Operating instructions

TRIGGERING
LEVEL Control-Selects a point on the
trigger signal where triggering occurs .
SLOPE Switch-Permits sweep to be triggered on negative or positive-going portions of the trigger signal
.
READY Indicator-Illuminates when sweep circuit
is armed (SINGLE SWEEP Mode)
.
TRIG'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
.
POSITION Control-Provides horizontal positioning .
FINE Control-Provides precise horizontal
positioning .
SWEEP
MAG Pushbutton-Selects magnified X10 or
unmagnified sweep .
TIME/DIV Selector-Selects the sweep rate of the sweep
generator .
EXTERNAL TRIGGER INPUT
EXT
TRIG ATTENUATOR-Selects
attenuation factor for external trigger signals .
EXT TRIG IN Connector-Connector (BNC type) provides input
for external trigger signals .
Fig . 1-2 .
Front-panel controls, connectors, and indicators (coat .) .
Operating Instructions-7B80
HOLD OFF Control-Permits hold off period to be varied to improve trigger
stability
on
repetitive complex waveforms .
VARIABLE Control and CAL Switch-Selects calibrated or uncalibrated sweep rates . Uncalibrated sweep rates can
be
continuously reduced to at least the sweep rate of the next slower position .
SWP CAL Adjustment-Compensates
for
basic
timing changes due to the differences in sensitivity of mainframes
1958-4