JR-9303 2.4 Field Results

[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.

[madmax]

Thanks Mr. Attaway! Hope this thread helps. Remember to re-bind that puppy after changing any trimming!

SGT, the native DSM2 stuff is pretty awesome, and noticibly faster when sitting on the ground. The module approach has been a good stopgap during the period of time when we're waiting for the high end 2.4 radios from Futaba and JR to surface. Using the module was kinda like installing Windows Vista on a 3 year old computer. It works great, but you still have the old video card, less than optimal memory, and lower capacity hard drives - it makes you want to upgrade. Horrible analogy, but that's all I got .

[dick hanson]

Q--why would you rebind after changing the trims on the face of the tx?
A - IF you switch aircraft and leave same model on the tx.-trims as well as all setups ( throws reverse mix etc,,)will have to be changed for another model.-just like an y simple single model type tx.
otherwise --the tx does remember tx face trims just as it did when the 72 module was in it
At least all my 10JR versions and 9303 did.
My DX 7 also does this but -if sub trims are changed after binding - then rebind is advised
did I miss something here?

[madmax]

Mr. Hanson, I'm guilty of posting stuff sometimes when I think everyone else knows the mysterious thoughts in my head when I'm writing. My bad Hope this helps everyone who is reading.

Yes, of course the TX remembers all the trims to make the plane fly straight. But desired failsafe deflection is "learned" by the RX during the binding process. It's important to re-bind after trimming or making mechanical linkage changes so the RX can learn the new "neutral" location of the control surfaces.

Ask Leseberg, he re-binds many times a week.

A word on failsafe. With the 9303, you can now program 2 types of failsafe (covered in our review). These are new features of the AR9000 and RS921 RX's. This is important stuff, and a bit of a learning curve for folks thinking of migrating to 2.4/Spektrum.

- Smartsafe and Pre-set failsafe. Smartsafe throws all servos into "hold" and puts the throttle into a pre-determined failsafe position during loss of comm.

- "Pre-set" failsafe drives all servos into the position they were in when binding occured during loss of comm.

Here's an excerpt from the manual: