JUMPER T-20 2.4Ghz Full Size Radio EdgeTX Remote Controller User Guide

JUMPER T-20 2.4Ghz Full Size Radio EdgeTX Remote Controller

Product Information

This product complies with the Federal Communications Commission (FCC) radiation exposure limits for an uncontrolled environment. It is designed to ensure that the level of radiation emitted by the equipment is within safe limits when used as directed.

Minimum Distance Requirement: To maintain compliance with FCC regulations, it is important to install and operate this equipment with a minimum distance of 0cm (zero centimeters) between the radiator and your body.

Product Usage Instructions

1. Ensure the product is placed or installed in a suitable location.
2. Position the equipment in such a way that there is no physical contact between the radiator and your body.
3. Maintain a minimum distance of 0cm (zero centimeters) between yourself and the equipment while it is in operation.
4. Avoid placing any objects or materials between yourself and the equipment that could obstruct the radiation path.
5. Follow any additional safety guidelines provided in the user manual or accompanying documentation.

Please adhere to these usage instructions to ensure compliance with FCC regulations and minimize any potential risks associated with radiation exposure.

Introduction

Thank you for purchasing the Jumper. T-20 Radio system. Please read this instruction manual carefully before use to ensure correct and safe use. Due to version upgrades, there have been changes. The information contained in this manual is subject to change without notice. Many radio control models are equipped with powerful motors and sharp spinning propellers. Please exercise caution when working on models. Ensure power is disconnected from your models and remove propellers when performing maintenance. Do not operate the T-20 radio system under the following conditions . During bad weather or high wind conditions such as rain, hail, snow, storms, or electromagnetic events.

• During any conditions of limited visibility.
• In areas where people, property, powerlines, roads, vehicles or animals may be present.
• If you are feeling tired or unwell or under the influence of drugs or alcohol.
• If the radio or model appears to be damaged or not functioning correctly.
• In areas of high 2.4ghz interference or in locations where the use of 2.4ghz radios is prohibited
• When the battery is the T-20 or the model is too low to function.

OpenTX / EdgeTX is an experimental firmware. No warranty or implied warranty is given as to the quality and reliability of this firmware. The RC model can cause serious injury or even death if not handled properly. If you decide to use OpenTX / EdgeT firmware, you will be solely responsible for your model. Any injury or damage caused by the use of Open / EdgeT firmware. The author of OpenT× / EdgeT is not responsible for it. Pleaseuse it with caution.

• Open firmware can be found here: https://github.com/opentx
• Edge firmware can be found here: https://edge-tx.org
• Multi-protocol firmware can be found here: https://downloads.multi-module.org
• ExpressLRS: https://www.expressirs.org

Note: In order to prevent T-20 from entering FU mode during charging, to reduce the probability of losing firmware during charging, T-20 is the first radio that has a separate BOOT button. When the radio is shut down, press and hold the BOOT button, connect the USB cable, the system will enter DFU mode.

First Boot

Long press the power button. Before entering the main interface, the system will check the position of the throttle stick and switch and other startup conditions. If the startup conditions are not met, there will be a corresponding error prompt. The user needs to clear or press any key to skip.

EEprom Warning:
Bad EEprom data. Press any key to let the radio automatically format and storage to create new remote control data files.

Switch Warning:
This is a warning that a switch on the radio -control is not in the default position. (The default setting is that all switch directions are up)

Throttle Warning:
This is a warning that the throttle is not at the lowest position when the radio is turned on. You can set the throttle stick to the lowest position or press any key to skip. You can also turn off the throttle state option in the MODEL SETUP menu.

Failsafe Not Set Warning:
This is a warning that the radio- control is not set for fail-safe.

Alarms Warning:
A similar warning will appear if the sound mode of the remote control settings page is set to mute.

SD card Warning:
This warning will appear if the version of the SD card file used does not match the firmware version. (SD card contents also need to be updated at the same time as upgrading firmware)

RSSI Warning:
This is a warning that the Disable alarms are set.

