Testing Performance 2
1000 X-Series Oscilloscopes Service Guide 21
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.
1 Press [Save/Recall] > Default/Erase > Factory Default to recall the factory default
setup.
2 Set the probe attenuation to 1:1 on the analog channel you are testing (for
example, [1] > Probe > Probe; then, turn the Entry knob to select 1.00 : 1).
Table 3 DC Vertical Gain Accuracy Test Limits
Test Limits Notes
±3% of full scale (>= 10 mV/div);
±4% of full scale (< 10 mV/div)
• Full scale is defined as 8 mV on the 500 uV/div range.
• Full scale on all other ranges is defined as 8 divisions
times the V/div setting.
Table 4 Equipment Required to Verify DC Vertical Gain Accuracy
Equipment Critical Specifications Recommended Model/Part
Oscilloscope Calibrator 3.5 mV to 70 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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