1.0 Introduction
The Fosmon 3x1 HDMI Intelligent Switch is designed to expand the HDMI connectivity of your HDTV, monitor, or projector. It provides three HDMI input sources, allowing you to connect multiple devices and switch between them seamlessly. This switch supports 4K resolution at 30Hz, Deep Color, HDR, Ultra HD, HDCP pass-through, and various uncompressed/compressed audio formats. It is also backward compatible with 1080p at 60Hz and other resolutions.

Image: The Fosmon 3-Port HDMI Switch, a compact black device with three input ports and an integrated pigtail HDMI output cable.
2.0 Package Contents
- 1 x Fosmon 3-Port HDMI Switch
- 1 x User Manual
3.0 Features
- 3 HDMI Inputs / 1 HDMI Output: Connect up to three HDMI source devices to a single display.
- 4K@30Hz Support: Supports resolutions up to 4K at 30 frames per second, along with 36-bit Deep Color, 3D, and various audio formats.
- HDCP Pass-through: Compatible with HDCP content protection.
- Automatic Input Switching: Intelligently switches to the active input source when a signal is detected.
- Manual Switching: Includes a button for manual selection between connected devices.
- Powered by Connected Devices: Typically requires no external power adapter, drawing power directly from connected HDMI sources.
- Supported Audio Formats: Supports uncompressed audio (e.g., LPCM) and compressed audio (e.g., DTS Digital, Dolby Digital, DTS-HS, Dolby TrueHD).

Image: The HDMI switch shown with a vibrant 4K Ultra HD HDR display, highlighting its support for the latest video standards.
4.0 Setup and Installation
Follow these steps to set up your Fosmon 3-Port HDMI Switch:
- Connect to Display: Plug the attached pigtail HDMI cable from the Fosmon switch into an available HDMI input port on your HDTV, monitor, or projector.
- Connect Source Devices: Connect your HDMI source devices (e.g., game consoles, Blu-ray players, streaming devices, computers) to the Input 1, Input 2, and Input 3 ports on the Fosmon switch.
- Power: The switch is typically powered by the connected HDMI devices. Ensure your source devices provide sufficient power. If the switch does not function correctly, ensure all connected devices are powered on or try connecting a device that provides more power.

Image: A diagram illustrating how to connect various HDMI source devices (game console, media box, Blu-ray/DVD player, cable box, computer) to the three input ports of the Fosmon HDMI switch, which then connects to a TV or projector.
Video: An official product video demonstrating the features and setup of the Fosmon 3-Port HDMI Switch, highlighting its compact design and ease of use.
5.0 Operating Instructions
The Fosmon 3-Port HDMI Switch offers both automatic and manual switching capabilities:
5.1 Automatic Switching
The switch is designed to automatically detect and switch to a newly activated HDMI source. For example, if you turn on a game console connected to Input 1 while other devices are off, the switch will automatically select Input 1.
Note:
Automatic switching works best with devices that do not output continuous voltage over the HDMI port when turned off. If a device outputs a continuous signal even when "off" (e.g., in standby mode), the switch may not automatically switch away from it. Powering on a device gives it output priority over other devices. If the current output device is turned off, priority is given to the next active device on the switch.
5.2 Manual Switching
To manually switch between connected HDMI sources, press the "Select" button located on the top of the switch. Each press will cycle through the available inputs (Input 1, Input 2, Input 3).

Image: The Fosmon HDMI switch with its select button and indicator lights, demonstrating its hassle-free switching capability when a PlayStation 4 is powered on.
6.0 Maintenance
To ensure optimal performance and longevity of your HDMI switch:
- Keep the device in a dry, dust-free environment.
- Avoid exposing the switch to extreme temperatures or direct sunlight.
- Clean the exterior with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Ensure HDMI cables are securely connected to prevent signal loss.
7.0 Troubleshooting
If you encounter issues with your Fosmon 3-Port HDMI Switch, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No picture/signal on TV. | Insufficient power to the switch; incorrect input selected; loose cable connections; incompatible HDCP version. | Ensure all connected devices are powered on and providing sufficient power. Press the "Select" button to cycle through inputs. Check all HDMI cable connections. Note that the switch may not be compatible with devices requiring HDCP 2.2. |
| Automatic switching not working. | Source device outputs continuous signal even when off. | Manually switch inputs using the "Select" button. Ensure devices are fully powered off if automatic switching is desired. |
| Picture quality issues (flickering, distortion). | Faulty HDMI cable; resolution/refresh rate incompatibility; long cable run. | Try a different HDMI cable. Ensure your display and source device support the selected resolution and refresh rate (e.g., 4K@30Hz). Use high-quality, shorter HDMI cables if possible. |
8.0 Specifications
- Model: HD8061
- Inputs: 3 x HDMI
- Output: 1 x HDMI (pigtail cable)
- Supported Resolutions: Up to 4K@30Hz, 1080p@60Hz, and backward compatible.
- Deep Color: 12-bit Deep Color per channel (36-bits across all channels).
- 3D Support: Yes
- HDCP: HDCP Pass-through (Note: May not be compatible with HDCP 2.2 devices).
- TMDS Throughput: 8.91Gbps max.
- Audio Support: LPCM, DTS Digital, Dolby Digital, DTS-HS, Dolby TrueHD.
- Dimensions: 7.08 x 0.39 x 6.29 inches (approx. 180 x 10 x 160 mm)
- Weight: 3.17 ounces (approx. 90 grams)
- Color: Black

Image: The Fosmon HDMI switch with its dimensions (3 in / 76 mm, 0.68 in / 17 mm, 3.2 in / 82 mm) clearly marked, shown next to a US quarter for scale.
9.0 Warranty and Support
Fosmon offers a Limited Lifetime Warranty for this product. For warranty claims or technical support, please contact Fosmon customer service. Details can be found on the official Fosmon website or through your retailer.
Fosmon Customer Service: www.fosmon.com/support





