Leader Electronics Corp. LDC-824 - Page 7

(9)
Set
the
FUNCTION
switch
to
PERIOD.
(10)
Use
the
“MULTY”’
scales,
and
confirm
the
display
as
shown
in
Table
4-2-1.
In
the
case
that
the
displayed
figure
shows
other
than
0
(zero),
oF
when
GATE
indicator
is
lighted,
push
the
reset
switch,
then,
GATE
indicator
disappears
(gate
is
closed),
and
the
display
shows
as
in
Table
4-2-1.
a
ee
a
ce
DO
Table
4-2-1
(11)
In
the
above
6—10
OVER-flow
indicator
always
shows
light
off.
4.3
Input
Connections
Connect
BNC
Connector
of
the
accessory
cable
to
the
input
terminal.
Connect
the
ground
—
negative
side
of
the
clip
to
the
common
of
the
device
under
test.
Connect
the
positive
hot
side
to
the
test
point.
The
input
is
AC
only
(DC
blocked
by
0.1MF
capacitor).
The
maximum
allowable
voltage
of
the
AC
component
of
the
input
signal
depends
on
frequency.
The
values
are
as
follow:
Input
Impedance
IMQ
10Hz
—
400Hz
100Vrms
or
280V
p-p
400Hz
—
100kHz
20Vrms
or
56Vp-p
50
100kHz
—
520MHz
5Vrms
or
14Vp-p
100kHz
—
520MHz
5Vrms
or
14Vp-p
The
maximum
voltage
of
the
DC
component
of
the
input
signal
is
+
100V
DC.
When
the
input
signal
is
not
a
continuous
sine-wave
or
is
modulated,
the
following
values
are
the
maximum
allowable
AC
input
voltages
permitted
in
accordance
with
the
frequency
chart
below.
Input
Impedance
TMQ
10Hz
—
400Hz
250V
p-p
AQ0Hz
—
100kHz
56Vp-p
500
100kHz
—
520MHz
14Vp-p
100kHz
—
520MHz
14Vp-p
CAUTION
NOTE:
Caution
should
be
taken
not
to
get
an
electric
shock
when
connecting
or
removing
the
input
cable.
High
voltage
circuits
and
horizontal
output
pulses
of
flyback
transformers
in
TV-sets
generate
excessive
voltages.
The
LDC-824(S)
could
be
damaged
by
exceeding
input
limitations.
Therefore,
never
make
a
direct
connection
to
these
circuits.
The
input
impedance
of
this
instrument
is
approx.
1MQ
and
shunted
by
approximately
30pF.
The
input
cable
has
a
distributed
capacity
of
approx.
7OpF.
As
the
capacitance
becomes
100p
F
in
total,
it
is
not
recommended
for
such
a
circuit
or
a
device
under
test
as
influenced
by
this
capacitance
to
be
measured.
:
Note:
Do
not
connect
the
input
of
LDC-824(S)
to
a
high
impedance
point
of
the
device
under
test.
The
parallel
effects
of
this
1M2/100pF
combination
affect
the
operation
of
the
circuit
being
tested.