US 12,218,710 B2
Per-channel modulation error ratio (MER) calibration and determination on a multi channel receiver
Loren R. Eggert, Indianapolis, IN (US); and Daniel K. Chappell, Greenwood, IN (US)
Assigned to Viavi Solutions Inc., Chandler, AZ (US)
Filed by Viavi Solutions Inc., San Jose, CA (US)
Filed on Jan. 21, 2022, as Appl. No. 17/581,376.
Application 17/581,376 is a continuation of application No. 16/910,635, filed on Jun. 24, 2020, granted, now 11,239,924.
Claims priority of provisional application 62/868,192, filed on Jun. 28, 2019.
Prior Publication US 2022/0149959 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/66 (2006.01); H04B 17/21 (2015.01); H04B 17/26 (2015.01); H04B 17/336 (2015.01); H04L 1/00 (2006.01); H04L 1/20 (2006.01)
CPC H04B 17/21 (2015.01) [H04B 17/26 (2015.01); H04B 17/336 (2015.01); H04L 1/0003 (2013.01); H04L 1/206 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method, said method being performed by a processor of a test instrument adapted to monitor at least one channel in a multi-channel network, said method comprising:
determining a noise floor of the test instrument;
measuring an input signal received over the at least one channel;
determining a theoretical modulation error ratio (MER) ceiling by subtracting the noise floor of the test instrument from the input signal;
measuring an MER for the at least one channel;
determining if the measured MER is worse than the theoretical MER ceiling; and
computing a calibrated MER based on the measured MER and the theoretical MER ceiling if it is determined that the measured MER is worse than the theoretical MER ceiling.