JR-9303 2.4 Field Results

[1bwana1]

Tailwind,
That is very revealing info. Your numbers are way lower than ours. I'm surprised that you mounted one of the remotes up close to the engine. Intuitively it seem that the further away you stay from large metal objects the better. Did you use the data logger to help position things? I'll try and get my friend to send some pictures of the installation and post them. He and his Carden are serving as the guinea pig for the X9303 tests.

[Tailwind]

Steve,
The ant on the motorbox is on the aft section directly above the wing tube. My digital camera is MIA or I would take some pics of my installation. I have not had to move mine at all, I wanted a good spread, between the ant's, just got lucky, but Big Lew has his in his 40% Carden with the same #'s as mine. I have never seen mine go into hold and 90% of the time the fails are less than 10. I have flown it out as far or farther than I flew it on 72mhz. I know this thread was on the new radio but hope my info helps.

Dom

[1bwana1]

Here are a couple of pictures of the installation. Any suggestions of insights will be appreciated.

Here you can see the Main RX sitting on the power expander, which is installed on the platform made by the two cross braces. This keeps the setup fairly high up in the center of the fuse. You can also see the first satellite RX installed on the opposite side of the fuse.



here you can see the second satellite RX wires running back to where it is installed about 1/2 way to the tail and up at the top of the turtle deck.

[bodywerks]

It would be nice if the logger gave you some idea of what is considered acceptible, wouldn't it?
I do know that the transmitter sends several frames per second. it could be that you only lost one-one millionth of the total frames sent during the flight, which would be pretty darn good. Fades and frame losses are not as bad as holds. Getting that number to 0 is what I'd be focusing on.

[1bwana1]

Nick,
I agree, since they are giving us the data logger tool, they should give us an idea of what number ranges for each attribute is acceptable, and optimal. If I remember right the frame rate is like 20 milliseconds. If that is even close, there are millions of frames sent in 14 minutes, so 132 is probably an insignificant number. I have heard that in a good setup, a couple of hundred fades on each RX is pretty normal. Any holds indicate a problem. So I am thinking we should change the position and orientation on the RX's to get those numbers down.

Of course this info is not from JR directly. Once again, I thing they should give us some guidance on this subject.

[rede2fly]

great reading guys but, after reading all this i think i will wait for a year or 2 to see if most of the bugs are worked out. i would really be pissed to loose one of my planes due to lock out. but keep the info comming

[Flyinrazrback]

Does the X9303 come with a dsc cord or such to link up 2 9303s to copy models from one to another?

[airborneSGT]

Whats the big difference in using the module vs. the ground up system vs. the slight speed penalty? I am curious to see if the dedicated 2.4 works any better in practice than the module.

[Tailwind]

On the Data logger Instructions they say up to 500 on the ant, and 20 on the frame losses are acceptable numbers.

[GooseF22]

Just a few thoughts, dont know about validy, just brainstorming....

-Bind it to another transmitter and see if you get drops like you did with this one on the ground.
-try elevating the receiver above the power expander with foam and velcro
-disconnect the rudder servos and range check to see if you are getting any interference from the tray/stacked setup or wiring. PE should filter it.
-were the dropouts on the range check motor off? I assume yes.
-Test at a different location
-Lay the antenna sideways on the TX
-maybe try a nickle pack just for testing and turn off the regulators plugged right into the rx and see
-
i will think about it some more...Im stumped..
g

[madmax]

Regarding the A,B,L&R fade numbers -- I regularly see up wards of 350 fades per 15 minute flight, varying per antenna. I've been told these numbers are perfectly acceptable, and can be improved through antenna positioning to get the numbers down. Frame loss numbers are acceptable as well. There are millions of frames/packets transfered per flight. Don't get freaked out about that. However the numbers are all closely tied together. This is why diversity antennas are soooooo important with the 2.4 stuff. Don't let anyone tell you otherwise.

You should -never- see a hold, that's not good. Can you post a photo of TA's install?

Steve, push your receiver as far forward as you can get it on the PowerExpander. Get the antenna well in front of the deans connector.

Walex - your setup looks great from a positioning point of view, however I would take a closer look at your battery setup. How many servos are you running? Is that the stock 1500 that came with the 9303?

Brownouts are an issue, and properly powering 2.4 gear is absolutely 100% essential. Inferior ESC's as a receiver power source on electrics can cause big time problems. The reason for the 3-4 second lag after a re-boot is that the receiver is scanning for channels on power up. From my understanding, in the future these systems will "remember" the last channel that a link was established, and immediately re-connect, drastically reducing the power up time in the case of a voltage drop. There are also a few excellent soon to be released products from a couple of manufacturers which will alleviate these issues.

In the past 12 months, I've completely swapped all 72 for 2.4 with zero issues. Just keep 'em powered properly, and you're a-okay.

[GooseF22]

YESSSS. someone listened, hopefully a shock absorber for voltage dips.

excellent points max. I have been stuck over here all summer and havent been able to mess with the 9000 yet with a data logger.....YET... I will be messing with it on my tuna boat this winter and the jet if the $$$holds up.

[Extra 1]

Max and others:
I have modified as follows the 2.4 installation in my 260:

Raised the AB receiver up and forward away from the Deans plugs and wire.
Moved and repositioned the L and R satelite receivers.
Will be testing tomorrow and will report results.

Tim Attaway

[bodywerks]

good deal. Keep us informed.
I, too, have a PE Pro, and I plan to mount the rx on top of about 1.5" of Depron to get the main antennas away from the PE circuit board and Deans plugs. I think that may be a source of your problems right there. I also have decided to ditch regulators to ensure a smooth flow of power.

[Flyinrazrback]

I have 150+ flights on my module based 2.4 system in a 9303, split between a dalton 260 and a comp arf mx2. Zero problems with it. I just bought the X9303 to replace it for the extra options and will be swapping it out tommorow and doing some flying with it.