1. Introduction
This user manual provides comprehensive instructions for the installation, operation, and maintenance of the Triax MFA 657 LTE 700 Masthead Amplifier. This device is designed to amplify terrestrial television and radio signals, ensuring optimal reception quality. Please read this manual thoroughly before installation and use to ensure safe and correct operation.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the device:
- Ensure the power supply is disconnected before making any connections or adjustments.
- Do not expose the amplifier to moisture, rain, or extreme temperatures.
- Install the device in a well-ventilated area to prevent overheating.
- Only use the specified power supply (24 VDC) for this unit.
- Avoid placing the amplifier near heat sources or in direct sunlight.
- Do not attempt to open or repair the unit yourself. Refer all servicing to qualified personnel.
3. Product Overview
The Triax MFA 657 LTE 700 is a masthead amplifier designed to boost signals from various antenna types. It features multiple inputs with adjustable gain to optimize signal levels for different frequency bands.
Figure 3.1: Triax MFA 657 LTE 700 Masthead Amplifier
This image displays the Triax MFA 657 LTE 700 Masthead Amplifier. The top cover is open, revealing the internal amplifier unit. The unit features three input ports labeled 'UHF', 'BIII/DAB/RNT', and 'FM', along with a DC power input and an output port. A label on the unit provides key specifications including part number 340557, frequency ranges for UHF (470-694MHz), BIII/DAB/RNT (174-230MHz), and FM (87-108MHz), adjustable gain levels for each input, a maximum output level of 108 dBuV, and power requirements of 24V/42mA.
Key Features:
- Part No: 340557
- Model: MFA 657 LTE 700
- Inputs: UHF, BIII/DAB/RNT, FM
- Adjustable Gain:
- UHF: 20-35dB
- BIII/DAB/RNT: 10-22dB
- FM: 10-22dB
- Frequency Ranges:
- UHF: 470-694MHz
- BIII/DAB/RNT: 174-230MHz
- FM: 87-108MHz
- Max. Output Level: 108 dBuV
- Power Supply: 24 VDC, 42mA
4. Setup and Installation
Follow these steps for proper installation of your Triax MFA 657 LTE 700 Masthead Amplifier:
- Mounting: Securely mount the amplifier to a mast or suitable outdoor structure using appropriate mounting hardware (not included). Ensure it is positioned to minimize cable length from the antennas.
- Antenna Connections:
- Connect your UHF antenna cable to the input port labeled UHF.
- Connect your BIII/DAB/RNT antenna cable to the input port labeled BIII/DAB/RNT.
- Connect your FM antenna cable to the input port labeled FM.
- Ensure all F-connectors are tightened securely to prevent signal loss and moisture ingress.
- Output Connection: Connect the output cable from the amplifier to your indoor distribution system or directly to your television/receiver. This cable will also carry the 24 VDC power to the amplifier.
- Power Supply Connection: Connect the 24 VDC power supply (not included, typically a power inserter) to the indoor end of the output cable. Ensure the power supply is compatible with the amplifier's requirements (24V/42mA).
- Power On: Once all connections are secure, plug in the power supply. The amplifier will now be active.
5. Operation
The Triax MFA 657 LTE 700 operates automatically once powered. The primary operational aspect is adjusting the gain for each input to achieve optimal signal levels without overdriving your receiver.
Gain Adjustment:
The amplifier features adjustable gain controls for each input (UHF, BIII/DAB/RNT, FM). These controls are typically small potentiometers located on the amplifier unit, as shown in Figure 3.1. Use a small screwdriver to carefully adjust the gain for each band:
- UHF Gain: Adjustable from 20dB to 35dB. Adjust this to optimize digital terrestrial television (DTT) signals.
- BIII/DAB/RNT Gain: Adjustable from 10dB to 22dB. Use this for DAB radio and other BIII band signals.
- FM Gain: Adjustable from 10dB to 22dB. Adjust for optimal FM radio reception.
Recommendation: Start with the lowest gain setting and gradually increase it until you achieve a clear, stable picture and sound on your television or radio. Avoid setting the gain too high, as this can lead to signal distortion and pixelation (overdriving).
6. Maintenance
The Triax MFA 657 LTE 700 Masthead Amplifier is designed for minimal maintenance. However, periodic checks can ensure its longevity and optimal performance:
- Cable Connections: Periodically inspect all F-connectors for corrosion or looseness. Ensure they are clean and tightly secured.
- Weather Protection: While designed for outdoor use, ensure the housing is intact and free from cracks or damage that could allow water ingress.
- Cleaning: If necessary, gently wipe the exterior of the unit with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Environmental Factors: Ensure no debris (e.g., leaves, bird nests) is obstructing the unit or its ventilation.
7. Troubleshooting
If you experience issues with your amplifier, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No signal or weak signal |
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| Pixelation or distorted picture/sound |
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| No power indicator (if applicable) |
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8. Specifications
| Feature | Value |
|---|---|
| Model Number | 340557 |
| Brand | Triax |
| Input 1 (UHF) Frequency Range | 470-694 MHz |
| Input 1 (UHF) Adjustable Gain | 20-35 dB |
| Input 2 (BIII/DAB/RNT) Frequency Range | 174-230 MHz |
| Input 2 (BIII/DAB/RNT) Adjustable Gain | 10-22 dB |
| Input 3 (FM) Frequency Range | 87-108 MHz |
| Input 3 (FM) Adjustable Gain | 10-22 dB |
| Noise Factor (UHF) | 2 dB or 2.5 dB |
| Noise Factor (BIII/DAB/RNT) | 2.5 dB |
| Noise Factor (FM) | 2.5 dB |
| Maximum Output Level | 108 dBuV |
| Power Supply | 24 VDC, 42 mA |
| Number of Outputs | 1 |
9. Warranty and Support
Information regarding product warranty and customer support contact details was not available in the provided product data. Please refer to the product packaging or the official Triax website for the most up-to-date warranty terms and support information.
For technical assistance or further inquiries, it is recommended to visit the official Triax website or contact your local Triax distributor.
