Common use of OTDR Testing Procedure Clause in Contracts

OTDR Testing Procedure. i. An OTDR shall be used to measure and document splice losses and connector losses. To correctly identify abnormalities at a short range, a 500-meter or 1.0 km launch cable shall be used between the OTDR and the fiber under test. Bi-directional traces shall be acquired for each fiber. If the connection of the launch cable to the patch panel requires optimization by the operator, sampling acquisition will commence upon completion of the optimization. ii. Each fiber will be identified, and the results of the test for each fiber will be recorded as indicated below in the section “Test Data File Names.” The test will be repeated for each of the fibers linking a particular site. All tests will be made at 1310 nm and 1550 nm. iii. Settings on the OTDR shall be: 1. The Refractive Index shall be set for the actual fiber type under test (commonly-used Corning SMF-28 single mode fiber has a refractive index of 1.4677 at 1310 nm); 2. Pulse width no greater than 100 ns (10m) for all fiber lengths; 3. Event threshold: 0.010 dB. 4. Scattering coefficient specified by the fiber manufacturer for each wavelength tested; 5. A minimum of 10,000 sampling acquisitions (Averages); 6. Maximum range setting shall be no more than 10 km for all fiber length less than 10 km; and 7. Maximum range setting shall be no more than 25% higher than the fiber lengths under test for the fibers in the segment from the remote site to the hub patch panel. iv. Test Documentation 1. Installed optical fiber OTDR test documentation shall include: a. Total fiber length; b. Individual fiber traces for complete fiber length; c. Paper and/or computer disk records of all traces; d. Losses of individual splices and connectors; e. Losses of other anomalies; f. Wavelength tested and measurement directions; g. Manufacturer, model and serial number of the test equipment; and h. Name, signature, and company of the engineer performing the tests. 2. All data collected at each location during the tests shall be recorded by the County at the time of the tests using electronic means.

OTDR Testing Procedure. i. An OTDR shall be used to measure and document splice losses and connector losses. To correctly identify abnormalities at a short range, a 500-meter or 1.0 km launch cable shall be used between the OTDR and the fiber under test. Bi-directional traces shall be acquired for each fiber. If the connection of the launch cable to the patch panel requires optimization by the operator, sampling acquisition will commence upon completion of the optimization. ii. Each fiber will be identified, and the results of the test for each fiber will be recorded as indicated below in the section “Test Data File Names.” The test will be repeated for each of the fibers linking a particular site. All tests will be made at 1310 nm and 1550 nm. iii. Settings on the OTDR shall be: 1. The Refractive Index shall be set for the actual fiber type under test (commonly-used Corning SMF-28 single mode fiber has a refractive index of 1.4677 at 1310 nm); 2. Pulse width no greater than 100 ns (10m) for all fiber lengths; 3. Event threshold: 0.010 dB. 4. Scattering coefficient specified by the fiber manufacturer for each wavelength tested; 5. A minimum of 10,000 sampling acquisitions (Averages); 6. Maximum range setting shall be no more than 10 km for all fiber length less than 10 km; and 7. Maximum range setting shall be no more than 25% higher than the fiber lengths under test for the fibers in the segment from the remote site to the hub patch panel.. DocuSign Envelope ID: BEC22014-FB44-42A2-A4F0-A3D7312123F2 DocuSign Envelope ID: BACFA1E8-9B50-4E40-B928-AE77686FB55C iv. Test Documentation 1. Installed optical fiber OTDR test documentation shall include: a. Total fiber length; b. Individual fiber traces for complete fiber length; c. Paper and/or computer disk records of all traces; d. Losses of individual splices and connectors; e. Losses of other anomalies; f. Wavelength tested and measurement directions; ; g. Manufacturer, model and serial number of the test equipment; and h. Name, signature, and company of the engineer performing the tests. 2. All data collected at each location during the tests shall be recorded by the County at the time of the tests using electronic means.

OTDR Testing Procedure. i. An OTDR shall be used to measure and document splice losses and connector losses. To correctly identify abnormalities at a short range, a 500-meter or 1.0 km launch cable shall be used between the OTDR and the fiber under test. Bi-directional traces shall be acquired for each fiber. If the connection of the launch cable to the patch panel requires optimization by the operator, sampling acquisition will commence upon completion of the optimization. ii. Each fiber will be identified, and the results of the test for each fiber will be recorded as indicated below in the section “Test Data File Names.” The test will be repeated for each of the fibers linking a particular site. All tests will be made at 1310 nm and 1550 nm. iii. Settings on the OTDR shall be: 1. The Refractive Index shall be set for the actual fiber type under test (commonly-used Corning SMF-28 single mode fiber has a refractive index of 1.4677 at 1310 nm); 2. Pulse width no greater than 100 ns (10m) for all fiber lengths; 3. Event threshold: 0.010 dB. 4. Scattering coefficient specified by the fiber manufacturer for each wavelength tested; 5. A minimum of 10,000 sampling acquisitions (Averages); 6. Maximum range setting shall be no more than 10 km for all fiber length less than 10 km; and 7. Maximum range setting shall be no more than 25% higher than the fiber lengths under test for the fibers in the segment from the remote site to the hub patch panel. iv. Test Documentation 1. Installed optical fiber OTDR test documentation shall include: a. Total fiber length; b. Individual fiber traces for complete fiber length; c. Paper and/or computer disk records of all traces; d. Losses of individual splices and connectors; e. Losses of other anomalies; f. Wavelength tested and measurement directions; ; g. Manufacturer, model and serial number of the test equipment; and h. Name, signature, and company of the engineer performing the tests. 2. All data collected at each location during the tests shall be recorded by the County at the time of the tests using electronic means.