Adjust Z-Axis Compensation And Check Drive - Tektronix 7623A Instruction Manual

Calibration-7623AIR7623A Service
e. Turn the INTENSITY control on the 7623A t o obtain a 15-volt signal amplitude on the test
oscilloscope.
f. ADJUST-CRT Grid Bias adjustment R1248 (see Figure 5-4) until the trace on the 7623A just
disappears.
I
Figure 5-4. Location of adjustments in High-Voltage cover.
g. Set the time-base unit for a sweep rate of 50 milliseconds/division
h. Position the trace vertically off screen and turn the INTENSITY control fully clockwise
i. CHECK-That the
t e s t
oscilloscope display amplitude is 58 volts or greater. Note this reading.
j. Set the time-base unit for a sweep rate of 0.1 second/division
k. CHECK-That the
t e s t oscilloscope display amplitude is between 20 and 30 volts less than the
amplitude in step i.
2. Adjust 2-Axis Compensation and Check Drive
a. Set the time-base unit in the 7623A for a sweep rate of 0.5 microsecond/division.
b. Set the
t e s t
oscilloscope for 0.5 volt/division (five volts/division at 10X probe tip)
vertical deflection with dc coupling and for
a
sweep rate of 0.2 microsecond/division.
c. Position the 7623A trace off screen vertically.
REV. B, JUNE, 1976