3-10
Testing Performance
To verify voltage measurement accuracy
To verify voltage measurement accuracy
This test verifies the voltage measurement accuracy. In this test, you will
measure the output of a power supply 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
Table 3-4
Equipment Required to Verify Voltage Measurement Accuracy
Do this procedure first for Channel 1. Then repeat the procedure for Channel 2.
1
Set up the oscilloscope.
a Adjust the channel 1 position knob to place the baseline at 0.5 division from
the bottom of the display.
Equipment Critical Specifications Recommended Model/Part
Power supply 14 mV to 35 Vdc,
0.1 mV resolution
Fluke 5820A or Agilent 3245A
Digital multimeter Better than 0.01% accuracy Agilent 34401A
Cable BNC, Qty 2 Agilent 10503A
Shorting cap BNC Agilent 1250-0774
Adapter BNC (f) to banana (m) Agilent 1251-2277
Adapter BNC tee (m) (f) (f) Agilent 1250-0781
Blocking capacitor Agilent 10240B
service.book Page 10 Wednesday, August 28, 2002 3:25 PM
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