44 6000 X-Series Oscilloscopes Service Guide
2 Testing Performance
4 Make the measurement.
a Set oscilloscope horizontal sweep speed control to 2 ms/div.
b Set horizontal position control to +10 ms.
c Set the oscilloscope horizontal sweep speed control to 5 ns/div or 10 ns/div.
d Measure the number of nanoseconds from where the rising edge crosses the
center horizontal grid line to the center vertical grid line. Each ns equals
0.1 ppm of time base error.
Time base accuracy limit: ±1.6 ppm + aging
Aging factors:
• 1 year: ±0.5 ppm
• 2 years: ±0.7 ppm
• 5 years: ±1.5 ppm
• 10 years: ±2.0 ppm
Use the date code on the oscilloscope’s serial tag to calculate the number of
years since manufacture.
e In the Performance Test Record (see page 52), record the time base error in
ppm and whether it is within the specified limit.
Date code:
1347
13 = Year
47 = Week
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