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Radio - Servo - Gyro - Gov - Batt > TX/RX eCCPM Latency Test Results
 
 
Helinutnz
Elite Veteran
Location: below 42 South

oh god i think I just spun in. What the hell does it all mean for those of us that are not rocket scientists?

Can you list those radios and in simple terms tell us from 1 to 10....(1 being the best and ten being the worst) radios in terms of operating speed.
05-21-2008 12:02 PM
 
 
Razmo
Key Veteran
Location: Chicago

Guys,

Can anyone confirm whether this is true..

Spektrum tells me that every DSM2 receiver provides 2048 resolution when paired with a JR/Spektrum Transmitter that offers 2048 resolution.

True or false?

Thanks,
Raz
06-04-2008 12:46 AM
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

I was told you only get 2048 with an AR9000 or higher receiver paired with the X9303 or 12X.

- John

Protos -- Logo 10
06-04-2008 01:56 AM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

I went to the SpektrumRC.com site and searched for Resolution, 2048 and 1024 individualy and got nothing.

I snooped around and finally found
Quote 
Unlike most first-of-its-kind innovations, DSM2™ is not an unproven concept. It is based on the exact same Spektrum 2.4GHz DSM® (Digital Spectrum Modulation) that RC car racers as well as micro electric and parkflyer modelers have been enjoying for at least two years now. Like DSM, DSM2 provides an impenetrable radio link that’s immune to every known type of RC interference. And because it operates at 1024 bit resolution, it provides the kind of locked-in response that will have you feeling more connected to your model than ever before.
The conclusion being that Spektrum DOES NOT handle 2048 resolution. And that "locked-in response" is more low latency than resolution.

I did find a vendor site that claimed that the X9303 when used with the JR921 RX gives 2048 resolution. Makes me question if their AR9000 is in fact the same thing as the 921 ?

Too bad they're not forthcoming with clear answers. Like their less than timely answer to the low voltage reboot problem.

I'm not too suprised that Spektrum refuses to provide clear details on their resolution. When they did on the DX6, they lied. Now they simply won't talk about it . . . . at all.
06-04-2008 02:17 AM
HOMEPAGE  
 
 
Razmo
Key Veteran
Location: Chicago

Yeah, I think I had a rookie tech (same guy twice)

I'm also hearing the new AR7100 and AR7100R provide 2048. Sounds about right?

Raz
06-04-2008 02:18 AM
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

> Now they simply won't talk about it . . . . at all.

That's not the case at all. It has been clearly stated the the X9303 with the AR9000/R921 is 2048. It has been clearly stated that the 12X with the AR9000/R921, and R1221 is 2048.

- John

Protos -- Logo 10
06-04-2008 02:26 AM
 
 
marked23
Key Veteran
Location: Lynnwood, WA

Would you expect different latency numbers with the 12X paired with the AR7000?

-Mark
06-04-2008 02:40 AM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

Quote 
It has been clearly stated . . . .
Where ? By Spektrum ?

Can you give a link to the Spektrum site where they clarify that ?
06-04-2008 02:43 AM
HOMEPAGE  
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

> Where ?

In adds for both radios and the manuals for each.

> By Spektrum ?

No. Since both the X9303 and 12X are JR branded, it was JR/Horizon Hobby.

> Can you give a link to the Spektrum site where they clarify that ?

Why would it be on the Spektrum site since the radios are JR branded? Anyways, here's one for the X9303: http://www.hangar-9.com/Articles/Ar...?ArticleID=1762. The 12X info is in the adds for the radio.

- John

Protos -- Logo 10
06-04-2008 02:56 AM
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

> Would you expect different latency numbers with the 12X paired with
> the AR7000?

No, not of any significance.

- John

Protos -- Logo 10
06-04-2008 02:57 AM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

What I find more than curious is that Spektrum simply doesn't feel the need to spell out the details of their technology when at the same time they're spending so much effort to advertise and sell said technology.

Why do we have to rely on 3rd party sources for those details ? ?

It's a bit like Micorsoft . . . .they're chock-full-o-problems but why should they care since people keep throwing money at them for the product.
06-04-2008 03:29 PM
HOMEPAGE  
 
 
Ace Dude
Elite Veteran
Location: USA

Quote 
What I find more than curious is that Spektrum simply doesn't feel the need to spell out the details of their technology when at the same time they're spending so much effort to advertise and sell said technology.

What's the big surprise? It's business and it's called proprietary technology. They are in business to make money and 95% of the modelers out there don't understand it anyway. Thus, why give away your secrets or spend writing white papers 95% or more modelers don't care about.

I'm not saying I agree with it (I'm a techie), that's just the way business works.



06-04-2008 04:21 PM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

I'm not talking about the inner workings of their so called DSM2 or those kind of details. I'm talking about simple things like which units have what resolution and possibly what the latencies are.

Maybe Spektrum thinks all their customers are not smart enough to understand those kind of things ?
06-04-2008 04:28 PM
HOMEPAGE  
 
 
Razmo
Key Veteran
Location: Chicago

I don't mean to create a debate here, but I feel AirWolffRC has a point.

I feel it would be better business to be forthcoming about your technology versus being ambigious. The reason, customers make the world go round and their understanding is essential to progressive growth. Spektrum isn't stopping the competative threat by being ambigious, they are creating problems. There is no stopping competition.

Once again, I don't mean to argue here, just wanted to make some sense of it.

Raz
06-04-2008 04:33 PM
 
 
Ace Dude
Elite Veteran
Location: USA

Quote 
I'm not talking about the inner workings of their so called DSM2 or those kind of details. I'm talking about simple things like which units have what resolution and possibly what the latencies are.

Maybe Spektrum thinks all their customers are not smart enough to understand those kind of things ?

Agreed. They should be more forthcoming on general product features and specifications.



06-04-2008 04:54 PM
 
 
Harris
Senior Heliman
Location: A Greek in Cyprus

Quote 
I'm not talking about the inner workings of their so called DSM2 or those kind of details. I'm talking about simple things like which units have what resolution and possibly what the latencies are.

Maybe Spektrum thinks all their customers are not smart enough to understand those kind of things ?

Or maybe they are trying to avoid direct comparisons with the competition...
06-04-2008 07:34 PM
HOMEPAGE  
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

If they really believed their product was better, that wouldn't be a concern.
06-04-2008 08:23 PM
HOMEPAGE  
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

Hmm, let's see... They sell every unit they can manufacture without providing any more details than they do. Why would a business want to give any further details if it is blatantly obvious the consumer doesn't really care?

- John

Protos -- Logo 10
06-04-2008 10:19 PM
 
 
Eco8gator
Key Veteran
Location: Palm Beach Gardens, FL

Curious, about the locked in feel...

I too have gotten into debates about this. But I think its the lower latency that people feel, not so much the resolution. Im pretty sure people would prefer the feel of 1024 resolution with <10ms of latency vs a >60ms latency with 4096 resolution.

C
06-04-2008 10:23 PM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

JKos,
Am I correct in observing that you support Spektrum's callus attitude ?

When I deal with a company, I like to feel that they are at least as interested in the product as they are in taking my money.
06-04-2008 10:27 PM
HOMEPAGE  
 
 
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Radio - Servo - Gyro - Gov - Batt > TX/RX eCCPM Latency Test Results
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