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DisplayPort Test Implementation Group 25 Agilent J-BERT N4903B & 90000A/X/Q Series Sink Draft2

Note: Capture a minimum of 1 million unit intervals with the JMD in order to achieve a

repeatable EYE opening measurement. The vertical EYE height shall be measured using

the same methodology as described in B appendix.

Figure 23: J-BERT N4903B HBR2 Eye Height Measurement without Crosstalk

Note: In this example, the measured PJ value is 121mV.

9.4.2 Eye Height Calibration with Crosstalk

1. For HBR2, apply a non-phase aligned crosstalk aggressor signal (D24.3 pattern) with amplitude of

500mVdifferential (1.50V divided by 3) to TP3 as in Figure 4-3. Adjust the amplitude of the crosstalk

aggressor signal until the EYE Height at TP3_EQ is 90mV

diff

a. In the J-BERT N4903B go to PG Setup > Clock/Jitter Output menu.

Figure 24: HBR2 crosstalk Amplitude on the J-BERT N4903B

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