FrSky ARCHER PLUS SR10+ Receiver User Manual

Introduction

The FrSky Archer Plus Series receivers, including the SR10+, represent an advancement in receiver technology. These receivers offer enhanced anti-RF-Interference capabilities, ensuring more solid RF performance, complementing existing anti-interference features during spark ignition. The Archer Plus series supports both ACCESS and ACCST D16 modes, intelligently matching the RF protocol during the binding process with your radio. A built-in Black-Box function allows for the preservation of basic flight data, such as power and signal information.

The Archer Plus SR10+ is a gyro-stabilized receiver featuring a built-in 3-axis gyroscope and 3-axis accelerometer. It supports multiple flight modes, including Auto-level, Stabilization, and Knife-Edge, and offers various configuration methods. The SR10+ provides 10 configurable channel ports, each assignable as PWM, SBUS, FBUS, or S.Port.

With dual detachable antennas, the SR10+ ensures full-range signal strength and optimal antenna reception and range. It can function as a primary receiver in a redundant setup by configuring a port as SBUS In and connecting to another FrSky receiver with an SBUS Out port. The FBUS protocol further enables seamless pairing with multiple telemetry devices (e.g., XACT servos, ADV Sensors), simplifying setup.

Key Features

• Enhanced Anti RF-Interference capability for more solid RF performance.
• Smart-matched ACCESS & ACCST D16 modes.
• Supports basic Black-Box function (available later via FW update).
• Built-in 3-axis gyroscope and 3-axis accelerometer sensor.
• Multiple flight modes and configuration tools (ETHOS, LUA scripts, etc.).
• 10 configurable channel ports (PWM, SBUS, FBUS, or S.Port).
• Supports signal redundancy (SBUS In).
• Full control range with telemetry (S.Port or FBUS).
• Anti-interference capability in the spark-ignition process.
• Over-The-Air (OTA) FW update.
• External battery/device voltage detection.

Specifications

FrSky ARCHER PLUS SR10+ Receiver with included accessories and specification label.

Setup

Registration & Automatic Binding

Follow these steps to complete the registration and binding procedure:

1. For TANDEM X20 (example): Enter the Model menu, select RF System, turn on the internal module, select status [ON] and ACCESS. Determine the antennas (internal or external) and choose the RF power according to actual usage. The ACCESS receiver can be registered to the radio at this moment. (Note: The "Registration" process is not required when binding the receiver in ACCST D16 mode.)
2. Connect the battery to the receiver while holding the button on the receiver. The RED LED and GREEN LED on the receiver will illuminate, indicating [Reg] status.
3. When the Register ID, RX name, and UID are displayed, click [Register]. The RED LED and GREEN LED on the receiver will flash, and the transmitter will display "Registration OK".
4. Power off the receiver.
5. Move the cursor to select any one of the 3 receivers and press [Bind].
6. Connect the battery to the receiver.
7. Select the RX; the GREEN LED will remain lit, and the transmitter will display "Bind successful".

Note: Once the receiver is registered, the button is not needed anymore in the binding process (ACCESS mode).

Gyroscope Sensor Calibration

Ensure the Archer Plus SR10+ stabilization function is enabled before proceeding with calibration.

1. The gyroscope of the device (6 surfaces) must be calibrated before mounting it into the model. Place the device on a flat surface (ground or table).
2. Ensure the stabilization device, with the Logo label side facing upwards, is placed on the desktop. Move to the radio and enter the [SRX Calibration] tool, then select "click to confirm". The yellow LED will flash until it turns off, prompting you to calibrate the sensor.
3. Complete the calibration for all device surfaces. Ensure that the values for each axis (X, Y, Z, Mod) are approximately 1.000 when the device is placed in the corresponding direction, with a deviation within ±0.1.
4. Calibration is complete once all the above steps are done.

Note: The settings for Stable System 1 and 2 are independent, and both need to be calibrated when Self Check calibration is required.

Servo Connection & Device Build

Connect the servos to the ports of the stabilization device according to the channel list below. Ensure the receiver antenna faces the nose direction, and the receiver pins are backward.

FrSky ARCHER PLUS SR10+ Receiver, front view with antennas, illustrating orientation.

Gyro gain adjustment of CH13: When the value of CH13 is in the center, the gain is zero. The gain increases as the value gets bigger. Up to ±100%, the gain reaches maximum.

Note: When using firmware versions before 1.0.5 on Archer Plus SR10+, the gain adjustment of the gyro and flight mode settings should be set to channels from CH9-12 (CH9: Gain / CH10&CH11: Flight Mode / CH12: Emergency Mode).

Mixer Channel and Radio Switches Setup

CH1~CH12 should be connected to the corresponding servos. Set up the mixer channel and radio switches according to your model's requirements. Refer to the Channel List for setting channels and switches. For example, CH13-16 can be assigned to Poti, SC, SD for Gain, Flight Mode, and Emergency Mode respectively.

Note: Please move to the [DOWNLOAD] section from the product page to download the functional Lua scripts (Place the decompressed folder in the root directory of the [Scripts] folder on the memory card to use.)

Operation

LED State Indicators

Flight Modes Configuration

The SR10+ supports various flight modes to enhance control and stability. These modes can be configured through CH14 and CH15 (for Conventional Mode) or CH14 and CH16 (for Quick Mode).

Quick Mode

Quick Mode supports stabilization, auto-level, and manual (gyroscope off) modes, configured via CH14. An emergency mode is also available, configured via CH16, which defaults to automatic level mode.

