900 MHz or 2.4 GHz what is better - Page 5 - RC Groups
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Nov 19, 2017, 12:44 PM
Thermals, Tom
RyanNX211's Avatar
That hasn't been my experience. While I can affirm that XPS will operate down to the lowest voltage and easily has the best range, interference is possible and I've had to remove the Nano from two aircraft. I have been unable to interfere with either Futaba FASST or FHSS.

Spektrum and FrSky are the absolute easiest to screw with. Spektrum also had voltage issues.

I have no first hand experience with HiTec because I've only used my A9 with an XPS module. Friends on the west coast report no issues with Airtronics.

I have some videos I can post and could make some more under controlled conditions.

What's ACKS?
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Nov 19, 2017, 05:32 PM
Like I said, Futaba/FrSky/Hitec all use the exact same over-air protocol. You could have a single receiver compatible with all 3. Likewise, XPS/JETI/JR DMSS are all the same. Spektrum is the only one using their over-air protocol.

ACKs are acknowledgements. The XtremeLink system is the only system on the market that requires that the reciever send a response to the transmitter. If the transmitter doesn't get an ACK (acknowledgement) from the reciever within 862us of the data being sent, the transmitter will automatically re-send the packet. That repeats until either the receiver response gets through or the next frame occurs, at which point the new data will be used.
Last edited by JimDrew; Nov 19, 2017 at 05:37 PM.
Nov 19, 2017, 07:38 PM
Registered User
Sounds like frequency hopping to me .....
Nov 20, 2017, 12:15 AM
No, this is in addition to the frequency hopping.
Nov 21, 2017, 08:40 AM
Thermals, Tom
RyanNX211's Avatar
There are many under appreciated benefits to XPS

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