Independent tests prove lack of frequency hopping with XPS - Page 68

dick hanson · 03-20-2008, 08:50 AM

	Quote: Originally Posted by Daemon
	For whatever it's worth, Spektrum can change channels in flight. It's easy. Switch the Tx off and back on. It'll scan for new channels every time. The Rx will lose the link for about 1 second, and then start scanning for whatever new channels the Tx is on and re-link, which usually takes less than 2 seconds on anything but the AR6100 Rx (which based on my testing may simply fall from the sky, before link is re-established ) ian

I misunderstood the original comments - yeh -I have also done the power off/on in flight - an absolutely stupid thing to do as it may and like will crash a model.
I was thinking of trying to switch to a new "Model code" in flight - Don't be so hard on the 6100! get a new one -try your tests again.

Costas · 03-20-2008, 10:05 PM

	Quote: Originally Posted by erichevy
	If I turn my radio off/on too quick it can take up to 10 15 minutes to re-bind!!

Turning the Tx On/Off is not really a good test as the Tx module actually needs to boot up before it scans and transmits. Firmware could be changed so that the module could rescan and retransmit on a new pair of channels and that would be a lot quicker.

Mind you 10 to 15 minutes sounds odd. My Spektrum module installed in my 10X only takes less than about 5 seconds to rebind when I switch it on then off at the Tx.

Is it possible that you have some other 2.4GHz radio sources (non RC) in the close vicinty?

Daemon · 03-20-2008, 11:56 PM

	Quote: Originally Posted by dick hanson
	Don't be so hard on the 6100! get a new one -try your tests again.

Someone (Rob Hair) over on RCG confirmed that the low-power reboot/re-link is fast with
the newest firmware AR6100, but that the "long time" (about 1 second) loss of signal re-link time
is unchanged, and is still very slow compared to any of the other Spektrum Rxs.
Pretty sure the difference is that it's the only with only one Rf receiver, AR6000 (DSM1), and AR7000 (DSM2)
and others all have more than one. I think that when they scan, they keep one
receiver on the old channel pair, while the other receiver scans, so if the signal returns
on the old channels, it can hot link immediately. The AR6100 only has one Rx
and it can either listen on one pair of channels, or scan for new ones but not both,
thus the slow re-link time.

ian

Daemon · 03-20-2008, 11:58 PM

	Quote: Originally Posted by Costas
	Mind you 10 to 15 minutes sounds odd. My Spektrum module installed in my 10X only takes less than about 5 seconds to rebind when I switch it on then off at the Tx.

I'm guessing he meant 10-15 seconds, and if he happens to be using the AR6100 Rx
with his module then 10-15 seconds is very possible.

[edit]See latest post here http://www.rcgroups.com/forums/showt...=8#post9395025
New firmware, same results.

ian

erichevy · 03-21-2008, 04:54 AM

No,
I really meant 10 to 15 minutes.
I did this test when I bought my spektrum equipment new, a tm8 module for my 9c radio and 5 AR9000 recievers.
You realy can't tell how long every time it's going to be when switched off/on quick because it differs, between a minute and sometimes as long as 15 minutes.
Meanwhile the led in the module is blinking.
Btw, this has nothing to do with quick connect, which is tested by switching the reciever power off/on and not the radio.
It is no problem to me anymore, because I know now this "side" effect will happen, and will avoid a quick off/on switching because of that.
The quickly swichting off/on is never needed, and must be avoided (NEVER DO THIS WITH FUTABA fasst) but I know now what it will do with my equipment, and because of this, I thought I mention/warn you not to do this while flying, hoping to find a new channel in flight!

But now I am curious what you're Spektrum equipment will do when you switch you're radio off/on quick?? (with reciever turned on )
I do not think this is only happening to me!

Eric.

erichevy · 03-21-2008, 06:50 AM

I did the radio off/on test again..
Hmmm. now it "only takes 5 to 10 seconds everytime again.

