How to Use Readytosky Ultra2500 VTX 4,9G-5,8G 2,5 Вт: Examples, Pinouts, and Specs

The Readytosky Ultra2500 VTX is a high-performance video transmitter (VTX) designed for FPV (First Person View) applications. Operating in the 4.9GHz to 5.8GHz frequency range, it delivers a powerful 2.5-watt output, ensuring clear and stable video transmission over long distances. This VTX is ideal for drone racing, aerial photography, and other FPV setups where reliable video transmission is critical.

• FPV drone racing and freestyle flying
• Aerial photography and videography
• Long-range FPV systems
• Remote-controlled vehicles and robotics

The following table outlines the key technical details of the Readytosky Ultra2500 VTX:

The Readytosky Ultra2500 VTX features a simple pinout for easy integration into FPV systems. Below is the pin configuration:

1. Power Connection: Connect the VCC pin to a power source within the range of 7V to 28V. Ensure the power supply is stable and capable of providing at least 1.2A at 12V.
2. Video Input: Connect the VIDEO pin to the video output of your camera. Ensure the camera is configured to output an NTSC or PAL signal.
3. Antenna Installation: Attach a compatible SMA antenna to the VTX before powering it on to prevent damage to the transmitter.
4. Channel and Band Selection: Use the CH+ and BAND+ buttons to select the desired frequency channel and band. Refer to the included frequency table in the product manual for available options.
5. Audio Input (Optional): If audio transmission is required, connect an audio source to the AUDIO pin.

• Antenna Safety: Always connect an antenna before powering on the VTX to avoid damaging the internal circuitry.
• Heat Management: The VTX can become hot during operation, especially at high power levels. Ensure adequate airflow or install a heatsink to prevent overheating.
• Frequency Selection: Choose a frequency channel that minimizes interference with other devices in the area.
• Regulatory Compliance: Verify that the selected frequency and power output comply with local regulations for RF transmission.

While the Readytosky Ultra2500 VTX does not directly interface with an Arduino, you can use an Arduino to control its power or monitor its status. Below is an example of using an Arduino to toggle the VTX power via a relay:

// Example: Controlling VTX power using an Arduino and a relay module

const int relayPin = 7; // Pin connected to the relay module

void setup() {
  pinMode(relayPin, OUTPUT); // Set relay pin as output
  digitalWrite(relayPin, LOW); // Ensure relay is off at startup
}

void loop() {
  // Turn on the VTX
  digitalWrite(relayPin, HIGH); 
  delay(10000); // Keep VTX on for 10 seconds

  // Turn off the VTX
  digitalWrite(relayPin, LOW); 
  delay(5000); // Keep VTX off for 5 seconds
}

Note: Ensure the relay module is rated for the VTX's input voltage and current.

1. No Video Signal

   • Cause: Incorrect wiring or incompatible video format.
   • Solution: Verify the VIDEO pin connection and ensure the camera is outputting an NTSC or PAL signal.

2. Overheating

   • Cause: Insufficient airflow or prolonged operation at high power.
   • Solution: Add a heatsink or improve ventilation around the VTX.

3. Interference with Other Devices

   • Cause: Overlapping frequency channels with nearby devices.
   • Solution: Change the frequency channel and band to avoid interference.

4. No Power

   • Cause: Faulty power supply or incorrect voltage.
   • Solution: Check the power source and ensure it provides 7V - 28V with sufficient current.

Q: Can I use this VTX without an antenna?
A: No, operating the VTX without an antenna can damage the transmitter.

Q: How far can this VTX transmit?
A: The transmission range depends on factors such as antenna type, environmental conditions, and interference. With a high-gain antenna and clear line of sight, it can achieve several kilometers.

Q: Is this VTX compatible with all FPV cameras?
A: Yes, as long as the camera outputs an NTSC or PAL video signal.

Q: Can I adjust the power output?
A: The power output is fixed at 2.5W. If adjustable power is required, consider a different VTX model.