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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › Does the R617fs put out at 2048?
08-21-2008 05:26 PM  12 years ago
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smallplanes

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Does the R617fs put out at 2048?
It's the 7 ch and i have about 6 of them. Do they put out at 1024 or 2048?
It's on a 12zhp with the 2.4ghs radio.
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08-21-2008 05:59 PM  12 years ago
helirulz

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Singapore

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sorry to hijack, but i would like to know if there's any latency difference using the 617FS and the 608FS/6014FS?
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08-21-2008 06:33 PM  12 years ago
roglan

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Norway

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Ive read somewhere that its only the R608FS and the R6014FS that has 2048.
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08-21-2008 09:35 PM  12 years ago
jsenicka

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617 is 1024 resolution. Only the 8 and 14 run at 2048Jim Senicka
Team Manager, GrandRC Flight Team
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08-25-2008 02:26 AM  12 years ago
smallplanes

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I wish i would have asked this question sooner,I've already bought about 7 of them and i have 3 6ch (all 2.4)

Thanks
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08-25-2008 10:33 PM  12 years ago
Kevin Dalrymple

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Indianapolis

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You will needa radio with 2048 out put also. If you radio dose not already use 2048 it will not out put 2048.
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08-26-2008 01:45 PM  12 years ago
jsenicka

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Eagle River, WI

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Ok
The 608/614 receivers receive signals from the transmitter at 2048 resolution. They put out a waveform to the servo that the servo interprets as a position command, based on where the signal shifts (cannot recall if it is -/+ or +/-, but it does not matter) with respect to time.
The servo is only capable of 1024 resolution, with the exception of some of the new Hitec units. So even if the receiver is linking at 2048, the servo will still pick a position that represents one of 1024 possible steps.
Bottom line is your 617 receivers are fine. Even if you had 2048 resolution servos, it would not make a monster difference in positioning, centering, etc.
Jim Senicka
Team Manager, GrandRC Flight Team
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08-26-2008 02:13 PM  12 years ago
pilotError

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Long Island, NY

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If you look under the individual receivers, it will tell you whether it's 2048 bit or not.

Futaba 2.4 Receivers
Good Judgement comes from Experience. Great Judgement comes from Bad Experience.
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08-26-2008 02:50 PM  12 years ago
baby_zyklon

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Singapore

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jesnicka, do you know if any other servos have more than 1024 resolution? Mind pointing me to the link that says the new hitec(I assume the 79xx) are 2048 resolution?
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08-26-2008 03:53 PM  12 years ago
jsenicka

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Eagle River, WI

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new Hitec (79xx) are double standard resolution. This assumes most modern digitals are 1024, based on everything was 1024 PCM last 8 years or so. Servos operate on a pulse width centered at 1500 micro seconds, and swing 45 degrees based on the pules width changing + or - 450 micro seconds (1050 to 1950). All servos can be driven to about +/- 60 degrees by setting end points to 120/140% depending on transmitter. This gives nearly 1200 microsecond total shift. If we assume a 1 micro second deadband, then a standard resolution is somewhere near 1200 steps. The new Hitec 79xx claims twice this resolutionJim Senicka
Team Manager, GrandRC Flight Team
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08-26-2008 04:12 PM  12 years ago
steph280

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Irvine, California

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While in theory the servos can only do 1024, if you have flown 1024 and 2048 on the same heli back to back, there are some obvious differences in feel. Needless to say the extra bucks for 2048 does buy you more speed/precision.

The micro servos I use in 450 size helis aren't as critical, so I tend to use the 617FS in those helis.
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08-27-2008 02:58 PM  12 years ago
Kevin Dalrymple

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Indianapolis

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I agree with steph280
the difference between 1024 and 2048 is not how the servo moves but the rate the camand is given to the servo. The slower the servo (in terms of speed) the less you will notice 1024 vs 2048. If you run fast servos like me, you can see the difference between 1024 and 2048. I am not running the new Hitec servos. You can see and feel the difference on a 9252 servo. If you are using a CCPM and are using 1024 move the swash up and down and you will see the swash moves unevenly. if you then run 2048 on the same heli you will see the difference. It is much better. Not only can you see it you can feel it in the air. This is tha same agument they had between 512 and 1024. It is just anouther step in the evolution of our radio equepment.
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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › Does the R617fs put out at 2048?
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