Techniques > Radios

Moving to 2.4Ghz....

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Fred:
Oh, on a side note, I did not noticed to be more "in touch" with the glider...
The t8z is 1024, and to be honest, no differences at all.
We'll see with tha Alpina next.

IceWind:
Fred,

T8Z? Futaba?
Most futaba if not all only do 1024 or 2048 (new ones) when using PCM on PPM they do 512
and only use only 8 chn. :( So if you're using the corona module you'd need to be in PPM and stuck in 512.
Could be this why you didn't noticed any difference?

Keith,

I particularly enjoyed the tests regarding using 1 or 2 antennas. There was much fuss going around because one of the antennas in the Assan modules are connecting to ground, and on the micro rx's they have only one. So the assumption was that the second one was there only for decoration or to look like the Spektrum modules.
If those tests are correct they indeed seem to help on the noise filtering.
If you like those articles I can get you tons. In Portugal the 2.4Ghz usage is still not very well defined and for quite some the discussions ended in collecting loads of information about the several systems offered.

Happy Days:
I doubt that the “extra” antenna is for decoration purposes Nando. Most antennas have a “grounded” side.  The grounded part improves the reception of the whole antenna system.
I imagine the rx with only one antenna wire is for short range, possibly indoor , use only.

It’s been many years since I studies matters such as the Law of Antenna Reciprocality, and the inverse square law of power over distance. :roll:  God, doesn’t that sound sooooooo boring! I’m not sure if knowing all the above makes me a Geek, or a Nerd. :oops:  What do you think?

K.

Fred:
Hey Fernando,

For the resolution of the Ct8Z module (sorry, missed the C in the module name!  :oops: ), according to Corona, and a few guys on RCGroups, this is a 1024 system (Same for all the DSSS stuff it seems  :?: ), but I have to admit that I don't have a clue, I'm just a basic user of that stuff :?

Keith ---> You're a geek !  :P

IceWind:
Keith,

I admit I had no opinion on that. For me radio frequencies and related matters is a strange world, don't fit in my limited electronics knowledge.
But I was smart  enough not to cut the extra wire. :-)
+1 for Geek.

Fred,

Well the idea that i had was that ti depends on the radio, receiver and servos.
They have to be able to work with the 10bits resolution to get the 1024 steps resolution, but I'll check that out.

I leave here another link in case you guys don't know it.
http://www.rcmodelreviews.com/corona_dsssv2.shtml
This is a review to the Corona system.
This guy performed the sames tests to other brands as well and have some really nice videos on youtube about the tests.

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