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