This counter tracks the number of codewords received on this channel that contained errors correctable by the receiver's forward error correction, again counting all codewords on the channel regardless of destination. Admins watch this counter because a rising trend, even without actual data loss, signals a degrading RF environment before it becomes bad enough to cause uncorrectable errors. For example, a steadily increasing cwdIfSigQCorrecteds on one channel compared to others could be an early warning of a developing interference or signal-quality issue on that channel.