Main Screen Display:
The default screen is as below, and the user can press the (PAGE) key to display different interfaces.

Model Setup and Selection:
In the main interface, press the SYS button to get into the model select menu The Model Select menu allows the user to select the active model and allows the user to create, copy, move or delete a model. By selecting the “Create model* option, the new model guide (the script required by the guide is in the SD card) will be launched. The user will be leading through the basic control setup, if you choose not to use it, just press RT Keys to manually set the model. To create a model, press and hold the ENT key to show the menu, select create model, press ENT

With the plane, delta, and multiaxial options, the guide will check with you questions about model configuration. And make basic settings for users. The final step of the quide confirms the channel assignment for the model If the user prefers manual setup, press RT to exit the guide. Use the menu wheel to select the one you want to make with the model, long-press the ENT key to select the Select model to switch it.

Binding and Frequency Tunning

Short press the SYS button, then use the scroll wheel to select 2/13

Internal RF:

• Mode: The transmission mode of the internal RF. It must be compatible with the receiver. Otherwise, it will not be able to bind.

• OFF: Turn off the internal RF module

• Type: Select the type of protocol

• Subtype: Select the subtype of the protocol

• Status Display the status of the multi-protocol module. (Normally it shows the firmware version of the multi-protocol module)

• Ch.Range: Set up the channel range. (D16 mode transmits data at every 9ms, 8 channels at a time, 16 channels will take 18ms, so removing unnecessary channels can reduce the latency)
  Receiver: Normally it is the receiver model. It can be changed manually. If the model is moved or copied, it will not be changed. If the manual setting or copy/ move steps cause the receiver with the same number to have 2 or more models, a warning window will pop up. It is up to the user to decide whether it needs to be modified

• Freqtune: Frequency tuning. Certain protocols require tuning for optimal performance. In some cases, tuning is required in order for the protocol to bind. Frequency Tuning is specific to each MULTI-Module, and is due to very small variations in the
  RF components.
  Frequency Tuning is always recommended, but especially when:

1. It is difficult to bind to the receiver, or the connection is weak or intermittent
2. The control range is very short
3. Telemetry data is not received or (for telemetry-enabled receivers only) Completing the Frequency Tuning Procedure ensures that the radio and receiver will have the strongest possible connection. If you change the frequency tuning value it is best to re-bind the receivers)

The default value of Freqtune is “O’. If the receiver does not bind, we can change the value to either +30 or -30 and try to bind again. If binding is still unsuccessful, continue to try higher and lower values in steps of plus or minus 30 until the bind succeeds. Once the receiver is bound you can proceed with Fine Tuning. After the binding succeeds, keep the receiver 2 meters away from the radio and don’t move any of them. Return to the RF Freq. fine-tune option. Lower the value until the radio loses the connection with the receiver. Record the value (TUNE_MIN). Raise the value so that the connection is restored, then continue to raise it until the radio loses the connection with the receiver again. Record the value (TUNEMAX). Calculate the median between the two values (TUNE MIN + TUNE MAX) / 2 = TUNE MEDIAN. Set RF Freq. fine-tune to the median value.

For example

• Connection is lost at 60 and -60, then the Freqtune number is (-60+60) /2-0
• Connection is lost at 20 and -80, then the Freqtune number is (-80+20/2=30

Model Setup

The model setup covers all the required preliminary setups. setups.The Model Setup page contains the following features:

1. Defines the model’s name

2. Up to 3 fully programmable timers that can count up or down

3. Extended limits allow setting servo movement limits up to 125%

4. Extended trims allow trims to cover the full stick range instead of +/-25% 5. The trim step sets the precision of trim clicks

5. Throttle reverse: Ensures correct operation of throttle-based timers and functions for people who like having full throttle with the stick down

6. The throttle source defines what triggers the THx functions of the timers.
   The model setup covers all the required preliminary setups. setups. The Model Setup page contains the following features:

