Syvecs probably ties the firing order into the voltage received by the knock sensor.
Without listening with det cans it would be difficult to tell if it is actually knocking or not.
Knock readings are only as good as the calibration of the sensor.
If the logging you are seeing it there all of the time or gradually increasing with rpm then it isn't knock. Just some form of background noise.
You should see a steady increase in level as the rpm increases. If this suddenly jumps up to a much bigger number, then this is knock.
The hot spot for knock is 4800rpm - 5400rpm, which corresponds to peak torque/engine load and hence where timing needs to be most retarded.
You can start to advance the timing again after this period.
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