What had happened was that one AR7000 reciever at the time was acting up.
And the binding was doing weird things at that time.
Maybe this was the result of it taking a very long time to re-bind after switching off and on of the radio?
As if the bad reciever was influencing the sending module??, it was acting up (the long binding time) on all 5 of my AR9000 recievers!
When I send that AR7000 in for garantee and asked for a AR9000 instead this long binding effect has not been there anymore.
I just did find this out by testing it again now.
My "input" was to warn you not to do the switching while flying because of this.
But I'am still very curious wether it can happen with someone else?

Eric.

KrisW · 03-21-2008, 06:54 AM

	Quote: Originally Posted by erichevy
	No, I really meant 10 to 15 minutes. I did this test when I bought my spektrum equipment new, a tm8 module for my 9c radio and 5 AR9000 recievers. You realy can't tell how long every time it's going to be when switched off/on quick because it differs, between a minute and sometimes as long as 15 minutes. Meanwhile the led in the module is blinking. Btw, this has nothing to do with quick connect, which is tested by switching the reciever power off/on and not the radio. It is no problem to me anymore, because I know now this "side" effect will happen, and will avoid a quick off/on switching because of that. The quickly swichting off/on is never needed, and must be avoided (NEVER DO THIS WITH FUTABA fasst) but I know now what it will do with my equipment, and because of this, I thought I mention/warn you not to do this while flying, hoping to find a new channel in flight! But now I am curious what you're Spektrum equipment will do when you switch you're radio off/on quick?? (with reciever turned on ) I do not think this is only happening to me! Eric.

Actually it is possible to MAKE your receivers do weird things, if you goofball the binding segment of a spektrum. I accidentaly hooked my Fight Log to the bind port instead of the Data port. After that, whenever I'd turn either the RX or TX off, 3 of the 4 satellites would start flashing after power up, and although the 4th had a solid LED (it was on the (A) channel for the satellites), the controls remained locked. Either the RX or TX losing power would cause this .. BUT. . if I turned both of them off, and then turned the TX on, followed by the RX, all 4 would re-link properly and I'd have control again.

I solved it by first kicking myself in the butt for being stupid, then going through the bind procedure (PROPERLY) again. After that everything was fine. I intentionally repeated the goof move of plugging the Flight Log into the bind port, and the receiver again had the same responses while doing power off-on of either the TX or RX. Now, why the (A) satellite LED remained solidly lit is a mystery, especially since the receiver went into lockout and the other 3 satellites were flashing. Perhaps the AR9100 regards it as an afterthought compared to the 3 primary satellites?

Isn't technology wonderful???

KrisW · 03-21-2008, 07:08 AM

	Quote: Originally Posted by erichevy
	I did the radio off/on test again.. Hmmm. now it "only takes 5 to 10 seconds everytime again. Eric.

Hey Eric, beign that you are from the Netherlands. . . are the girls in your Avatar dressed like that to help model RC products. . . or something else??

dick hanson · 03-21-2008, 10:23 AM

	Quote: Originally Posted by erichevy
	No, I really meant 10 to 15 minutes. I did this test when I bought my spektrum equipment new, a tm8 module for my 9c radio and 5 AR9000 recievers. You realy can't tell how long every time it's going to be when switched off/on quick because it differs, between a minute and sometimes as long as 15 minutes. Meanwhile the led in the module is blinking. Btw, this has nothing to do with quick connect, which is tested by switching the reciever power off/on and not the radio. It is no problem to me anymore, because I know now this "side" effect will happen, and will avoid a quick off/on switching because of that. The quickly swichting off/on is never needed, and must be avoided (NEVER DO THIS WITH FUTABA fasst) but I know now what it will do with my equipment, and because of this, I thought I mention/warn you not to do this while flying, hoping to find a new channel in flight! But now I am curious what you're Spektrum equipment will do when you switch you're radio off/on quick?? (with reciever turned on ) I do not think this is only happening to me! Eric.

