Agilent Technologies DisplayPort Manual do Utilizador descarregar pdf (Página 38)

Agilent Technologies, Inc.

DisplayPort Test Implementation Group 38 Agilent J-BERT N4903B & 90000A/X/Q Series Sink Draft2

Figure 34: HBR2 Differential TP3-EQ Eye Diagram

RJ and SJ Calibration Scope Setup

1. Select Analysis > Serial Data

2. Select Clock Recovery

3. Change Clock Recovery to Constant Frequency. This removes the CDR’s Jitter Transfer Function

filter from the Jitter measurement.

4. Change the J-BERT N4903B Pattern from CP2520 (HBR2) or PRBS7 (HBR and RBR) to D24.3

pattern (quarter rate clock). This removes DDJ from the measurement.

5. Enable RJ on the Scope J-BERT N4903B and set to a value equivalent to the target value in the

specification.

6. Press the Clear Display button on the scope front panel.

7. Press the Single button on the scope front panel.

8. The DSA will take a few moments to update the eye diagram and measurements.

9. Adjust Random Jitter on J-BERT N4903B until it matches the target value.

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Agilent Technologies DisplayPort Manual do Utilizador Página 38