Teledyne-lecroy QPHY-SAS3 Instrukcja Użytkownika Pobierz pdf (Strona 20)

• F8 is a view of the Differential Signal after it has been filtered by the 4.5GHz low-pass Butterworth

filter. This is calculated by subtracting the negative input from the positive input. This signal is

used to create many of the traces described earlier.

Figure 10 - OOB Test Results

In the Measure section:

• IdleNoise (P1) is the peak-to-peak measurement of F3 (idle differential signal). This is the measured

value for Tx – Max Noise During Idle (5.1.1). This value must be less than 120mV(P-P) in order

to pass the test.

• OffsetDelta (P3) is the mean amplitude of F4 (burst differential signal). This is the measured value

for Tx- OOB Offset Delta (5.1.3). This value must be between -25mV and 25mV (inclusive) in

order to pass the test.

• BurstAmpl (P4) is the peak-to-peak value of F4 (burst differential signal). This is the measured

value for Tx – Max Burst Amplitude and Tx – Min Burst Amplitude (5.1.2). The maximum

value must be less than 1.6V and the minimum value must be great than 240mV in order to pass

this test.

• CMMdelta (P7) is the difference between the mean of the Burst Common Mode Signal (F5) and the

Idle Common Mode Signal (F7). This is the measured value for Tx - OOB Common Mode Delta

(5.1.4). This value must be between +/- 50mV in order to pass this test.

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Teledyne-lecroy QPHY-SAS3 Instrukcja Użytkownika Strona 20