
Chapter 4: Testing Performance
DC Gain Accuracy Test
62
up as follows and then click OK:
Source = Channel 1
Measurement Area = Entire Display
5
Press the Clear Display key on the scope, wait for the #Avgs value (top left corner of screen)
to return to 256 and then record the scope's mean V avg reading in the Vscope+ column in the
Offset Accuracy Test (50 W) section of the Performance Test Record.
6 Change the DC Supply voltage to -15 mV.
7 Press the Clear Display key on the scope, wait for the #Avgs value to return to 256 and then
Notes
• For all scope readings in this procedure, use the mean value in the Measurements display area at the
bottom of the screen.
• If a question mark is displayed in front of any of the values at the bottom of the screen, press the Clear
Display key on the scope, wait for the #Avgs value to return to 256 and then record the scope reading.
The question mark indicates that the oscilloscope could not make a reliable measurement. Therefore,
any results that contain a question mark should be considered suspect and you should follow the
directions above.
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