Keysight Technologies InfiniiVision 2000, Service Manual

Page: 45 / 86

Testing Performance
2
2000/3000 X-Series Oscilloscopes Service Guide 45
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. When testing 2000 X-Series oscilloscopes, also connect a 50 ohm
feedthrough termination between the channel 1 input and 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 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.
Table 15 Equipment Required to Verify Time Base Accuracy
Equipment Critical Specifications Recommended Model/Part
Signal Generator 100 kHz - 1 GHz, 0.01 Hz frequency resolution,
jitter: < 2ps
Keysight N5171B
50
Ω
BNC Cable BNC - BNC, 48” length Keysight 8120-1840
50 Ohm Feedthrough
Termination
50
Ω
BNC (f) to BNC (m), when testing 2000 X-Series
oscilloscopes
Keysight 0960-0301