R&D Microwaves designs and manufactures a group of components that are commonly used for Sweep and PIM field testing for DAS systems to verify component and system performance and certification. Included in this group are RF OSL (Open-Short-Load) 'Cal kits' are used to calibrate field test analyzers suitable for system segment Sweep testing for insertion loss, and return loss parameters to ensure that system design levels have been achieved. One of the products in this family of OSL's integrates a high power PIM load in one package, to reduce set up test time for PIM and sweep testing. ( Model CK-A09) .A wide range of PIM loads and OSL's are provided with all the popular connector types including 4.3-10, Type N, and DIN, with male and female connectors to reduce the need for adapters.