It is neccesary for calibration to find the maximum value of the earth magnetic field in each axis, so when pushing the calibration button, the microcontroller will read the value of both magnetorresistive sensors and will determine the maximum value of each one. For this purpose we will have to move the Head Track (HTS) in all directions in order to determine these values. (see the video).
Calibration process:
1. - Place the system as far as possible of big metallic things or magnets.
2.- Place the HTS parallel to the earth surface.
3.- Push the calibration button during 4 seconds.
4.- Rotate the HTS 360º around it, you will hear a "beep" when the system finds a value of magnetic field greather than the value stored.
5.- Rotate the HTS in all the possible axis.
6.- The calibration process will end when the "beep" stops.
Configuration process:
To enter to the configuration menu you have to press shortly the config button. After that you will hear a set of long and short “beeps” which indicate in one hand the option and in the other hand the value for each option.
A long beep indicates the main menu option
A short beep indicates the value for each menu option
After a short beep, if you push the config button, the option is selected, and the HT repeats the number of beeps corresponding to the option selected. After that, it passes to the next option menu. If you don’t push any button, at the end of the short “beeps” you will hear the default option.
MENU EXPLAINED
ð 1 Long beep (first option) you will select the PPM modulation:
o 1 short beep indicates negative PPM (for Futaba transmitters)
o 2 short beeps indicate positive PPM.
# by default the option is 1 (negative PPM)
o 1 short beep indicates 1 Channel Transmitter.
o 2 short beeps indicate 2 Channel Transmitter.
o 3 short beeps indicate 3 Channel Transmitter.
o 4 short beeps indicate 4 Channel Transmitter.
o 5 short beeps indicate 5 Channel Transmitter.
o 6 short beeps indicate 6 Channel Transmitter.
o 7 short beeps indicate 7 Channel Transmitter.
o 8 short beeps indicate 8 Channel Transmitter.
# by default the option is 8 (8 channels for the Futaba FF9)
o 1 short beep indicates AZ in Channel 1.
o 2 short beeps indicate AZ in Channel 2.
o 3 short beeps indicate AZ in Channel 3.
o 4 short beeps indicate AZ in Channel 4.
o 5 short beeps indicate AZ in Channel 5.
o 6 short beeps indicate AZ in Channel 6.
o 7 short beeps indicate AZ in Channel 7.
o 8 short beeps indicate AZ in Channel 8.
# by default the option is Channel 7 for AZ Signal.
o 1 short beep indicates EL in Channel 1.
o 2 short beeps indicate EL in Channel 2.
o 3 short beeps indicate EL in Channel 3.
o 4 short beeps indicate EL in Channel 4.
o 5 short beeps indicate EL in Channel 5.
o 6 short beeps indicate EL in Channel 6.
o 7 short beeps indicate EL in Channel 7.
o 8 short beeps indicate EL in Channel 8.
# by default the option is Channel 8 for EL Signal.