The Knock Threshold table is used to allow the system to know when knock has occurred compared to normal background noise. The values in this table are the knock level above which true engine knock is said to be occurring. To set up this table correctly the engine should be tuned so that it is certain there is no engine knock present. Knock Level should be monitored and the table set up so that it is slightly above the Knock Level under all RPM and Load conditions, typically by approximately 3 to 5 dB. When engine knock occurs you should see Knock Level spike to a much higher value which exceeds the values in the table, and then the Knock Detection system will accept this as being a knock event. Up to 3D mapping is available with this table.