B&G Deckman - Manual (Page 175)

Chapter 12: Deckman files
12.16
low pass;
ripple fraction
0.1
8 as 7 for 360° Damping in secs
9 as 7 for 180° Damping in secs
10 3rd order
Chebyshev
band pass;
fixed coefs
(DO NOT CHANGE: used for
rate gyros, see below)
11 Non-linear (See below)
12 Non-linear,
for 360°
(See below)
13 Non-linear,
for 180°
(See below)
14 RMS
calculation
Root mean square – for
example, in calculating wave
amplitude
15 Period
calculation
Period calculation – for
example, time between waves.
16 As for 6 but
for 0 to 360° Calculates a moving average
(see below)
17 As for 6 but
for 0 to 180° Calculates a moving average
(see below)
Functions 11, 12 and 13 are exponential functions which will cause the
data to move more quickly if the difference between the new data and
the last value move outside a bound. The first damping number is as for
functions 1-3 (i.e. - inverse of required damping time in secs/10); the
second specifies the bound—outside this value, the damping becomes
less until at 8 times the bound value there is almost no damping at all.
These functions are particularly useful for boat speed and heading when
coming out of a tack. For example, the line
12 0.2 4
gives a damping of 1 second in normal use (inverse of 0.2 divided by 5);
however, when difference between the new data and the last value is