ANSI SCTE 132-2019 pdf download.Test Method for Reverse Path (Upstream) bit error rate
1.1. Executive Summary
This procedure defines a method of measurement for bit error rate (BER) in the return path of active Cable Telecommunications equipment. It is intended for measurement of 75-ohm. See the Cable Telecommunications Testing Guidelines document, ANSI/SCTE 96 2013, for a discussion of proper testing techniques.
1.2. Scope
Since the introduction of Cablelabs DOCSIS 3.1 specifications, QAM channels have been sharing the upstream spectrum with OFDMA channels. Through Proactive Network Maintenance (PNM), DOCSIS 3.1 specifications leverage CMTS and cable modem features and capabilities to enable measurement and reporting of network conditions and their effects. These measurements include FEC statistics (BER) as measured by the CMTS on upstream OFDMA channels. Accordingly, the scope of this test was not broadened to cover OFDMA channels. Instead, the reader is referred to the DOCSIS 3.1 specifications. For bit error rate measurements in the forward path see ANSI/SCTE 121 2011.
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.
2.1. SCTE References
• ANSI/SCTE 96 2013: Cable Telecommunications Testing Guidelines
2.2. Standards from Other Organizations
• DOCSIS 3.1, Physical Layer Specification, CM-SP-PHYv3.1-I13-171220, December 20, 2017,Cable Television Laboratories, Inc.
2.3. Published Materials
• No normative references are applicable.
3. Informative References
The following documents might provide valuable information to the reader but are not required when complying with this document.
3.1. SCTE References
• ANSI/SCTE 121 2011: Test Method for Downstream Bit Error Rate
3.2. Standards from Other Organizations
• No informative references are applicable.
3.3. Published Materials
• No informative references are applicable.
4. Compliance Notation
This word or the adjective“required” means that the item is an absolute requirement of this document. This phrase means that the item is an absolute prohibition of this document. This word means the value specified shall never be used. This word or the adjective“recommended’ means that there may exist valid reasons in particular circumstances to ignore this item, but the full implications should be understood and the case carefully weighted before choosing a different course. This phrase means that there may exist valid reasons in particular circumstances when the listed behavior is acceptable or even useful, but the full implications should be understood and the case carefully weighed before implementing any behavior described with this label. This word or the adjective“optional?’ means that this item is truly optional. One vendor may choose to include the item because a particular marketplace requires it or because it enhances the product, for example; another vendor may omit the same item. Use is permissible for legacy purposes only. Deprecated features may be removed from future versions of this document. Implementations should avoid use of deprecated features.
5.2. Definitions
The ratio of error bits to the total number of bits transmitted. BER is normally expressed as the negative exponent of a number. E.g. 1 x10-7 meaning that 1 out 1 0,000,000 bits is in error. A system of error control for data transmission wherein the receiving device has the capability to detect and correct any character or code block that contains fewer than a predetermined number of symbols in error. The number of symbols transmitted over a given time.ANSI SCTE 132-2019 pdf download
