Tektronix CURVE-TRACER 576 Instruction Manual page 138

Performance Check/Calibration-Type 576
h. Set the Type 576 MODE switch to LEAKAGE and
the DISPLAY OFFSET Selector switch to NORM (OFF).
i. Turn the VERTICAL switch throughout its range.
j. CHECK FOR-PER VERT DIV readout coinciding
with settings of the VERTICAL switch, using EMITTER
current units.
k. Set the DISPLAY OFFSET Selector switch to VERT
X10 and turn the VERTICAL switch throughout its range.
I. CHECK FOR-PER VERT DIV readout of 10 times
less than the settings of the VERTICAL switch using
EMITTER current units. (Readout should be blank for 1
nA, 2 nA and 5 nA settings of VERTICAL switch.)
m. Set the DISPLAY OFFSET Selector switch to NORM
(OFF) and turn the HORIZONTAL switch throughout its
range.
n. CHECK FOR-PER HORIZ DIV readout coinciding
with the settings of the HORIZONTAL switch. (The read-
out should always be blank for the STEP GEN position of
the switch.)
o. Set the DISPLAY OFFSET Selector switch to HOR IZ
X10 and turn the HORIZONTAL switch throughout its
range.
p. CHECK FOR-PER HORIZ DIV readout of 10 times
less than the settings of the HORIZONTAL switch.
q. Turn the Type 576 AMPLITUDE switch throughout
its range.
r. CHECK FOR-PER STEP readout coinciding with the
settings of the AMPLITUDE switch.
s. Press the Type 576 STEP MU L T .1 X button and turn
the AMPLITUDE switch throughout its range.
t. CHECK FOR-PER STEP readout 10 times less than
the settings of the AMPLITUDE switch.
u. Set the MODE switch to NORM and release the STEP
MU L T .1 X button.
5-10
NOTE
It is a complex and lengthy process to check all the
possible positions of the VERTICAL and AMPLI-
TUDE switches which will provide a {J OR gm PER
DIV readout. The following procedure checks only
that all the (3 OR gm PER DIV fiber-optics will light
up.
v. Set the VERTICAL and AMPLITUDE switches for
displayed readout as shown in Table 5-5.
w. CHECK FOR-(3 OR gm PER DIV readout coinciding
with the third column of Table 5-5.
x. (If doing check steps only, go to step 15.)
TABLE 5-5
Check {J OR Qm PER DIV Readout
PER VERT PER STEP (3
OR gm
DIV PER DIV
200 f.LA 2V
100f.L
200 f.LA
100mV 2m
200 f.LA
50 nA 4k
500 f.LA
100 nA 5 k
500 f.LA 200 nA 2.5 k
500 f.LA 1 f.LA
500
Control Settings (Partial List)
Type 576
VERTICAL .5A
DISPLAY OFFSET Selector HORIZ X10
DISPLAY AMPLIFIERS
8. Adjust Balance of Horizontal Display
Amplifier
0
a. Set the Type
576
controls as shown in the initial list
of control settings except as noted above.
b. Position the spot to the center of the CRT graticule
using the FINE POSITION controls.
c. Set the DISPLAY OFFSET Selector switch to HORIZ
X1.
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d. Check for the spot on the vertical centerline of
the~
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CRT graticule.
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