-1
I
NPUT
i/
t ;
lKHz,
50mVp-p6D4-
0—4
^
s
'—
7, h
60
1-2
TP-llCt->o7 3-7
0
^t-5
0
1-3
DC
RT
1
(THD
)£fgj
2.
EXPANDER
2
.
2-1.
Apply
a
50mVp-p,
1kHz,
4-0-4 cycle burst
signal
to
INPUT
jack
2-2.
Connect
the
scope
to
TP-2.
2-3.
Adjust
RT2
(THD)
for
a straight
DC
level.
2-1
•
INPUTS
+
-j
^
{C
%
lKHz,
5
OmVp—
pCQ
4
—
0-4
*
h
(f
5
0
2
-2
TP -2
ICd-'>a
^
2-3
DC
RT2
(
THD
)
£
issiiT
-S
o
%
V
'V
\
3.
CLOCK FREQUENCIES
3-1.
Connect
a
frequency counter
or the
scope
to TP-3.
3-2.
Set
FINE
at
xl.O and
adjust
RT4 (CLOCK LOW)
for
40
±
0.5kHz
or
24.7-25.3ps.
3-3.
Set
FINE
at
xO.5 and
adjust
RT3 (CLOCK
HIGH)
for
82.5
±
1
.0kHz
or
1
2.0-1
2.3/ts.
3.
3-1
T
P
-
7
-5>o
3-2
FINE^-XI.OICLT,
40±0.5KHz
(24.7—
25.3/^s)
1C
^
-S^ICRT4(CLOCK LOW)
;
&113llE"T
dE>
o
3-3
FINE£
X0.5ICLT,
82.5±1.0KHz
(12.0—
12.3/^s)IC
££
-S
JiiCRT
3(
CLOCK HIGH)
'SrtSiSIlF
&
o
D
I
F F
F.-R.E
N
CES
BETWEEN
R
n n
-
2
0
AND
R
Tt
n
-
i
n
Rnn-2o>Rpn-i
n
yiiaai
*
The t«o
models
are the same except for those
parts listed
ia
the
table below.
*
c-rt.
PARTS NAME
RDD-20
RDD-10
Top
Cover
2202031900
2202027100
Front Panel
2221078000
2221073800
Button
(POLARITY/LEVEL)
2247064700
12470514
MT
Board
7413551000
(pcb
2292018700)
74123510
(pcb
2292018700)
*
7413551000
is
upword compatible
with
74123510, that
is,
7413551000
can
be used as
a
replacement
for 74123510.
The
reverse does not hold
true.
*
74
1355 1000
(±
74
12351
0<5D±&;i»r?
74123510^0
ftffl
t
L
X
&
.
L&ls
ft*
4
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