Agilent Technologies DisplayPort Bedienungsanleitung PDF herunterladen (Seite 40)

Agilent Technologies, Inc.

DisplayPort Test Implementation Group 40 Agilent J-BERT N4903B & 90000A/X/Q Series Sink Draft2

Eye Height Calibration (with and without crosstalk)

1. On the J-BERT N4903B, turn on all Jitter terms on J-BERT N4903B Jitter menu. RJ, PJ 1 (HBR2

only), PJ 2, and SSC.

2. On the J-BERT N4903B, change the pattern back to CP2520 (HBR2) or PRBS7 (HBR and RBR)

from D24.3.

3. If testing HBR or RBR, go to Trigger Amplitude menu on the J-BERT N4903B and set the

Trigger Amplitude to the specified amplitude in the PHY CTS 1.2b.

4. If testing HBR2, set the Trigger Amplitude to Zero. This amplitude will be increased after

establishing the non-crosstalk eye amplitude.

5. On the DSA, select Analysis > Serial Data > Clock Recovery, and return the Clock recovery to

2nd Order PLL.

6. On the DSA, select measurements Eye > Eye Height Measurement and set the measurement to

measure at the 50% UI point.

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

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

9. If testing RBR or HBR, calibrate the Eye Height to the PHY CTS 1.2b target value. See C

appendix for RBR measurements.

10. If testing HBR2, calibrate the Eye Height to the non-crosstalk target value.

Figure 37: HBR2 without Crosstalk Eye Height Calibration

11. If calibrating HBR2; on the J-BERT N4903B, increase the value in the Trigger Amplitude from

zero to a value that yields the target eye height with crosstalk.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 55 56

Keine Kommentare

Agilent Technologies DisplayPort Bedienungsanleitung Seite 40