No.
Title
Function Recommended Use
25 SLOPE
Selects the slope of the signal that
triggers the sweep.
Provide ability to trigger from
positive-going or negative-going
signals.
26 LEVEL Selects trigger-signal amplitude point. Select actual point of trigger.
27 TRIG'D
Indicator lights when sweep is triggered
in P-P AUTO, NORM, or TV FIELD.
Indicate trigger state.
29 RESET Arms trigger circuit for SQL SWP.
30 HOLDOFF Varies sweep holdoff time 1 0:1 .
Improve ability to trigger from
a
nals.
31 SOURCE
CH 1,CH2, and EXT trigger signals
are selected directly. In VERT MODE,
trigger source is determined by the
VERTICAL MODE switches as follows:
CH 1 : trigger comes from Channel 1
signal. CH 2: trigger comes from
Channel 2 signal. BOTH -ADD and
BOTH CHOP: trigger is algebraic sum
of Channel 1 and Channel 2 signals.
BOTH-ALT: trigger comes from
Channel 1 and Channel 2 on alternate
swee
s.
Select source of signal that is
coupled to the trigger circuit.
32 COUPLING
AC blocks dc components and
attenuates signals below 15 Hz. LF
REJ blocks dc components and
attenuates signals below about 30
kHz. HF REJ blocks dc components
and attenuates signals above about 30
kHz. DC couples all signal
components.
Select how the triggering signal is
coupled to the trigger circuit.
33 EXT INPUT
Connection for Connection for
applying external applying external
signal that can be signal that can be
used as a trigger, used for intensity
modulation.
Trigger from a Provide
source other reference blips
than vertical by intensity
signal. Also modulation from
used for single- independent
shot application. source.
2. Learning the Controls
After turning the power on, let the oscilloscope warm up for a few minutes before starting this
procedure.
• Set instrument controls as follows:
Display
INTENSITY
FOCUS
Midrange
Midrange
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