The newest GX scans take 26 minutes. You can get a faster scan is you use the GX Fast Biofeedback Scan (C) - JW, that takes 7 minutes. The slower scan takes 4 times the readings that the shorter scan, but cutting the Initial Step size in half, and by doing 2 loops of the scan.
The fast 7 minutes scan has higher precision than the old 6-minute scan. If you want more frequencies in your scans, change "Max Hits to Find" in the Biofeedback pane of the Control tab from 10 to a higher number. ( like 20)
For more details, please check the link: