1. Overview
The GREATHTEK HDMI Extender Over IP (Model GHT-DT243) allows for the extension of HDMI audio and video signals over a single Cat5e/6/7 Ethernet cable. This system supports 1080p@60Hz resolution with no delay and no compression, ensuring high-quality transmission up to 150 meters (492 feet). It features a local loop-out port on the transmitter unit for simultaneous local monitoring and supports one-to-many connections using a Gigabit Ethernet switch.
Image 1.1: Overview of the HDMI Extender units and their key features.
2. Package Contents
Please verify that all items are present in your package:
- 1x HDMI Transmitter (TX) Unit
- 1x HDMI Receiver (RX) Unit
- 2x DC 5V Power Adapters
- 1x User Manual
- 1x After-sale Card
Image 2.1: Contents included in the product package.
3. Setup Instructions
3.1. 1-to-1 Connection
This configuration extends an HDMI signal from a single source to a single remote display, with an optional local display.
- Connect your HDMI source (e.g., PC, PS4, TV Box) to the HDMI IN port of the Transmitter (TX) unit using an HDMI cable.
- (Optional) Connect a local monitor to the HDMI OUT (Loop Out) port of the TX unit using an HDMI cable. This allows you to view the source content locally.
- Connect the RJ45 port of the TX unit to the RJ45 port of the Receiver (RX) unit using a single Cat5e/6/7 Ethernet cable. Ensure the cable is of high quality for optimal performance.
- Connect the HDMI OUT port of the RX unit to your remote display (e.g., TV, Projector) using an HDMI cable.
- Connect the provided DC 5V power adapters to both the TX and RX units.
Image 3.1: 1-to-1 connection diagram with local loop out.
3.2. 1-to-Many Connection
This configuration allows a single HDMI source to transmit to multiple remote displays via a Gigabit Ethernet switch.
- Connect your HDMI source (e.g., HD media player, PC) to the HDMI IN port of the Transmitter (TX) unit using an HDMI cable.
- Connect the RJ45 port of the TX unit to an available port on a Gigabit Ethernet switch.
- Connect multiple Receiver (RX) units to other available ports on the same Gigabit Ethernet switch using Cat5e/6/7 Ethernet cables. The system supports up to 253 RX units.
- Connect the HDMI OUT port of each RX unit to its respective remote display.
- Connect the provided DC 5V power adapters to all TX and RX units.
Note: This product requires a dedicated Gigabit Ethernet switch for 1-to-many configurations and is not compatible with standard home routers for this purpose. The Gigabit switch must be purchased separately.
Image 3.2: 1-to-many connection diagram using a Gigabit switch.
4. Operating Instructions
The GREATHTEK HDMI Extender is designed for plug-and-play operation. Once all connections are made and power is supplied, the system should automatically detect and transmit the HDMI signal.
- Power (PWR) LED: Indicates that the unit is receiving power.
- Status (STA) LED: Indicates active HDMI signal transmission.
The extender supports video resolutions up to 1920x1080 at 60Hz (1080p@60Hz). It is also backward compatible with lower resolutions such as 1080p@30Hz, 1080i, 720p@60Hz, and 720p@30Hz.
Image 4.1: Demonstrating lossless and no-delay transmission.
The advanced transmission technology ensures a smooth, high-definition experience without noticeable delay or loss of picture quality.
5. Maintenance
To ensure the longevity and optimal performance of your HDMI Extender, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the units. Avoid using liquid or aerosol cleaners.
- Environment: Keep the units in a cool, dry place away from direct sunlight, heat sources, and excessive moisture.
- Cable Management: Ensure all cables are properly routed and secured to prevent damage or accidental disconnection. Avoid bending cables sharply.
- Power: Disconnect power adapters from the units and power outlets when not in use for extended periods.
6. Troubleshooting
If you encounter issues with your HDMI Extender, please refer to the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No picture or signal on display. | Loose connections, no power, incompatible resolution, faulty cables. | 1. Ensure all HDMI and Ethernet cables are securely connected. 2. Verify both TX and RX units are powered on (PWR LED should be lit). 3. Check if the source device is outputting a compatible resolution (1080p@60Hz or lower). 4. Test with different HDMI or Ethernet cables if available. |
| Picture distortion, flickering, or intermittent signal. | Poor quality Ethernet cable, excessive cable length, electromagnetic interference, complex video scenes. | 1. Use high-quality Cat5e/6/7 Ethernet cables. 2. Ensure the Ethernet cable length does not exceed 150 meters (492 feet). 3. Reroute Ethernet cables away from power lines or other sources of interference. 4. If displaying complex scenes (e.g., pixel art, fast-moving graphics), try lowering the source resolution or refresh rate to 1080p@30Hz or 720p@60Hz. |
| No audio or poor audio quality. | HDMI cable issue, source audio settings. | 1. Ensure HDMI cables are fully inserted and functional. 2. Check the audio output settings on your source device. |
| 1-to-many connection not working. | Incorrect network switch, faulty switch, too many receivers. | 1. Confirm you are using a Gigabit Ethernet switch, not a standard home router. 2. Ensure the Gigabit switch is powered on and functioning correctly. 3. Verify all RX units are powered and connected to the switch. 4. The system supports up to 253 RX units; ensure you are within this limit. |
7. Specifications
| Model Name | GHT-DT243 |
| Video Resolution | Up to 1080p@60Hz (1920x1080) |
| Backward Compatibility | 1080p@30Hz, 1080i, 720p@60Hz, 720p@30Hz |
| Transmission Distance | Up to 150 meters (492 feet) over Cat5e/6/7 Ethernet cable |
| Ethernet Cable Category | Cat5e, Cat6, Cat7 (recommended) |
| Data Transfer Rate | 1000 Mbps (Gigabit) |
| HDMI Standard | HDMI 1.2 |
| HDCP Compliance | HDCP 1.2 |
| Connectivity Technology | Ethernet |
| Compatible Devices | Desktop, Laptop, Smart TV, Tablet |
| Special Features | Local Loop Out, One-to-Many Support (with Gigabit switch), No Delay, No Compression |
| Included Components | HDMI Extender (TX+RX), 2x Power Adapters, User Manual, After-sale Card |
| Power Supply | DC 5V (via included power adapters) |
| Dimensions (per unit) | Approximately 18.1 x 12.1 x 4.2 cm |
| Weight (total) | Approximately 400 g |
8. Warranty Information
This product comes with a limited warranty. For detailed information regarding warranty coverage, terms, and conditions, please refer to the included After-sale Card or contact GREATHTEK customer support.
9. Customer Support
For technical assistance, troubleshooting, or any inquiries regarding your GREATHTEK HDMI Extender, please visit the official GREATHTEK website or refer to the contact information provided on your After-sale Card.