ANSI SCTE 161-2016 pdf download.Drop Amplifiers
1. Scope
The purpose of this specification is to recommend mechanical and electrical standards for broadband radio frequency (RF) devices whose primary purpose is to amplify signals presented to an input port and deliver the amplified signals to one or more output ports. The devices are also required to pass signals in a different range of frequencies in the return direction and, optionally, may provide amplification of such return signals. The specification’s scope is limited to 75 ohm devices whose ports are provided with F connectors. The most common use for such devices is on-premises RF signal distribution. Devices covered by this specification include products commonly known as Drop Amplifiers. They may be mounted within Network Interface Device (NID) housings on dwellings or independently within dwellings. They are not intended to be cascaded with other Drop Amplifiers. Two levels of compliance are specified. Devices meeting all electrical, mechanical and environmental specifications may be specified as meeting the requirements of this specification without qualification. Those meeting electrical and mechanical, but not the environmental requirements specified in Section 6 may be designated as meeting this specification with the suffix “For indoor use only” and the products must be marked as specified herein to guide users in their appropriate application. The specification is not intended to apply to specialty devices, nor is it intended to limit or restrict any manufacturer’s innovation and improvement.
2. Normative References
The following documents contain provisions, which, through reference in this text, constitute provisions of this document. At the time of Subcommittee approval, the editions indicated were valid. All documents are subject to revision; and while parties to any agreement based on this document are encouraged to investigate the possibility of applying the most recent editions of the documents listed below, they are reminded that newer editions of those documents might not be compatible with the referenced version.
6.1. Bandwidth
Devices shall be designed to operate with a forward minium bandwidth of 1,002 MHz. Units with a rated forward bandwidth of 54 to 1,002 MHz and return bandwidth of 5 to 42 MHz will be considered Standard Upstream capable, while units with a forward bandwidth of 108 to 1218 MHz and return bandwidth of 5 to 85 MHz will be considered Extended Upstream capable. The terminologies of Standard and Extended Upstreams are in keeping with ANSI/SCTE 135-1 2013 definitions. Other mid-split configurations are permitted as per operator requirements. However, the minimum rated forward bandwidth will be 1,002 MHz.
6.3. Gain
The forward and return gain of the device, measured from the input port to any output port for forward gain and from any output port to the input port for return gain, with all other ports terminated, shall match the labeled value with a tolerance of +2 dB/-1 dB across the full specified forward and return bandwidths respectively. If the slope plus flatness of the device exceeds this tolerance, the slope shall be separately specified and shall be indicated on the label. All measurements shall be made using the methods specified in ANSI/SCTE 144 2012. The return signal loss for devices without return amplification shall not exceed 2 dB for devices without internal signal splitting. For devices with internal splitting, additional loss is allowed in an amount not to exceed that specified in ANSI/SCTE 153 2008 for passive splitters with the same number of output ports.
6.4. Return Loss
The return loss, as measured at any RF port with all other ports terminated, shall be a minimum of 18 dB over the full specified forward and return bandwidths. All measurements shall be made in accordance with the procedures outlined in ANSI/SCTE 144 2012.
6.5. Port-to-Port Isolation
The port-to-port isolation as measured between any two output ports of a multiple output amplifier with all other ports terminated shall be a minimum of 20 dB for all devices over the full specified forward and return bandwidths. All measurements shall be made in accordance with the procedures outlined in ANSI/SCTE 144 2012.ANSI SCTE 161-2016 pdf download
