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DisplayPort Test Implementation Group 19 Agilent J-BERT N4903B & 90000A/X/Q Series Sink Draft2

Tables 4-3 and 4-4 of the CTS. The error term is divided by the HF jitter amplitude to

account for effect of the equalization and jitter transfer function at TP3_EQ.

a. For HBR and HBR2, Calculate the required SJ

SWEEP

target value based on the equation above

using the measured values from9.1, 9.2 and 9.3.1.

Figure 13: Table 4-3 and 4-4 from the PHY CTS 1.2b

For this example, the target value for SJ

SWEEP

is calculated as follows:

SWEEP (2MHz)

= 505 * (1 + (.520 – (220+197+101))/100) = 505 * 1.02= 515

SWEEP (10MHz)

= 116 * (1 + (.520 – (220+197+101))/100) = 116 * 1.02= 118

SWEEP (20MHz)

= 104 * (1 + (.520 – ((220+197+101)))/100) = 104 * 1.02= 106

SWEEP (100MHz)

= 110 * (1 + (.520 – ((220+197+101)))/100) = 110 * 1.02 = 112

b. In the J-BERT N4903B Jitter Setup menu, disable all Jitter terms accept PJ 2.

c. Set the frequency for PJ 2 to 10 MHz.

d. Alternate between adjusting the PJ 2 on J-BERT N4903B user interface and pressing the

Single Acquisition Button on the Oscilloscope until the PJ

(d-d)

is calibrated to the following

values.

For RBR

For HBR

For HBR2

Correction factor for SJ

SWEEP

does not apply. Use the equation

below to arrive at the target

value for PJ 2.

Adjust PJ 2 to the new target

value based on the calculations

made above.

Adjust PJ 2 to the new target

value based on the calculations

made above.

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Agilent Technologies DisplayPort Manuale Utente Pagina 19