Performance Tests
4-64
TDS7104 & TDS7054 Service Manual
d. Set up for statistics measurements:
H Press RUN/STOP button to freeze the display.
H Touch MEAS and select the Time tab to bring up the Time
Measurements menu.
H Touch the Pos Width button.
H Touch Setup Statistics. Touch the Measurement Statistics All button
and then touch Reset to reset the statistics.
H Touch Weight n=. On the keypad press 1000, then ENTER. Touch
Setup.
H Touch Setup Ref Levs and then touch Absolute.
H Touch MidRef. Using the keypad or multipurpose knobs, set the
mid reference to 150 mV. Touch Enter and then Close.
H Press the RUN/S TOP button to start the acquisitions.
H Wait about 30 seconds.
H Press RUN/STOP button to freeze the display.
H Record the all statistics values.
H Calculate the difference of the Maximum (M) minus the mean ().
H Calculate the difference of the mean () minus the Minimum (m).
H Both differences must be less than or equal to the Delta-time
accuracy limit shown in Table 4--9 for your oscilloscope.
H Enter pass/fail result for delta time on the test record.
Table 4- 9: Delta time measurement
Oscilloscope type
Pulse g enerator rise
time range
Delta time accuracy limit
TDS7104 >140 ps <400 ps ≤0.030 ns
TDS7054 >280 ps <800 ps ≤0.060 ns
e. Repeat for all other channels:
H Note the Vertical SCALE setting of the channel just confirmed.
H Press the Vertical channel button for the channel just confirmed to
remove the channel from display.
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