Note: The default mode of Archer Plus SR10+ is Quick Mode. If Quick Mode is applied, there is no Knife Edge or (3D) Hover Mode. CH15 is not used when using Quick Mode.

Note: Due to RSSI data from R9 receiver using the same channel (CH16) as Emergency Mode in Quick Mode of New stabilization receivers, ensure Quick Mode is entirely disabled (NOT just "Off" status) when using R9 series as redundant receiver (firmware 1.0.6 or older versions).

Conventional Mode

This mode supports stabilization and manual (gyroscope is off) modes, configured via CH14 & CH15.

Note: The Emergency Mode is canceled from firmware version 1.0.7 or later. Quick Mode does not need to be disabled when using R9 series receivers as redundant receivers.

Flight Mode Descriptions:

• Stabilization: Compensates for external forces (wind) while receiving commands, enhancing model stability on three axes (Pitch, Roll, YAW). CH13 can adjust gyro gain.
• Automatic level: Returns the model to a level orientation with internal 3-axis accelerometer and gyroscope on AIL and ELE channels when sticks are neutral. RUD channel operates in stabilization mode only.
• Hover: Orients the model's nose straight up using internal 3-axis accelerometer and gyroscope on RUD and ELE channels. AIL controls model rotation, THR adjusts altitude. AIL channel works in stabilization mode only.
• Knife-edge mode: Rolls the plane to a specific side (wing points up) using internal 3-axis accelerometer and gyroscope on RUD and AIL channels. ELE handles steering, THR/RUD maintains altitude. ELE channel operates in stabilization mode only.
• Off: Transmits received commands without compensation.

High PWM Speed Mode

The factory default setting for High PWM Speed mode is OFF. To activate, go to the receiver [Options] and select On.

Warning: High PWM speed mode is only for digital servos. Turn off High PWM Speed mode when using analog servos, otherwise, servos may overheat and burn out.

S.Port/SBUS OUT/SBUS IN/FBUS Switching

Enter the [Set] menu of the receiver. Select the desired FBUS/S.Port/SBUS Out/SBUS In option for the channel ports.

SBUS Channel Mode Switching

Enter into RX Settings. Click [SBUS], then select SBUS-16 mode or SBUS-24 mode as required.

About OTA Function

Go to the [File manager], select the FW, press the enter button, and select [Flash RX by int.OTA]. Power on the receiver, select the RX, go to [ENTER], and complete the flash process. The transmitter will display [Success]. Wait 3 seconds for the receiver to operate properly.

Note: Do not perform binding operations in close proximity while firmware upgrading is in progress. Update the firmware after the receiver has been registered (OTA).

Range Check

A pre-flight range check is crucial before every flight to prevent signal loss due to nearby metal objects, concrete, buildings, or trees.

1. Place the model at least 60 cm (2 feet) above non-metal contaminated ground (e.g., on a wooden bench). The receiving antenna should be in a vertical position.
2. Enter the ETHOS system, navigate to "RF System", scroll the Encoder to select "RANGE" mode, and press Encoder. In range check mode, the effective distance will be decreased to 1/30.

Failsafe Settings

There are three failsafe modes: No Pulse, Hold, and Custom mode.

• No Pulses Mode: On signal loss, the receiver produces no pulses on any PWM channel. Select this mode in the menu and wait 9 seconds for the failsafe to take effect.
• Hold Mode: The receiver continues to output the last positions before the signal was lost. Select this mode in the menu and wait 9 seconds for the failsafe to take effect.
• Custom Mode: Pre-set to required positions on signal loss. Move the cursor to the failsafe mode of the channel, press Encoder, and choose Custom mode. Move to the desired channel, press Encoder, rotate the Encoder to set your failsafe for each channel, and short-press Encoder to finish. Wait 9 seconds for the failsafe to take effect.

Note: If failsafe is not set, the model will operate with the last working status before signal loss, which could cause damage. If failsafe is disabled on the RF module side, the receiver defaults to Hold mode. In No Pulses Mode, do not set Failsafe to No Pulses Mode for the SBUS port, as it will continuously output signal. Set "Hold" or "Custom" mode for the SBUS port.

Maintenance

Regularly check the FrSky website for the latest firmware updates to ensure optimal performance and access to new features. Firmware updates are typically performed Over-The-Air (OTA) as described in the operation section.

Ensure all connections are secure and free from corrosion. Inspect antennas for any damage before each flight.

Troubleshooting

• Receiver not binding: Ensure the transmitter is in the correct mode (ACCESS/ACCST D16) and the binding procedure is followed precisely. Check LED indicators for status.
• Unstable flight/unexpected behavior: Perform gyroscope sensor calibration. Verify servo connections and mixer channel settings. Check the flight attitude inspection in Auto-Level mode to ensure wing servo reactions are correct.
• Loss of signal/short range: Conduct a range check before flying. Ensure antennas are correctly positioned (vertical) and not obstructed by metal objects. Check for potential RF interference sources.
• Servos overheating in High PWM Speed Mode: This mode is only for digital servos. If using analog servos, disable High PWM Speed mode immediately.
• Failsafe not working as expected: Review failsafe settings (No Pulse, Hold, Custom). Ensure failsafe is properly set for all critical channels, especially the SBUS port.

Warranty & Support

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate transmitter frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to transmitter communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to transmitter or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced transmitter/TV technician for help.

Further Support

FrSky continuously adds features and improvements to its products. For the most up-to-date information, firmware, and manuals, please visit the download section of the official FrSky website: www.frsky-rc.com.

You can also refer to the original user manual PDF for this product: FrSky ARCHER PLUS SR10+ Receiver User Manual (PDF).