ANSI SCTE 132 pdf free download

ANSI SCTE 132 pdf free download.Test Method for Reverse Path (Upstream) bit error rate.
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 ANSIJSCTE 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.l-113-171220, December20, 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.
6. Equipment
Oniy equipment specific to this procedure is described in detail here. ANSI/SCTE 96 2008: Cable Telecommunications Testing Guidelines, should be consulted for further information on all other equipment
6.1. Equipment
6.1.1. Digital Loading
Digital loading can consist of individual QAM channels or broadband
simulated digital noise loading (SDNL)
A. Equipment if using Simulated Digital Noise Loading (‘SDNL)
• Broadband Noise Generator
• Bandwidth equal to or wider than specified channel plan
• Variable output power or incorporates an external variable
attenuator.
• Appropriate bandpass (highllow pass) filter to shape the noise loading
in accordance with the specified channel plan
• 16 dB minimum return loss, 75ohrn
• +1- 10MHz from edge frequency, >40 dB rejection
• +1- 0.25 dB flatness
• <1.5 dB insertion loss
• Notch filters (channel deletion filters)
• Center frequency = Center frequency of test channel
• 16 dB minimum return loss, 75ohm
• Bandwidth sufficient for the modulation under test, >50 dB
rejection
• +1- 2MHz from band edge, <3.0 dB insertion loss
• +1- 0.25 dB flatness in the passband
• <1.5 dB insertion loss
B. Equipment if using individual QA M channels for loading
• QAM generators, equal in bandwidth to channel under test (Quantity = digital bandwith/QAM bandwidth -1)
• RF combiner, used to combine QAM generators.ANSI SCTE 132  pdf download.