MGL Avionics Stratomaster Ultra Horizon XL Owner’s manual
Page 55
Compass and Horizon setup
This menu is accessible from the main menu.
Here you will find various functions to setup and calibrate your SP-1, SP-2 or SP-3 sensor
package.
This documentation should be read in conjunction with the documents for the various sensor
units.
Horizon Setup
Set Bump factor
This function presents you with a small menu. You can send one of five
settings to your SP-3. This function will only work if you have a SP-3
connected. The setting is stored in the SP-3, the highlighted entry that is
shown is NOT the setting in the SP-3, only the setting that you want to
send to the SP-3. The SP-3 stores the setting in permanent memory, the
setting is not lost if you remove power from the unit.
This filter has five settings: Lowest, Low, Medium, High, Highest.
This filter sets the threshold that determines un-accelerated flight. It can be viewed as a limit on
the acceleration force acting on the aircraft below which the gyro derived attitude will be corrected
by the attitude as derived from the accelerometers.
Typical settings are Low or Medium. Other settings may be useful in some environments.
Effect of too low setting:
System will never or only very seldom have the opportunity to correct errors. Continuous
turbulent flight will require a higher setting.
This setting is normally chosen on the mass of your aircraft and how it behaves with turbulence.
The more stable your aircraft, the lower a setting you can choose.
Effect of too high setting:
System remains in “accelerometer” mode too long. The most noticeable effect this has is during
very slow entries to banks – the displayed horizon may show horizontal even though you have
banked or the bank angle is shown too shallow. As the horizon is now wrong, the error will grow
quickly as gyro rate information will be misinterpreted.
Set Slew factor
This function presents you with a small menu. You can send one of five settings to your SP-3.
This function will only work if you have a SP-3 connected. The setting is stored in the SP-3, the
