PowerBox Systems PowerBox Cockpit SRS Instruction Manual page 15

Explanation of FS and HD:
• FS: If there is a complete loss of signal at all receivers connected to
the system, this output runs to a previously determined position. See
Point 3.9. for information on defining this position.
• HD: If there is a complete loss of signal at all receivers connected to
the system, this output remains in the last known valid position.
3.9. Teaching the failsafe positions
Access the OUTPUT MAPPING menu and set the appropriate outputs
to fail-safe as shown above. Now leave the OUTPUT MAPPING menu
and select the RX/TX SETTINGS menu, where you will find the TEACH
FAILSAFE POSITIONS menu point.
Use the transmitter to move all the model's control surfaces, the
undercarriage and the throttle to the positions which you want them to
take up if a fail-safe situation should occur, then press the SET button:
this action stores your selected positions.
Check the settings by moving all the functions to any "non fail-safe
position" at the transmitter - e.g. move throttle to "full-throttle" - then
switch the transmitter off. All the outputs which are marked FS in the
OUTPUT MAPPING menu should now move to the previously set
positions, whereas all outputs not marked FS remain in the last known
position.
Note: thanks to the backer's integral SRS system, and the facility to
operate two receivers simultaneously, the chances of complete
transmission failure are virtually zero. This claim is based on our three
years of experience with existing SRS products.
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