Review on OTC 3840F 2 Channel Automotive Scope by Timothy Wall

This area is missing in many areas. , You may not realize how important it is to be able to view, play, print, capture and replay wave patterns. This oscilloscope will not perform this task in a useful manner. Example: when you do a relative compression test, once you stop cranking, the waveform disappears forever and you can no longer view it. Someone has to start the engine. as you watch the pattern develop, press and hold it, then save it to one of four locations. This saved pattern cannot be increased or the time base or pitch changed. However, if you save, that's all you get. Other oscilloscopes have a volt meter along with the waveform/trace. Peak-to-peak, Hz, duty cycle, cursor values, etc. The OTC 3840f has that too, but only if you use it in component mode. Read the screen grid. You can't see the screen at all when you're outside in the sun. Better be quick because the battery lasts about 20 minutes, or use it with an AC adapter. Fully charged battery. completely dies in two days of non-use. Probe tips, clips, etc. fit so loosely on the scope's cables that the spring-loaded covers will shoot them into the engine bay without warning or fall off during testing. Let me tell you how I really feel I got an OTC 3840f for free in a promotion with a Scantula, but it wasn't worth it. Don't waste your hard earned money on this crap!