KAVAN R6L - User manual

Introduction

Congratulations on your purchase of the KAVAN R6L, a 6-channel telemetry receiver. It operates on ACCESS transmission system and has 6 high-precision PWM channels and 16 or 24-channel modes using S.BUS. Thanks to its compact size and light weight, it is especially suitable for small models and low-profile compartments, but you can use it for a variety of other models as well. With redundancy support, it can be connected as a primary receiver via S.BUS. Thanks to the F.BUS connection option, you can also pair it quickly and easily to several different telemetry devices.

It features advanced interference suppression for reliable stable signal transmission across the entire range. Smart Match system speeds up pairing. The black box function stores essential flight data. Receiver operating statuses are indicated by an LED indicator. Smart pairing allows firmware updates wirelessly.

It is also available in a Stabi version, which provides more accurate and faster measurement and transmission of altitude and vertical speed data. It also allows instant audio feedback from the variometer to the ACCESS transmitters.

If you have any questions about the R6 receiver and its operation, please contact the technical support and service staff at KAVAN Europe s.r.o. by e-mail (info@kavanrc.com for general technical information, servis@kavanrc.com for service) or by phone (+420 466 260 133 for general technical information, +420 463 358 700 for service), during business hours 8 am–4 pm, Monday–Friday).

Technical specifications

• Dimensions: 45×18.5×9.7 mm (L×W×H)
• Weight: 5.6 g
• Number of channels: 6 PWM channels + 16/24 channel mode via S.BUS
• Operating voltage range: 3.5–10 V
• Operating current: <65 mA at 5 V
• Operating range: >2 km (depends on ambient conditions)
• Vario - vertical speed measurement range: ±10 m/s (R6L Stabi)
• Vario - altimeter range and resolution: -700 m to 10,000 m, 0.1 m (R6L Stabi)
• External voltage measurement range via AIN2: 0–35 V (battery voltage divider ratio: 1:10)
• Operating range: 2 km (full range, may vary depending on actual ambient conditions)
• Antenna connector: IPEX1
• Max. radiated power: < 20 dBm
• Operating frequency: 2.400–2.4835 GHz
• Compatibility: 2.4GHz ACCESS transmitters

Features

• Enhanced anti-RF-interference capability with more solid RF performance
• Smart-matched ACCESS mode
• Built-in stabilisation functions (R6L Stabi)
• Built-in high-precision telemetry sensor (R6L Stabi)
• 6 High-precision PWM Channel Ports
• SBUS Out Port (supports 16/24CH mode)
• SBUS In Port (supports signal redundancy)
• Full control range with telemetry (FBUS/F.Port/S.Port)
• Over-The-Air (OTA) firmware updates
• External battery/device voltage detection

LED indicator

Green	Red	Status
On	On	Registration
Blinking	Blinking	Registration complete
On	On	Pairing
On	Off	Pairing complete
On	Off	Working properly
Off	On	Fail-safe mode

Blue	Status (calibration)
On	Limits exceeded (0.9–1.1G)
Off	Normal operation
Blinking	Calibration complete

Registration and pairing

Before you can start using your receiver, you must first register it:

1. Turn on the internal module of your transmitter.
2. Power on the receiver while holding the pairing button pressed. The red and green LED indicators are on, indicating the [Reg] status.
3. Once RID, RX name and UID are shown, press [Register]. The red and green LED indicators are blinking.
4. Power off the receiver.

After registration, commence the pairing:

1. Select an empty receiver slot and press [Bind].
2. Power on the receiver.
3. Once the receiver is shown on the display, select it. The green LED indicator is on.
4. The pairing process is confirmed by a [Bind successful] message in the transmitter.

Note: Once the receiver is registered, repeating the registration is not necessary for pairing.

Stabilisation functions (R6L Stabi)

Configuration

Note:
ETHOS V1.6.1 (or later version) is required.
Stabilizer Config V3.0.10 (or later version) is required.

