FrSky receiver feature chart

For posterity, some details about the current range of FrSky ACCST receivers. Last updated 15th April 2018.

Since creating this I discovered this wiki page:
http://www.eflightwiki.com/eflightwiki/index.php?title=FrSky_Telemetry#Receivers

But this table should still be useful as a comparison chart covering all of FrSky's ACCST receivers.

Receiver PWM Servo outputs Range Protocol Telemetry Configurable Failsafe Combined output RSSI out Analog 1 input Analog 2 input Digital telemetry input High Speed Servos Redundancy
V8R4-II 4 1km V8/D8 no yes no no N/A N/A N/A no no
V8R7-II 8 1.5km V8/D8 no yes no no N/A N/A N/A no no
V8R7-SP 7 1.5km V8 no yes CPPM (8) no N/A N/A N/A no no
VD5M 5 (micro) 300m V8/D8 no no no no N/A N/A N/A no no
V8FR-II 8 1.5km V8/D8 no yes no no N/A N/A N/A no no
D4R-II 4 1.5km D8 yes yes CPPM (8) yes internal voltage yes Hub Protocol no no
D6FR 6 1.5km D8 yes yes no no internal voltage yes no yes no
D8R-XP 8 1.5km D8 yes yes CPPM (8) yes yes yes Hub Protocol yes no
D8R-II Plus 8 1.5km D8 yes yes no no yes yes Hub Protocol yes no
X4R 4 1.5km D16 yes yes CPPM (8) yes internal voltage yes Smart Port no no
X4R-SB 3 1.5km D16 yes yes S.Bus (16) yes internal voltage yes Smart Port no no
RX4R 4 2km D16 yes yes S.Bus (16) yes internal voltage no Smart Port yes yes
X6R 6 1.5km D8/D16 yes yes S.Bus (16) yes internal voltage / external analog no Smart Port no no
S6R 6 1.5km D8/D16 yes yes no yes internal voltage / external analog no Smart Port no no
RX6R 6 2km D16 yes yes S.Bus (16) yes internal voltage no Smart Port yes yes
X8R / S8R 8 1.5km D8/D16 yes yes S.Bus (16) yes internal voltage no Smart Port no no
RX8R 8 1.5km D8/D16 yes yes S.Bus (16) yes internal voltage no Smart Port no yes
RX8R PRO 8 1.5km D8/D16 yes yes S.Bus (16) yes internal voltage no Smart Port yes yes
XSR / XSR-M 0 1.5km D16 yes yes S.Bus (16) / CPPM (8) no internal voltage no Smart Port N/A no
R-XSR 0 1.5km D16 yes yes S.Bus (16) / CPPM (8) no internal voltage no Smart Port N/A yes
G-RX8 8 1.5km D16 yes yes S.Bus (16) no internal voltage yes Smart Port + integrated vario yes yes
L9R 9 3km LR12 no yes S.Bus (12) yes N/A N/A N/A no no
XM 0 600m D16 no yes S.Bus (15) yes (and CH16) N/A N/A N/A N/A no
XM+ 0 1.5km D16 no yes S.Bus (15) yes (and CH16) N/A N/A N/A N/A no
XMR 6 300m D16 no yes no no N/A N/A N/A no no
R9 8 10km R9 yes on Tx S.Bus (16) yes internal voltage no Smart Port no yes
R9 slim 6 10km R9 yes on Tx S.Bus (16) yes internal voltage no Smart Port no yes

Transmission Modes

There are four transmission modes of FrSky ACCST receivers, from oldest to newest:

  • V8 - non-telemetry channel-hopping, upto 8 channels.
  • D - stands for "duplex" (meaning two-way). The protocol supports telemetry, and upto 8 channels. Note that the "V*-II" generation of receivers can use this protocol, but do not support telemetry.
  • X - uses a more advanced way of communicating between the radio and the receiver (PXX). Supports upto 16 channels and telemetry.
  • L - long range, no telemetry, uses PXX modulation, upto 12 channels.

Telemetry

The "V8", "L" and "XM" series of receivers do not support telemetry. The "D" and "X" receivers all support transmission of "received signal strength" (RSSI), but support three different methods of connecting sensors:

  • Analog: Up to 2 analog input ports (A1 and A2) for simple voltage-based sensors. Some receivers have A1 internally connected to measure the receiver's voltage, with A2 open for external sensors (e.g. for flight battery voltage).
  • Digital: The digital port on D-series receivers allows connection of more complex sensors such as a variometer. Multiple sensors can be connected via a hub.
  • Smart Port: This newer mechanism on X-series receivers uses a full-duplex (two way) digital serial communication over a single signal wire. Sensors can be chained together and a hub is not required.

Modulation

  • The V8 and D generation receivers both use PPM modulation, which can carry upto 8 channels. Some receivers can output a combined CPPM signal on a 3-pin connector (either dedicated or one of the servo outputs), which is useful for example for multicopter control boards.
  • The X generation receivers can use PXX, which has upto 16 channels, lower latency and features such as ModelMatch. Most of these receivers can output combined channels via a separate Futaba S.Bus port. A few are switchable to CPPM too.

Redundancy

The 'R' range of X series receivers (R-XSR, RX6R, RX8R, RX8R PRO, G-RX8, R9, R9 slim) feature a redundancy option.

High Speed servos

Some D-series and X-series receivers have an option for a faster update rate from their PWM servo ports. This is 9ms, compared to the default 18ms.

Stabilisation

The S6R and S8R receivers add a 3-axis stabilisation feature to the X6R and X8R respectively.

FASST receivers

I haven't collated the features for the TF range of FASST receivers but may do in future. Feel free to send me a list of the stats and I'd be happy to add them.

Tags:

Comments

Nice sum up of all the FrSky Tx features. Cheers!

To the author, I generally don't comment however this is such a nice compliation, I had to compliment. 

Cheers,

Jay

Thank you. I haven't been following FrSky developments in the last year or two but if anyone has the info to update the chart with any new receivers I'd be glad to include them.

This post is just what I was looking for nice job The only question I still have is where the XSR would fit in to this as compared to the X8R?

The chart is very useful for FrSky freak. I bought one FrSky Taranis after comparing the FrSky with the help of your chart. Thanks a lot.

Need a update with all the new Rx's.

I am not familiar with anything released in the last few years so if you can compile the info I'd be glad to update it.

Great work ! Thank you. Saved me a lot of time.

Just come across this really handy page, This is a nice piece of work & will come in very handy as these receivers work there way onto the second hand market .... just what I was looking for.....

Regards.....

 

Thanku soo much.....

Very helpfull

Thanks!

Missing RX6R 

Added RX6R and RX4R

Also R9 mini, appears to be a new item

Great list, thanks. Missing G-RX6 now. Also, I understand S6R lacks SBUS output, unlike X6R, S8R and X8R.

Good call on the S6R, I was looking at the image of the S8R in the S6R I think. Have corrected. If you can gather the defials for missing ones I will add them but I have lacked time a bit lately to keep on top of it and RC is taking a back seat at the moment.

This list is absolutely fanstastic - very thorough and easy to navigate, well done, thanks heaps!

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