A
ll
and more about Sharp PC-1500
at
http://www.PC-1500.info
• Recording signal
When
the
contents of
the
start
bit
or
data
bit
is
"O",
four
pulses
of I
.27kHz
are
recorded
in a
time
of
3.J 5ms. When the contents
of
th
e data bit
is
"I
",
eight pulses
of
2.54kHz are recorded in the
tape
in
a time
of
3. l Sms.
Shown below
is
an
example
of
the conents
of
.S
(one byte) is
"O
1 O 1 O 1 1
O".
5 - 6
~:~P
+
~);"'+
$ 4
-+-
S5
+
S6
+
S7
+
"1"
"o"
fl
1"
..
o,.
3-2. Remote circuit
VGG
(
+5
.
8V
)
74nx4
14
PAI
1
~
11
0
port
2
f>1\2
12
3
PA3
11
~
4
PA4
10
9
7
8
M54
5!
6P
St
op
bH
St
op
bit
OFF
ON
REMOTE
REMOTEO
@ REMOTE !
This circuit
is
provided
to
perform automatic control
of
CMT
on/off
action. Signal from the
PC-1500
is
used
to
actua
te
t
he
re
la
y
via
the
1/0
port(LH5810 or LH581 l
).
When
the REMOVE ON/OFF
sw
itch is
in
t
he
OFF
position, the REMOTE 0 circuit shuts
off
and
disables conlrol from the
PC-1
500. Normally, connection is made
to
the REMOTO 0 jack when one
unit
of
CMT
is used and both REMOTE 0 and
REMOTE
I jacks are connected to use two units
of
CMT.
PAI
or
PA
S
Ro
l
av
OFF
ON
9
Do
not sale this PDF
!!!
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