Design for a Positioner with DiSEqC Decoder

H

harm lok

Member
Messages
29
My Satellite Setup
echostar / pace / aston
My Location
The netherlands
Some progress with the hardware .
With thanks to Mike Berg ... N0QBH i have used his zero detector to build a diseqc pickup for decoding the signal and decode it into my cortex environment. I have build the zero detector into a old housing off a antenuator .
diseqc01.jpg
Before closing it again.
diseqc02.jpg
Here ready and connected between the v-box and and the receiver.
I have also baked a pic for monitor the pickup with a display .
diseqc03.jpg
The pickup is working perfect with cables off 2-4 metres.
The only part to build is a signal meter with a voltage output.

Maybe there are already people who have build such a universal signal meter. It would be nice to design something that's detecting any receiving signal from a satellite (analog and digital) without the needed of a complicated receiver / amplifier chip..

will be continued..
 
Llew

Llew

cerca trova...
Staff member
Messages
14,984
My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
Some progress with the disecq decoder

Thanks for the effort Llew.
This day i have received the complete diagram of the sr8700 (including the power supply) from a old echostar employee .
So if some people would like tho have a copy please send me a pm
That's quite a find by you harm - rare to get any Echostar service info these days, even though (or perhaps because) it's ancient stuff. Kudos to you :)
I'll PM.
 
H

harm lok

Member
Messages
29
My Satellite Setup
echostar / pace / aston
My Location
The netherlands
I have completed and justified the algorithm for the positioner software en also put it into c++ for a cortex processor. But the code uses a lot off mathematical functionality / processor power. Maybe it is better to generate a lookup table indexed in count pulses during power up off the positioner. In that way a (cheaper) M0+ cortex processor can do the job.


For people who like math , i can send the mathlab code to generate the code and this animated plot (gif) for your dish situation.
You wil need a mathlab/simulink software installed.
 
H

harm lok

Member
Messages
29
My Satellite Setup
echostar / pace / aston
My Location
The netherlands
For people who like math , i can send the mathlab code to generate the code and this animated plot (gif) for your dish situation.
You wil need a mathlab/simulink software installed.
Sorry i can not upload the gif file
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
29,969
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK

The forum accepts only .jpg and .zip files for attachment, with limit to size.
 
H

harm lok

Member
Messages
29
My Satellite Setup
echostar / pace / aston
My Location
The netherlands
The forum accepts only .jpg and .zip files for attachment, with limit to size.
I have converted the file to a zip file in the attachment. Accepting gifs with the same size as a jpg can give the forum more movement.
 

Attachments

A

a33

Specialised Contributor
Messages
650
My Satellite Setup
XSAT410
Rebox RE-9000
My Location
NL
... and this animated plot (gif)

Why did you, instead of using one straight blue line, make this a blue line with a fixed angle in it?
I cannot think of a reason or a function for that, in the calculation.

I assume the blue line represents what I call the TopBolt of the actuator (on the dish) to the rotation axis on the mount (your blue/black dot in the gif-file).

Greetz,
A33
 
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