The settings A1 thru A5 are your altitude choices to program your unit for optimal performance based on the altitude of where you live.
| Altitude (m/ft) | 0 – 499 / 0 – 1637 | 500 – 999 / 1638 – 3278 | 1000 – 1499 / 3279 – 4918 | 1500 – 1999 / 4919 – 6558 | 2000 > / 6559 > |
| Parameter | A 1 | A 2 | A 3 | A 4 | A 5 |
