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The Kramer VM-3HN is a high-quality 1:3 HDMI distribution amplifier designed to take a single HDMI input, equalize and reclock the signal, and then distribute it to three identical HDMI outputs. This device is capable of handling signals with resolutions up to 4Kx2K, including WUXGA and 1080p, making it suitable for a wide range of modern display technologies. Its primary function is to ensure that a single HDMI source can be reliably displayed on multiple screens without any loss of signal integrity or quality.
One of the key features of the VM-3HN is its support for a maximum data rate of 10.2Gbps, which translates to 3.4Gbps per graphic channel. This high bandwidth capability ensures that it can transmit high-resolution video and audio content without compression or degradation. The device fully supports various HDMI features, including Deep Color, x.v.Color™, Lip Sync, HDMI Uncompressed Audio Channels, Dolby TrueHD, DTS-HD, and CEC (Consumer Electronics Control). This comprehensive support means that it can seamlessly integrate into advanced home theater systems and professional AV setups, preserving the full range of audio and video capabilities from the source.
The VM-3HN is also HDCP (High-bandwidth Digital Content Protection) compliant, which is crucial for distributing protected content from sources like Blu-ray players, streaming devices, and gaming consoles. HDCP compliance ensures that the device can handle encrypted signals, preventing issues like black screens or error messages that can occur with non-compliant equipment.
A significant technological advantage of the VM-3HN is its incorporation of Kramer Equalization & re-Klocking™ Technology. This proprietary technology is designed to rebuild the digital signal integrity, allowing for longer cable runs without signal degradation. Digital signals can suffer from attenuation and jitter over distance, leading to visual artifacts or complete signal loss. The equalization and re-clocking process actively restores the signal to its original strength and timing, ensuring a clean and stable output even when using extended cable lengths.
Another intelligent feature is I-EDIDPro™ Kramer Intelligent EDID Processing™. EDID (Extended Display Identification Data) is crucial for HDMI systems as it allows the source device to understand the capabilities of the connected display. The VM-3HN's intelligent EDID handling and processing algorithm ensures "Plug and Play" operation for HDMI systems. This means that the device can effectively manage the EDID communication between the source and the multiple displays, preventing compatibility issues and ensuring that the optimal resolution and audio format are selected. The device also includes a default EDID, which is particularly useful for fast and efficient connection, allowing the VM-3HN to operate even without a display connected to its outputs. This can be beneficial during setup or in scenarios where a display might be temporarily disconnected.
The VM-3HN also supports 3D pass-through, making it compatible with 3D content and displays. This ensures that the device does not interfere with the transmission of 3D signals, allowing users to enjoy immersive 3D experiences.
In terms of physical design, the VM-3HN comes in a compact DigiTOOLS® enclosure. This small form factor makes it easy to integrate into various installations, whether placed on a table, mounted in a rack using an optional adapter, or discreetly hidden behind a display. The device is powered by a 5V DC source, which is typically provided by an external power adapter.
For operation, the VM-3HN features an EDID SETUP button. A single press of this button displays the current EDID status, providing immediate feedback on the device's configuration. A second press enters a "read mode," allowing the user to cycle through different EDID source options. These options typically include acquiring EDID from output 1, output 2, output 3, an auto-mix mode (where all LEDs flash slowly), or a default EDID (where all LEDs flash quickly). Once the desired EDID source is selected, releasing the button initiates the EDID reading process. The VM-3HN then reads the EDID for a few seconds, and upon completion, the LEDs return to display the current output connection status. If an unconnected output is chosen or the EDID cannot be read, the device automatically loads its default EDID, ensuring continuous operation.
The device also offers a "Force RGB Mode" feature. By pressing the EDID button for three seconds, the VM-3HN can toggle between "Normal" and "Force RGB" modes. In "Normal mode" (not forcing RGB), the input and output LEDs flash once, while in "Force RGB mode," they flash four times. This allows users to ensure that the video signal is transmitted in RGB format, which can be important for certain displays or applications. After setting the Force RGB mode, it is necessary to re-read the EDID from the display to update the Force RGB change. The device identifies its mode upon powering on: one flash for "Normal" mode and four flashes for "Force RGB" mode. The default mode is "Normal."
Installation of the VM-3HN is straightforward. Users are advised to attach the included rubber feet for tabletop placement or use an optional RK-3T rack adapter for rack mounting. Connecting the device involves first switching off the power to all connected equipment. An HDMI input source, such as a Blu-ray player, is connected to the HDMI IN connector. Up to three HDMI acceptor devices, such as displays, are then connected to the HDMI OUT 1, HDMI OUT 2, and HDMI OUT 3 connectors. It's important to note that not all outputs need to be connected for the device to function. Finally, the 5V DC power adapter is connected to the VM-3HN and then plugged into the mains electricity, at which point the ON LED will illuminate. Kramer recommends using high-performance cables to ensure optimal signal quality and to avoid interference.
For maintenance and optimal performance, several guidelines are provided. Users should always use good quality connection cables, preferably Kramer high-performance, high-resolution cables, to prevent interference, signal deterioration, and elevated noise levels. Cables should not be secured in tight bundles or rolled into tight coils, as this can affect signal integrity. The device should be positioned away from neighboring electrical appliances that might cause interference. Additionally, the VM-3HN should be kept away from moisture, excessive sunlight, and dust to ensure its longevity and reliable operation. It is explicitly stated that the equipment is intended for indoor use only and should only be connected to other equipment installed within a building.
Safety instructions emphasize that there are no operator-serviceable parts inside the unit, and only the Kramer Electronics power supply provided with the unit should be used. Before installation, it is crucial to disconnect the power and unplug the unit from the wall.
Kramer Electronics also promotes environmental responsibility through its recycling program. The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims to reduce landfill waste by requiring collection and recycling. Kramer Electronics has partnered with the European Advanced Recycling Network (EARN) to cover the costs of treatment, recycling, and recovery of waste Kramer Electronics branded equipment. Users can find details about recycling arrangements for their specific country on the KramerAV website.
Overall, the Kramer VM-3HN is a robust and intelligent HDMI distribution amplifier designed for reliability, high performance, and ease of use in various AV environments, from boardrooms to home theaters. Its advanced signal processing and EDID management features ensure a seamless and high-quality viewing experience across multiple displays.
General| Number of Outputs | 3 |
|---|---|
| Input | 1 x HDMI |
| Output | 3 x HDMI |
| Max. Data Rate | 10.2 Gbps |
| HDCP Support | Yes |
| Power Consumption/Supply | 5V DC, 2A |
| Resolution Support | Up to 4K@30Hz |
| Weight | 0.3 kg (0.7 lbs) approx. |
| HDMI Support | HDMI 1.4 |
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