24 5000 Series Oscilloscopes Service Guide
2 Testing Performance
To verify voltage measurement accuracy
This test verifies the accuracy of the analog channel voltage
measurement for each channel (DC Vertical Gain Accuracy and
Dual Cursor Accuracy specifications). In this test, you will
measure the dc voltage output of an oscilloscope calibrator
using dual cursors on the oscilloscope, and compare the results
with the multimeter reading.
Test limits: ±2.0% of full scale ±1 LSB*
• Full scale is defined as 32 mV on the 2 mV/div range.
• Full scale on all other ranges is defined as 8 divisions times
the V/div setting.
*1 LSB = 0.4% of full scale
1 Set up the oscilloscope.
a Adjust the channel 1 position knob to place the baseline at
0.5 major division from the bottom of the display.
b Set the Volts/Div setting to the value in the first line in
Table 4.
Tab le 3 Equipment Required to Verify Voltage Measurement Accuracy
Equipment Critical Specifications Recommended
Model/Part Qty
Oscilloscope Calibrator 14 mV to 35 Vdc, 0.1 V resolution, 25 MHz - 500 MHz
sine wave, stability 5 ppm after 1/2 hour
Fluke 5820A 1
Digital multimeter Better than 0.01% accuracy Agilent 34401A 1
Cable BNC Agilent 10503A 2
Shorting cap BNC Agilent 1250-0774 1
Adapter BNC (f) to banana (m) Agilent 1251-2277 1
Adapter BNC Tee (m) (f) (f) Agilent 1250-0781 1
Blocking capacitor Agilent 10240-60001 1
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