Alcad 4 Output Indoor Amplifier (AI-400)

1. Introduction

The Alcad AI-400 is a broadband apartment amplifier designed for terrestrial TV signals. It features a built-in power supply unit and is engineered to amplify both VHF and UHF bands independently. This amplifier provides individual gain control for each band, allowing for precise signal optimization. With four outputs, it facilitates signal distribution to four or more televisions, making it suitable for multi-room installations. The compact design ensures easy placement in various indoor environments.

2. Product Overview and Components

Familiarize yourself with the components of your Alcad AI-400 amplifier.

Figure 1: Front view of the Alcad AI-400 Indoor Amplifier. This image displays the compact white casing of the amplifier, showing the input and output ports, as well as the gain control knobs. On the left side, ventilation slots and power specifications are visible. The model number "AI-400" is clearly printed on the top surface.

Key Components:

• VHF/FM/DAB Input: Connection point for Very High Frequency, FM radio, and Digital Audio Broadcasting signals.
• UHF Input: Connection point for Ultra High Frequency signals.
• VHF/FM/DAB Gain Control: Rotary knob to adjust the amplification level for VHF/FM/DAB signals.
• UHF Gain Control: Rotary knob to adjust the amplification level for UHF signals.
• Output Ports (OUT1, OUT2, OUT3, OUT4): Four coaxial output ports for connecting to televisions or other distribution points.
• Power Input: Socket for connecting the main power cable (230V~, 50/60Hz).
• Power Indicator: (If present, typically an LED) Indicates when the unit is powered on.

3. Safety Information

Please read and understand all safety instructions before installing or operating the amplifier.

• Ensure the power supply voltage matches the specifications (230V~, 50/60Hz).
• Do not expose the amplifier to water, moisture, or extreme temperatures.
• Avoid placing the unit near heat sources or in direct sunlight.
• Do not open the casing of the amplifier. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• Disconnect the power supply before making any connections or disconnections.
• Keep the unit away from children.
• Ensure adequate ventilation around the unit to prevent overheating.

4. Setup and Installation

Follow these steps for proper installation of your Alcad AI-400 amplifier.

1. Unpack: Carefully remove the amplifier from its packaging. Retain packaging for future transport or storage.
2. Placement: Choose a dry, well-ventilated indoor location away from direct sunlight, heat sources, and moisture. Ensure easy access to power outlets and antenna/TV cables.
3. Connect Input: Connect your terrestrial TV antenna cable to the appropriate input port(s) on the amplifier. Use the "VHF/FM/DAB" input for those signals and the "UHF" input for UHF signals. If your antenna combines both, use a suitable diplexer if necessary, or connect to the primary input.
4. Connect Outputs: Connect coaxial cables from the amplifier's "OUT1", "OUT2", "OUT3", and "OUT4" ports to the input ports of your televisions or other distribution devices.
5. Power Connection: Once all signal cables are securely connected, plug the amplifier's power cord into a standard 230V~, 50/60Hz electrical outlet. The power indicator (if present) should illuminate.

Note: Ensure all coaxial connections are tight to prevent signal loss.

5. Operating Instructions

After installation, you may need to adjust the gain settings for optimal signal quality.

1. Power On: Ensure the amplifier is plugged in and powered on.
2. Initial Scan: Perform a channel scan on your connected televisions to detect available channels.
3. Adjust Gain:
   • Locate the VHF/FM/DAB Gain Control and UHF Gain Control knobs on the amplifier.
   • Start with the gain controls set to a mid-range position.
   • Monitor the signal quality on your television. If the signal is weak or pixelated, gradually increase the gain for the relevant band (VHF/FM/DAB or UHF).
   • If the signal is over-amplified (causing distortion or "snow"), gradually decrease the gain. The goal is to achieve a clear, stable picture without distortion.
   • Adjust each band's gain independently until optimal signal quality is achieved for all channels.

Tip: Over-amplification can be as detrimental as under-amplification. Adjust gain only as much as necessary to achieve a clear signal.

6. Maintenance

The Alcad AI-400 amplifier requires minimal maintenance.

• Cleaning: Disconnect the power before cleaning. Use a soft, dry cloth to wipe the exterior of the unit. Do not use liquid cleaners or abrasive chemicals.
• Ventilation: Ensure that the ventilation slots on the amplifier are not blocked by dust or other objects to prevent overheating.
• Cable Connections: Periodically check all coaxial cable connections to ensure they remain tight and secure.

7. Troubleshooting

If you encounter issues with your amplifier, refer to the following common problems and solutions.

If the problem persists after trying these solutions, please contact Alcad customer support.

8. Specifications

9. Warranty and Support

For warranty information and technical support, please refer to the documentation provided with your purchase or contact the manufacturer directly.

• Manufacturer: ALCAD
• Contact: Please visit the official ALCAD website or contact your retailer for support options.