Agilent Technologies DisplayPort Manual de usuario descargar pdf (Pagina 12)

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DisplayPort Test Implementation Group 12 Agilent J-BERT N4903B & 90000A/X/Q Series Sink Draft2

fine-tuned by using a channel with more loss and applied de-emphasis, see E appendix.

Note: The above table is an example of a HW setup that provides adequate ISI for the

setup used during development of this MOI. The actual ISI calibration results may vary

depending on J20, cables and adapters used. It is up to the user to ensure that the ISI

values in the PHY CTS 1.2b for ISI are achieved and measured. You should make sure to

capture the screenshot of the ISI you calibrate to and keep it with your test results for

future reference. It is not required to use the J20 module. Any other combination of ISI

traces and/or cables can be used as long as the ISI is within target limits.

2. Using the test pattern (PRBS7 for HBR CP2520 for HBR2), verify that the ISI measured at TP3_EQ

is equal to the ISI value in Table 4-3 of the PHY1.2B CTS for HBR and Table 4-4 of the PHY1.2B

CTS for HBR2. The JMD’s clock recovery shall be set to the second order clock recovery function

described in Section 2.1 for this step. For RBR, use PRBS7 and calibrate ISI at TP3 without

equalizer.

For RBR

For HBR

For HBR2

In the J-BERT N4903B PG > Bit

Rate Setup Menu:

Select 1.620 Gb/s (DP-RBR)

In Pattern > Select Menu

Select 2^n – 1, and Select 2^7-1

(PRBS7)

In PG Data Output Menu:

Set V

ampl

to 1V

diff

Turn on the PG Data Outputs

See C appendix for detailed

procedure.

Repeat measurement at least 5

times and average the results.

Verify ISI to be 570mUI +/-5%.

In the J-BERT N4903B PG > Bit

Rate Setup Menu:

Select 2.7 Gb/s (DP-HBR)

In Pattern > Select Menu

Select 2^n – 1, and Select 2^7-1

(PRBS7)

In PG Data Output Menu:

Set V

ampl

to 600mV

diff

Turn on the PG Data Outputs

Use Equalizer, Serial Data and

EZJIT wizards to make ISI

measurement on oscilloscope.

See Appendix B for detailed

procedure.

Repeat measurement at least 5

times and average the results.

Verify ISI to be 161mUI +/-5%.

In the J-BERT N4903B PG >

Bit Rate Setup Menu:

Select 5.4 Gb/s (DP- HBR2)

In Pattern > Select Menu

Select User Pattern from File.

Select Browse

Select Pattern

C:\N4903B\Pattern\Demo

\DisplayPort\HBR2_SR-CP-

CP-

SR248_CompEyePattern.ptrn

(AKA CP2520)

Press OK

Press Apply

Press OK

In PG Data Output Menu:

Set V

ampl

to 1V

diff

Turn on the PG Data Outputs

Use Equalizer, Serial Data and

EZJIT wizards to make ISI

measurement on oscilloscope.

See Appendix B for detailed

procedure.

Repeat measurement at least 5

times and average the results.

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