8. Rotate the C H I V O LT S /D IV C AL (Variable) control
to its fu lly counterclockwise position. The display should
docroase in vertical amplitude to at least 1.2 divisions or
less. Return C AL (Variable) control to the detent position.
9. To demonstrate operation o f 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 IN VERT function by pulling the PULL IN
VERT knob. The display should be inverted. Return the
IN VERT function to its o ff position.
10. Return the probe to CHI INPUT connector and
Vertical Display to C H I.
Horizontal and Triggering System
Demonstrate the operation o f the horizontal and trigger
ing system controls as follows.
1. Adjust the horizontal POSITION control so the dis
play starts at the le ft vertical graticule line. Observe that the
display begins w ith a positive pulse.
2. Push the Slope switch to the in position. Observe the
display now starts w ith 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 tw o positions on
either side o f 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 C AL (Variable) control to its
fu lly counterclockwise position. The pulse w id th 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 w id th should ex
pand from 1 division to 10 divisions. Return the X 10 MAG
knob to the o ff position.
D IG ITA L MULTIMETER DISPLAY
;
C A U T I O N
s
The maximum in p u t voltage is
*
1000 V (dc *
peak acj between the H I and LO in p u t o r be
tween the H I in p u t and chassis The maximum
LO floating voltage is t5 0 0 V (dc -t peak ac)
between L 0 and chassis. The D M M may be
damaged b y attem pting to measure voltage
i f 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