Bros,Hindi na calibrated yung mga oscilloscopes...Meron ako pangcalibrate sa opis pero hangang 200MHZ lang...Wla ako manuals...yung manuals ko lang na akin yung pang 540b...yung probes ko pang 744a and 540b.magtinign ako sa actual/physical inventory ko..Re prices for 744a, no problem negotiable yan mga equipments ko...bastat taga Pinas...For inspection nasa alabang office ko eto...if you are keen or want to view some test equipments just let me know...For 2230 and 2467b may voltage selector yan yung iba auto volt...