Tektronix CURVE-TRACER 576 Instruction Manual page 186

Performance Check-Type 576
e. Press the POLARITY INVERT button.
f. CHECK FOR-Highest spot in the display at least 1
division above the center horizontal graticule line (at least
1.5 A).
g. Release the POLARITY INVERT button.
NOTE
For the remainder of this step and for step 4, make
each check with the POLARITY INVERT button
both pressed and released. The display with the
button pressed in each case will be inverted about the
center of the CRT as is illustrated in parts d through g
preceding this note.
h. Set the STEP GENERATOR AMPLITUDE switch to
200 mA.
i. CHECK FOR-Lowest spot in the display at least 2
divisions below the center horizontal graticule line (at least
2A).
j. Set the VERTICAL switch to 10 mA and press the
OPPOSE OFFSET button.
k. CHECK FOR-Highest spot in the display between 1
and 2 divisions above the center horizontal graticule line
(between 10 mA and 20 mA).
I. Set the following Type 576 controls as listed:
VERTICAL
SERIES RESISTORS
STEP GENERATOR AMPLI-
TUDE
OFFSET
2A
65 k
50pA
AID
m. ,CHECK FOR -Spot farthest to the right at least 1
division to the right of the center vertical graticule line (at
least 10 V).
n. Set the HORIZONTAL switch to 1 V and press the
OPPOSE OFFSET button.
o. CHECK FOR-Spot farthest to the left between 1
and 3 divisions to the left of the center vertical graticule
line (between 1 V and 3 V).
A-28
4. Check Step Generator Limits-Voltage Mode
a. Set the following Type 576 controls as listed:
HORIZONTAL
OFFSET
STEP GENERATOR AMPLI-
TUDE
10 V COLLECTOR
AID
2V
b. CHECK FOR-Spot farthest to the right on the
fourth vertical graticule line to the right of center (40 V).
c. Set the HORIZONTAL switch to 20 V and press the
OPPOSE OFFSET button. Turn the HORIZONTAL switch
clockwise and the STEP GENERATOR AMPLITUDE
switch clockwise, together, throughout the voltage range of
the STEP GENERATOR AMPLITUDE switch.
d. CHECK FOR-Spot farthest to left on the first verti-
cal graticule line to the left of center (10 times AMPLI-
TUDE switch setting).
e. Set the following Type 576 controls as listed:
VERTICAL
HORIZONTAL
SERIES RESISTORS
STEP GENERATOR AMPLI-
TUDE
OFFSET
10 mA COLLECTOR
10 V COLLECTOR
3k
2V
AID
f. CHECK FOR-Spot farthest to the right at least 1
division below the center horizontal graticule line (at least
10 mA at 40 V).
g. Set the following Type 576 controls as listed:
VERTICAL
SERIES RESISTORS
2 A COLLECTOR
6.5
h. CHECK FOR-Spot at least 1 division below the
center horizontal graticule line (at least 2 A at 10 V).
i. Set the Type 576 controls as shown in Table 2-9.
j.
CHECK FOR-Spot is between 1 and 2 divisions
below the center horizontal graticule line for each setting of
the CURRENT LIMIT switch (between 1 and 1.5 divisions
for the 2A setting).
ADD AUG 1984
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