Tektronix CURVE-TRACER 576 Instruction Manual page 180

Performance Check-Type 576
h. CHECK FOR-rate of step generation increasing
when the NORM RATE button is pressed then increasing
again when the 2X RATE button is pressed.
i. Press the SINGLE STEP FAMILY button. Press it
again.
j. CHECK FOR-One Step family generated each time
the SINGLE STEP FAMILY button is pressed.
7. Check Step Generator and Offset Multiplier
Accuracy
a. Set the following Type 576 controls to:
VERTICAL
DISPLAY OFFSET Selector
HORIZONTAL
STEP GENERATOR
STEP FAMILY
RATE
2A
HORIZ X10
1 V BASE
1
v
REP
NORM
b. Set the Calibration Fixture Step Generator Loads
switch to Step Gen and the Step Generator switch to 1 V.
c. Press the ZERO button and position the spot onto
the center horizontal graticule I in e.
d. Release the ZERO button.
e. CHECK FOR-Spot on the center horizontal graticule
line ±0.1 division ( 1% of 1 volt).
NOTE
The Type 576 vertical, horizontal and display offset
must be calibrated to perform the following checks.
f. Turn the CENTERLINE VALUE switch throughout
its range, two positions at a time.
g. CHECK FOR-A spot in same position horizontally
on the CRT each time the CENTERLINE VALUE switch is
switched two positions ±0.5 division (5% of 1 volt).
h. Set the CENTERLINE VALUE switch to 10.
i. CHECK FOR-Spot on the center vertical line ±2 divi·
sions (±2% of total output).
A-22
j. Press the AID OFFSET button.
k. CHECK FOR-Spot on the center vertical line ±2
divisions (±2%).
I. Turn the OFFSET MUL T control counterclockwise
throughout its range. For each complete revolution of the
OFFSET MULT control, turn the CENTERLINE VALUE
switch clockwise two positions.
m. CHECK FOR-Spot on the center vertical line for
each revolution of the OFFSET MUL T control.
n. Set the Type 576 OFFSET MUL T control to 10.00
and press the OPPOSE OFFSET button.
o. CHECK FOR-Spot on center vertical graticule line
±2 divisions (±2%).
p. Set the following Type 576 controls to:
HORIZONTAL
OFFSET
STEP MULT .1X
q. Repeat parts c through f.
.1 V BASE
ZERO
Pressed
r. CHECK FOR-A spot in the same position horizon·
tally on the CRT each time the CENTERLINE VALUE
switch is switched two positions ±1 division ( 10% of 0.1
volt).
s. Set the CENTERLINE VALUE switch to 10.
t. CHECK FOR-Spot on the center vertical line ±2 divi·
sions ( 2% of total output).
u. Set the following Type 576 controls to:
HORIZONTAL
AMPLITUDE
OFFSET
STEP MULT .1X
STEP FAMILY
200 COLLECTOR
2V
AID
Released
SINGLE
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v. Set the Calibration Fixture Step Generator switch to
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2V.
ADD AUG 1984
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