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Chapter 3: Testing Performance

DC Gain Accuracy Test

Change the Aux Out voltage to -15 mV.

Press the Clear Display key on the scope, wait for the #Avgs value to return to 256 and

then record the DMM voltage reading and the scope V avg reading in the DC Gain Test

section of the Performance Test Record.

Repeat step 7 for the remaining vertical sensitivities for channel 1 shown in the DC

Gain Test section of the Performance Test Record.

Press Default Setup, then turn off channel 1 and turn channel 2 display on.

Set the Aux Out voltage (V

Aux Out

) to +15 mV as follows:

Configure the scope to measure V avg on Channel 2.

a Pull down the Setup menu and select Acquisition. When the Acquisition Setup window

is displayed, enable averaging and set the # of averages to 256.

b Change the vertical sensitivity of channel 2 to 5 mV/div.

c Click the V avg measurement icon on the left side of the screen.

d When the Enter Measurement Info window is displayed, ensure that the Vavg function

is set up as follows and then click OK:

Source = Channel 2

Measurement area = Entire Display

Press the Clear Display key on the scope, wait for the #Avgs value to return to 256 and

then record the DMM voltage reading and the scope V avg reading in the DC Gain Test

section of the Performance Test Record.

Repeat step 12 for the remaining vertical sensitivities for channel 2 in the DC Gain

section of the Performance Test Record.

Repeat steps 9 through 13 for channels 3 and 4.

Record the

mean reading

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 147 148

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