Performance CheckICalibration-314 Service
2.
Check DC Triggering Range
a. Switch CH 1 VOLTWDIV to .5 V, TRIGGERING
Coupling to DC (AC and AC LF REJ buttons in), and
Source to INT.
b. Connect Function Generator, set to 1 kHz
sinewave, through 50-ohm cable and 50-ohm termination
to CH
1
VERT INPUT connector. Set Function Generator
amplitude for 4 divisions of display.
c. Switch SLOPEto
+
and rotateTRIGGERING LEVEL
control fully counterclockwise. Turn LEVEL control slow-
ly clockwise and note level (on graticule) at which sweep
triggers.
d.
Continue to turn LEVEL control clockwise to the
point at which sweep is not triggered. Note level on
graticule.
e. CHECK-for at least 1.7 volts (3.4 divisions)
between points noted in parts c and d. Note that triggering
occurs on positive slope of sinewave.
f.
Switch SLOPE to
-
g. CHECK-for at least 1.7 volts (3.4 divisions)
between points at which sweep triggers, as in parts c and
d. Note that triggering occurs on negative slope of
sinewave.
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