04 | Keysight | N4980A Multi-Instrument BERT Software - Data Sheet

Graphical results

Any BERT can give you measurements in a table of results. The N4980A multi-instrument

BERT software provides more with graphical results which are easier to interpret—allowing

you to quickly gain insight into what is happening in the device under test.

Figure 6. Graphical measurement results.

Strip chart view shows history of instantaneous BER. Device setting or mode changes

which impact bit error performance can be instantly seen in real time, without needing to

analyze a column of numbers.

Figure 7. Bathtub view.

Bathtub view provides a quick visualization of eye opening at various BER confidence

levels. Eye diagrams measured with real time or sampling scopes simply cannot capture

enough data in a reasonable amount of time to accurately provide this information.