Thread: Terrible performance Leicester (LE3)
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Old 18-12-2010, 21:21   #140
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Re: Terrible performance Leicester (LE3)
5120Ksym/sec is the underlying symbol rate used on the upstream channel. 16QAM modulation transmits 4 bits per symbol, so 5120,000 symbols per second = 20,480,000 bits per second = he's on a 20mbit (DS2.0+) upstream channel.

From what I understand it legacy upstream channels are 10mbit (2560Ksym/sec 16QAM) and a 20mbit upstream channel is a prerequisite for 10:1 upstream.
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