bonxer
New Member
I've got a Tektronix 2212 that's quite old, and I'm using the cheapy hooks-to-BNC cables that came with my EE kit years ago. Anyway, the on-screen readout for voltage is reading multiple times the actual voltage. While I have the scope set to 5 volts/div, and connect a test signal of +5v DC source, I get the expected straight line. But the readout will sometimes say 5v, then it will change to say 50v. It will alternate between 5 and 50. It does the same when I'm viewing an RS-232 signal also. Although the actual waveform never deforms, I am concerned about its readout. At one point tonight it actually displayed 0.5kV. :shock: Turning the unit off for a few minutes and then back on solved the problem. It is now displaying all units and measures correctly. Any idea what causes this, or if this is a sign of an expensive paperweight in my near future?