Technical data

52 4000 X-Series Oscilloscopes Service Guide
2 Testing Performance
4 Make the measurement.
a Set oscilloscope horizontal sweep speed control to
1ms/div.
b Set horizontal position control to +1 ms (rotate control
CCW).
c Set the oscilloscope horizontal sweep speed control to
5ns/div.
d Record the number of nanoseconds from where the
rising edge crosses the center horizontal grid line to
the center vertical grid line. The number of
nanoseconds is equivalent to the time base error in
ppm.
Time base accuracy limit: ±10 ppm
e Record the result and compare it to the limits in the
Performance Test Record (see page 61).