[Ronja] Ronja Low Distance

[Karel Kulhavy]

---- pedro.lopezestepa at epfl.ch schrieb:
> Hello,

> MIC is Microcontroler/DSP, I want to use it, underwater in a low  
> distance transmision. I dont understand why they use BPSK with analog

The BPSK is the modulation used in Ethernet. But it's not a BPSK with sine
wave, but with square wave.
  
> output and they give the signal to a LED, They do a AD convert before  
> the LED?

Yes the transmitter gets the signal from a cable and converts it to digital
levels before the LED.

> And the other question is what type of drive use them for the LED.

The type of drive is obvious from the TX schematic. It's a bunch of 74HC gates wired in
parallel, feeding the LED over a resistor. The Nebulus TX has a different drive
mechanism.

Karel

Thanks
Pedro

Karel Kulhavy <twibright at hispeed.ch> a écrit :

> ---- pedro.lopezestepa at epfl.ch schrieb:
>> Hello,
>>
>> I want to do it for 2 meter and with a MIC for do the modulation, its
>> posible use ronja desing for the LED's drive?
>
> With MIC do you mean microphone or microwave integrated circuit?
> I don't understand the question the Ronja design is used for the
> LED's drive so obviously it is possible.
>
> Karel
>
>



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