RadioLink R7FG Instruction Manual

Introduction

Thank you for purchasing the RadioLink 7-channel dual antenna receiver R7FG. To fully enjoy the benefits of this product and ensure safety, please read the introduction carefully and set up the device as instructed.

If any problems are found during the operation process, please refer to the manual first. You can also contact distributors for solutions or follow RadioLink on Facebook at facebook.com/radiolinkofficial. For questions, email after_service@radioLink.com.cn or after_service1@radioLink.com.cn.

Information in this manual is subject to change without notice due to production procedure updates. For more information, visit www.radiolink.com and follow RadioLink on Facebook and YouTube.

Safety Precautions

• Never operate your model during adverse weather conditions, as poor visibility can cause disorientation and loss of control.
• Never use this product in a crowd or illegal area.
• Always ensure the trim levers are at 0 and the battery is properly charged before connecting the receiver.
• Always check all servos and their connections prior to each run.
• Always be sure to turn off the receiver before the transmitter.

Warning

This product is not a toy and is NOT suitable for children under the age of 18. Adults should keep the product out of the reach of children and exercise caution when operating this product in the presence of children.

Water or moisture may enter the transmitter through gaps in the antenna or joystick, potentially causing model instability or loss of control. If operating in wet weather is unavoidable, use plastic bags or waterproof cloth to cover the transmitter.

I. R7FG Introduction

1.1 Compatible Transmitters

The RadioLink R7FG 2.4G 7-channel receiver with integrated gyro is designed for professional car drifting and high voltage servo support. It is compatible with RadioLink RC6GS V2/RC6GS/RC4GS V2/RC4GS/RC3S/RC4G/T8FB/T8S.

Diagram Description: The diagram shows the R7FG receiver with its antenna, binding button (ID SET), LED indicator, signal and power (VCC/GND) ports. It also indicates the telemetry port for model battery voltage and the various channel outputs (CH1 Steering, CH2 Throttle, CH3 Aux, CH4 Aux, CH5 Aux, CH6 Aux, PPM/SBUS).

1.2 Binding

Each receiver has an individual ID code and must be bound with the transmitter before use. Once binding is complete, the ID code is stored in the transmitter, eliminating the need for rebinding. If a new R7FG is purchased, it needs to be bound to the transmitter.

Binding Steps:

1. Place the receiver and transmitter close to each other (approx. 50cm).
2. Power on the transmitter; the R7FG will automatically bind to the closest transmitter.
3. Press the ID SET on the receiver's side for more than 1 second. The GREEN indicator will flash, indicating the binding process has begun.
4. When the GREEN indicator stops flashing, binding is complete.
5. Test the model servo to ensure it operates correctly with the transmitter.

Note:

• By default, the gyro function is OFF. The R7FG performs a self-check. A solid GREEN LED indicates normal working mode (gyro OFF), while solid GREEN+RED LEDs indicate gyro working mode (gyro ON).
• A flashing GREEN LED when powered on indicates no signal or unsuccessful binding. Rebind the receiver to the transmitter.

II. Telemetry

The R7FG can transmit real-time flight information, including RSSI, receiver voltage, and model battery voltage.

To enable this function, upgrade the firmware for RC6GS (3-position switch version) with the firmware RC6GS_RadioLink_bin_1d15_V_6_1_2 or for RC4GS (produced after 2018-01-01) with the firmware RC4GS_RX_RadioLink_bin_2f50_V_6_0_1. If using RC6GS V2 or RC4GS V2, the default firmware supports telemetry.

2.1 Telemetry of Signal and RSSI

After powering on the transmitter and receiver and completing the binding process, the signal status will be displayed on the transmitter's homepage. Short press EXIT twice to access the interface showing returned information, including the RSSI value.

Diagram Description: The transmitter display shows "MODEL4 8.0V RSSI: -31dBm RC6GS 12.27 RATE: 000rpm ST H I HO EXT: 0.0V TH H H ORX: 4.1V T:NULL".

You can set a low RSSI value for warnings after testing by changing distance. Press EXIT and ENTER simultaneously to enter the MENU. Highlight "19. ALARM" and press ENTER to activate/deactivate the warning and set the RSSI warning value.

2.2 Telemetry of Model Battery and Receiver Voltage

In addition to receiver voltage, the model's battery voltage (up to 8S lithium battery) can also be displayed in real-time. Users can personalize the low battery voltage warning value.

Press EXIT and ENTER simultaneously to enter the MENU. Highlight "19. ALARM" and press ENTER to set the model battery voltage warning value. A common setting for the warning value is 3.7V per cell. For a 3S lithium battery, the warning value should be set to 11.1V (3.7V * 3S).

Model battery voltage can be monitored by connecting the male end of the battery wire to the ESC and the female end to the battery. The wire with a JST head connects to the Telemetry (+-) port of the R7FG/R8F. No extra module is needed.

Diagram Description: The diagram illustrates the connection of the battery, ESC, motor, servo, and R7FG receiver via a telemetry cable. The transmitter display shows "MODEL9 12.0V RC6GS 12.2V ST H T H H 0 0".

III. Subsidiary ID

The Subsidiary ID function allows designating a subsidiary ID among multiple bound receivers for control. This can be accessed via the ID seed menu on RC6GS (3-way switch version with firmware V6.0.0) or RC4GS (produced after 20180101 with firmware V6.0.1). A transmitter can store up to 10 independent subsidiary IDs.

