Guys,

Am taking stock of the multitude of options out there for installs e.g. 2.4, powerboxes, RX only etc etc

One of the questions I have that may help my decision is this....

My understanding of the Weatronic device is that it doesn't work on a pre-determinded frequency as such, rather it syncs to the EXACT frequency that your TX emits within the frequency range of the channel you are on, ensuring a 'better' RF link. Now, seeing as the Weatronic always uses the strongest signal from its 2 receivers, does this mean that if someone else 'on my channel' switches on and transmits on this 'same channel' but has a slightly different frequency variation of this channel that I will not get shot down as the Wea will swap to the RX that is receiving the 'stronger' i.e. more accurate (?) received signal from my TX????

Hope this makes some sort of sense??

Thanks,
Mark

PS To help explain, I mean that channel 80 standard might be 35.200Mhz but my TX on channel 80 transmits at 35.202mhz (which is the exact signal the weatronic binds to). Someone else on 80 may transmit on 35.204mhz

Hi Mark,

That is my understanding of how it works but I am no expert in this field. I have read on this forum that some guys have some tests where they have tuned the unit into one 10X and then switched on a second 10x on the same synthesized channel and have not noted any interference. Your suggestion seems to be a perfectly reasonable way of explaining this observation.

Having said that, I have chosen to install a powerbox royale RRS with two spektrum receivers in my airworld panther. Interesting times in which we are currently living!

Craig.

Mark,
I think I read somewhere that the synthesizer of the Weatronic is shared between the two receivers, ie they would both be on the exact same frequency (so much for redundancy []).
The ability to "bind" to the exact frequency won't help you if someone is on the "same" channel as it would probably only be a small amount the frequency is "off", and as soon as the "correct" transmitter is received with less signal strength, the "wrong" transmitter that is a little "off frequency" would be received with a strong signal, passing thru the filters in the reciver...
I might be wrong, but I think this is how it would work....

Mark,

Ask Weatronic, they have a superb service and they answer to all questions (in particular Mr. Gerhard Paasche from Weatronic-USA is extremely helpful).
They also have their own Weatronic Support Forum here on RCU : http://www.rcuniverse.com/forum/forumid_482/tt.htm

But, in my opinion, it is logical what they will tell you....

BTW : fantastic equipment, it's a one-unit total system too. I wouldn't hesitate myself to buy this again if I would ever need one.

Nicolas.

Mark,

There was a lengthy discussion about this here on RCU a while ago, but I don't recall which thread it was in so some serious searching may be required.

According to the info in that thread, several guys proved that the behavior was exactly as you indicate, and that multiple systems could operate side-by-side on the same channel, due to each having slightly different frequency.

Naturally, this is not something that should encourage 5 guys to go out intentionally flying together on the same channel at the same time, but the behaviour is at least comforting in letting you know that you are a bit less likely to be shot down by someone else on your channel, than if you were using a more widely tuned system.

Gordon

Nice, but I would myself not like it at all that someone with my neighbouring frequency is moving closer to mine, by offsetting his radio, (supposing I have cheaper standard equipment), only because HE wants to feel safer ! What about ME ??

You seem to be misunderstanding.

It's the RX that gets its freq tuned to the TX, not vice versa, so the freq that "he" transmits is no different when he uses a Weatronics RX than when he uses a JR / Futaba / etc.

Gordon

Mark,
This is exactly how the system works. I have actually flown a prop aircraft on channel 46 (72mhz) on a Futaba 9Z with another TX on the same channel turned on with sticks moving during the entire flight without a hint of interference and minimal frame loss inccured. Since the Weatronic system tunes to the exact frequency of the TX (when scan mode is performed), slight variation in the frequency transmission is ignored from the second TX unless it happens to be transmitting on the same EXACT frequency (unlikely).
Todd

Be careful here.....the receiver has a bandwith, it is not so that the frequency has to be exact within a couple of Hz in order to disturb ! This is a dangerous road to take and I would very strongly advise against it !!

..and Todd, define EXACT ?!

Guys,

Thanks for the info - very helpful.

Just to confirm that I, nor do I believe the others confirming my thoughts in this thread, are suggesting you can switch on 2 TXs on the same channel and all will be well!!

I was comparing the pros/cons of a 2.4ghz install vs the weatronic and the biggest Pro the 2.4 had going for it was the lack of being shot down. Now, if what is said on this thread is true, and there is no reason to question it, then the weatronic nudges ahead (in my mind) as the likelihood of someone being at my field on my channel generally seems to be low, the chances of them switching on by mistake whilst flying is even lower and now, with the resistance of the Wea to wayward signals, the chances are even lower. Probably low enough for me to stick with the Wea for now.

But, should the Wea boys rock on up with a 2.4ghz version of the wea then I'll show you a company that just took the market hands down!!

Rgds,
Mark

futaba fasst can have two 2,4 receivers on one radio

this is my set up with the help of the [link=http://dreamworksrc.com/catalog/product_info.php?cPath=161&products_id=1307]ROYAL[/link] powerbox

Hi

I Have the weatronics receiver tuned to 35.100 Mhz. When I fine tuned it to the TX ferequency, I realize there was a devaition of +1,2 Khz.

If a TX in the same frequency is turned on with a -2,5Khz or similar deviation is turned on, I believe it might not interfere and happens as you say. But if the second Tx crystal in the same frequency as the same +1,2 Khz or very similar deviation, what do you believe it will happen?

You will never know the tolerance in the invader TX crystal,

Nevertheless, in my perspective this is the best RF link you can have and to my knowledge the best value for what you get.

Just my 2 cents

Nuno

Mark,

Totally agree with you. If they would bring out a Wea FASST 2.4 GHz (respectively Wea JR 2.4 Ghz), they would simply wipe out any competition in one shot like with dropping a nuclear bomb. There are so many advantages in the user friendly Wea, that it would be the ultimate RX system for jets (and other complex planes). There would not even be a need for a DUAL receiver for this 2.4 version one, a single one would do fine with the SS transmission technology.
I also totally agree with you about the failsafe thinking. The last 25 years, I have never ever had one single case of failsafe caused by external interference. (Knock on wood) I do sincerely believe that most crashes/failsafes are the result of internal problems or weak installations, be it weak power supply, noise induced internally,..etc. and not by other transmission on the same frequency. If it did occur, it was of human stupidity and safety ignorance.

However, it came as a rather unpleasant information for me to find out that my current radio was 0,90 KHz offset too [:@]. I always believed mine was perfect, it even has special custom made crystals. Never ever had a transmission problem, though.

Nicolas.

Yorgos,

I do not think it makes sense to have a redundant RX system on 2.4 GHz FASST, as the transmission shifts to the next frequency every 2 milliseconds. Impossible to have radio interference, IMHO... Unless the whole 2.4 band is disturbed....[X(]

Nicolas.

Nicolas

Belle installation

JP

Jean-Pierre,

Merci. Voici le lien suivant : http://www.rcuniverse.com/forum/m_63...tm.htm#6553592

More than 20 pilots have received a set of my trays so far, looks like many will be using the Weatronic for the first time. Great equipment.

Groeten vanuit Seoul, Korea.
Nicolas.