FrSky's X4R receiver features 4 PWM outputs (normal servo) and now includes an option for CPPM output for feeding to flight controllers or other uses. CPPM carries 8 channels on a single servo wire. Smart Port and a traditional A2 port are all located on the side of the receiver and allow you to connect all sorts of great sensors to send data back to your FrSky radio.
A FrSky FBVS can be connected to the A2 port for simple voltage monitoring as well as all of the Smart Port based sensors.
Smaller than the X6R, but still packing the new Smart Port that works with the new hubless digital sensors.
Note: This version of the X4R does not include the Sbus output. This is only a 4 channel receiver. No SBus output.
Dimension: 24mm x 41mm x 8mm (.944" x 1.6" x .315")
Weight: 5.2g (.183 oz)
Operating Voltage Range: 4V-10.0V
Operating Current: 100mA@5V
Operating Range: >1.5km (Full Range)
CPPM Output option
FrSky Taranis, Taranis Plus, & XJT module
Great RX and the others have said. I just wanted to comment that the unit i got on 2/25/16 has the smart port cable already connected to a JR servo. So no soldering or anything required if you are going to use one of the X series of Telemetry units. The product picture and the diagram below make it look like you have to make this cable yourself. It must have come with bare ends at some point and was updated.
I will admit freely I am biased, I love my Taranis, and I love the X series Receivers. the X4R is the perfect addition to the line, allowing you to install a very light telemetry receiver in aircraft such as a Radian, and still be able to use the High Precision Vario or Lipo Sensor. Sometimes the X8R is a bit of overkill, but with the X4R you have aclean easy install and same great reliability and RSSI peace of mind, This a no brainer to add to any 3 or 4 channel setup.
This is a great receiver offering all the benefits of X series, plus an analog in. I really like this receiver. If it offered CPPM it would be 5 stars instead of 4. CPPM would make this a perfect successor to the D4R-II.
Ideal receiver because of size, weight and price. Good reception at long distance so it can easily be used on medium (60) size planes or smaller. If you do not need more than 4 channels this is the receiver to use!
I enjoy building many of pat trittle a 3 channel, small park fliers and this little jewel is perfect for them. Good work, frsky!