Linking Training Sites

Symmetry, synchrony/coherence and assessments should always be linked because they are training comparisons or relationships between the two channels. Comparing each channel against a separate reference allows error to creep into the measurements by adding another variable (the signal at the reference) to change the apparent relationship.

The jumper/linked references allow you to combine the signals from the two reference sites, and compares each of the actives against exactly the same value. I guess you could say that “zeroes out” the references, but I’d say it just equalizes them. They’re still subtracted from the active sites to give you the signal.

Some guidelines

If you are using a COMMON reference (e.g. F3/A1/g/C3/A1–both channels using A1): YES, link.

If you are using LINKED reference for “comparative” training (e.g. coherence/synchrony, symmetry, assessment): YES, link.
If you are doing “summed” training (squish, squash, windowed squash), use it if you wish, not if you don’t. Doesn’t matter.

Otherwise use independent references, meaning that the link button should NOT be on.