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That depends on what you want to use it for.... FOr Audio frequencies (but not much higher!) you would get away with what is often caleld a '*1 probe'. Just a length of coaxial cable with aBNC plgu to fit the ;'scope on one end. a probe (connected to the central conductor) and a ground clip (connected to the braid)) on the other. For higher frequecny work -- and just about anything digital -- you need a '*10 probe'. This should more accurately be called a '/10 probe' since the signal seen by the 'scope is a tenth of the signal you're looking at. The simplest form of that is again a coaxial cable with a BNC plug to fit the 'cope at one end. At the other end, the ground clip is connected to the braid as before. But now toy have a 9M resistor (forms a 10:1 voltage divider with the input impedance of the 'scope) connected to the central conductor, and a trimmer capacitor in parellel with it. This needs to have 1/9th the capacitance of the 'scope input _plus the cable_. Alternatively you could just buy a *10 probe. The spec of your 'scope is pretty standard, so any reasmable-quality probe should be usable. -tony