STC–MFIRL4201 is an high precision Mandrel Free Insertion and Return Loss test station, which is widely used to measure insertion and return loss value for optical fiber, passive components, and fiber optical communication system. This test station also available for dual channel design, which is highly speed up the testing efficiency. This is a useful tool which makes efficient measurement for the optical return loss and also provides a good solution for the return loss measurement on the optical fiber cable which cannot wrap during measurement. Specifications