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Section
III
Figure
3-1
Model
18
21
MAIN
0
TRIGGER
LEVEL
TIME/DIV/
^
2
>
50
20^
5
f
10
SWEEP MODE
NORM
AUTO
SINGLE
o
DELAYED
O
TRIGGER
LEVEL
O
DEWy^(D)V)
INT
AUTO
EXT
EXT410
-
SLOPE
+
%
-
SLOPE
+
ACS
ACE
AC
DC
W#,,,,
ACS
ACF
AC
DC
9<K,-\
OEL-D
\tbig
,ZM/
cVlTPUT
182IA Tine
BASE
AND DELAY GENERATOR
HEWLETT
•
PACKARD
I82IA-
A-
6B
1.
Sweep
Display.
Determines
which
sweep
is
displayed; main, delayed, or combination.
2.
TIME/DIV
(main).
Selects the
time represented
by each horizontal centimeter
when
displaying
the
main
sweep.
3.
VERNIER
(main).
Adjusts time/div
of
main
sweep between
calibrated positions
of
the
Main
TIME/DIV
switch.
4.
Trigger Source
(main).
Selects
source
of
Trig-
ger
Signal
that starts
main
sweep.
5.
EXT
INPUT
(main).
Connector
for
applying an
external trigger
signal.
6.
Trigger Coupling
(main).
Selects type
of trig-
ger
signal coupling.
7.
SLOPE
(main).
Determines which
slope
of
trigger signal
starts
main
sweep.
8.
TRIGGER
LEVEL
(main).
Selects point
on
trigger signal
waveform
that
starts
main
sweep.
9.
SWEEP MODE
(main).
Selects type
of
main
sweep
operation.
10.
RESET
(main).
Arms
circuit
(lamp
lights)
so
that
next trigger
will start
a
single
sweep.
11.
DELAY
(DIV).
Adjusts time
between
start
of
main sweep
and
arming
of
delayed
sweep
circuits.
12.
DEL'D TRIG OUTPUT.
Connector
for
applying
positive trigger
to
external equipment.
Trigger
occurs
when
delayed
sweep
circuit
is
armed.
13.
INTE
NS RATIO.
Adjusts
the intensity differ-
ence between
the
normal main sweep
and
its
intensified section.
Figure
3-1.
Controls and Connectors
3-0
02591-3
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