8. Rotate the CHI VOLTS/DIV CAL (Variable) control
to its fully counterclockwise position. The display should
docroase in vertical amplitude to at least 1.2 divisions or
less. Return CAL (Variable) control to the detent position.
9. To demonstrate operation of the CH2 vertical
system, set Vertical Display Mode to CH2, connect probe
to the CH2 INPUT connector, and perform steps 1 through
8. Check the INVERT function by pulling the PULL IN
VERT knob. The display should be inverted. Return the
INVERT function to its off position.
10. Return the probe to CHI INPUT connector and
Vertical Display to CHI.
Horizontal and Triggering System
Demonstrate the operation of the horizontal and trigger
ing system controls as follows.
1. Adjust the horizontal POSITION control so the dis
play starts at the left vertical graticule line. Observe that the
display begins with a positive pulse.
2. Push the Slope switch to the in position. Observe the
display now starts with a negative pulse. Push in and release
the Slope switch. The display should again be in the positive
position.
3. Rotate the SEC/DIV switch ono or two positions on
either side of the .5 ms position. The display sweep rate
should change accordingly. Reset the SEC/DIV to the .5 ms
position.
4. Rotate the SEC/DIV CAL (Variable) control to its
fully counterclockwise position. The pulse width should
decrease to at least 0.8 divisions or less. Return CAL (Vari
able) to its detent position.
5. Set the SEC/DIV to 1m and pull the X10 MAG knob.
The magnified square wave display pulse width should ex
pand from 1 division to 10 divisions. Return the X 10 MAG
knob to the o ff position.
DIGITAL MULTIMETER DISPLAY
; CAUTION s
The maximum input voltage is * 1000 V (dc *
peak acj between the HI and LO input or be
tween the HI input and chassis The maximum
LO floating voltage is t500 V (dc -t peak ac)
between L 0 and chassis. The DMM may be
damaged by attempting to measure voltage
if the meter is in the k£l FUNCTION mode
o f operation and the applied voltage is in
excess o f ±100 V (dc + peak ac).
20
305 Operators
REV A SEP 1979
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