Keysight N4917CPCA Optical Receiver Stress Test for CPRI Fronthaul Networks User Guide
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Using the N4917CPCA Software
4
Fully Automated Jitter Tolerance Testing
Depending on the test setup and DUT capabilities, it is also possible to run
fully automated jitter tolerance measurements using the built-in JTOL
measurement feature within the M8070A or M8070B JBERT System
Software.
Use this test when either:
a
the DUT can be put into a loopback mode and a signal from the lane
under test can be fed back to the BERT Analyzer input, or
b
the DUT can be controlled directly from the M8070A/B software
using the ‘DUT Control Interface’ to read the BER directly from the
DUT internal error checker counters.
The M8070A/B JTOL measurement can also be run as a compliance test
with/without margin or a tolerance test to find the limits of the DUT. It has
several additional features such as a choice of search algorithm, user
definable BER depth, and so on.
Figure 52
Jitter Tolerance Measurement System Results within M8070A software