[Ronja] Distance between multiple Tx beams

[Karel Kulhavy]

---- Cecilia Puon <cpuon at fsomexico.com> schrieb:
> I have read this pages and I understand that I win intensity if I use
> two Transmitters but I do not know which is the maximum distance that I
> can separate these Tx if I do not want to distorsion the signal. 
> 
> Do I have to direct the two Tx's beams through the same point in the
> len?Because I dont want to distorsion the signal.

The longer the link the more you can separate the TX's and still fit into the field
of view of the receiver.

The photosensitive area extends over the whole diameter of the RX diode in SFH 203, as
can be seen by naked eye. Not sure how it is with BPW 43. The RX diode is 5mm in diameter and focal length about 30cm. This gives ratio of 5:300 or 1:60. For every 600 meters of track you can theoretically separate the TX 10 meters.

In practice, since the images of the transmitters in the receivers are not points but
blotches, the separation should be kept less, I would guess one third of that, i.e. 1
meter every 200 meters.

Regards,

Karel
> 
> Thank you for your help. 
> 
> Cecilia Puon.
> 
> 
> El jue, 19-11-2009 a las 12:05 -0600, Russell Valentine escribió:
> 
> > http://ronja.twibright.com/metropolis/dist.php
> > 
> > Get your intensity number from (notice the dual TX table):
> > http://ronja.twibright.com/msmt/gains.pdf
> > 
> > Then find the range from here:
> > http://ronja.twibright.com/drawings/dist.pdf
> > 
> > 
> > Cecilia Puon wrote:
> > > Hello, I have a question. What is the distance between two Tx beams
> > > which are used to transmit the same signal to one Rx?, with the proposal
> > > to improve the range. 
> > > 
> > > Thank you for your answer.
> > > 
> > > Cecilia Puón.
> > > 
> > > 
> > 
> > 
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