30 2000/3000 X-Series Oscilloscopes Service Guide
2 Testing Performance
Record (see page 53). Be sure to set the thresholds with the User softkey for the
appropriate set of channels.
To verify DC vertical gain accuracy
This test verifies the accuracy of the analog channel DC vertical gain for each
channel.
In this test, you will measure the dc voltage output of an oscilloscope calibrator
using the oscilloscope’s Average - Full Screen voltage measurement and compare
the results with the multimeter reading.
Table 6 DC Vertical Gain Accuracy Test Limits
Models Test Limits Notes
2000 X-Series ±3% of full scale (>= 10 mV/div);
±4% of full scale (< 10 mV/div)
• Full scale is defined as 32 mV on the 2 mV/div range
and the 1 mV/div range.
• Full scale on all other ranges is defined as 8 divisions
times the V/div setting.
3000 X-Series ±2.0% of full scale
Table 7 Equipment Required to Verify DC Vertical Gain Accuracy
Equipment Critical Specifications Recommended Model/Part
Oscilloscope Calibrator 14 mV to 35 Vdc,
0.1 V resolution
Fluke 5820A
Digital multimeter Better than 0.01% accuracy Keysight 34401A
Cable BNC, Qty 2 Keysight 10503A
Shorting cap BNC Keysight 1250-0774
Adapter BNC (f) to banana (m) Keysight 1251-2277
Adapter BNC tee (m) (f) (f) Keysight 1250-0781 or Pomona
3285
Blocking capacitor Keysight 11742A +
Pomona 4288 +
Pomona 5088
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