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

Calibration—7623A/R7623A Service
e. Turn the INTENSITY control on the 7623Ato obtain a 15-volt signal amplitude on the test
oscilloscope.
f. ADJUST—CRTGrid Bias adjustment R1248 (see Figure 5-4) until the trace on the 7623Ajust
disappears.
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 controlfully clockwise.
i. CHECK—Thatthetest oscilloscope display amplitudeis 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 test oscilloscopedisplay amplitude is between 20 and 30 volts less than the
amplitudein step i.
2. Adjust Z-Axis Compensation and Check Drive
a, Set the time-baseunit in the 7623A for a sweeprate of 0.5 microsecond/division.
b, Set the test 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 7623Atraceoff screen vertically.