1. Ensure stabilisation is enabled & Complete the 6-axis calibration for the gyroscope
2. Servo connection & Build the stabilisation device for the model
3. Set up the mixer channels and input controls
4. Determine the [Wing Type] & [Mounting Type]
5. Gain and Offset settings for stabilised flight modes
6. Stabilised channel output checks in Auto-Level mode
7. Radio stick control checks in Manual mode
8. Calibration (Level, Stick Center & Range) for Stab Group 1 & 2
9. Angle Mode - Roll/Pitch Degree Configuration (Optional)

Note: Navigate to [ETHOS Suite] → [Lua library] → [StabilizerConfig] section to download the latest functional Lua scripts. Place the extracted folder with the Lua script in the root directory of the [Scripts] folder on the memory card to use.

Gyroscope calibration

Device Config] → [Receivers] → [Stabilizer Config] → [Stabilizer Group / Configuration] → [Stabilizer / On]

Step 1: Ensure the Stabiliser is turned ON for both Stabilizer Groups 1 and 2.

[Device Config] → [Receivers] → [Stabilizer Config] → [6-axis calibration / Open]

Step 2: Complete the 6-axis calibration for the gyroscope.

Note:
The gyroscope of the device (6 surfaces) must be calibrated before mounting it into the model. Place the device on a flat surface and follow the steps to finish the calibration.
Once the calibration of all the device surfaces is complete, the accelerator telemetry values of each axis (AccX, AccY and AccZ) are about 1.000 gravity while the device is placed in the corresponding direction. The deviation is ±0.1.

Servo connection

Connect each control function of your aircraft to the stabilised receiver ports according to the table below.

Note: Correct placement of the stabilised receiver is crucial. Ensure the label is facing upwards and the antenna connector forwards to the nose of the model. Stabilised receiver should always be placed in the centre of the fuselage for correct axis reading.

Channel	Control	Function
CH1	AIL 1	Aileron
CH2	ELE 1	Elevator
CH3	THR	Throttle
CH4	RUD	Rudder
CH5	AIL 2	Aileron
CH6	ELE 2	Elevator
CH7	AIL 3	Aileron
CH8	ELE 3	Elevator
CH10	AIL 4	Aileron
CH11	ELE 4	Elevator
CH12	User-defined	/
CH13	User-defined	Gyro gain
CH14+CH15	User-defined	Flight modes

CH3 Gyro gain: When the the CH13 value is in the centre, the gain is zero. The gain increases with the value, reaching the maximum when the value is ±100.

Mixer settings

In the Mixer setting of your radio, map the correct control functions to each channel.

OTA ("Over The Air") firmware update

Navigate to [File Manager] and select the firmware file. Press the enter button and select [Flash RX by int.OTA]. Power on the receiver, select RX and confirm by pressing [ENTER]. Complete the flash process and the transmitter will display [Success]. Wait for 3 seconds for the receiver to start working properly.

Caution:
Do not perform the Pairing/Registration close by during the firmware update.
Only update the receiver after it is registered (OTA).

Range check

A range check should be performed before each flight in case a loss of signal is caused by reflection from metal or concrete structures, and the blocking of the signal by buildings or trees during flight.

1. Place the model at least 60 cm on a non-metallic support (such as a wooden bench). The receiving antenna should be in a vertical position.
2. In the operating system, navigate to "RF system", select the "RANGE" mode and press [ENTER]. In the range check mode, the effective range will be reduced to 1/30.

Fail-safe emergency rates

When Fail-safe is turned on, 3 modes are available: No signal, Hold, Custom.

No signal: When the signal is lost, the receiver does not send a control signal to rates on any channel. To use this mode, select it from the menu and wait 9 seconds for the Fail-safe setting change to take effect.

Hold: The receiver keeps the rates as they were before the signal was lost. To use this type, select it from the menu and wait 9 seconds for the Fail-safe setting change to take effect.

Custom: The receiver keeps the rate values on all channels as you preselect them. Select the Fail-safe setting menu. Switch from Disconnect/Hold/Not Set to "Custom". Select the channel for which you want to set fail-safe rates and confirm the selection. Then set the rates on each desired channel and confirm the selection. Wait 9 seconds for the Fail-safe setting change to take effect.

