FREQ - The audio frequencies can be adjusted to match the user's
preference, by setting the Base Frq and Increments.
The Base Frq is the first frequency used to produce the initial sound which
corresponds to the climb threshold (by default 0.1 m/s). Later, as the
climb rate increases, a bip, bip sound is produced for which the cadence,
and frequency, also increase. The Base Frq can be set from 500 to 1500
Hz. The higher is the frequency value, the higher pitched the sound is. The
preset value for Base Frq is 700 Hz.
INCR - The Increments parameter sets the frequency increment for each
0.1 m/s climb rate increase. The increments can be set from 1 to 99 Hz.
The preset value for Increments is 10 Hz. Considering an Increments
value of 10, and Base Frq of 700 Hz, the vario frequency at 1 m/s is 800
Hz.
DAMP - The GPS LS vertical speed calculation is based on air pressure
variations. It is very seldom to have air pressure absolutely stable.
Turbulence caused by air moving near the sensor is suficient to cause
small variations in pressure. For this reason the GPS LS filters (averages)
the pressure data to prevent constantly detecting tiny pressure variations.
The value that defines how must the pressure is filtered is the Damper.
Setting a lower damper value caused the GPS LS to become more
responsive but harsher. Inversely a higher value causes the GPS LS to be
less responsive but smoother. The default value is 8.
BUZZ - Is so called because of the sound it emits, which resembles a
buzzing sound.
The buzzer sound is produced when the rate of climb is close to, but has
not yet reached the specified Climb threshold (see 13.3.1). This value is
set between 0 and 9 with each unit corresponding to be 0.1 m/s, ie. 3 is
0.3m/s. Subtracting this decimal value from the climb threshold will give
us the value at which the GPS LS will start buzzing.
For example with the GPS LS default values, Climb threshold=0.1m/s, and
Buzzer=3 (0.3m/s) the buzzing with start at -0.2m/s because 0.1 - 0.3=
-0.2. In this case at 0.1m/s directly below the Climb threshold the GPS LS
will emit a constant sound varying rapidly in pitch from around 100hz to
the set base frequency at which the first beep is emitted. This is the buzzer
sound and may resemble a growl noise. Setting the Buzzer value to 0
(zero) will disable the buzzer feature.
Although the Buzzer will sound very annoying on the ground it becomes
an amazing companion in flight allowing the pilot to pick-up thermals he
would have usually missed.
10.1 Advanced settings
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