Agilent Technologies 6000 Series Service Manual page 48

2 Testing Performance
48
3 Set up the oscilloscope:
a Press AutoScale.
b Set the oscilloscope Channel 1 vertical sensitivity to
200 mv/div.
c Set the oscilloscope horizontal sweep speed control to
5 ns/div.
d Adjust the intensity to get a sharp, clear trace.
e Adjust the oscilloscope's trigger level so that the rising
edge of the waveform at the center of the screen is located
where the center horizontal and vertical grid lines cross
(center screen).
f Ensure the horizontal position control is set to
0.0 seconds.
4 Make the measurement.
a Set oscilloscope horizontal sweep speed control to
1 ms/div.
b Set horizontal position control to +1 ms (rotate control
CCW).
c Set the oscilloscope horizontal sweep speed control to
5 ns/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 scale error in ppm.
e Use the date code on the oscilloscope's serial tag to
calculate the number of years since manufacture. Include
any fractional portion of a year.
f Calculate the test limits using the following formula:
TSA Limit: ± (15 + 2 * YrsSinceMfr) ppm
g Record the result and compare it to the limits in the
Performance Test Record (see page 61).
6000 Series Oscilloscopes Service Guide
Date Code:
0747
07 = Year
47 = Week