1. Prodotto finitoview
This manual provides detailed instructions for the Radiomaster series of multi-protocol receivers, including models R81, R84, R86, R86C, and R88. These receivers are designed for use with FPV drones and other RC applications, offering compatibility with Frsky D8 protocol and various channel configurations (4CH, 6CH, 8CH) with PWM and SBUS output options.
Please ensure to verify the model and part number for compatibility before installation.
2. Specifiche tecniche
Di seguito sono riportate le specifiche dettagliate per ciascun modello di ricevitore:
2.1. Radiomaster R81 Receiver
| Caratteristica | Specificazione |
|---|---|
| Canali | 8 |
| Gamma di frequenza | Frequenza 2400-2483.5 MHz |
| Gamma di alimentazione in ingresso | 4.5-6 V |
| Formato del segnale | D8 |
| Formato di output | SBUS |
| Supporto telemetrico | RSSI |
| Distanza di controllo | Oltre 1 km |
| Lunghezza dell'antenna | Circa 6 cm |
| Misurare | 17x11mm |
| Peso | 2 grammi |
2.2. Radiomaster R84 4CH Receiver

Image: Radiomaster R84 4CH Receiver, showing its compact size and pin configuration for channels 1-4 and power input.
| Caratteristica | Specificazione |
|---|---|
| Canali | 4 |
| Gamma di frequenza | Frequenza 2400-2483.5 MHz |
| Gamma di alimentazione in ingresso | 4.5-8.4 V |
| Formato del segnale | Frsky D8 compatible |
| Formato di output | Movimentazione continua |
| Supporto telemetrico | RSSI |
| Distanza di controllo | Oltre 1 km |
| Lunghezza dell'antenna | 6 centimetri |
| Misurare | 17x11mm |
| Peso | 2 grammi |
2.3. Radiomaster R86 6CH Receiver
| Caratteristica | Specificazione |
|---|---|
| Canali | 6 (PWM), 8 (SBUS) |
| Gamma di frequenza | Frequenza 2400-2483.5 MHz |
| Gamma di alimentazione in ingresso | 4.5-8.4 V |
| Formato del segnale | Frsky D8 compatible |
| Formato di output | Movimentazione continua |
| Allineare | Oltre 1 km |
| Lunghezza dell'antenna | 15 centimetri |
| Misurare | Dimensioni: 45x21.2x12.7mm |
| Peso | 8 grammi |
2.4. Radiomaster R86C Receiver
| Caratteristica | Specificazione |
|---|---|
| Canali | 6 (PWM), 8 (SBUS) |
| Gamma di frequenza | Frequenza 2400-2483.5 MHz |
| Gamma di alimentazione in ingresso | 4.5-8.4 V |
| Formato del segnale | Frsky D8 compatible |
| Formato di output | PWM / SBUS |
| Supporto telemetrico | RSSI |
| Allineare | Oltre 1 km |
| Lunghezza dell'antenna | 15 centimetri |
| Misurare | Dimensioni: 45x21.2x12.7mm |
| Peso | 8 grammi |
2.5. Radiomaster R88 8CH Receiver
| Caratteristica | Specificazione |
|---|---|
| Canali | 8 |
| Gamma di frequenza | Frequenza 2400-2483.5 MHz |
| Gamma di alimentazione in ingresso | 4.5-8.4 V |
| Formato del segnale | Frsky D8 compatible |
| Formato di output | Movimentazione continua |
| Supporto telemetrico | RSSI |
| Allineare | Oltre 1 km |
| Lunghezza dell'antenna | 15 centimetri |
| Misurare | Dimensioni: 40x26x16mm |
| Peso | 11 grammi |
3. Setup and Binding Instructions
This section outlines the general procedure for setting up and binding your Radiomaster receiver to a compatible transmitter (e.g., Radiomaster TX16S, SE).
3.1. Pre-binding Checklist
- Ensure your transmitter is powered on and set to the correct protocol (Frsky D8).
