ENCODER CALIBRATION FOR AZ & EL (Binary Mode Code)
1/ PLEASE READ COMPLETELY BEFORE START OF CALIBRATION
THIS ONLY NEED TO BE PERFORMED ONCE IN THE LIFE TIME OF THE iBUTTON Cell (approx. 8 to 10 Years), or Until Something is changed in the field that will alter the gearing ratio
2/ Rotate Dish, or Array, to a "0" (zero), degree position. This position can be any
3/ Depress the "ZERO", normally open push button, SW‑2 on schematic. Now depress the MPU reset (RESET), SW‑1 on schematic. This operation clears the MPU registers and clears "touch memory" to zero.
4/ Using a very accurate compass ( I borrow a surveyors compass ), rotate the Dish exactly 360 degrees from the "zero" position.
You should now be calibrated "exactly” 0 to 360 degrees. Do NOT depress any more switches.
6/ Make sure your computer clock is accurate to time and date before continuing.
7/ Bore Sight the Dish (array), on the moon, using echoes, or peak on sun-noise. Write down the exact position of the moon on the piece of paper. Disregard the dish position indication at this time.
8/ Without moving the Dish, or Array, depress the AZ switch on the front of the control box and rotate knob until indicated position matches exactly the position noted above.
There are other methods, or techniques, for doing the same thing as described above and you may chose your own method.
For example: I used the SUN using peak sun noise on 23cm. This is very, very sharp with a 25' Dish.
The most accurate method is to use the "surveyors compass” IF you know EXACTLY
I have NEVER recalibrated my system since the initial calibration over four years ago.
You may remove power (VCC), voltage from the complete system it will
I have a relay in my VCC supply that will not allow me to move the Dish unless VCC is
Elevation calibration is performed nearly the same way as AZ calibration.
Locate the Inclinometer so it may be rotated EXACTLY 360 degrees. Depress the “zero” switch and next the “reset” switch.
After calibration is completed you can set your offsets and then using the EL, or AZ switch on the front panel reposition the display to indicate the true settings.
Thanks and enjoy. Darrell, Ve1ALQ
Canadian Amateur Radio Station VE1ALQ & VE9DW
Canadian Amateur Radio Station VE1ALQ & VE9DW VE1XYL when allowed