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2.4G JR Radios JR 2.4 Gigahertz Radios and Technology


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Old 09-14-2011, 09:01 PM   #21 (permalink)
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Not as fast as a DX7 or DX8 or 8FG, but I still like mine alot.

I have a DX8 which is supposed to be as fast as a DX7, but it may be a while before I trust it again. It's back from service and my kids are using it on their foamies.

It would appear that the new JR's (not sold in the US) could be every bit as fast as the DX7 and DX8, but HH isn't importing them because of the competing communication protocol.
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Old 09-15-2011, 05:42 PM   #22 (permalink)
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I wonder if the new JR Protocol is even legal to use in the U.S.?

Has the FCC approved it?

If not, would AMA coverage apply?

Also wonder what the output wattage is.

If it's JR, I am sure it will be good, I am just curious.
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Old 10-19-2012, 08:06 PM   #23 (permalink)
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Lets see xg8 compared to the rest.
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Old 11-12-2012, 01:19 PM   #24 (permalink)
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Quote:
Originally Posted by hobdean View Post
Lets see xg8 compared to the rest.
+1
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Old 11-27-2012, 01:27 AM   #25 (permalink)
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XG series DMSS protocol has nearly zero latency and the important channels get transmitted and received together and at the same time, so zero latency for those.

See http://www.jrpropo.co.jp/english/pro...hats_dmss.html

Normal DSMJ and others



DMSS technology

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Old 12-30-2012, 12:43 AM   #26 (permalink)
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Quote:
Originally Posted by jointer View Post
Anyone found or measured latency of the new XG7/XG8?
I am looking for replacing my DX7, i do not need advanced radio, so the XG7 could be an option, because it have the same case like DX7.
Just for info, i measured the DX7, the numbers are right, 25-30ms average, but we measured on the digital output of Spektrum sattelite.
And also measured Jeti Duplex module in Graupner MX-22 or MC-22 (not sure which one it was).
Duplex have about 22ms latency between TX input and RX output, but the radio have another 20-25ms (from stick to PPM output, which the Duplex use).
According to jr the latency is zero.
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Old 12-30-2012, 07:22 AM   #27 (permalink)
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Phantom, the DX7 is showing average 27.5ms latency against a 22ms frame rate while the DX7se has an 11ms frame rate, so there should be quite a difference from the X9303 if we're talking about swash responsiveness.

I believe the DX7 can send all 7 channels every frame, but the DX7se sends all the swash channels every frame while other channels are only sent every other frame to get the package small enough to transmit every 11ms.

Sent from my Galaxy S2 using Tapatalk 2.

EDIT: Was viewing from my phone and didn't realize I was responding to a post that's almost two years old...Doh!
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Old 12-30-2012, 07:25 AM   #28 (permalink)
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There is always latency.
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Old 09-14-2014, 05:29 AM   #29 (permalink)
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Quote:
Originally Posted by DominicD View Post
There is always latency.
If the measuring equipment can only go down to 1ms and the latency is lower than 0.5ms then it's considered 0.

Anyway people like to think they could feel latency in the single digits even though humans have a reaction time in the hundreds of ms...
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Old 09-14-2014, 04:17 PM   #30 (permalink)
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Alittle late to the party.
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Old 09-14-2014, 04:29 PM   #31 (permalink)
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It's never too late to correct mistakes and flaws in thinking...
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Old 09-14-2014, 06:52 PM   #32 (permalink)
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Quote:
Originally Posted by TheKingPhisher View Post
If the measuring equipment can only go down to 1ms and the latency is lower than 0.5ms then it's considered 0.

Anyway people like to think they could feel latency in the single digits even though humans have a reaction time in the hundreds of ms...
Quote:
Originally Posted by TheKingPhisher View Post
It's never too late to correct mistakes and flaws in thinking...
Ok, if you feel like being argumentative over a 2 year old thread then please explain how less then 0.5ms is equal to zero.
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Old 09-14-2014, 07:57 PM   #33 (permalink)
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I didn't say it's equal to zero...I said since it's so tiny it could be considered zero. It's called rounding up/down...maybe you've heard of it?...

Why don't you actually read and understand what you quote instead of creating a strawman...
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Old 09-14-2014, 08:06 PM   #34 (permalink)
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Quote:
Originally Posted by DominicD View Post
There is always latency.
There is always latency, therefore a latency greater than zero. So what part of this is incorrect to warrant calling out something I posted about 2 years ago ?

What governing body decided that 0.5ms was low enough to just consider zero ? I agree it is well below human perception, but that doesn't mean it doesn't exist .... which I alluded to in my 2 year old post.

What exactly was the point of your post ? I mention that latency will always exist, this is such a fundamentally basic concept of communication, I make no mention of the measurement procedure or human perception. You then dig up a very old thread to basically add your own 2 cents that add nothing to the thread.
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Old 09-14-2014, 08:43 PM   #35 (permalink)
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I don't need a standards body to back up what I said...you either take it or leave it...or continue your strawman "there is always latency"...really Captain Obvious?

Nobody actually cares about "there is always latency"...

What people actually care about is how small the latency has been reduced compared to the other radio systems. That's what's important and tangible...not some stupid obvious statement like "the sky is blue"....

What does that actually contribute to the topic? Nothing....
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