ND
Joined: 25 Sep 2007
Posts: 53
Helped: 12
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 25 Aug 2008 18:48 Re: MER [hlp] |
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Well, if we assume that SNR is a baseband measurement, there really is no practical way to measure baseband data SNR. A better parameter is modulation error ratio (MER), which is analogous to baseband SNR. MER takes into account the combined effects of CNR; transmitter, upconverter or cable modem termination system (CMTS) phase noise; and impairments such as second and third order distortions. MER is, by definition, 10log(average symbol power/average error power).
This is part of text from following link: http://www.cable360.net/ct/operations/testing/14912.html
Best regards,
Dejan
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