Diag margin test

Diags tab contains 2 sets of testing scenarios: Tx Eye and Rx Eye.

The TxEye test collects the transmit eye associated with a specific byte and bit. The eye is measured by running traffic while varying the DRAM VREF and Phy’s TxDq delay settings. The test records how many errors occur at each delay and voltage setting and returns a matrix of encoded error counts.

The RxEye test collects the receive eye associated with a specific byte and bit. The eye is measured by running traffic while varying the Phy’s VREF and RxClkDly delay settings. The test records how many errors occur at each delay and voltage setting and returns a matrix of encoded error counts.

In Chose Test tab, there are 3 dropdown options: Byte/Bit lane to configure the Rx/Tx Eye test and Run Mode, which allows the user to select the test running mode, Quick or Extensive, using different test parameters for each case. Extensive mode increases the number of test iterations and runs the memory tests multiple times for each delay and voltage setting, thus influencing the total execution time. Extensive mode takes significantly more than Quick mode, which uses the default settings. After configuring connection, Start Validation can be performed. After successful run, eye diagram with golden coordinates will be displayed in Result tab.