RX6R & RX4R 2Km range

[TerryH]

In reviewing the specs of the various X-series receivers,
I noticed that the RX6R, RX4R, and G-RX6 Vario all have the operating range specification of > 2km while all the other X-series receivers are specified at >1.5km or full range.
The RX8R PRO is also only specified at >1.5km range.

Are the RX6R, RX4R and G-RX6 Vario receivers the latest generation receivers from FrSky and do they have slightly better RF performance than all their other receivers or is this just an update of their range specifications of these receivers. I would assume FrSky is using the same RFIC in all of their receivers, thus the RF performance should be the same. I ask as this may impact which receivers to purchase in the future.

Thoughts or any inside information?
Thanks

 

[Konrad]

No inside info here but, I can say that the G-RX6 works great past 2km. The G-RX8 has worked fine to about 4 km in a 3.2 meter glider*. As to how much better they work compared to the current production X series I can't say as I haven't flow the "RX" against the "X" series receivers back to back. But I don't recall having an issue with the X series. This is assuming the antennas are placed at 90° and that they aren't blocked by conductive materials, like carbon or a huge battery.

* My vision is more of an issue than the RF link at that distance.

 

[TerryH]

My goal is not that I need a receiver that works out to 1.5 or 2 km, Konrad as you said the vision is not possible. However, when considering the receiver antennas are nearby to servos, ESC's and batteries, the installation then becomes non-idea for the antennas best performance, and then consider for when doing aerobatics the antennas may not be in the best orientation when the plane is in a certain orientation (my antennas are always 90 deg to each other). Thus it is always good to have an excellent performance receiver, so you never have to think about the flight control of the aircraft.

In the RX6R receiver manual under "What's New", it lists High precision PWM signal (Precision: less than 0.5 usec) in addition to a 40% increase in range.

It is for these reasons, it seems there is a newer generation receiver within the X-series line. The RX8R (or Pro) manual does not list any of these specifications, which implies it is the older receiver of the X-series. The RX8R manual is dated 2016-12-16 on the FrSky website, whereas the RX6R is dated 2018-06-19.

Cheers

 

[PressAllTheKnobs]

Not sure about the G's but the "RX-" series are redesigned and I believe have a custom chip that combines the processor, RF and antenna switch chips that were used on the original X- series and in the XJT module. That is hy they are much smaller. FrSky claim the new RX- series have better sensitivity and therefore better range.