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| 2.4 Ghz Spread Spectrum Technology Discuss Spektrum, Futaba FASST, and all of the exciting 2.4 transmitter/receiver technology here! |
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| | #37 (permalink) | ||||||||||||||||||
| Fly It Like You Stole It! ![]() Join Date: Jan 2006 Location: Norman, OK
Posts: 198
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ROTFLMAO nice touch
__________________ Andy Snow AMA 6972 IMAC 4860 BME Aircraft and Engine Sales LLC. Fromeco Fly It Like You Stole It!!! | ||||||||||||||||||
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| | #38 (permalink) |
| Imac.Thinking outside the box ![]() |
__________________ EXTREMEFLIGHT R/C Tech support You're just jealous because the voices only talk to me. ....IMAC, its your site! http://www.mini-iac.com/ ......North Georgia IMAC Challenge: www.southeastimac.com |
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| | #39 (permalink) | ||||||||||||||||||
| Fly It Like You Stole It! ![]() Join Date: Jan 2006 Location: Norman, OK
Posts: 198
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__________________ Andy Snow AMA 6972 IMAC 4860 BME Aircraft and Engine Sales LLC. Fromeco Fly It Like You Stole It!!! | ||||||||||||||||||
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| | #40 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() Join Date: Jan 2006 Location: NJ
Posts: 1,370
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Now with Li-ion--yes they would just hop.
__________________ Welcome to New Jersey...Where fun comes to die. | ||||||||||||||||||
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| | #41 (permalink) | ||||||||||||||||||
| Fly It Like You Stole It! ![]() Join Date: Jan 2006 Location: Norman, OK
Posts: 198
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But Li-Ions have endurance!
__________________ Andy Snow AMA 6972 IMAC 4860 BME Aircraft and Engine Sales LLC. Fromeco Fly It Like You Stole It!!! | ||||||||||||||||||
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| | #42 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() Join Date: Jan 2006 Location: NJ
Posts: 1,370
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__________________ Welcome to New Jersey...Where fun comes to die. | ||||||||||||||||||
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| | #43 (permalink) | ||||||||||||||||||
| Fly It Like You Stole It! ![]() Join Date: Jan 2006 Location: Norman, OK
Posts: 198
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LOL
__________________ Andy Snow AMA 6972 IMAC 4860 BME Aircraft and Engine Sales LLC. Fromeco Fly It Like You Stole It!!! | ||||||||||||||||||
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| | #45 (permalink) |
| Doo It! Doo It! ![]() Join Date: Mar 2006 Location: St. Louis Missouri
Posts: 81
| Beware of military radar, frequencies are classified; however fall with in the GHz range. They are very powerful and their scatter frequencies might be a problem. If you are near a military base, I would watch using a non frequency hopping system. |
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| | #46 (permalink) |
| Comin' through ![]() Join Date: Jan 2006 Location: BrisVegas, Australia Age: 35
Posts: 979
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XJet, I believe the XBee-PRO OEM module uses direct sequence spread spectrum and that it defaults to 3 retries before a packet is dropped. So would channel hopping need to be implemented on the XPS carrier board? How long does the module take to change to a different channel? And can it test a new channel for interference while still transmitting on the current channel? As a general observation, I think it's great when a product is user upgradeable via firmware revisions but the buyer should know, at the time of purchase, if they will be required to regularly update or modify their product. Some people like to tinker and others just want to "fit and forget". |
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| | #47 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() Join Date: Feb 2006 Location: New Zealand Age: 55
Posts: 791
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No, they can't perform a channel-scan while receiving data -- incoming data will be lost during the channel-scan operation. I don't recall the exact channel-change time off the top of my head but JD has said that MaxStream are modifying the firmware for him so that it can change channels more rapidly. That would mean existing users would have to return their transmitter modules and receivers for two sets of firmware updates -- one involving new code for the XPS firmware and one for the XBee/Pro firmware. Given the delays involved in just getting "in stock" items shipped, this could be a logistical nighmare. I hope he gets things sorted before spring so we don't see thousands of XPS users all waiting for their systems to be updated and returned. I also expect the cost (to XPS) could be significant if everyone decides to get their systems updated -- let's hope they have sufficient financial resources to cover that cost. However, bearing these issues in mind, I suspect XPS will strongly downplay the importance of such an upgrade -- but I wouldn't wish to risk an expensive model to a system with no frequency agility so I'd certainly recommend that people *do* get their systems upgraded when/if that option becomes available. | ||||||||||||||||||
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| | #48 (permalink) |
| If you can't HUCK it BLING IT! ![]() Join Date: Jan 2006 Location: Whidbey Island, WA Age: 34
Posts: 7,320
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Could those upgrades be made from the optical firmware device that is being finalized now that several people are testing with?
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