ANSI SCTE 125-2018 pdf free download – Hard Line Pin Connector Return Loss.
1.1. Executive Summary
This test procedure applies as a method to measure the return loss of hard line pin connectors.
1.2. Scope
This document describes a procedure to measure the return loss characteristics of a single hard line pin Connector interfaced between hard line cable and a precision airline. It implements the time domaingating features of the network analyzers, which removes the interfaces, and far end termination from the
DUT (device under test) measurement.
1.3. Benefits
This test procedure provides a common method that can be used by both manufacturers and end users to test whether hard line pin connector models meet return loss specifications. Without such a common test procedure, the testing used to prove Hard Line Pin connector return loss performance can vary and lead to uncertainty as to whether the connector return loss specifications are being met.
1.4. Intended Audience
The intended audience for this test procedure are manufacturers, evaluation laboratories, and end user technician and engineers with the proper equipment to perform this testing.
1.5. Areas for Further Investigation or to be Added in Future Versions
At this time, there are no areas for further investigation for this test procedure.
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 15 2016 Specification for Trunk, Feeder and Distribution Coaxial Cable
2.2. Standards from Other Organizations
• No normative references are applicable.
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
• No informative references are applicable.
3.2. Standards from Other Organizations
• No informative references are applicable.
3.3. Published Materials
• No informative references are applicable
6. Equipment
• vector network analyzer (VNA), with time domain capability: Agilent 8753ES with options 010 (time domain) and 075 (75 ohm ports), Keysight E5061B with options 010 (time domain) and
237 (75 ohm ports) or equivalent.
• Type “N” 75-Ohm Calibration Kit; Agilent 85036B, or equivalent.
• Flexible Precision Test Cables; Type “N”, 75 ohm.
• 5/8-24 female to “N”male, precision adapter, return loss, ≥ 40 dB.
• Hard line cable that meets the requirements of ANSI/SCTE 15 2006, 75 ohm, length, 15 inches ±1/2 inch; cable size matches that of pin connector being tested.
• 5/8-24 female precision airline, return loss, ≥ 40 dB. See Airline Adapter Drawings in Section 8.0.
• 5/8-24 male to “N”male, precision adapter, return loss, ≥ 40 dB.
7. Set-Up
7.1. Vector Network Analyzer
• Allow equipment to warm up per manufacturer’s instructions.
• Preset
• IF bandwidth = 3000 Hz
• Dual Chan = ON; Split Display = ON
• FORMAT – CH 1 = Log Magnitude; CH 2 = Real
• START = 5 MHz; STOP = 3 GHz
• Number of Points = 801
• Set CH1 & CH2 to S11
• SYSTEM – Transform -Low Pass Step
• Set frequency Low Pass
• CH 1 –Transform = OFF; Gate Start = 4.671 ns; Gate Stop = 6.451 ns (actual settings depend on the length of input line).ANSI SCTE 125 pdf download.