RADIOMASTER R86C Receiver User Manual

Product Features

Channels: 6 channels (PWM) / 8 channels (SBUS)

Frequency Range: 2400-2483.5MHz

Power Input Range: 4.5-6V

Signal Format: D8

Output Format: PWM / SBUS

Support Return: Supports return RSSI

Range: More than 1km

Antenna Length: 15cm

Size: 45*21.2*12.7mm

Weight: 8g

Binding Method

1. Turn on your transmitter and select the desired protocol.
2. Enter bind mode on the receiver. Press and hold the bind button while powering on the receiver. The receiver will cycle between D8, D16, and S-FHSS protocols.
   • Three single flashes = D8 protocol.
   • Three double flashes = D16 protocol.
   • Three triple flashes = S-FHSS protocol.
3. When the flash pattern matches the transmitter protocol, press bind on the transmitter. The light will flash rapidly then return to solid.
4. Cycle the power to the receiver after binding.

Fail-safe Protection

1. Press the BIND button once within 10 seconds of the receiver being powered on, and the receiver will save all the current channel values of the remote control as the fail-safe value.
2. 10 seconds after the receiver is powered on, the BIND button function will be disabled to prevent accidental changes to the fail-safe settings while preparing the model for flight.

RSSI Output

This receiver has a total of 6 PWM channels + 9 SBUS Channels (SBUS has 8 control channels + 1 RSSI channel). Channels 1-8 are controlled by the remote controller, the 9th channel is the signal strength RSSI value output by the receiver, which can be read by various flight controllers and sent to the OSD to show signal strength in the FPV video feed.

Frequency Tuning

Note: D8 and D16 compatible receivers MUST be frequency fine-tuned before flight.

Once the radio is bound to the receiver:

1. Return to the RF Freq. fine tune option.
2. Lower the value until the radio loses the connection with the receiver. Record the value (TUNE_MIN).
3. Raise the value so that the connection is restored, then continue to raise it until the radio loses the connection with the receiver again. Record the value (TUNE_MAX).
4. Calculate the median between the two values: (TUNE_MIN + TUNE_MAX) / 2 = TUNE_MEDIAN.
5. Set RF Freq. fine tune to the median value.

Example: Connection is lost at -73 and +35; the median is -19.

Once the Fine Tuning value is known, it can be used for all models which use the same protocol.

For more information visit: https://www.multi-module.org/using-the-module/frequency-tuning

Model Setup Example

Channel Range: CH1 - CH16

Receiver: R86C

RF Freq. fine tune: [Value displayed, e.g., 00]

Bind on channel: [Value displayed, e.g., 00]

Disable Telemetry: [Value displayed, e.g., OFF]

Low power mode: [Value displayed, e.g., Custom]

Failsafe mode: [Value displayed, e.g., Set]

External RF: [Value displayed, e.g., OFF]

Mode: [Value displayed, e.g., 1 Jan 00:01]