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PCMA within 4k TPC QPSK Upstream

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Moustafa
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Posts: 1
Sep 21st, 2016 at 1:02pm  
Dear,
I would ask you if there is anybody who has experience with using PCMA with 4k TPC QPSK Upstream in iDirect 5IF HUB (XLC-11, X5, iNFINITI sw iDX 3.1.0.1)?

We have testing it and see that it starts to work from sym. rate 750kSps (QPSK FEC 0.793 4k TPC). If we use lower sym. rate it does not work anymore. The Downstream is 2650kSps QPSK FEC 0.793

Thank you for a help and any ideas.
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« Last Edit: Sep 22nd, 2016 at 2:55pm by Moustafa »  
 
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