[Ronja] Ronja Digest, Vol 58, Issue 13

[eldis]

twibright na hispeed.ch napsal(a):
> ---- eldis <eldis111 na seznam.cz> schrieb:
>   
>> ML6652 might look like good choice, but I wouldn't recommend it.
>> There have been reports of malfunctions and bugs in this chip. In my 
>> opinion this is because of very noisy enviroment.
>> As you know, fiber optics (ML6652 standart usage) means,
>> that manufacturer is not taking into consideration that much noise on 
>> RX. When some bad packets arrive,
>> ML6652 can freeze (and will, on ocasions).
>>     
>
> Lol, this is really ridiculous. Welcome to the 21st century :) Has a
>   

Yeah, we all live in 21st century, and use standart SMD instead of that 
old TH..
If you don't believe me, it is just your call..

>> I've worked on 100Mbps FSO some time ago, even had chance to speak with 
>> designer of 10Ghz radio.
>> He told me about problems with interpreting damaged data, and flows in 
>> cheap convertors.
>> My design use for TX - MAX3263,
>> RX - MAX3657 for TIA, and MAX3645 as limiter.
>> Convertor based on RTL8305SB, IMHO there are better choices, but only in 
>> +1000 quanties
>> Cheap PIN photodiode from Vishay (1,8pF).
>>     
>
> Which model number?
>   

It is that hard to figure out? even non-english speaking person wouldn't 
have problem,
to look at that tiny list of fast PIN from Vishay..

TEMD1020..

>   
>> This design worked, but never finished.
>> As for VCSEL, it is good choice, if you find some with enought power.
>>     
>
> Are there any VCSEL devices available in every street corner electronics shop?
>
> CL<
>
>
>   
I doubt that, have you seen any?


BTW, ML6652 does NOT have to transmit autonegotiation, in fact it is 
hard coded to some mode.. 
at least thats what I remember from studying DS.

eldis