LM-HB-70T/LM-HB-70R 18Gbps HDMI Extender
Product Overview
The LM-HB-70T/LM-HB-70R is a high-performance HDMI extender kit consisting of a transmitter (LM-HB-70T) and a receiver (LM-HB-70R). It is designed to extend high-definition video, audio, RS-232, and bi-directional IR signals up to 492ft (150m) via a single CAT5e/6 cable, making it an ideal solution for long-distance signal transmission in various professional and home scenarios.
Supporting 18Gbps video bandwidth and up to 4K2K@60Hz 4:4:4 resolution with HDCP 2.2 compliance, the extender delivers lossless high-definition content while featuring practical functions such as HDMI loop output, de-embedded audio output, and PoC (Power over Cable) technology. It is widely compatible with HDR, HDR10+, Dolby Vision, and HLG formats, meeting the demands of modern high-end audio-visual systems.
Caution: The product requires the use of UTP connectors. Please connect in direct interconnection method and do not cross connect.
Direct Interconnection Wiring: White-Orange → Orange; White-Green → Blue; White-Blue → Green; White-Brown → Brown
Direct Interconnection Wiring: White-Orange → Orange; White-Green → Blue; White-Blue → Green; White-Brown → Brown
Core Features
- Compliant with HDMI 2.0b, HDCP 2.2/1.4, and DVI 1.0 standards for broad compatibility
- 18Gbps video bandwidth supports 4K2K@60Hz 4:4:4 resolution and all HDMI 3D TV formats
- Long-distance transmission: 394ft (120m) for 4K2K signals; 492ft (150m) for 1080P signals via single CAT5e/6 cable
- Transmitter equipped with 1 HDMI loop output port for local display
- Receiver provides de-embedded analog stereo audio output (3.5mm jack) for independent audio setup
- Bi-directional IR pass-through, RS-232, and CEC pass-through for seamless device control
- Supports HDR, HDR10+, Dolby Vision, and HLG high dynamic range technologies
- PoC (Power over Cable) function: Power either transmitter or receiver, the other unit gets power via CAT cable
- Compact metal enclosure design for easy installation and reliable heat dissipation
- ESD protection (IEC 61000-4-2: ±8kV air-gap discharge, ±4kV contact discharge) for enhanced durability
Technical Specifications
Video & Audio Performance
| Parameter | Specification |
|---|---|
| HDMI Compliance | HDMI 2.0b |
| HDCP Compliance | HDCP 2.2 / HDCP 1.4 |
| Video Bandwidth | 18Gbps |
| Supported Resolutions | 4K2K 50/60Hz (4:4:4/4:2:2/4:2:0), 4K2K 30Hz 4:4:4, 1080p/i, 720p/i, 480p/i, All PC resolutions (including 1920×1200), All HDMI 3D TV formats |
| Color Space | RGB / YCbCr 4:4:4, YCbCr 4:2:2, YCbCr 4:2:0 |
| Color Depth | 8/10/12-bit (1080P60Hz, 4K30Hz, 4K60Hz YCbCr 4:2:2/4:2:0); 8-bit (4K60Hz 4:4:4) |
| HDMI Audio Formats | LPCM 2.0/2.1/5.1/6.1/7.1, Dolby Digital, Dolby TrueHD, Dolby Digital Plus (DD+), DTS-ES, DTS HD Master, DTS HD-HRA, DTS-X |
| L/R Audio Format | PCM 2.0 |
Connection Interfaces
| Device | Interface Type | Details |
|---|---|---|
| Transmitter (LM-HB-70T) | HDMI Input | 1× HDMI Type A (19-pin female) |
| HDMI Output (Loop) | 1× HDMI Type A (19-pin female) | |
| HDBT Port | 1× HDBT OUT (RJ45, 8-pin female) | |
| IR Ports | 1× IR IN (3.5mm Stereo Mini-jack), 1× IR OUT (3.5mm Stereo Mini-jack) | |
| RS-232 Port | 1× 3-pin Phoenix jack | |
| Service Port | 1× Mini-USB (firmware update) | |
| Power Port | 1× DC 24V/1A (locking connector) | |
| Receiver (LM-HB-70R) | HDBT Port | 1× HDBT IN (RJ45, 8-pin female) |
| HDMI Output | 1× HDMI Type A (19-pin female) | |
| Audio Output | 1× AUDIO OUT (3.5mm Stereo Mini-jack) | |
| IR Ports | 1× IR IN (3.5mm Stereo Mini-jack), 1× IR OUT (3.5mm Stereo Mini-jack) | |
| RS-232 Port | 1× 3-pin Phoenix jack | |
| Service Port | 1× Mini-USB (firmware update) | |
| Power Port | 1× DC 24V/1A (locking connector) |
Mechanical & Environmental Parameters
| Parameter | Specification |
|---|---|
| Housing | Metal Enclosure |
| Color | Black |
| Dimensions (W×D×H) | Transmitter/Receiver: 140mm × 65mm × 18mm |
| Weight | Transmitter: 160g; Receiver: 155g |
| Power Supply | Input: AC 100-240V 50/60Hz; Output: DC 24V/1A (locking connector) |
