Tektronix 576 Instruction Manual page 22

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
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 2A
DISPLAY OFFSET Selector HORIZ X10
HORIZONTAL 1 V BASE
STEP GENERATOR 1V
STEP FAMILY REP
RATE 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 line.
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).
divisions (+2%).
switch clockwise two positions.
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
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 200 COLLECTOR
AMPLITUDE 2V
OFFSET AID
STEP MULT .1X Released
STEP FAMILY SINGLE
v. Set the Calibration Fixture Step Generator switch to