7. Throttle trim: IC engine mode, where trim only affects the idle part of the throw without touching the full-throttle point

8. Throttle Warning: Will warn you if the throttle stick is not at idle when the radio is powered up or a model is loaded

9. Preflight checks: display checklist, throttle state, switch positions, pot positions

10. Center beep: Makes a beep when the selected controls) pass the center point

11. Internal RF module setting

12. External RF module setting

13. Trainer mode setting Press the SYS button and use the scroll wheel to select the model you want to set (after selecting the model name, there will be a * logo before the model name)Then press the PAGEkey to enter the Model Setup page

Outputs (center adjustment, servo reverse setting):

Short press the SYS button and then use the scroll wheel to select the 7/13 page

• Select the channel you want to set up
• center adjustment Low and high limits setting Subtrim behavior

Channel Monitor
press the “page” button in the main interface you can switch input and output monitor

Set the default gimbal mode

T-20 is set to MODE2 (the left-hand throttle) out of the factory. The user can change the mode by himself by reversing the gimbals, and then long-press the “SYS” key to enter the “RADIO SETUP” page, turn to the bottom to “mode”, and select the corresponding mode

Calibrating Gimbals (Gimbals have been calibrated when it was out of
the factory. No need to re-do the calibration unless it is necessary): Press and hold SYS button, scroll to the HARDWARE page. Go to the “Sticks(calibration]” page to start gimbal and wheel calibration Attn: Do not put too much force during the calibration process to avoid affecting the calibration accuracy. Move slightly during the calibration process.

• press ENT to start calibration
• place all the gimbals, knobs, and side sliders in the middle position,and then press the ENT key
• move all the gimbals, knobs, and side sliders to their respective maximum and minimum positions, and then press the ENT key to complete the calibration

Battery and Charging

Please use two 21700 batteries under the same brand and model (with the same internal resistance) to power the T-20. Make sure that the anode and cathode are not reversedwhen inserting the battery, T-20 has a built-in USB charging function. You can connect the radio to a USB to charge the battery.Charging indicator: the green light flashes when the radio is not inserted with batteries; the green light is always on when the battery is charging; the green light is off when the charging is complete. Attn: When the battery is installed in the T-20 for the first time, please keep the battery voltage consistent to reduce the burden on the voltage balance circuit.

Firmware Update

There are two ways to update open firmware.

1. Update the firmware by open companion. (For more details, please refer to T-20 Manual)
2. Update firmware via SD card (if passed over 1version, please use the first method to update)

If your device is not in the Windows system, please use the 2nd method. This is a BOOTLOADER function designed by the OPENTX developer team, efficient and simple. The upgrade requires two steps. Firstly, copy the firmware downloaded from openT website to the SD card “FIRMWARE” folder. Secondly, find the firmware file you just copied in the remote control SD card, and long-press the ENT key to upgrade the bootloader (as shown below)

After booting, select the Write Firmware option and select the corresponding firmware to upgrade

• Press the trim buttons inward and turn on the radio

Update firmware of JP4IN1 module via Radio

The firmware version of the module needs to be newer than version 1.2.1.85 to use the remote control to upgrade the module firmware. Otherwise, you need to use USB and TTL hardware to connect the module to upgrade the firmware Firmware download link: https://downloads.multi-module.org Firstly copy the firmware of the module into the radio file folder “FIRMWARE” (same folder as the one used for the radio firmware update), then disconnect the computer and radio controller, open the SD card “FIRMWARE” folder, select the firmware that just copied and long-press ENT key (as shown below)

Flash Int.Multi:
To update firmware of internal RF module

Flash Ext.Multi:
To update firmware of External RF module

ExpressLRS:

• https://www.expressirs.org
• For more tutorials, please refer to the manual

FCC Statement

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 radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harm full interference to radio 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 the receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment. 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, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance 0cm between the radiator and your body.

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