Osciloscope - 4 channels into 1

Osciloscope

Hi!

I have some problems to fix first I need to build a device for 2 channel oscilloscope so it can show on display 4 signals ? OK so you have some 4 different signals, but on oscilloscope you can only see 2 of that 4 signals so there must be some kind of device where you can plug all 4 signals and than connect one on the channel (1 or 2 ) from oscilloscope to that device so oscilloscope can show all 4 signals something like this




I know that Multiplexer must be used for this but dont know how??

Re: Osciloscope

I have Idea but I need your help to see is that possible

So first you all know how does Cartoon Movie work, you have lots of pictures one after one and so on, and after you speed up that pictures you get a motion and you see how everybody is moving and ect.
Now if I have 4 signals connected to the multiplexer on the output of that multiplexer I will have only one of that four signals (depends on he true table for selected inputs S1 and S2 which controls what signals will be shown at the output), and for example I get signal(1) at the output and I see that signal on oscilloscope I need it somehow to save it on oscilloscope, and few sec later I get second signal(2) at the output which I also must save on oscilloscope, and than after few sec i see third signal(3) and later fourth signal(4), All must be somehow saved on oscilloscope and now I have 4 signals one after another one same as pictures one after another one and now with the time base I speed that up and I get clearly full image which is actually 4 signals like one but you see all 4 signals ???

Is that possible to create ??

Osciloscope

I also have an idea like cipi said use a mux to switch b/w channels and then add a dc voltage depending on the channel selected for example when ch1 is selected by mux add 5v dc so that its on top of the screen and when ch2 is selected add 2.5V so its on middle of top half and so on......