06 | Keysight | N4980A Multi-Instrument BERT Software - Data Sheet
Simplify jitter tolerance measurements
With the optional JTOL extension, the N4980A multi-instrument BERT software can
perform JTOL measurements as simply as it measures BER (the JTOL software
package requires a license for use). As with BER, both single and multi-channel JTOL can
be measured. By running in parallel, multi-lane devices can be characterized much faster
than conventional testing of each lane sequentially.
Measurements can operate in compliance mode, where the stress point at each jitter
frequency is tested according to a specific template and then moved to the next
frequency, or characterization mode, where testing continues until BER failure is
reached.
To provide flexibility in trading off test resolution for test time, the user can select from
the following search algorithms:
– Binary
– Binary + linear up/down
– Linear up/down
– Log up/down
Figure 10. Jitter tolerance measurements
JTOL test limit templates can be saved and recalled, simplifying the set up for the next
test. A simple to use “point and click” template editor allows the user to add or remove
test points with a click of the mouse. With the JTOL template editor, you can create
templates to meet the testing criteria of the most common standards.
Figure 11. Jitter tolerance test limit template
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