EME Controller OE5JFL May 2009
Page 3 of 13
Short description of the features
- Computation of position (without PC !)
for Moon, Sun, Cassiopeia, Cygnus, Sagittarius,
Taurus, Leo, Aquarius and a RA/DEC value of free choice
- Azimuth and elevation motor controlling
for all targets plus two free choice AZ/EL positions
- Interfacing with different absolute encoders:
ETS25, HH12, HH16, A2-S-S
- Selectable step size for tracking
(full, half, quarter resolution)
- Selectable offset for azimuth and elevation
(+/- 9.9 degrees)
- Operation by 4 buttons at controller
- Nonvolatile storage of all parameters
- Real time clock
- 4 x 20 character LCD - display
Settings:
- All functions and parameters can be set by four buttons on
the controller named: SHIFT, + , - , AUTO
To run through the setting menu, keep the SHIFT key pressed and press
+ or – key. You will see the cursor blinking at the parameter you
choose.
For changing the parameter itself, just press + or – (SHIFT released).
For the first 10 increments or decrements the least significant digit
is changed, then the next higher digit is selected.
If you press (only) the SHIFT key for more than 5 seconds, Doppler
shift is displayed instead of date. For switching back to date
display again, press SHIFT for another 5 seconds.
To switch between automatic mode on/off, press AUTO key (toggle
switch) After changing target, you are always in AUTO OFF mode. In
AUTO ON mode you see arrows blinking (output switching signals
activated) or ‘asterix’ when the antenna is in position.
Following parameters can be set:
antenna offset:
+/-9.9 deg in
az
imuth and
el
evation
step size:
full,half,quarter resolution, depending on encoder
target:
Moon, Sun, Cassiopeia, Cygnus, Sagittarius,
Taurus, Leo, Aquarius, RA/DEC, AZ/EL2, AZ/EL1
AZ1,EL1 and AZ2,EL2
: free choice antenna positions
R
ight
A
scension and
Dec
lination for free choice target
QTH:
lon
gitude,
lat
itude
encoder type:
(in the moment) SSI for 10,11,12 bit binary,
SSI 12bit gray, A2-S-S, MAB25 10,11,12 bit
band
: for Doppler shift display
second, minute, hour, day, month, year
MAIN RESET:
In some cases (battery empty,..) you might need to make a
MAIN RESET: Hold
SHIFT key pressed during power on
(or together
with pressing reset shortly)
In that case you have to set again most of the parameters (date,
time,..) by running through the menu, because values in the memory
were reset to original parameters.
FIRMWARE UPDATE:
The firmware can be updated via the RS232 port. You
need to run Flip software from Atmel (freeware) to load a new HEX-
file to the 89C51ED2. Before you have to set the two jumpers on the
PCB. Flip
settings are at preferences, AutoISP (More) RST(DTR) active
Low.
When the update is done, remove the jumpers again.
REMOTE BY PC:
By ASCII commands listed at the end of this documentation
it is possible to read and write parameters via a PC COM port.
