1. Introduction
The Kramer TP-789R is a high-performance HDBaseT receiver designed for extending 4K60Hz (4:2:0) HDMI, RS-232, and IR signals over twisted pair cabling. This device supports bidirectional Power over Ethernet (PoE), allowing it to either supply power to a PoE acceptor device or receive power from a remote PoE provider. It extends video signals up to 40 meters (130 feet) for 4K@60Hz (4:2:0) resolution and up to 70 meters (230 feet) for 1080p HD video resolutions over Kramer copper cables. This manual provides essential information for the proper installation, operation, and maintenance of your TP-789R receiver.
2. Key Features
- HDBaseT 1.0 receiver for reliable signal extension.
- Supports bidirectional PoE (Power over Ethernet/HDBaseT) for flexible power solutions.
- Extends 1080p signals up to 70 meters (230 feet).
- Extends 4K@60Hz (4:2:0) signals up to 40 meters (130 feet).
- Includes control extension capabilities for RS-232 and IR signals.
3. Package Contents
Verify that all items are present in your package:
- Kramer TP-789R Receiver Unit
- Power Adapter (if not using PoE)
- Mounting Bracket Kit
- Quick Start Guide
4. Physical Description
Familiarize yourself with the ports and indicators on the TP-789R receiver.

Figure 1: Front and Rear Panels of the Kramer TP-789R Receiver. The image displays the compact black casing of the TP-789R, with the Kramer DigiTOOLS logo on the top. The front panel shows DIP switches for setup, and LED indicators for IN, OUT, LINK, POE, and ON/FEEDER status. The rear panel features an HDBT IN port (RJ-45), HDMI OUT port, IR port, RS-232 terminal block, and a 48V DC power input.
4.1 Front Panel
- SETUP DIP Switches: Used for configuring device settings. Refer to the detailed setup guide for specific configurations.
- IN LED: Indicates incoming HDBaseT signal.
- OUT LED: Indicates outgoing HDMI signal.
- LINK LED: Indicates HDBaseT link status.
- POE LED: Indicates Power over Ethernet status.
- ON/FEEDER LED: Indicates power status and PoE feeding activity.
4.2 Rear Panel
- HDBT IN: RJ-45 connector for HDBaseT input from a compatible transmitter.
- HDMI OUT: HDMI connector for connecting to a display device.
- IR: 3.5mm jack for IR receiver/emitter connection.
- RS-232: Terminal block for serial control communication.
- 48V DC: Power input for external power adapter (if not using PoE).
5. Setup and Installation
Follow these steps to properly set up your Kramer TP-789R receiver.
5.1 Connection Diagram

Figure 2: Typical Connection Diagram for Kramer TP-789R. This diagram illustrates the connection of a Blu-ray Player (HDMI source) to a Kramer WP-20 wall plate (HDBaseT transmitter) via HDMI and RS-232. The WP-20 then connects to the TP-789R receiver via HDBaseT (Cat cable), which also carries PoE. The TP-789R outputs HDMI to a display and RS-232 to a control device (SL-240C). An optional external power supply can be connected to the TP-789R.
5.2 Installation Steps
- Power Off Devices: Ensure all devices, including the TP-789R, source, and display, are powered off before making any connections.
- Connect HDBaseT Cable: Connect a Cat cable (e.g., Cat 6a) from the HDBaseT output of a compatible transmitter (e.g., Kramer WP-20) to the HDBT IN port on the TP-789R. Ensure the cable length is within the specified limits (up to 40m for 4K, 70m for 1080p).
- Connect HDMI Output: Connect an HDMI cable from the HDMI OUT port on the TP-789R to the HDMI input of your display device (e.g., TV, projector).
- Connect Control (Optional):
- For RS-232 control, connect your control system to the RS-232 terminal block.
- For IR control, connect an IR emitter/receiver to the IR port.
- Power Connection:
- If using PoE, ensure your HDBaseT transmitter or network switch is providing power and the POE LED is on.
- If using an external power adapter, ensure it is correctly connected and the power outlet is functional.
- Power On: Power on all connected devices. The LEDs on the TP-789R should illuminate to indicate proper connection and operation.
5.3 DIP Switch Configuration
The SETUP DIP switches on the front panel are used for advanced configuration. Refer to the Kramer TP-789R product page or full user manual on the Kramer website for detailed information on DIP switch settings for EDID management, HDBaseT modes, and other functionalities.
6. Operating Instructions
Once properly installed, the TP-789R operates largely automatically. Ensure your source device is outputting a compatible HDMI signal and your display is set to the correct input.
- Signal Transmission: The TP-789R will automatically detect the incoming HDBaseT signal and convert it to HDMI for your display.
- LED Indicators: Monitor the front panel LEDs (IN, OUT, LINK, POE) to confirm active connections and power status. A solid LINK LED indicates a stable HDBaseT connection.
- Control Pass-through: RS-232 and IR signals are passed bidirectionally (if supported by the transmitter) allowing control of source or display devices from either end of the extension.
7. Maintenance
The Kramer TP-789R is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure longevity:
- Cleaning: Use a soft, dry cloth to clean the unit. Do not use liquid or aerosol cleaners.
- Ventilation: Ensure adequate airflow around the unit. Do not block ventilation openings.
- Environment: Operate the device within its specified temperature and humidity ranges. Avoid extreme temperatures, direct sunlight, and moisture.
- Firmware Updates: Periodically check the Kramer website for any available firmware updates for improved performance or new features.
8. Troubleshooting
If you encounter issues with your TP-789R, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| No video output on display. |
|
| Intermittent video or flickering. |
|
| No power to the unit. |
|
| Control signals (RS-232/IR) not working. |
|
9. Specifications
Technical specifications for the Kramer TP-789R receiver:
| Feature | Detail |
|---|---|
| Model | TP-789R |
| Brand | Kramer |
| Connectivity Technology | Ethernet, HDMI |
| Connector Type | HDMI, RJ45 |
| Video Resolution | Up to 4K@60Hz (4:2:0) |
| Max Extension (4K@60Hz) | 40m (130ft) over Kramer copper cables |
| Max Extension (1080p) | 70m (230ft) over Kramer copper cables |
| PoE Support | Bidirectional (Power over HDBaseT) |
| Control Extension | RS-232, IR |
| Audio Output Mode | Stereo |
| Surround Sound Channel Configuration | 2.2 |
| Item Weight | 200 Grams (7.1 ounces) |
| Color | Black |
| Manufacturer | Kramer |
| Date First Available | November 7, 2019 |
10. Warranty and Support
Kramer products are designed for reliability and performance. For specific warranty information, please refer to the warranty card included with your product or visit the official Kramer website. For technical support, product registration, or to download the latest drivers and firmware, please visit the Kramer Support Page or contact your local Kramer representative.
Contact Information:
- Website: www.kramerav.com
- Support: kramerav.com/us/support





