1. Introduction
The Amphenol Digital ABS313H Series Splitter is designed for distributing high-frequency signals within a coaxial home network. This 3-way splitter supports MoCA 2.5 technology, enabling efficient signal distribution for both networking and video applications across a frequency range of 5 to 1675 MHz.
This manual provides essential information for the proper installation, operation, and maintenance of your Amphenol ABS313H splitter.
2. Key Features
- MoCA 2.5 Compatibility: Supports the latest Multimedia over Coax Alliance (MoCA) 2.5 technology for enhanced network performance and faster data rates.
- Wide Frequency Range: Operates effectively from 5 to 1675 MHz, suitable for various networking and video distribution needs.
- Low Insertion Loss: Engineered for minimal signal degradation, ensuring optimal signal transmission.
- High Isolation: Provides excellent isolation between connected devices, reducing interference.
- Surge Protection: Features 6kV ring wave surge withstand for enhanced durability and protection.
- Pressure-Sealed Ports: Equipped with 15 PSI pressure-sealed coaxial F-Ports for reliable connections.
- Durable Construction: Built with a rugged metal housing for both indoor and outdoor installations.
3. Package Contents
- Amphenol 3-Way Digital Coaxial Splitter (Model: ABS313H)
- Mounting Screws (typically included for installation)

4. Setup and Installation
Follow these steps for proper installation of your coaxial splitter:
- Identify Ports: Locate the "IN" port (input) and the "OUT" ports (outputs) on the splitter. The ABS313H has one input and three output ports.
- Connect Input Cable: Connect the incoming coaxial cable (from your service provider or antenna) to the "IN" port of the splitter. Ensure the connection is finger-tight, then use a 7/16 inch wrench to gently tighten it further, avoiding overtightening.
- Connect Output Cables: Connect coaxial cables from the "OUT" ports of the splitter to your devices (e.g., modem, TV, set-top box). Secure each connection as described in step 2.
- Mounting (Optional): If desired, use the provided mounting screws to secure the splitter to a wall or other stable surface. Ensure the mounting location is dry and protected from extreme elements if installed outdoors.

Important: Ensure all coaxial cable connections are secure to prevent signal loss and interference. Use high-quality coaxial cables for optimal performance.
5. Operating Principles
The Amphenol ABS313H splitter divides an incoming coaxial signal into three separate output signals. This allows multiple devices to share a single coaxial input. Due to the nature of signal splitting, there will be a slight reduction in signal strength at each output port, known as insertion loss. For the ABS313H, the typical insertion loss values are:
- Output 1: -3.7 dB
- Output 2: -7.3 dB
- Output 3: -7.3 dB
These values are within acceptable limits for most home network and video distribution applications, especially with MoCA 2.5 technology which is designed to be robust against signal attenuation.
6. Maintenance
The Amphenol ABS313H splitter is designed for long-term, maintenance-free operation. To ensure continued performance:
- Keep Connections Secure: Periodically check all coaxial connections to ensure they remain tight. Loose connections can lead to signal degradation.
- Cleanliness: Keep the splitter free from dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Environmental Protection: While rugged, avoid exposing the splitter to excessive moisture or extreme temperatures beyond its operational limits.
7. Troubleshooting
If you experience issues with your coaxial network, consider the following troubleshooting steps:
- No Signal or Weak Signal:
- Verify all coaxial cables are securely connected to the splitter and to your devices.
- Inspect cables for damage (kinks, cuts, frayed connectors). Replace damaged cables.
- Bypass the splitter temporarily by connecting a device directly to the incoming coaxial line to determine if the issue is with the splitter or the signal source.
- Intermittent Connection:
- Ensure all connections are tight.
- Check for external interference sources near the cables or splitter.
- MoCA Network Issues:
- Confirm that all MoCA-enabled devices are properly configured.
- Ensure your MoCA network is properly terminated with MoCA filters if necessary, especially at the point of entry to prevent signal leakage.
If problems persist after performing these steps, contact Amphenol customer support or your service provider for further assistance.
8. Specifications
| Feature | Specification |
|---|---|
| Model | ABS313H |
| Type | 3-Way Digital Coaxial Splitter |
| Frequency Range | 5 - 1675 MHz |
| MoCA Compatibility | MoCA 2.5 |
| Insertion Loss (Output 1) | -3.7 dB |
| Insertion Loss (Output 2 & 3) | -7.3 dB |
| Surge Protection | 6kV Ring Wave |
| Port Sealing | 15 PSI Pressure-Sealed F-Ports |
| Connector Type | Coaxial F-Type |
| Dimensions (Package) | 3.31 x 2.56 x 0.79 inches |
| Item Weight | 2.08 ounces |
| Manufacturer | Amphenol |
9. Warranty Information
Specific warranty details for the Amphenol ABS313H Digital Coaxial Splitter are typically provided with the product packaging or available on the official Amphenol website. Please refer to these resources for comprehensive warranty terms and conditions.
10. Customer Support
For technical assistance, product inquiries, or further support, please visit the official Amphenol website or contact their customer service department. Contact information can usually be found on the manufacturer's website or product packaging.
Amphenol Official Website: www.amphenol.com