Teledyne-lecroy QPHY-DDR3 Instrukcja Użytkownika Pobierz pdf (Strona 29)

QPHY-DDR3 Software Option

917717 Rev C 29

• tIH (base + derated)

• tIPW

7) CKdiff-DQse-DQSp-DQsn (4 probes test, each DQS signal probed single ended)

• VSEH(ac)

• VSEL(ac)

• VIX(ac)

• AC Overshoot Peak Amplitude

• AC Overshoot Area above VDDQ

• AC Undershoot Peak Amplitude

• AC Undershoot Area below VSSQ

• SlewR

• SlewF

8) CKp-CKn-DQse-DQSdiff (4 probe test, each CK signal is probed single ended)

• VSEH(ac)

• VSEL(ac)

• AC Overshoot Peak Amplitude

• AC Overshoot Area above VDDQ

• AC Undershoot Peak Amplitude

• AC Undershoot Area below VSSQ

• SlewR

• SlewF

9) Vref tests

• Vref(dc)

D1) Demo of All Tests

This configuration uses the saved waveforms found in the D:\Waveforms\DDR3 folder and run all of the

tests. All of the variables are set to their defaults except Use Stored Waveforms is set to Yes and Use

Stored Trace for Speed Grade is set to Yes. The limit set in use is DDR3-1333. All supported tests are

run.

QPHY-DDR3 VARIABLES

General Variables

The following variables are used by all configurations. They can be used in conjunction with the test

selection and limit set selection to create custom configurations.

DUT Speed Grade in MT/s

Transfer speed of the DUT. Used to set the oscilloscope timebase and sampling rate, see Clock Period

Per Screen Division variable for more explanation. Choose between: 800, 1066, 1333, 1600 MT/s or

custom. Default is 1333MT/s.

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Teledyne-lecroy QPHY-DDR3 Instrukcja Użytkownika Strona 29