I do all of my work on an L shaped bench and my whole area is incredibly noisy. I have everything here my starlink router my PC ect. All of this creates some real nasty noise in the low voltage readings on the scope and bleed through into my signal generator leads also. It can get rather anoying to try to do any readings near that low voltage area as it can get drowned out by that noise. I am fairly sure that there is little that can be done for it other than move the bloody stuff somewhere else. Problem there is my little Cabin in the woods has very little room to move anything wherever I put it in the place makes little to no difference. I can't blame anyone else because I well live in the woods and no one is around me yet. So I guess I just answered my own question. Not a thing can be done about it just live with it. or turn it all off while I measure my low voltage signals.

 

You don't say what "the low voltage area" is. Measuring millivolts is a lot different than measuring nanovolts (and, oh, do I have some stories about doing the latter!).

If you want to make low-noise measurements, then you need to make them in a low-noise environment.

One option is to make a Faraday cage, probably out of copper mesh, large enough for your measurement system's sensitive portions. How careful you have to get about aperature openings, such as door seams, depends a lot on frequency. You may find that just getting an old microwave oven and using it as a Faraday cage may yield surprisingly good results, but there's a lot of variables involved.

Shutting down your transmitting sources will certainly help, but keep in mind that if your Starlink router is receiving a signal, that means that there is a signal there to be received whether your router is there or not.

Also, be sure that you are following good basic measurement practices, such as using twisted pairs for your measurement leads, having good grounding, avoiding ground loops, controlling image currents, etc., etc.

 

Well between the signal generator at the moment set up to deliver 300mv pk 720 the noise on the square wave is at almost 80mv with fairly large spikes up to 200ma. some only comes through about 1once or twice / full sweep every 1.3ms I see it twice most of it though is at about 80mv all the time. Hard time near there holding the frequency and bounces things around quite a bit. But from what I can tell it's not going away unless I turn the whole thing off router and computer monitor to.

 

It might be caused by mains borne noise that could be fixed by suitable mains filtering at the signal generator/scope mains input. This would be a fairly cheap fix, but might involve trying differing filter options.

You could also consider powering the signal generator/scope from a portable power station – one capable of powering a signal generator & scope, plus other low power devices could be had for less than $100. But you’d need a PSU to keep it charged, or maybe install solar panels.

Maybe you could borrow a portable power station to see if that works, before buying one.

 

It might be caused by mains borne noise that could be fixed by suitable mains filtering at the signal generator/scope mains input. This would be a fairly cheap fix, but might involve trying differing filter options.

You could also consider powering the signal generator/scope from a portable power station – one capable of powering a signal generator & scope, plus other low power devices could be had for less than $100. But you’d need a PSU to keep it charged, or maybe install solar panels.

Maybe you could borrow a portable power station to see if that works, before buying one.

Well that could be done from the signal generator side it runs on a DC supply anyway I wish I could do it with the scope but I don't see a way. Not sure where a digital scope can use 120V input to drive anything but a switching power supply. there should be a 12 V portable input in these small under 40Mhz scopes. Mine tells me it's 100 but I don't see it working well at that frequency I figured about 40% of that is where it is best used. But yea I'll look into the filtering thing but most of the noise is of a higher frequency than that. I thought maybe a little tin foil hat for both of them. But then nahh that wouldn't work.