Info on 2.4 radio systems
09-28-2012, 02:16 PM
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Info on 2.4 radio systems
I am interested in learning more about 2.4 setups but not to sure what everything means. If someone could provide me a link or info on a good general explination I would be greatful, thanks
09-28-2012, 07:01 PM
#3
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RE: Info on 2.4 radio systems
There are guys who like to analyze things to death and get all techy about it, but there really isn't much that the end user needs to know.
1. For practical purposes, radios cannot interfere with each other or be interferred with by any external source. The 2.4ghz signal is coded so the receiver only accepts inputs from the transmitter it's bound to.
2. Brands are not compatible. Yes, they all use a similar technology, but they code their signal differently so one brand can't talk to another. There is little evidence (I'd say none that is credible) to show that one brand's style of producing the signal is better than another's. Build quality is a different matter though.
3. 2.4ghz is more durable than 72mhz. Without crystals and tuning pots, there are fewer fragile components to be damaged by temperature swings and shock.
4. 2.4ghz is easier to block than 72mhz. Your radio needs line of sight to your plane always, whereas 72mhz could go around trees and through light barriers and such. This isn't really a concern for most of us.
5. 2.4ghz is more voltage sensitive than 72mhz. In particular Spektrum equipment will reboot at 4 volts, leaving your without control for about a second (assuming that the voltage drop was just a blip). Others are more forgiving but still cannot go beneath their threshold without having to restart themselves.
6. There are basically 4 brands that produce known good quality radios that use the 2.4ghz technology (notice how I worded that): Spektrum/JR, Futaba, Hitec, and Airtronics. All have a good reputation in the hobby and stand behind their products. An honorable mention goes to Tactic, who seems to be gaining a following.
1. For practical purposes, radios cannot interfere with each other or be interferred with by any external source. The 2.4ghz signal is coded so the receiver only accepts inputs from the transmitter it's bound to.
2. Brands are not compatible. Yes, they all use a similar technology, but they code their signal differently so one brand can't talk to another. There is little evidence (I'd say none that is credible) to show that one brand's style of producing the signal is better than another's. Build quality is a different matter though.
3. 2.4ghz is more durable than 72mhz. Without crystals and tuning pots, there are fewer fragile components to be damaged by temperature swings and shock.
4. 2.4ghz is easier to block than 72mhz. Your radio needs line of sight to your plane always, whereas 72mhz could go around trees and through light barriers and such. This isn't really a concern for most of us.
5. 2.4ghz is more voltage sensitive than 72mhz. In particular Spektrum equipment will reboot at 4 volts, leaving your without control for about a second (assuming that the voltage drop was just a blip). Others are more forgiving but still cannot go beneath their threshold without having to restart themselves.
6. There are basically 4 brands that produce known good quality radios that use the 2.4ghz technology (notice how I worded that): Spektrum/JR, Futaba, Hitec, and Airtronics. All have a good reputation in the hobby and stand behind their products. An honorable mention goes to Tactic, who seems to be gaining a following.
09-29-2012, 10:20 AM
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RE: Info on 2.4 radio systems
the main thing I am talking about is I am looking at the 6 channel radio and some say FHSS system or FASST. Is one for airplanes or not, does it really matter which one you have. Thanks
09-29-2012, 02:57 PM
#8
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RE: Info on 2.4 radio systems
Yeah, don't worry at all about the terms the different manufacturers use. It's all just a fancy word for the 2.4ghz signal. FWIW, "FASST" means "Futaba Advanced Spread Spektrum Technology" and "FHSS" means "Frequency Hopping Spread Spektrum."
Oh, and "FWIW" means "For What It's Worth."
Oh, and "FWIW" means "For What It's Worth."
09-29-2012, 04:06 PM
#9
RE: Info on 2.4 radio systems
The correct answer is:
FHSS and FAAST are two different implementations by Futaba.
FHSS is less expensive to implement and its available on their less expensive systems.
http://www.futaba-rc.com/technology/fhss.html
FAAST is a little more robust but a little more expensive and comes on their higher end radios.
http://www.futaba-rc.com/technology/fasst.html
FHSS and FAAST are two different implementations by Futaba.
FHSS is less expensive to implement and its available on their less expensive systems.
http://www.futaba-rc.com/technology/fhss.html
FAAST is a little more robust but a little more expensive and comes on their higher end radios.
http://www.futaba-rc.com/technology/fasst.html
