Flymaster NAV, Руководство пользователя

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13.2.3 UTC offset
Using GPS data, the NAV automatically adjusts the internal clock to the Universal Coordinated
Time (UTC). The user should adjust the UTC offset so that the time displayed by the NAV matches
the local time.
13.3 Vario Acoustics
The user can change the climbing, and sinking rate sound through the respective threshold values.
These thresholds correspond to the climbing and sinking rates at which the sound activates. The
user can also define in the Acoustic Thresholds option the sink alarm and the sound volume of is
the NAV (Figure
13.4 ).
Figure 13.4: Vario Acoustics
13.3.1 Climb Threshold
The Climb Threshold defines the rate of climb at which the vario will start beeping. The frequency
of the first beep is defined in Base Frequency hz, the sound frequency will become steadily higher
with by Increments hz value.
The default value for Climb Threshold is 0.1m/s.
13.3.2 Sink Threshold
The Sink Threshold is the rate of descent at which the vario will emit a constant low frequency
sound. The deeper the sink rate the lower the frequency will sound. Default value for this item is
-2 m/s, we suggest setting a value lower than the natural sink rate of the glider when flying with
speed bar in still air.
13.3.3 Sink Alarm
The Sink Alarm is highlighted when the confirmation of Climb TH is made. The Sink Alarm defines
a vertical speed value at which a sound (alarm siren) starts to be produced. This alarm can be used
to identify high vertical speeds, as for example, in a spiral dive. Set the Sink Alarm to 0 to disable
the alarm.
13.3.4 Base Frequency
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, usually 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.
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