Teledyne-lecroy QPHY-SAS3 Instrukcja Użytkownika Pobierz pdf (Strona 35)

QPHY-SAS3 Software Option

Tx Emphasis Off (IDLE_REF0)

The purpose of this test is to gain a reference point in order to compute the equalization calculation for

REF1 and REF2. There are no actual pass/fail measurements performed in this test. This test step must

be run in order to measure Ref1 or Ref2. This may also be referred to as REF3 or no equalization.

With the transmitter set to its maximum peak voltage the emphasis coefficients for REF0 must be set to:

Figure 29 – IDLE_REF0 Message Box

After the completion of this test the oscilloscope is in the following configuration:

Figure 30 - Oscilloscope Configuration after REF0 Test

922545 Rev A 35

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 49 50

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Teledyne-lecroy QPHY-SAS3 Instrukcja Użytkownika Strona 35