Question 1

What probes can I use with this scope that will allow me to look at 50 microvolt signals between 500 Hz and 30 MHz?

Accepted Answer

If you have a known gain amplifier that will work at 50 uV and at least show up on your lowest vert. input setting it should work OK for you. I've used this technique. You would use a x-1 probe. A rough measurement on a calibrated receiver would be an S-9 reading on its S-meter.

Question 2

Could I use this scope with included probes to check 110/220v AC waveform output of inverters cleanness for spikes or transients etc?

Accepted Answer

You can, but you have to be very careful of three things:  First, you are, of course, working with lethal voltages, hence caution is advised.  If you don't know the proper precautions, ask an electrician.   Second, for the protection of the scope and the probe, you might want to make an outboard voltage divider - Say 91K(@1W), in series with 9.1K (@1/4W).  Hot side of 110V goes to high end of 91K, you put the probe at the juncture with 9.1K, and the other end of 9.1K goes to ground, scope lead, and neutral.  Your voltages will read 1/10 of actual.  For your purposes, the accuracy presumably is not important.  (If it is, use 1% resistors and calibrate.)  Third, and most important:  As a rule in residential power systems, the 220 feed consists of two hot leads, derived from a center-tapped transformer.  The center tap is the  neutral and grounded at the main fuse panel.  Do NOT connect the probe ground to anything but the neutral.  You could be in for a world of hurt.  (If you want to look at both sides of the 220 at the same time, you can:  make another voltage divider, use it on channel 2.  Then if you do the math function CH1+CH2, you'll see the combined waveform.)  BTW, the waveform you get is likely to vary with the type and amount of load you put on the inverter.

Question 3

can you change the resolution of the picture save to usb feature?

Accepted Answer

I don't think you can change the screen resolution (480x234 pixels).  You can record a waveform for a length of time and save that recorded waveform to the USB device.  You can also save recorded waveforms as csv (comma separated values) files to import into a spreadsheet.  Hope this helps.

Question 4

Does this come with a Calibration Certificate?

Accepted Answer

My unit just had QC stamps. As far as calibration it is spot on when I feed it from either an RF or audio generator. The frequency counter is within 100 Hz at 100 MHz as compared to my HP 5316 counter.

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SiglentTechnologies SDS1052DL+ 50 MHz Digital Storage Oscilloscope

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