HP 856 Calibration & Repair Service with 22GHz to 26.5GHz ConversionProduct Description Get professional calibration and repair service for your HP 856 series equipment including 8563e, 8562a, 8563a, 8561e, 8562e, 8565ec, and 8564e models. This service includes a conversion from 22GHz to 26. 5GHz by our specialized 856 expert. Things to Note Appearance: 80 90% new, functionally tested. As a used item, minor scratches may be present. However, all products are fully functional and come with a DOA (Dead on Arrival)