Performance Tests
4-98
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
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 instrument.
H Enter the result for delta time on the test record.
Table 4- 9: Delta time measurement
Instrument type
Pulse generator rise
and fall time range
Delta time accuracy limit
CSA7404B 140 ps -- 400 ps ≤0.030 ns
TDS7704B, CSA7404B, or
TDS7404B
≤150 ps ≤0.015 ns
TDS7254B 160 ps to 200 ps ≤0.015 ns
TDS7154B 160 ps to 240 ps ≤0.015 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.
H Touch MEAS and the Clear to remove the measurement.
H Press the front-panel button that corresponds to the channel you are
to confirm.
H Set vertical SCALE to the setting noted in step e, first bullet.
H Press the Trigger Source button to toggle the source to the channel
selected.
H Move the test hookup to the channel you selected.
H Press RUN/STOP button to start the display.
H Repeat step d.
2. Disconnect all test equipment from the instrument.
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