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HelicopterRadio - Spektrum DSM › Spektrum's new DSMX
02-17-2011 12:15 AM  6 years agoPost 321
Smacka

rrApprentice

PA

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Well, don't that beat all. This video is a "crime of opportunity"

@ TM...yep, too funny

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02-17-2011 12:17 AM  6 years agoPost 322
Smacka

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PA

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Helismash...no worries, you are most welcome. T. Moore actually brought this product to my attention a few posts ago in this thread

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02-17-2011 01:50 AM  6 years agoPost 323
jadams

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East coast USA

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go Futaba go...nice video, can't for rectums response.

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02-17-2011 01:59 AM  6 years agoPost 324
Adam Henley

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Puyallup, WA. USA

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Isn't this a JR/spektrum forum? Make fun of spektrum in the fartaba forum

J/K I like both companies actually. I have owned both but only 2.4 on spectrum and JR. I prefer the idea of satellite receivers. Just makes sense to me. Can anyone explain why futaba doesn't use them?

I've never met a helicopter I didn't like :)

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02-17-2011 02:13 AM  6 years agoPost 325
Tyler

rrElite Veteran

Chicagoland area

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Remote Receivers

Futaba, Sanwa, Hitec don't need remote receivers, so they don't use em. Satellite rx's are just a bandaid, arguably.

Spektrum did attempt to make a rx using two antenna leads like the competition for use in carbon glider fuselages, but it didn't perform like the others in its class.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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02-17-2011 02:24 AM  6 years agoPost 326
TMoore

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Cookeville, TN

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The only way that video could be funnier was if they had the Geico shrink in that chair.

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02-17-2011 02:51 AM  6 years agoPost 327
Adam Henley

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Puyallup, WA. USA

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Futaba, Sanwa, Hitec don't need remote receivers, so they don't use em
Uh was hoping for a more technical explanation

I've never met a helicopter I didn't like :)

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02-17-2011 02:54 AM  6 years agoPost 328
Tyler

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Chicagoland area

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How much technical is needed? KISS?

Enjoy things that money can buy IF you don't lose the things money can't buy.

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02-17-2011 03:12 AM  6 years agoPost 329
Santiago P

rrProfessor

South West, Ohio

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Gunny vs Spek

The only way that video could be funnier was if they had the Geico shrink in that chair.
Spek: and every time I go to a big event I become sad with all the signal saturation.

Gunny: You know what makes me sad, YOU DO! MAYBE WE COULD GO TO MAMBY PAMBY DSM LAND, OR MAYBE WE COULD GIVE YOU AN UPGRADE, OR CRAM YOU WITH MORE SATELITES, YOU JACKWAGON.
Crybaby!

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02-17-2011 03:15 AM  6 years agoPost 330
TMoore

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Cookeville, TN

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That's funny right there.

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02-17-2011 03:25 AM  6 years agoPost 331
helo_chris

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goodlettsville, tn

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HAHAHA. Thats exactly what I was thinking when I read that. Gunny would make short work of that session!

"There is a fine line between cutting edge and bleeding edge.."

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02-17-2011 03:43 AM  6 years agoPost 332
Adam Henley

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Puyallup, WA. USA

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Well I do subscribe to KISS, however, there is nothing simple about radio technology. Radio waves are polarized. Either you account for that or you don't. I want to know how futaba gets along "seemingly" without designing for this.

I've never met a helicopter I didn't like :)

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02-17-2011 03:57 AM  6 years agoPost 333
TMoore

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Cookeville, TN

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Well I do subscribe to KISS, however, there is nothing simple about radio technology. Radio waves are polarized. Either you account for that or you don't. I want to know how futaba gets along "seemingly" without designing for this.
Frequency Hoppers don't need multiple satellite Receivers because the tech doesn't requre it like DSM2 tech does. If you tried to run DSM2 with no satellites you have a park flyer rx with limited range. FHSS rigs just need two antennas placed 90 degrees apart in any plane to have adequate sensitivity and ample gain for the task since in the case of FHSS-3 from Sanwa the system is hopping up and down the band in a pseudorandom pattern at a high rate and the RX is never looking at one channel for more than 40ms or so. Up until DSMX their tech only hung onto two channels the entire time so satellites were a way to maintain ample gain and feed the RX with enough of a signal to maintain control and hopefully do it in a crowded situation.

