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External Trigger - Tektronix 7B10 Instruction Manual

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Operating
Instructions
-7B10
TRIGGERING
LEVEL
Control-
-Selects
a
point
on
the
trigger signal
where
triggerirrg
occurs.
SLOPE
Switch
-Permits
sweep
to
be
triggered
on
ttegative or
positive-going portions of the
trigger
signal.
READY
Indicator- Illuminates
when
sweep
circuit
is
armed (SINGLE
SWP
Mode).
TRIC'D
Indicator—
Illuminates
when
the display
is
triggered.
MODE
Pushbuttons
Selects the operating
mode
of the triggering
circuit.
COUPLING
Pushbuttons—
Selects the
method
of
coupling the
trigger signal to triggering
circuit.
SOURCE
Pushbuttons—
Selects
source
of the
trigger signal.
SWEEP
POSITION
Control-'
Provides
horizontal positioning.
FINE
Control -Provides
precise horizontal positioning.
MAG
Pushbutton
-
Selects
magnified
X10
or
unmagnHied
sweep.
HOLD
OFF
Control—
Permits hold
off
period to
be
varied to
improve
trigger
stability
on
repetitive
complex
waveforms.
TIME/OIV
Selector- Selects the
sweep
rate of
the
sweep
ger>erator.
VARIABLE
Control
and
CAL
Switch
-Selects
calibrated or uncalibrated
sweep
rates.
Ur>calibrated
sweep
rates
can
be continuously reduced
to
at least
the
sweep
rate of
the next slower
position.
SWP
CAL
Adjustment- -Compensates
for
basic timing char>ges
due
to the differer>ces
in
sensitivity
of
mainframes.
EXTERNAL TRIGGER
INPUT
EXT TRIG
Button
Selects input
impedance.
EXT TRIG
IN
Connector—
Connector
(BNC
type)
provides input
for
external
trigger signals.
Fig.
2-1
(cont.).
Front-panel
controls,
connectors,
and
indicators.
(S
2-3

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