Precor 776i - Manual (Page 67)

The range of incline differs on the 966i treadmill. The height
remains at 15%, but you can choose a descending grade up to a
minus 3%. Refer to the following figure.
-0.5 — - 3
1 — 2.5
4 — 5.5
6 — 7.5
13 — 15
10 — 12.5
8 — 9.5
0 0.5 —
3 — 3.5
Column height Incline settings
Figure 9: Column height in the 966i program profile
Ten dots display the range of incline on the 946i treadmill. Refer to
the following figure.
0 — 0.5
2 — 2.5
4 — 4.5
5 — 6.5
11 — 12.5
9 — 10.5
7 — 8.5
1 — 1.5
3 — 3.5
13 — 15
Column height Incline settings
Figure 10: Column height in the 946i program profile
User's Reference Manual: Display Console 17