HawkSpeed 3 Channel Video Switcher Module

1. Introduction

The HawkSpeed PV3IN1 3 Channel Video Switcher Module is designed for RC FPV (First Person View) camera systems. This module allows users to connect up to three distinct video sources (e.g., FPV cameras) and seamlessly switch between them using a 3-position switch on their ground station or remote control. It incorporates a high-speed video switch chip to effectively reduce video image vibration, ensuring a stable and clear video feed.

Figure 1: Front and back view of the 3 Channel Video Switcher Module.

2. Specifications

3. Package Contents

The package includes:

• 1 x 3 Channel Video Switcher Module (PV3IN1)

Note: Other components such as cameras, transmitters, power supplies, and control switches are not included and must be acquired separately.

4. Setup and Wiring

Careful wiring is crucial for proper functionality and to prevent damage to the module and connected components. Refer to the diagrams below for connection details.

4.1. Module Pinout Overview

Figure 2: Top view of the module, indicating IN1, IN2, IN3, OUT, VCC, GND, and SIG pins.

The module features pins for video input (IN1, IN2, IN3), video output (OUT), power (VCC, GND), and control signal (SIG). The 'in' ports are for video signal input, 'OUT' is for video output. '-' is negative pole, '+' is positive pole (VCC), and 'S' is the receiving video signal.

4.2. Connecting Cameras 1 & 2 and Control Signal

Connect your first two FPV cameras (CAM1 and CAM2) to the respective input pins. Ensure correct polarity for power (VCC, GND) and video signal. The control signal (SIG) from your receiver or flight controller connects to the module's SIG pin.

Figure 3: Wiring diagram for CAM1, CAM2, and control signal input. Note the shared VCC and GND for cameras and the module's power input (5/12V).

• CAM1/CAM2 Connections: Connect the Video, VCC, and GND wires from each camera to the corresponding IN1/IN2 ports.
• Module Power: Connect a 5V or 12V power source to the module's VCC and GND pins. This power source can also supply power to the cameras if they operate at the same voltage.
• Control Signal: Connect the SIG pin of the module to a PWM output channel on your receiver or flight controller.

4.3. Connecting Camera 3 and Video Transmitter

If using a third camera, connect it to the IN3 port. The video output (OUT) from the switcher module connects to your video transmitter (VIDEO TX).

Figure 4: Wiring diagram for CAM3 input and video transmitter output. The module's OUT pin connects to the Video TX input.

• CAM3 Connection: Connect the Video, VCC, and GND wires from CAM3 to the IN3 port.
• Video Output: Connect the OUT pin of the module to the Video Input (VIDEO TX) of your 5.8G video transmitter. Ensure GND is also connected.

4.4. Complete System Integration

The following diagram illustrates a typical complete FPV system setup incorporating the 3 Channel Video Switcher Module.

Figure 5: Example of a complete FPV system with the video switcher, cameras, transmitter, and power supply.

• Ensure all connections are secure and correctly polarized before applying power.
• The power supply for the entire system (e.g., 7-24V) should be appropriate for your video transmitter and cameras, with the switcher module itself requiring 4.8-6V for its operation, often supplied via the receiver's power rail.
• PWM control from your flight controller or receiver will manage the switching between cameras.

5. Operation

Once the module is correctly wired and powered, you can switch between the connected video sources using a 3-position switch on your remote control or ground station.

• Control Channel: The control channel for the switcher can be any proportional channel or a dedicated 3-position switch channel on your RC system.
• 2-Position Switch Limitation: If you use a 2-position switch channel, you will only be able to switch between two of the three video input signals (typically IN1 and IN2, or IN1 and IN3 depending on your RC system's configuration). For full 3-channel switching, a 3-position switch is required.
• PWM Signal Mapping: The module responds to specific PWM pulse widths to select the active video input:
  • IN1: Approximately 1000us (±200us)
  • IN2: Approximately 1500us (±200us)
  • IN3: Approximately 2000us (±200us)
• Configure your remote control or flight controller to output these PWM values on the chosen control channel to correspond with the desired camera input.

6. Maintenance

The 3 Channel Video Switcher Module is a robust electronic component designed for FPV applications. To ensure its longevity and reliable performance, follow these maintenance guidelines:

• Keep Dry: Protect the module from moisture and liquids. Water damage can lead to short circuits and component failure.
• Avoid Extreme Temperatures: Do not expose the module to excessively high or low temperatures. Store and operate it within typical electronic operating temperature ranges.
• Cleanliness: Keep the module free from dust, dirt, and debris. Use a soft, dry brush or compressed air to gently clean the board if necessary. Avoid using liquid cleaners.
• Inspect Connections: Periodically check all wiring connections for looseness or damage, especially after crashes or rough handling. Secure any loose wires to prevent intermittent video signals or power issues.
• Physical Protection: While durable, avoid subjecting the module to severe physical shocks or impacts. Consider mounting it in a protected area within your RC vehicle.

7. Troubleshooting

If you encounter issues with your 3 Channel Video Switcher Module, consider the following troubleshooting steps:

• No Video Signal:
  • Verify all power connections (VCC, GND) to the module and cameras are correct and secure.
  • Ensure the video output (OUT) from the module is correctly connected to the video transmitter's input.
  • Check that the cameras are powered on and functioning independently.
  • Confirm the video transmitter is powered and transmitting.
• Unable to Switch Cameras:
  • Ensure the control signal (SIG) wire is securely connected from your receiver/flight controller to the module.
  • Verify that your remote control's 3-position switch (or proportional channel) is correctly configured and outputting the specified PWM values (1000us, 1500us, 2000us).
  • Test the control channel on your receiver with a servo tester to confirm it's outputting the expected PWM signals.
• Video Image Vibration/Interference:
  • While the module is designed to reduce vibration, excessive interference can still occur. Check for loose video signal connections.
  • Ensure proper grounding for all video components.
  • Separate video signal wires from power wires where possible to minimize electromagnetic interference.
  • Verify that the video signal impedance is correctly matched (75Ω).
• Module Not Powering On:
  • Check the input voltage to the module (4.8-6V). An incorrect voltage can prevent operation.
  • Inspect the module for any visible damage or burnt components.

8. User Tips

• This module is specifically designed and highly effective for RC FPV Camera applications, allowing for versatile multi-camera setups on drones or other RC vehicles.
• For optimal performance, use shielded video cables where possible to minimize interference, especially in noisy electrical environments common in RC models.
• Consider using a dedicated BEC (Battery Eliminator Circuit) to provide clean, stable power to the module and cameras if your main flight battery voltage fluctuates significantly.

9. Warranty and Support

This product is typically covered by a standard manufacturer's warranty against defects in materials and workmanship. Please retain your proof of purchase for any warranty claims.

For technical support, troubleshooting assistance beyond this manual, or warranty inquiries, please contact the retailer or manufacturer directly. Refer to their official website or contact information provided at the time of purchase.

Disclaimer: This product is intended for experienced users in the field of RC FPV. Improper installation or use may result in damage to the product or other components. The manufacturer and retailer are not responsible for damages caused by misuse or incorrect installation.