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Technics RP-070 - Page 4

Technics RP-070
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MEASUREMENT
AND
ADJUSTMENT
METHOD
NOTE:
|
|
1.
Take
care
that
light
from
the
transmitter
IS
not
ae
4,
The
measurement
should
be
made
at
temperatures
in
a
applied
to
the
receiver.
range
of
5~
35°C
and
humidity
of
45~85%
unless
other-
2.
Do
not
touch
the
set.
|
wise
Specified.
3.
Make
the
measurement
and
adjustment
without
removing
Where
a
delicate
reading
i
IS
needed,
however,
the
tempera-
the
printed
circuit
board
from
the
receiver
or
the
transmit-
ture
and
humidity
specifications
are
to
be
20+2°C
and
ter,
_
(65+5%
respectively.
ITEM
MEASUREMENT
&
ADJUSTMENT
REMARKS
Receiver
sensitivity
adjust-|
1.
Test
equipment
connection
is
shown
below.
ment
Equipment:
«
Transmitter
(RP-070)
*
Receiver
(RP-070)
*
Oscilloscope
or
VI
VM
*
Regulated
DC
power
supply
Transmitter
Receiver
1
(TLR69705-1)
|
3
Oscilloscope
——
ame
ame
eee
oe
—_—aee
=e
ae
ee ee
'
Fig.
10
.
2.
Put
the
transmitter
and
receiver
with
their
light
emitting
and
receiving
sections
facing
each
other
at
a
specific
distance
(10cm).
3.
Switch
on
the
transmitter
and
then
adjust:
the
coil
core
L1
(TLR
69705-1)
of
the
band
pass
filter
circuit
so
that
the
es
voltage
Is
maximum
on
the
VTVM
or
eee.
|
Adjustment
of
transmitter’s|
1.
Test
equipment
connection
iS
shown
below.
inhibition
time
Equipment:
x
Transmitter
(RP-070)
*
Receiver
(RP-070)
*
Memory
scope
or
counter
or
oscilloscope
*
Regulated
DC
power
supply
or
new
battery
VR1028
|
im
Digital
electric
counter
VR1071
~§
VRI1052
Fig.
12

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