1. Introducció
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. Producte acabatview i Components
Familiarize yourself with the components of your Alcad AI-400 ampmés viu.

Figura 1: Davant view of the Alcad AI-400 Indoor Amplifier. This image displays the compact white casing de la 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.
Components clau:
- 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.
- Entrada d'alimentació: Socket for connecting the main power cable (230V~, 50/60Hz).
- Indicador d'alimentació: (If present, typically an LED) Indicates when the unit is powered on.
3. Informació de seguretat
Please read and understand all safety instructions before installing or operating the ampmés viu.
- Assegureu-vos que la font d'alimentació voltage matches the specifications (230V~, 50/60Hz).
- No exposar el amplifier to water, moisture, or extreme temperatures.
- Eviteu col·locar la unitat a prop de fonts de calor o sota la llum solar directa.
- No obriu la c.asing de la amplifier. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
- Desconnecteu l'alimentació abans de fer qualsevol connexió o desconnexió.
- Mantingueu la unitat lluny dels nens.
- Assegureu-vos que hi hagi una ventilació adequada al voltant de la unitat per evitar el sobreescalfament.
4. Configuració i instal·lació
Follow these steps for proper installation of your Alcad AI-400 ampmés viu.
- Desembalar: Traieu amb cura amplifier from its packaging. Retain packaging for future transport or storage.
- Col·locació: 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.
- Entrada de connexió: 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.
- 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.
- Connexió d'alimentació: 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.
Nota: Ensure all coaxial connections are tight to prevent signal loss.
5. Instruccions de funcionament
After installation, you may need to adjust the gain settings for optimal signal quality.
- Encès: Assegureu-vos el ampel lifier està endollat i encès.
- Escaneig inicial: Perform a channel scan on your connected televisions to detect available channels.
- Ajust de guany:
- Localitza el VHF/FM/DAB Gain Control i UHF Gain Control knobs on the ampmés viu.
- 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.
Consell: sobre-amplification can be as detrimental as under-amplification. Adjust gain only as much as necessary to achieve a clear signal.
6. Manteniment
The Alcad AI-400 amplifier requires minimal maintenance.
- Neteja: 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.
- Ventilació: Assegureu-vos que les ranures de ventilació de la amplifier are not blocked by dust or other objects to prevent overheating.
- Connexions de cable: Periodically check all coaxial cable connections to ensure they remain tight and secure.
7. Solució De Problemes
Si teniu problemes amb el vostre amplificador, consulteu els següents problemes i solucions habituals.
| Problema | Causa possible | Solució |
|---|---|---|
| No power / Power indicator off | Unit unplugged; Power outlet faulty; Internal fuse (not user-serviceable) | Check power cord connection. Try a different outlet. If still no power, contact support. |
| Sense senyal a la televisió | Incorrect cable connections; Antenna issue; Amplifier gain too low; TV not on correct input | Verify all cable connections are secure. Check antenna. Increase amplifier gain. Ensure TV is on the correct input (e.g., Antenna/TV). Perform TV channel scan. |
| Poor signal quality (pixelation, freezing) | Insufficient gain; Over-amplification; Loose connections; External interference | Adjust gain controls (increase if weak, decrease if distorted). Tighten all coaxial connections. Check for strong interference sources nearby. |
| Only some channels affected | Specific band gain issue; Antenna direction | Adjust the gain control for the affected band (VHF/FM/DAB or UHF). Consider adjusting antenna direction. |
If the problem persists after trying these solutions, please contact Alcad customer support.
8. Especificacions
| Model | AI-400 |
| Tipus | Broadband Apartment Amplifier for Terrestrial TV |
| Entrades | VHF/FM/DAB, UHF |
| Sortides | 4 (Equal or Unbalanced) |
| Obteniu el control | Independent for VHF/FM/DAB and UHF bands |
| Font d'alimentació | Built-in, 230V~, 50/60Hz |
| Fabricant | ALCAD |
| Dimensions del paquet | 20 x 13.6 x 6.4 cm |
| Pes | 780 g |
| ASIN | B091CRZWHN |
9. Garantia i Suport
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the manufacturer directly.
- Fabricant: ALCAD
- Contacte: Please visit the official ALCAD website or contact your retailer for support options.