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DisplayPort Test Implementation Group 21 Agilent J-BERT N4903B & 90000A/X/Q Series Sink Draft2

9.4 Eye Height Calibration

1. Change the pattern on the SSG to the pattern to be used for the testing:

For RBR and HBR: PRBS7

For HBR2: CP2520

Use the procedure in 9.1 to return to the test pattern to be used for testing on the

J-BERT N4903B.

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

450mVdifferential (1.35V divided by 3) to TP3 as in Figure 4-3 [of the PHY1.2b CTS]. For HBR2,

crosstalk aggressors will be applied in 9.4.2 below.

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

138mV (414mV/3).

a. Connect 2ea. Divide by 3 RF power dividers (JFW Model # 50PD-292P) or divide by 4 power

dividers (terminate unused leg) to the TRIGGER/REF-CLK DATA/DATA# and Outputs of the

J-BERT N4903B using 1ea. pair of matched SMA cables.

b. Connect output of power dividers using 3ea. pair of SMA cables to the specified crosstalk

lanes for the DUT.

c. Example: If Lane0 is being tested, the differential crosstalk signals are connected to Lane1,

Lane2, and Lane3.

Figure 17: Crosstalk Connection Setup

d. In the J-BERT N4903B menu go to PG Setup > Trigger/Ref Clock Setup and set Clock

Output Divider to be 4 as shown below for HBR2.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 55 56

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