We have a new design with a TSB81BA3 (and TSB82AA2) connected to a Unibrain 1394 card in an XP PC with their analyzer software. Sometimes they synchronize at reset, many times they don't when we power-up our side (without making any changes). When they synchronize, the connection seems pretty robust (does not drop out). Can anyone suggest an analyzer/scope setup that will allow me to capture the B-mode tone waveform for analysis?
Please connect TPB1+/- and TPB2+/- to ground.
I implemented your suggestion but it has not resulted in any change in our situation. We still need to hold TPB bias voltage sense node to ground while cycling power (more than once, typically) to restore sync/communication. We are considering replacing the PHY device itself in case something has affected it.
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