Technical data

Testing Performance 2
4000 X-Series Oscilloscopes Service Guide 51
To verify time base accuracy
This test verifies the accuracy of the time base. In this test
you will measure the absolute error of the time base
oscillator and compare the results to the specification.
1 Set up the signal generator.
a Set the output to 10 MHz, approximately 1 V
pp
sine
wave.
2 Connect the output of the signal generator to oscilloscope
channel 1 using the BNC cable.
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
5ns/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.
Table 13 Equipment Required to Verify Time Base Accuracy
Equipment Critical Specifications
Recommended
Model/Part
Signal Generator 100 kHz - 1.5 GHz, 0.01 Hz
frequency resolution,
jitter: < 2ps
Agilent N5181A with
3GHz option
Cable BNC, 3 feet Agilent 10503A