12 | Keysight | N4917B Optical Receiver Stress Test Solution - Solution Brochure
N4917B Jitter Conformance And Performance Tests
The stressed receiver sensitivity test explained in the IEEE 802.3 standard requires a sweep
of sinusoidal jitter on top of the previously calibrated jitter and the interference stress and
at a specific OMA level. The DUT must meet or exceed the target Bit Error Ratio under these
conditions (1E-12 for LR4/ER4 and 5E-5 for SR4).
The N4917B software provides two jitter measurements. The Jitter conformance tests per the
compliance level in the standard and the optional user selectable margin can be applied to test
at a slightly higher level than the standard requires. The Jitter Performance test allows the user
to find the limits of the jitter tolerance test for more detailed margin testing.
Results of the jitter measurements are shown numerically and graphically. In example below,
the blue line on the plot is the jitter tolerance compliance limit from the IEEE 802.3 standard.
The green dots represent actual test data, at the user selectable margin. The yellow line
indicates the maximum margin limits of the jitter tolerance test.
In these tests the stress level is automatically setup by the N4917B software, using a previously
run calibration and the user enters the BER results manually. This test is most approriate when
the BER can be visually read from the DUT user interface.
Figure 10. Screenshot jitter conformance result
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