I have a tektronix 2215A and a DSO Nano(Seeed Studio) and a Fluke 73iii DMM. I also have a cheap function generator, a Mastech 2MHz. So I was messinga round with the function generator and viewing some wave forms on both of my scopes. At the same time, I had my fluke hooked up to measure the voltage output. The function generator I have only displays the frequency so I had the DMM hooked up to compare the voltage to what my scopes were displaying. Both scopes were hooked up to the same points at the same time and displayed the same waveform with identical frequency and voltage amplitude. However, the voltage level on the scopes would not match what my fluke was reading. I also switched everything over to a dc output and again, the scopes would show the same constant dc signal but its magnitude would differ from the DMM reading.
I don't recall the exact numbers when looking at sine waves and ac amplitude but I do recall the dc readings. I had the function generator outputting 10vdc per my scopes display, but my DMM would only read 9.3 or so. I thought maybe my fluke was a little off but I hooked it up to my dc power supply which has its own voltmeter and the readings on the DMM and PSU voltmeter were identical.
Any idea/insight as to why the readings would differ from my scopes to my DMM?
I will get some pics up soon to give you a visual of what I am talking about/asking.
Also, a side question...my tektronix 2215a trace is flashy. I can see the waveform fine but is there a setting to allow the trace to be solid and not flashy? It might just be my unit, it is old and purchased on ebay. I am quite thrilled that it displays correct waveforms but was just hoping I could get that trace to not be so choppy.
I don't recall the exact numbers when looking at sine waves and ac amplitude but I do recall the dc readings. I had the function generator outputting 10vdc per my scopes display, but my DMM would only read 9.3 or so. I thought maybe my fluke was a little off but I hooked it up to my dc power supply which has its own voltmeter and the readings on the DMM and PSU voltmeter were identical.
Any idea/insight as to why the readings would differ from my scopes to my DMM?
I will get some pics up soon to give you a visual of what I am talking about/asking.
Also, a side question...my tektronix 2215a trace is flashy. I can see the waveform fine but is there a setting to allow the trace to be solid and not flashy? It might just be my unit, it is old and purchased on ebay. I am quite thrilled that it displays correct waveforms but was just hoping I could get that trace to not be so choppy.