TM

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02-17-2011 04:50 AM  6 years agoPost 334
Adam Henley

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Puyallup, WA. USA

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Ok. That makes sense I guess thanks

I've never met a helicopter I didn't like :)

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02-17-2011 05:42 AM  6 years agoPost 335
drdot

rrElite Veteran

So. California,​Orange County.

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fwiw..

At the risk of repeating myself....
I was Spektrum before Spektrum was cool...Used to fly a 600 E with an old 6000 Parkflyer rx buried under the battery, between the aluminum frame halves...Could fly it just about out of sight (20/15, thanks to Lasik...)... But not above 400', if Big Brother is watching...
NEVER a glitch, a twitch, or a brownout....Now thousands of flights and several years later....Several Spektrum TXs, many various Spektrum rxs,
Lotsa helis, ALL belt drive...Still the same..

I've had one lockout in the last three years..With a Futaba FASST system....

Any of these systems can fail, for many reasons...A fh system may provide some redundancy, but the original SS works just fine...

John.

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02-17-2011 05:48 AM  6 years agoPost 336
Havoc

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Ky.

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Frequency Hoppers don't need multiple satellite Receivers because the tech doesn't requre it like DSM2 tech does. If you tried to run DSM2 with no satellites you have a park flyer rx with limited range. FHSS rigs just need two antennas placed 90 degrees apart in any plane to have adequate sensitivity and ample gain for the task
But Futaba doesn't use FHSS. They are frequency hopping DSSS. So then what you are saying suggests they should have multiple satellites to the extent that JR/Spektrum needs it. Why do I suspect you are just leading up to an argument for Airtronics and using Futaba to triangulate?

Personally, I don't trust any of them. I want a box that tells me what the RX is seeing and I want the redundancy of more than one RX. I don't care if "you don't need that with our system". I don't care about what I "need" in this hobby. I need water, food, and shelter. I care about what I want.

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02-17-2011 06:29 AM  6 years agoPost 337
JasonJ

rrKey Veteran

North Idaho

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Frequency Hoppers don't need multiple satellite Receivers because the tech doesn't requre it like DSM2 tech does. If you tried to run DSM2 with no satellites you have a park flyer rx with limited range. FHSS rigs just need two antennas placed 90 degrees apart in any plane to have adequate sensitivity and ample gain for the task since in the case of FHSS-3 from Sanwa the system is hopping up and down the band in a pseudorandom pattern at a high rate and the RX is never looking at one channel for more than 40ms or so. Up until DSMX their tech only hung onto two channels the entire time so satellites were a way to maintain ample gain and feed the RX with enough of a signal to maintain control and hopefully do it in a crowded situation.

TM
Okay, I'm calling just a hint of bs. Not because this is wrong, because it is not wrong. It is because of the reason you are saying Spektrum uses satellites. You need to have spacing between the two antennas. Futaba does it with the antennas on the ends of extensions. Spektrum does it with satellites. You need the spacing because of potential blockage by carbon frames or metal parts. You also need the spacing because of reflections, especially in applications such as Giant scale Gassers. Without spacing, the reflected signal off of, say, that DA 110 can cancel out the direct signal. I suspect the Futaba system is less affected by reflections due to it's signal structure, but it is not immune to signal blockage. Having distance between the antennas is needed for any 2.4 system to be considered full range. Are there any 2.4 full range systems out there that use one antenna?

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02-17-2011 09:54 AM  6 years agoPost 338
DS 8717

rrProfessor

Here wishing i was​somewhere else

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Frequency Hoppers don't need multiple satellite Receivers because the tech doesn't requre it like DSM2 tech does. If you tried to run DSM2 with no satellites you have a park flyer rx with limited range.
This is not true,my 7600 can be used without a satelite reciever. Not that i would do it but it it is capable.....

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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02-17-2011 10:05 AM  6 years agoPost 339
alfred

rrVeteran

Australia, New South​Wales, Mid North​Coast

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Are there any 2.4 full range systems out there that use one antenna?
I think XPS is/was using a single collinear, the one sticking on top of the RX.

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02-17-2011 10:08 AM  6 years agoPost 340
DS 8717

rrProfessor

Here wishing i was​somewhere else

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The main reciever on the 7600 has only one antenna,it can be used without the satelite reciever.

http://www.readyheli.com/SPMAR7600-...er_p_35981.html

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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