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IP and IM timing

Category: Datasheet/Specs
Product Number: LTC6820

Hello, two LTC6829 are capacitively coupled,  the cable length between the  6820 is ~2 Feet. The capacitor is located in the destination PCBA 

1. The resultant IP-IM waveform includes a tail, which results in not meeting the 1/2PW(D)  spec of 60ns. It's unclear what the ramifications are, but functional it appears to work. 

A. What are the ramifications if the timing spec is not met ?

B. If there was a problem, how would it manifest?


2.  The IP and IM are pulled up with 3K R, changing the pull up to ~500R helps. How much current can the IP/IM sink