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Question about REFCLK_GXB_CHB and REFCLK_GXB_CHT in Tranceivers of Arria10 SX

Altera_Forum
Honored Contributor II
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Hi, what's the difference between REFCLK_GXB_CHB and REFCLK_GXB_CHT in Tranceivers of Arria10 SX? 

Does the "CHB" refer to Bottom and "CHT" refer to Top? 

I plan to design a SRIO 4x in a tranceiver bank,should I connect both CHB and CHT to a clock source individually,or just connect one of them to a clock source while connect the other one to GND? 

Thanks.
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