Other Advanced Rth Settings; Acoustic Variometer - Eagle Tree Systems Vector User Manual

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Normal: When your model comes closer than the "Home Altitude Radius" set below, and RTH is active,
the model will descend or climb to the "Home RTH Altitude" specified below, and return home per your
settings.
Throt Off: (fixed wing only) This is the same as "Normal" mode above, except that the throttle
is turned off when the model is closer than the "Home Altitude Radius," which would normally cause your
model to descend to the ground, using the stabilizer to keep the wings level. This feature is useful if your
model returns home, but you still cannot regain RC link. Note: if your model easily stalls with the motor off,
this may not be a good option for you!
2) Next, set the "Home RTH Altitude" item to the desired inner RTH altitude (the altitude that RTH will target
when closer than the distance radius below).
3) Set the "Home Altitude Radius" item to the desired distance from home at which the model will target the
"Home RTH Altitude" described above.

7.5.2 Other Advanced RTH Settings

7.5.2.1 Minimum Speed for RTH
The "Minimum Ground Spd (0 disable)" menu item is useful if you are flying in windy areas, and RTH could
be triggered downwind. If your model is returning to home at a speed lower than specified ground speed,
RTH will use your 'Climb' throttle setting instead of the 'Cruise' throttle setting to attempt to increase your
RTH speed. Waypoint navigation also uses this setting.
7.5.2.2 Enabling Low Altitude RTH (Fixed Wing only)
If you fly in such a way that it's necessary to have RTH engage the propeller at altitudes below the normal
altitude cutoff (such as if you fly off cliffs, or otherwise fly below the altitude of the takeoff point) you can
set the "Permit low alt RTH (Caution!)" menu item to "Yes". Setting this to "Yes" defeats the Vector's
automatic disabling of RTH throttle control below altimeter readings of about 60 feet (20 m).
Since enabling this option increases the likelihood that RTH will inadvertently activate your throttle on
the ground, it should be used with extreme caution!
7.5.2.3 Disabling PCM Glitch Detection
In addition to checking to see if your receiver is in failsafe mode, as an additional layer of protection the Vector
also monitors the health of the signals coming from your receiver. If the Vector sees receiver pulses that are
out of spec (too long or too short), or if servo pulses stop altogether for a channel, RTH will be triggered.
Eagle Tree occasionally gets reports of receivers (usually low cost ones) that will sometimes send invalid
signals even when they have a good link. If you see RTH triggering with the message "RTH Engaged: Too Many
Rx Glitches" or "RTH Engaged: Bad Rx Pulsewidths" and you are certain that the receiver is not losing link, and
that there is not a loose connection when these occur, you can set "Disable PCM Glitch Detection" to "Yes".
Please note that if you do this, a broken wire or loose connection from your receiver will NOT trigger RTH!

7.6 Acoustic Variometer

The Vector includes a powerful acoustic variometer, with total energy compensation and other advanced
features. The variometer sounds are provided via the Vector's audio output to your video transmitter.
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