Could be nothing, could indicate you've been moved from a profile using 16QAM for data and QPSK for maintenance to one using 64QAM for data and 16QAM for maintenance.
There are a few 'interesting' software caveats on one of the CMTS platforms. If you've been resegmented onto one of the new CMTS that'd explain it.
---------- Post added at 13:43 ---------- Previous post was at 13:42 ----------
Quote:
Originally Posted by Kushan
Interesting, I thought QAM16 was standard for quite some time now and qpsk was only used as a fallback.
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QPSK is used for the station maintenance and requests as that's data you really, really want to get through untouched, so if the CMTS allows it you tend to use a lower order modulation for those.
---------- Post added at 13:44 ---------- Previous post was at 13:43 ----------
Quote:
Originally Posted by chambohambo
Is it correct that 64QAM is more prone to interference than 16QAM?
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Yes.