Note: If the fail-safe is not set, the model will always operate with the last functional state of the channels before the signal loss. This could potentially cause damage. If the fail-safe is disabled on the RF module side, the receiver will go to the default Hold mode. Do not set the Fail-safe mode for the S.BUS port to No Signal mode, as the signal would be continuously transmitted. Set the S.BUS port to Hold or Custom mode instead.

Warranty and post-warranty service

All KAVAN® electronic products are covered by a 2-year warranty covering all manufacturing defects and faults. When claiming within the warranty period, please always present a copy of the proof of purchase with the product and provide the service personnel with as detailed and complete information as possible about the defect found, your usage and other information that will facilitate the assessment of the claim and speed up its settlement.  Please make your claim at the shop where you purchased the product. If this is not possible, you can contact KAVAN Europe s.r.o. directly:

KAVAN Europe s.r.o. | Doubravice 110, 533 53 Pardubice | Czech Republic | +420 466 260 133 | info@kavanrc.com

Warranty and limitation of liability

As the manufacturer of this product, we have no control over your compliance with these instructions when wiring and installing the receiver into your model. Likewise, we have no control over how you build, operate and maintain the parts of the receiver. For this reason, KAVAN must disclaim all liability for any loss, damage or financial cost that is caused by the improper use or operation of products imported by us, or that is in any way connected with such activity.

Except as otherwise provided by law, KAVAN's obligation to pay compensation shall (regardless of the legal arguments asserted) be limited to the purchase price for those KAVAN products that were directly involved in the event that caused the damage. This does not apply if the manufacturer has been judicially obliged to make unlimited compensation on the basis of proven wilful or reckless negligence. We warrant that our products are in compliance with current legal provisions. The warranty does not cover failures and defects caused by:

• Misuse or improper use.
• Delayed, improper or no maintenance, or maintenance performed by an unauthorised service.
• Incorrect wiring.
• Use of accessories not approved or recommended by KAVAN Europe s.r.o.
• Modifications or repairs not carried out by an authorised KAVAN Europe s.r.o.
• Inadvertent or deliberate damage.
• Normal wear and tear.
• Operation of the equipment outside the operating limits specified in the specification

KAVAN Europe s.r.o. warrants that this product is free from defects in both material and workmanship at the time of sale. KAVAN Europe s.r.o. also reserves the right to change or modify this warranty without notice. The equipment is subject to continuous improvement and refinement - the manufacturer reserves the right to change the design without notice.

This warranty certificate entitles you to a free warranty repair of the product supplied by KAVAN Europe s.r.o. within a period of 24 months. The warranty does not cover natural wear and tear due to normal use, as this is a product for modelling use, where the individual parts operate under much higher loads than normal toys are subjected to.

The warranty also does not cover any part of the equipment that has been improperly installed, roughly or improperly handled, or damaged in an accident, or any part of the equipment that has been repaired or altered by an unauthorised person (this includes the application of any waterproof sprays/coatings by the user). Like other fine electronics products, do not expose this equipment to high temperatures, low temperatures, moisture, dusty environments, violent mechanical shocks and impacts. Do not leave it in direct sunlight for extended periods of time.

Recycling (European Union)

Electrical equipment bearing the crossed-out bin symbol must not be disposed of in normal household waste but must instead be taken to a specialised collection and recycling facility. In EU (European Union) countries, electrical equipment must not be disposed of in normal household waste (WEEE - Waste of Electrical and Electronic Equipment, Directive 2012/19/EU). You can take unwanted equipment to your nearest collection or recycling centre. The equipment will then be disposed of or recycled safely, free of charge. By handing in your unwanted equipment, you can make an important contribution to protecting the environment.

EU declaration of conformity

KAVAN Europe s.r.o. hereby declares that the radio equipment type: R6L (Stabi) and other equipment supplied with it comply with Directive 2014/53/EU. The full form of the EU Declaration of Conformity is available at the following website: http://www.kavanrc.com/doc. This 2.4GHz radio equipment can be used without prior registration or individual approval in all countries of the European Union.