| Power Consumption | 9.36W |
| Operating Temperature | 0°C ~ 40°C / 32°F ~ 104°F |
| Storage Temperature | -20°C ~ 60°C / -4°F ~ 140°F |
| Operating Humidity | 20% ~ 80% RH (non-condensing) |
| Storage Humidity | 10% ~ 90% RH (non-condensing) |
| Transmission Distance (CAT5e/6) | 4K2K: 394ft/120m; 1080P: 492ft/150m |
Panel Functions
Transmitter (LM-HB-70T) Panel
| No. | Name | Function Description |
|---|---|---|
| 1 | Power LED | Red LED illuminates when the transmitter is powered on |
| 2 | SERVICE Port | Firmware update port (Mini-USB) |
| 3 | DC 24V Port | DC 24V/1A power supply input; Supports PoC (power one unit to supply both) |
| 4 | HDBT OUT Port | RJ45 connector for connecting to receiver’s HDBT IN via CAT5e/6 cable |
| 5 | Connection Signal Indicator | On: Good connection with receiver; Blinking: Poor connection; Off: No connection |
| 6 | Data Signal Indicator | On: HDMI signal with HDCP; Blinking: HDMI signal without HDCP; Off: No HDMI signal |
| 7 | OUT Port | HDMI loop output for local display device connection |
| 8 | IN Port | HDMI signal input port (connect to source device) |
| 9 | IR IN Port | 3.5mm jack for receiving IR remote control signals |
| 10 | IR OUT Port | 3.5mm jack for controlling source device (receives signal from receiver’s IR IN) |
| 11 | RS-232 Port | 3-pin Phoenix connector for bi-directional RS-232 command transmission |
Receiver (LM-HB-70R) Panel
| No. | Name | Function Description |
|---|---|---|
| 1 | Power LED | Red LED illuminates when the receiver is powered on |
| 2 | SERVICE Port | Firmware update port (Mini-USB) |
| 3 | DC 24V Port | DC 24V/1A power supply input; Supports PoC (power one unit to supply both) |
| 4 | HDBT IN Port | RJ45 connector for connecting to transmitter’s HDBT OUT via CAT5e/6 cable |
| 5 | Connection Signal Indicator | On: Good connection with transmitter; Blinking: Poor connection; Off: No connection |
| 6 | Data Signal Indicator | On: HDMI signal with HDCP; Blinking: HDMI signal without HDCP; Off: No HDMI signal |
| 7 | OUT Port | HDMI signal output port (connect to display device) |
| 8 | AUDIO OUT | 3.5mm stereo jack for analog audio output |
| 9 | IR IN | 3.5mm jack for receiving IR remote control signals |
| 10 | IR OUT | 3.5mm jack for controlling display device (receives signal from transmitter’s IR IN) |
| 11 | RS-232 | 3-pin Phoenix connector for bi-directional RS-232 command transmission |
IR System Notes
IR Receiver and Blaster use standard pin definition for seamless compatibility. Key usage notes:
- Transmission distance: 0-5 meters when the angle between IR receiver and remote control is ±45°
- Transmission distance: 0-8 meters when the angle between IR receiver and remote control is ±90°
- Bi-directional IR pass-through allows controlling both source and display devices from either end
Application Scenarios
The LM-HB-70T/LM-HB-70R HDMI extender is widely used in scenarios requiring long-distance high-definition signal transmission. Typical applications include:
- Home Theater: Extend 4K UHD signal from media players to projectors or TVs in large living rooms
- Commercial Display: Digital signage, advertising screens in shopping malls, airports, and hotels
- Conference Rooms: Connect presentation laptops to large displays or projectors without cable length limitations
- Education Institutions: Classrooms, lecture halls, and auditoriums for teaching content transmission
- Command Centers: Security monitoring systems, control rooms for long-distance video signal distribution
- Retail Stores: Product display screens, interactive kiosks with centralized signal management
Product Protection
This product contains sensitive electrical components that may be damaged by electrical spikes, surges, electric shock, lightning strikes, etc. Use of surge protection systems is highly recommended to protect the equipment and extend its service life. Additionally, use “Premium High Speed HDMI” cables for HDMI IN/OUT connections to ensure optimal signal quality.
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