Open Source Agilent 53131A 53132A Ultra Stable Oven Time base option and 3Ghz Option. These Source file belog to project published on www.circuitvalley.com. #OCXO Option https://www.circuitvalley.com/2018/07/agilent-53132a-53131a-ocxo-ultra-high-stability-oven-time-base-upgrade-option-open-source.html #3Ghz Option https://www.circuitvalley.com/2018/08/agilent-53132a-53131a-diy-open-source-3ghz-channel-option-030-board-hp.html