3-130
V
ARI
*L
ITE®
-
VL2B
AND
VL2C
S
POT
L
UMINAIRE
S
ERVICE
M
ANUAL
CONFIDENTIAL
02.9631.0010
15 Jan 98
Step 9.
Verify that luminaire head and yoke are away from stops.
Step 10.
Set up oscilloscope. See Figure 3-46 for location of controls
and indicators for Tektronix oscilloscope models 2205 and
2225. For other model oscilloscope, locations of controls and
indicators are similar to those of these two models. Numbers in
parentheses indicate Figure 3-46 control and indicator
reference numbers.
a. Attach 10X probe to CH1 input (7).
b. Position MODE CH 1 BOTH CH 2 switch (3) to CH 1.
c. Position CH 1 AC GND DC switch (6) to GND.
d. Position CH 1 VOLTS/DIV knob (4) to 0.5 volts at 10X
PROBE scale.
1. For model 2205 oscilloscope turn VAR knob (5)
located on CH 1 VOLTS/DIV knob to fully clockwise
position.
2. For model 2225 oscilloscope turn CAL knob (15)
located on CH 1 VOLTS/DIV knob to fully clockwise
position.
e. Position SEC/DIV knob (10) to 5 ms. Turn CAL knob (11)
located on SEC/DIV knob to fully clockwise position.
f.
Position MAG switch (9) to X1.
g. Turn LEVEL knob (12) to fully counterclockwise position.
h. For model 2225 oscilloscope model only, turn HOLDOFF
knob (18) to fully counterclockwise position.
i.
Position left TRIGGER SOURCE switch (13) to CH1.
j.
Position right TRIGGER SOURCE switch (14) to LINE.
k. For model 2225 oscilloscope model only, position
COUPLING switch (19) to DC.
l.
Press in POWER button (1) to apply power. Allow unit to
warm up for 5 minutes.
m. Adjust CH1 VERTICAL POSITION knob (2) and align
trace to horizontal centerline of display to set zero voltage
reference for display.
n. Adjust HORIZONTAL POSITION knob and align trace so
that it stretches fully across width of display. For model
2225 oscilloscope, use COARSE adjustment knob (16) first,
then use FINE adjustment knob (17).
o. Position CH1 AC GND DC switch (6) to DC.