A little side note here --on technology--
I have the DX6i--as well as the 9303 -.
In puttering with the tx, you will note that when switched on -then off-- the DX6i, displays the comment " saving data"--THEN shuts it'sself off.
The 9303 when switched off - shows a horizontal line on the screen for a few moments - then the line fades out
this is the same thing --that is -the tx is saving data -then turning off.
Exactly the same thing happens on a computer - --You select "turn off or restart" then the computer saves all your naughty pictures and THEN turns off.
This step in computer technology is neither new or expensive ( note ,the DX61 has it)
Why Futaba has a "be careful on turn off" approach - is a real mystery to me - But in that I don't fly Futaba anymore -it is not a concern. Maybe it is no issue with Futaba guys - OK also.
Now back to the switching quickly OFF n ON with the DSM2 system.
One: Don't do it whilst flying
Two

on't do it whilst flying
Three: Don't do it whilst flying.
But if you do do it -please let me know how it works out -- My own fiddling on the bench shows a quick reconnect - -but not good enough for me.
Irrespective of the system used (2.4)- The time lapse may be enough to confuse the RX and cause things to "start UP" not simply reconnect.
So far I will await the results of others on this.

**Kiwi** · 03-21-2008, 07:58 PM

****You select "turn off or restart" then the computer saves all your naughty pictures and THEN turns off.****

And just how would you know that Dick????

KrisW · 03-21-2008, 08:27 PM

	Quote: Originally Posted by Kiwi
	**You select "turn off or restart" then the computer saves all your naughty pictures and THEN turns off.** And just how would you know that Dick????

Dick's an OLDE guy, Kiwi. . he NEEDS the dirty pictures. . .Personally, I just rely on my pornographic memory. . . . . . . .

dick hanson · 03-21-2008, 09:59 PM

	Quote: Originally Posted by Kiwi
	**You select "turn off or restart" then the computer saves all your naughty pictures and THEN turns off.** And just how would you know that Dick????

Just using an example even the kiddies could understand .
seriously - I was surprised that this feature was not built into other manufacturers' computer type radios.

03-21-2008, 04:54 AM	#809 (permalink)
erichevy Flyin' Around Join Date: May 2007 Location: Zevenhoven The Netherlands Posts: 10	Re: Independent tests prove lack of frequency hopping with XPS No, I really meant 10 to 15 minutes. I did this test when I bought my spektrum equipment new, a tm8 module for my 9c radio and 5 AR9000 recievers. You realy can't tell how long every time it's going to be when switched off/on quick because it differs, between a minute and sometimes as long as 15 minutes. Meanwhile the led in the module is blinking. Btw, this has nothing to do with quick connect, which is tested by switching the reciever power off/on and not the radio. It is no problem to me anymore, because I know now this "side" effect will happen, and will avoid a quick off/on switching because of that. The quickly swichting off/on is never needed, and must be avoided (NEVER DO THIS WITH FUTABA fasst) but I know now what it will do with my equipment, and because of this, I thought I mention/warn you not to do this while flying, hoping to find a new channel in flight! But now I am curious what you're Spektrum equipment will do when you switch you're radio off/on quick?? (with reciever turned on ) I do not think this is only happening to me! Eric. Last edited by erichevy; 03-21-2008 at 05:23 AM.

03-21-2008, 06:50 AM	#810 (permalink)
erichevy Flyin' Around Join Date: May 2007 Location: Zevenhoven The Netherlands Posts: 10	Re: Independent tests prove lack of frequency hopping with XPS I did the radio off/on test again.. Hmmm. now it "only takes 5 to 10 seconds everytime again. What had happened was that one AR7000 reciever at the time was acting up. And the binding was doing weird things at that time. Maybe this was the result of it taking a very long time to re-bind after switching off and on of the radio? As if the bad reciever was influencing the sending module??, it was acting up (the long binding time) on all 5 of my AR9000 recievers! When I send that AR7000 in for garantee and asked for a AR9000 instead this long binding effect has not been there anymore. I just did find this out by testing it again now. My "input" was to warn you not to do the switching while flying because of this. But I'am still very curious wether it can happen with someone else? Eric.

03-21-2008, 07:58 PM	#814 (permalink)
Kiwi Bad-ass Super Contributer! Join Date: Jan 2006 Location: Chile Age: 55 Posts: 4,791 Blog Entries: 4 Awards Showcase Total Awards: 2	Re: Independent tests prove lack of frequency hopping with XPS **You select "turn off or restart" then the computer saves all your naughty pictures and THEN turns off. And just how would you know that Dick???? __________________ Kiwi** www.crackroll.com


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