- Verify the receiver is correctly connected to a power source within its specified voltage range (e.g., 4.5-8.4V for R84, R86, R86C, R88; 4.5-6V for R81).
- Conferma che tutte le connessioni siano sicure.
3.2. Procedura vincolante
- Power On Receiver in Bind Mode: Connect power to the receiver while holding down the bind button (if present) or follow the specific power-on sequence for bind mode. For most Radiomaster R-series receivers, the LED will flash rapidly indicating bind mode.
- Activate Bind Mode on Transmitter: On your Radiomaster transmitter, navigate to the model setup menu. Select the Frsky D8 protocol. Choose the "Bind" option.
- Conferma associazione: The receiver's LED should change from rapidly flashing to solid, indicating a successful bind. If the LED continues to flash, repeat the binding process.
- Connessioni di prova: After successful binding, power cycle both the transmitter and receiver. Test all control surfaces and functions to ensure proper communication.
Note: Specific bind button locations or power-on sequences may vary slightly between receiver models. Refer to your transmitter's manual for detailed binding instructions.
4. Funzionamento
Once bound, the receiver will establish a connection with your transmitter upon power-up. Ensure your transmitter is powered on first, then power on your model with the receiver. The receiver's LED should illuminate solid, indicating a stable connection.
4.1 Uscita del canale
- Uscita PWM: Models like R84, R86, R86C, and R88 provide individual PWM outputs for each channel. Connect your servos or ESCs directly to the corresponding pins.
- SBUS Output: The R81 and R86C models also offer SBUS output. SBUS allows for a single wire connection to flight controllers, transmitting all channel data digitally.
4.2. RSSI Telemetry
All listed Radiomaster R-series receivers support RSSI (Received Signal Strength Indicator) telemetry. This feature allows your transmitter to display the signal strength received by the receiver, providing critical information about link quality during flight. Consult your flight controller or transmitter manual for instructions on how to enable and display RSSI data.
5. Manutenzione
Proper maintenance ensures the longevity and reliable operation of your receiver.
- Ispezione fisica: Regularly inspect the receiver for any physical damage, loose wires, or corrosion.
- Posizionamento dell'antenna: Ensure antennas are properly positioned and not obstructed by carbon fiber or metal components. Avoid sharp bends in the antenna wires.
- Protezione ambientale: Protect the receiver from moisture, dust, and extreme temperatures. Consider using conformal coating or heat shrink for added protection in harsh environments.
- Aggiornamenti del firmware: Periodically check the Radiomaster official website for any available firmware updates for your receiver or transmitter. Updates can improve performance and add new features.
6. Risoluzione Dei Problemi
If you encounter issues with your receiver, consider the following troubleshooting steps:
- No Link/No Control:
- Verify the receiver is correctly bound to the transmitter. Re-bind if necessary.
- Check that the transmitter is powered on and set to the correct protocol (Frsky D8).
- Assicurarsi che il ricevitore riceva potenza adeguata entro il volume specificatotage gamma.
- Ispezionare tutti i cavi per verificare che non vi siano collegamenti allentati o danni.
- Check antenna placement; ensure they are not shielded or damaged.
- Segnale intermittente/corto raggio:
- Check for sources of interference (e.g., other 2.4GHz devices, noisy ESCs, FPV video transmitters).
- Ensure antennas are positioned optimally, away from carbon fiber, metal, and other electronics.
- Verify the transmitter's RF power setting is appropriate.
- Controllare che le antenne non siano danneggiate.
- Uscita canale errata:
- Confirm the correct output format (PWM/SBUS) is selected on your flight controller or device.
- Check channel mapping on your transmitter and flight controller.
7. Garanzia e supporto
For warranty information, technical support, or service inquiries, please refer to the official Radiomaster webo contattare il rivenditore autorizzato. Conservare la prova d'acquisto per eventuali reclami in garanzia.
Produttore: HePbak
Prima data disponibile: 16 ottobre 2023





