ANSI/SCTE 153 2021

Drop Passives: Splitters, Couplers and Power Inserters

Executive Summary

The purpose of this document is to identify common characteristics of splitters, couplers and power inserters used on premises connected to broadband hybrid fiber-coax (HFC) networks.


The purpose of this document is to recommend mechanical, environmental and electrical standards for broadband radio frequency (RF) devices whose primary purpose is to divide signals presented to an input port among two or more output ports with a fixed division ratio that is nominally independent of frequency within the specified bandwidth limits of the device. Alternately, such devices can be used to combine signals from several input ports into a common output port. The most common use for such devices is on-premises RF signal distribution.

Products covered by this specification include signal splitters (2, 3, 4, and 8-way), directional couplers, combined splitter/directional couplers and power inserters.

DOCSIS 4.0 specifications include operation at frequencies up to 1794 MHz. Many service providers would like to futureproof their networks for eventual operation up to 3000 MHz. This document provides specifications or procedures for frequencies up to 1794 MHz.

Device specifications are segmented into classifications as follows:

  • Class 3: Products that meet specifications through 1794 MHz
  • Class 2: Products that meet specifications through 1218 MHz
  • Class 1: Products that meet specifications through 1002 MHz

Devices that meet the electrical and mechanical requirements, but not environmental are designated as “Indoor Use Only” and the products are required to be marked to guide users in their appropriate application.


Signal splitting / combining devices are an integral component of a broadband network. This specification provides a uniform method of interconnecting on-premises devices with acceptable electrical and mechanical performance.

Intended Audience

This document is intended for installers, equipment manufacturers, and end users of this product.