PWM might be an old school for Racing drone pilots. However, it is still the elixir of life for RC plane enthusiasts and Hobbyists. Even though advanced flight controller systems have started to show up in planes, but still, PWM is unavoidable for RC needs. Hence we are looking at this old technology in 2020 and let’s find out some important FrSky PWM Receiver that you can buy these days.

FrSky R-X8R Pro Receiver

The first receiver we are taking in the R-X8R pro which is the successor of the X8R receiver. In fact, it is an upgraded version based on the RX8R receiver which has all the same features including redundancy. The Pro version has higher precision and lower latency which results in great reliability.

Its deviation of PWM is reduced to 0.5us, and the delay of PWM output is 9ms less than that of the X8R in a high-speed mode which makes it more tempting to put on your plane. A feature that deserves mention is the decreased effect of interference caused by the ignition process which is highly useful for RC planes

Features at a Glance:

  • Strong anti-interference performance in the ignition process
  • Higher precision of PWM
  • Lower latency on the PWM output
  • Support redundancy function
  • Smart Port enabled and support telemetry data transmission


  • Dimension: 46.3mm*26.6mm*14.2mm (L*W*H)
  • Weight: 14.8g
  • Numbers of Channels: 16CH(1~8CH PWM or 9~16CH PWM from conventional channel outputs, 1~16CH from SBUS port)
  • With RSSI Output on Board: Analog DC 0~3.3V
  • Operating Voltage Range: 3.5V~10V
  • Operating Current: 100mA@5V
  • Operating Range: full range
  • Firmware Upgradeable
  • Servo Frame Rate: 9ms (HS—High-Speed Mode) 18ms (FS—Normal Speed Mode)
  • Compatibility: FrSky transmitters/transmitter modules in D8/D16 mode

FrSky S8R Receiver

The next FrSky PWM Receiver we are considering is the FrSky S8R is which features the built-in 3-axis stabilization for more precise controlling. For conventional Fixed Wing and Glider Models it will support stabilization, automatic level, hover and Knife-edge flight modes, for Delta Wings or flying wings and V-tail models it supports stabilization and automatic level flight modes.

Hence the need for Flight controllers can be avoided up to an extent. You can edit the type of model and manipulate all these features via the S8R Config or S8R Lua. The S8R can also be used as a standard 8 channel X series receiver if it is required under such circumstances.

Features at a Glance:

  • Built-in RSSI PWM output(0-3.3V)
  • Built-in battery voltage detection
  • Built-in 3-axis gyroscope and 3-axis accelerometer sensor module
  • Smart Port enabled
  • SBUS Port enabled


Compatibility: FrSky Taranis X9D Plus/X9E/X7/Horus X12S/XJT in D16 mode

S8R-EU only works with FrSky Taranis X9D Plus/X9E/X7/Horus X12S/XJT in D16-EU mode

Firmware Upgradable: Firmware Upgradeable

Dimension: 46.47×26.78×14.12 mm (L×W×H)

Weight: 14g

Operating Range: Full Range

Operating Voltage Range: 4.0-10V

Operating Current: 120mA@5V

Number of Channels: 8/16 (1-8ch from conventional channel outputs, 1-16ch from SBUS output)

RSSI : With RSSI PWM output onboard: PWM voltage output(0-3.3V), 100Hz, 1500±500us

Measurement Range: Gyroscope Measurement Range: ±2000dps

Accelerometer Measurement Range: ±4g

FrSky Delta 8 Receiver

The third receiver we have taken into consideration is very special. It is a  FrSky PWM Receiver that has multiprotocol capability developed by FrSky. Delta-8 Not only is it the first Futaba FHSS compatible, but it is also the first time anyone has a single receiver that supports 3 different protocols! Binding is simple, and the receiver automatically locks into the correct protocol which literally sounds amazing.

As an option, you can use jumpers to lock it into your protocol. If that was not enough, this receiver also features CPPM and RSSI output options. CPPM allows you to feed all 8 channels through a single servo connector and is great for Flybarless helicopters and other flight controllers such as Quads and racing drones.RSSI output is great for sending your signal strength indicator to an onboard video system. These are advanced features you typically have to pay a premium for elsewhere.


Operating Voltage Range: 3.0V-16V (HV Version)  

Operating Current: 30mA

Specified Range: 1.5km-2.5km

Resolution: 3072

Latency: 22ms

Number of Channels: 8CH

Dimensions: 49mm×24.5mm×15mm

Weight: 9.3g


This article was about introducing some new FrSky PWM receiver that has PWM output. We have familiarized ourselves with 3 such receivers. Each one of them was unique and packed with power features. They will perform very well in your Radio control requirements. Thanks for reading.