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Introduction
The Tandem (TD) dual-band receivers are unlike any other FrSky 2.4Ghz or 900Mhz receivers, they work
simultaneously at both 900Mhz and 2.4Ghz frequencies. That means TD receivers provide not only low latency
signal and long-range control but also benefit from the enhanced level of high reliability and anti-interference
performance.
The TD SR18 receiver is equipped with triple antenna (2×2.4G & 1×900M) design that provides multi-directional
wide coverage for the remote signal and designed for RC users who want to benefit from resilience and
long-range in their radio communications.
TD SR18 also provides a socket that can be used to connect the NFC Switch panel to enable the built-in Power
Switch function. Dual-power provides a safe and efficient way to power the system with your power sources
connected via a pair of standard XT30 connections. The dual-power consumption system is designed to operate
in balance mode, where it consumes the power line from either power source depending on which has the higher
voltage. With a built-in black box module, the data (Power & Signal related) under unusual status during the flight
can be recorded by TD receivers.
The configurable 18-channel ports are a big feature of TD SR18, each channel port can be assigned as PWM,
SBUS, FBUS, or S.Port. With the FBUS protocol, the Tandem series receivers can open up the possibility of
seamlessly pairing with multiple telemetry devices (Neuron ESC, Advance Sensors, etc.) as well as simplifying
the builds setup.
ADV Stabilizer
The TD SR18 offers an ADV Stabilizer function which is an upgrade over the original classical gyroscope
stabilization modes. The ADV Stabilizer offers an advanced mode that provides more programmable stabilized
channels and flexibility.
The classical stabilization mode has been enhanced with 5 additional stabilization channels, providing pin
mapping to each channel in the multiple flight modes like Stabilization, Auto-Level, Hover, and Knife-Edge with
an airplane model.
In the advanced stabilization mode, all the output pins are configurable for stabilization and additional advanced
features such as Stab file sharing, programmable parameters, and developer access, etc.
The advanced stabilizer feature incorporates high-precision telemetry sensors to monitor altitude, vertical speed,
etc. This ADV feature is an additional benefit compared to using a regular S series stabilization receiver.
Overview
16mm
FrSky Electronic Co., Ltd.
Add: F-4,Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Technical Support: sales4tech@gmail.com
Instruction Manual for FrSky TD SR18 Receiver
Switch
GND
9
VOUT
S
10 11 12 13 14 15 16 17 18
VCC
AIN (max: 35V)
GND
www.frsky-rc.com
53mm
8
7
6
5
4
3
2
1
Contact us : frsky@frsky-rc.com
Version
1.0
2.4G Antenna
2.4G Antenna
900M Antenna

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Summary of Contents for FrSky SR18

  • Page 1 TD SR18 also provides a socket that can be used to connect the NFC Switch panel to enable the built-in Power Switch function. Dual-power provides a safe and efficient way to power the system with your power sources connected via a pair of standard XT30 connections.
  • Page 2: Specifications

    Version Instruction Manual for FrSky TD SR18 Receiver Specifications ● Frequency: 900MHz & 2.4GHz ● Dimension: 53*40*16mm (L*W*H) ● Weight: 29.1g ● Operating Voltage: 4-10V(Recommend 2S Li Batteries) ● Operating Current: ≤195mA ● Continuous Current: ≤30A (power the device) | Instaneous Current: ≤60A (power the device) ●...
  • Page 3 Version Instruction Manual for FrSky TD SR18 Receiver Registration & Automatic Binding Follow the step below to finish the registration & binding procedure: 1. For TANDEM X20 as an example, enter into the Model, select RF System, turn on the internal module, select status [ON] and TD MODE(Type).
  • Page 4 Version Instruction Manual for FrSky TD SR18 Receiver CaliHorizontal Function Enable the CaliHorizontal mode can do the calibration for the horizontal plane. Note: This "CaliHorizontal" function is only activated for ADV mode horizontal calibration. It doesn't work while using the basic mode.
  • Page 5 (Place the decompressed folder in the root directory of the [Scripts] folder on the memory card to use.) Gyroscope Sensor Calibration Ensure the TD SR18 stabilization function is enabled. [System] → [SRX Stable] [SRX Stable] → [Stabilizing] → [On] Move to [SRX Calibration] tool and calibrate the gyroscope sensor 1.
  • Page 6 Version Instruction Manual for FrSky TD SR18 Receiver FrSky Electronic Co., Ltd. www.frsky-rc.com Contact us : frsky@frsky-rc.com Add: F-4,Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Technical Support: sales4tech@gmail.com...
  • Page 7 Version Instruction Manual for FrSky TD SR18 Receiver Servo connection & Build the device to the model Connect the servos to the ports of the stabilization device according to the Channel List. Forward Default Note: Please make sure the side with the External Switch Port forwards the nose direction of airplane model, and with a Single Screw Tab backward.
  • Page 8 Version Instruction Manual for FrSky TD SR18 Receiver Move to the [SRX Stable] tool, determine the [WingType] & [Mounting Type]; Wing Type Mounting Type [Gain] and [Offset] configurations of flight modes Gain - Stab Mode Gain - Knife Mode Gain - Auto-Level Mode...
  • Page 9 Version Instruction Manual for FrSky TD SR18 Receiver When the plane is rotated left or right (Roll), ailerons should have the correcting actions as illustrated. When the plane is rotated up or down (Pitch), elevators should have the correcting actions as illustrated.
  • Page 10: Self Check

    CH14. What’s more, an emergency mode is added to configure automatic level mode default through CH16. The precise configuration is written below. Note: The default mode of TD SR18 is Quick Mode. - If Quick Mode is applied, there is no Knife Edge or (3D) Hover Mode.
  • Page 11: Conventional Mode

    Version Instruction Manual for FrSky TD SR18 Receiver Conventional Mode It supports stabilization mode and manual (Gyroscope is off) mode and configured through CH14&15. The precise configuration is Written below. Automatic Flight mode Stabilization Hover Knife-Edge level CH14 (3 pos SW)
  • Page 12 1. When Delta wing/Flying wing is selected, the signal produced by the transmitter should be without active mixes on the channels related to AIL and ELE. TD SR18 will mix the AIL (CH1) and ELE (CH2) input signal with a fixed mix percentage automatically.
  • Page 13 Version Instruction Manual for FrSky TD SR18 Receiver How to switch the S.Port/SBUS OUT/SBUS IN/FBUS Enter into the [Set] of receiver. Select the FBUS/S.Port/SBUS Out/SBUS In for the channel ports. How to switch SBUS channel mode Enter into RX Settings.
  • Page 14: Range Check

    Version Instruction Manual for FrSky TD SR18 Receiver About OTA function Go to the [File manager], and select the FW, press the enter button, select [Flash RX by int.OTA]. Power on the receiver, select the RX, go to the [ENTER], complete the flash process, the transmitter will display [Success].
  • Page 15 - Consult the dealer or an experienced transmitter/TV technician for help. FrSky is continuously adding features and improvements to our products. To get the most from your product, please check the download section of the FrSky website www.frsky-rc.com for the latest update firmware and manuals FrSky Electronic Co., Ltd.

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