Tektronix TDS6404, Service Manual

Page: 118 / 252

Performance Tests
4- 62
TDS6000 Series Service Manual
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 Positive 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 and then touch Absolute .
H
Touch MidRef . Using the keypad or multipurpose knobs, set the
mid reference to 150 mV . Touch Close .
H
Press the RUN/STOP 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 (
)
of
the statistics values.
H
Calculate the difference of the mean ( ) minus the Minimum (m) of
the statistics values.
H
Both differences must be less than or equal to the Delta-time
accuracy limit shown in Table 4--7 for your oscilloscope.
H
Enter the result for delta time on the test record.
Table 4- 7: Delta time measurement
Oscilloscope type
Pulse generator rise
time range
Delta time accuracy limit
TDS6404 140 ps -- 400 ps
≤
0.030 ns
TDS6604
≤
150 ps
≤
0.015 ns
TDS6404
≤
150 ps
≤
0.015 ns
e. Repeat for all other channels:
H
Note the vertical scale setting of the channel just confirmed.