Specifications

11-5
Performance Tests
Introduction
3. Press Preset Level 0 to 100% on the scope. This will automatically move markers 1 and
2 to 10 and 90% levels.
4. Center a falling edge transition on the scope display and expand the timebase to
10 ps⁄ div.
5. On the scope DELTA T menu, switch the markers on and set the START MARKER to
the crossover of the V marker on the 90% level of the falling edge (midway into the
edge noise or jitter). Set the STOP MARKER to the crossover of the V marker at the
10% level (midway into the edge noise or jitter).
6. Read the DELTA T value from the bottom of the scope display. Enter this value of
DATA FALLTIME on the Calibration Data sheet.
Data Jitter
1. Perform the Preliminary setup if this has not already been done.
2. Use the scope timebase delay to view 8 sequential “EYE CROSSOVER”s. Use the
worst jittered eye crossover to perform the remainder of this procedure.
3. Center the eye crossover in the middle of the display. The scope timebase delay shown
at the top of the display should be in the region of l8 ns. It must not be near 16 ns as a
discontinuity in the scope occurs at this value and may cause measuring anomalies.
4. Select the scope MORE followed by HISTOGRAM menu and the SOURCE to
Channel 3.
5. Select VOLTS Histogram and move the WINDOW MARKERS 1 and 2 as shown in
Figure 11-2.
Figure 11-2
6. Press the ACQUIRE key on the scope, set the number of samples to 1000 and then
press the START ACQUIRING key on the scope (the acquisition progress can be
observed at the top right hand side of the scope display as an increasing percentage
value).