Sometimes we get processors in on boards that are just too interesting, or too good looking to remove. That is the case with this KGV-25 correlator board. It is a processing systems used for decrypting communications that was in wide use by the US (and likely other) militaries in the 1990’s. The KGV-25 could receive encrypted UHF data at rates of up to 400Mbps as part of the Multi-Mission Advanced Tactical Terminal (MATT). More information on the MATT can be found here on the FAS website.