HYG tests every patch cord connector to make sure that every patch cord is in best condition before delivery.  HYG's polishing process ensures consistently low insertion and high return loss values. Insertion and return loss     values are affected by the endface geometries of the fiber connector. HYG's fiber assemblies meet Telcordia®       GR-326 industry requirements for quality and performance.

1) Ferrule Surface Inspection

Every connector is inspected with 400x microscope  to          ensure there is no visible scratch on the fiber. As shown in   the picture, the end face should be clear and  clean.

2) Insertion & return Loss Test

Tested in accordance with the GR-326-CORE, the maximum insertion loss shall not exceed 0.3dB against master             connector. HYG typical value is less than 0.2dB.

3).Topography Measurement for Ferrule

Our interferometer can display an accurate measurement of radius of curvature, fiber height, apex offset, fiber and          ferrule roughness.   
Types: UPC Connector, APC Connector
Radius of Curvature: 10 to 25 mm, 5 to 15 mm
Apex Offset: ≤50 um, ≤100 um
Fiber Spherical Height: -90 nm , +50 nm
Angular Offset: 8°± 0.5°C (APC)