For example, if RC6GS is bound to 10 different boats and their parameters are set, you can use the ID SEED function to select ID.1 boat. If it stops working unexpectedly, you can switch to ID.2 boat (or another preferred subsidiary ID) to control it independently for rescue, rather than trying to control both simultaneously.

Procedure: Press EXIT and ENTER simultaneously to enter MENU. Press Inc(+) / DEC (-) to highlight "22. ID SEED", then press ENTER. Change the MODE from OFF to ON, set the subsidiary ID number, and complete the binding and parameter settings.

Once finished, the corresponding ID number will be displayed on the RC6GS main interface. Other receivers can be bound similarly using subsequent numbers.

Diagram Description: The transmitter display shows "MODEL4 8.0V [ID SEED] DRC6GS 12.27 MODE:ON SEED: ID01 ST H 0 TH H 0".

IV. Working Modes

The R7FG receiver supports four working modes:

Mode Descriptions:

• Mode 1: PWM+PPM output (Factory setting by default)
  When the green indicator is on, Channels 1-6 output standard PWM, and Channel 7 outputs PPM. Short press ID SET once to change to Mode 2, and three times within 1 second to Mode 4.
• Mode 2: PWM+SBUS output
  When the blue indicator is on, Channels 1-6 output standard PWM, and Channel 7 outputs SBUS. Short press ID SET once to change to Mode 1, and three times within 1 second to Mode 3.
• Mode 3: PWM+SBUS output + Gyro
  When both red and blue indicators are on (purple), Channels 1-6 output standard PWM, and Channel 7 outputs SBUS. The gyro function is also active, stabilizing direction, preventing slipping, and ensuring safer turning to prevent drifting at high speeds. Short press ID SET once to change to Mode 4, and three times within 1 second to Mode 2.
• Mode 4: PWM+PPM output + Gyro
  When both red and green indicators are on (orange), Channels 1-6 output standard PWM, and Channel 7 outputs PPM. The gyro function is also active, stabilizing direction, preventing slipping, and ensuring safer turning to prevent drifting at high speeds. Short press ID SET once to change to Mode 3, and three times within 1 second to Mode 1.

V. Gyro Introduction

5.1 Gyro Function

The R7FG integrated gyro is designed for professional car drifting and can be enabled or disabled. When enabled, it maximizes turning stability during competition. In case of false positioning, the gyro function helps maintain straight forward movement and precise turning.

5.2 Gyro Parameter

• Gyro Enabled: By default, the gyro function is OFF. When powering on the R7FG, the gyro performs a self-check. A solid GREEN LED indicates the working mode without gyro, while solid GREEN+RED LEDs indicate the working mode with gyro.
• Gyro Phase: Similar to model aircraft, car gyros have a phase. Correct phase setting ensures the gyro consistently corrects directions.

5.3 Gyro Setup

• Gyro Enabled: Short press ID SET three times with an interval less than 1 second. The RED indicator flashes three times. The Red LED turning on/off indicates the gyro function is enabled/disabled.
• Gyro Phase: When the gyro is enabled for forward movement, turn the model car to check if the gyro is correcting the wheels. Ideally, the wheels should turn right to correct a left turn, and left to correct a right turn. If the gyro phase is reversed, short press ID SET twice with an interval less than 1 second. The Red indicator flashing twice confirms the gyro phase setting is complete.

5.4 Transmitter Sensitivity Adjustment

Gyro sensitivity is set to CH3 by default (factory setting) and can be adjusted using the VR rotary switch. The percentage displayed indicates sensitivity; a higher percentage means higher sensitivity. If the VR rotary switch/CH3 is used for another function, gyro sensitivity can be adjusted via the transmitter's menu settings.

VI. R7FG Specifications

1. Frequency: 2.4GHz ISM band (2400MHz~2483.5MHz)
2. Dimension: 35*20*13mm
3. Weight: 6g
4. Channel Qty: 7 channels
5. Signal Output: PWM&SBUS/PWM&PPM
6. Model Application: Car/Boat/Fixed Wing/Glider/Multirotor
7. Encode: FHSS 67-channel pseudo random frequency hopping
8. Antenna Length: 200mm (dual antennas)
9. Voltage Range: 4.6-10V
10. Channel Resolution: 4096
11. Operating Current: 30mA (Depending on power supply)
12. Backhaul: Signal/RSSI/Model Battery Voltage
13. Control Distance: 600 meters on the ground

VII. Note of Antenna Installation

To maximize signal transmission, it is advised to:

• Keep antennas as straight as possible; otherwise, the effective control range will be reduced.
• Position the two antennas at a 90° angle to each other, as shown in the diagram.

Diagram Description: Two diagrams show antennas positioned at a 90° angle relative to the R7FG receiver.

• For large models containing metal parts that can interfere with signal emission, position the antennas on both sides of the model to ensure the best signal status in all circumstances.
• Keep antennas at least half an inch away from metal conductors and carbon fiber, and avoid excessive bending.
• Keep antennas away from the motor, ESC, and other potential sources of interference.
• Use sponge or foam material to prevent vibration when installing the receiver.
• The receiver contains high-precision electronic components. Avoid strong vibration and high temperatures.
• Use vibration-proof material like foam or rubber cloth to protect the receiver. Placing the receiver in a well-sealed plastic bag can prevent humidity and dust, which might cause loss of control.

After completing all steps, turn off the transmitter and power it back on to test if the receiver is correctly bound.

Thank you for choosing RadioLink products.