Performance Tests
4-42
TDS7104 & TDS7054 Service Manual
H Use the keypad to set vertical offset to the setting listed in the table
for the current vertical scale and position settings. The baseline level
may move off screen.
H Set the generator to the level and polarity indicated in the table for
the vertical scale, position, and offset settings you have made. The
DC test level should appear on screen. (If it doesn’t return, the
accuracy check has failed for the current vertical scale, position, and
offset settings of the current channel).
e. Measure the test signal: Press Close.
H Read the measurement results at the measurement statistics
measurement readout. S ee Figure 4--17.
H Record the Mean in the Measurement Mean column of Table 4--6.
Turn on the measurement
called mean and read the
results here.
Figure 4- 17: Measurement of DC gain accur acy
f. Measure second mean:
H Set the generator to the second level and polarity indicated in the
table for the vertical scale, position, and offset settings you have
made. The DC test level should appear on screen. (If it doesn’t, the
accuracy check has failed for the current vertical scale, position, and
offset settings of the current channel).
H Repeat substep e using the current vertical scale, position, offset, and
new generator setting for the second mean.
g. Check against limits:
H Subtract the second measurement mean from the first measurement
mean for the current vertical scale, position, and of fset.
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