I have a rather low end need for a PC scope

[tkamiya]

I'm looking for an inexpensive low end FOUR-CHANNEL PC based scope.  Key word here is 4 channel and cheap.  Can someone help me out?

Requirements:
4 channel
20 to 25MHz bandwidth
PC interface via USB
It has to be cheap.

I am not going to use this to measure anything.  It's going to be just an indicator. 

Anyone know a product like this?

[ogden]

Unfortunately you ask for unobtainium 4-channel cheap USB scope which I am afraid - do not exist.  Default answer in case of 2-channels is obviously Owon VDS1022I - one of low cost USB scopes that actually works.

In case you are ready to reconsider, good place to start your search for low cost scope or logic analyzer: https://sigrok.org/wiki/Supported_hardware

[Fungus]

Requirements:
4 channel
20 to 25MHz bandwidth
PC interface via USB
It has to be cheap.

a) 4 channel
b) Cheap

Pick one...

[Electro Detective]

How about TWO dual channel PC scopes with some form of isolated mutual triggering?  = 

I wonder if any EEVites  have given it a go ? 

It's been on my 'try it one rainy day' list for years, but because I still use boxed scopes I haven't needed or bought a USB scope..yet

even though I've cheated a few times with buffered down sacrificial PC soundcards with poor mans 'isolation' 

[tkamiya]

I already have a Owon VDS1022I.

I wonder why cheap 4 channel doesn't exist?  It's not like I'm asking for 100MHz bandwidth.  20MHz is enough.  External trigger is a good idea though.  Owon 1022i does have a port called MULTI and it is exactly that -  external triggering.  I may have it a go with this.

Thank you.

[MarkF]

Do you really need 4 analog channels?

Are you perhaps wanting 4 channels to do serial decode?
Would 2 analog and 8 digital fit the bill?

[DaJMasta]

If the bandwidth was a bit lower you'd probably be able to find a multichannel digitizer that would be suitable, but I think that's usually going to max out around a few MS/s per channel.  There do seem to be some quad/octa channel digitizers around for mainframe systems, but I don't know of many for USB stuff.

[tkamiya]

Actually, more analog channel the better....

I have a rack mounted lab time standard.  I wanted a way to look at every wave form and do so relative to each other.  I have a DSA602 (12 channel scope) but it will heat up the room to uncomfortable temperature.  I can't afford the mainframe system.  So I was looking for PC based ones.  Price jump from 2 to 4 channel is huge. 

I'm trying to slowly reduce the number of real big and old ones.

[zomehi]

How about an old 4 channel scope from eBay?

[rsjsouza]

"Cheap" is a very fluid word. You can get a Picoscope 2405A for a list price of about $450.
https://www.picotech.com/oscilloscope/2000/picoscope-2000-overview

If you need the oscilloscope only as an indicator, why not buy four ultra-cheap toys from China? Things such as the DSO138, etc?
https://www.eevblog.com/forum/beginners/best-oscilloscope-for-complete-beginner/msg2351916/#msg2351916