Even so, he couldn't sort out the sloping noise floor or the weird cone shaped "peaks".
This may be an accurate evaluation of the applied signal.
Maybe, but it's not the only place I've seen it, eg. Here's a comparison with a Picoscope:
Picoscope:
Siglent shows the same signal with cone shaped peaks and sloping noise floor:
Images taken from this thread: https://www.eevblog.com/forum/testgear/siglent-sds1104x-e-fft-frequency-centering/
FFT Resolution Bandwidth is too low, try increasing capture time.
Or just zoomed out a lot and half the first peak cropped off to hide it...
Or just zoomed out a lot and half the first peak cropped off to hide it...
Well then, from your post above, half the PicoScope first peak must be 'cropped off' to hide something...
The reason I'm not buying the 1013d is that I am thinking about buying a Siglent 1202X-E. It's available though German shops and I will have a more mature product, higher bandwidth, etc.
In fact, I wonder whether one could not simply build a professional scope (like a Siglent 1202X) with a larger screen and an extended version of such a user interface. Fine tuning could be implemented with sliders that are displayed on demand. Coarse adjustments would continue to be simple touch gestures. This 1013d seems to lack two finger gestures. Using those could yield additional improvement of the touch interface.
The reason I'm not buying the 1013d is that I am thinking about buying a Siglent 1202X-E. It's available though German shops and I will have a more mature product, higher bandwidth, etc.
Another drawback of the 1013d is the battery and the power via USB.
Given the rating (5V 2A), it will be hard to find a proper charger. Also, I do not trust the USB charger than comes with it. Better would have been USB PD via USB-C. Then I could have used a notebook USB-C charger or a USB-C PD power bank. 4 hours of usage on battery after charging it for 4 hours is great. Also, having it connected to the power 24/7 while it's standing on my desk seems like a bad idea. The battery will probably suffer, and, as I said, i don't trust the charger. Does it have a mini or micro USB plug?
Same form factor and touchscreen as a 1013D, more powerful than a Siglent.
OK, a bit more expensive than the Siglent but if that's what you're after then it's worth saving up a little bit more.
QuoteOK, a bit more expensive than the Siglent but if that's what you're after then it's worth saving up a little bit more.
A good bit more expensive.
Could you measure the resistance between the two BNC shieldings?
Looking at the pictures, it appears to me that the shielding of the input BNC connectors are actually not grounded.
Could you measure the resistance between the two BNC shieldings?
I bet it's ~= 0 Ohms...
Could you measure the resistance between the two BNC shieldings?
I bet it's ~= 0 Ohms...
Yes it is.
So, have you received your 1013d yet? And what's your verdict?
Quick overview, same as what others have seen;
Three of us at work bought them, none of them can be regarded 100MHz scopes. Even using HP 500MHz @10:1 probes (just to make sure its not an issues with the supplied probes), the highest frequency you will see is about 85MHz with a sine input before its starts showing nonsense (signal starts looking like its modulated/unstable), and its attenuated quite a bit.
At my most optimistic I would say its a 40MHz scope.
Quick overview, same as what others have seen;
Three of us at work bought them, none of them can be regarded 100MHz scopes. Even using HP 500MHz @10:1 probes (just to make sure its not an issues with the supplied probes), the highest frequency you will see is about 85MHz with a sine input before its starts showing nonsense (signal starts looking like its modulated/unstable), and its attenuated quite a bit.
At my most optimistic I would say its a 40MHz scope.
That makes perfect sense for a 100Mhz sample rate. Nyquist will be at 50Mhz and that's your maximum frquency, but Nyquist is a very theoretical thing and requires an infinitely wide filter to get the original signal back.
On any practical device you'll start to get artifacts that look like AM as you approach Nyquist, this is due to the samples moving in and out of phase with the peaks and zero crossings in the signal.
The highest frequency you can hope to see correctly will be approx Nyquist/1.25 which just happens to be 40MHz. Bingo! Math, it works.
I'm still mulling over whether to get one of these. OTOH it might be better to sell my Rigol DS1054Z and put the money towards a Micsig.
One question: How shiny are the screens on these? The screens on Micsigs look awfully shiny in videos. I hate that.
I would claim that the scope cannot display a 85MHz sine wave, if the sampling frequency is 100MSa/s. You need at least 2 samples per period of the sine wave. I conclude that this a 200MSa/s scope. But of course, results start degrading much earlier than samplefreq/2. Hence, the results starts becoming unreasonable above 40MHz (which would mean 5 samples per sine wave).
Anyhow, a Mini DS213 has a 100MSa/s samplerate, the price is higher, the display is smaller, and it has no touch screen. So maybe the 1013d is a reasonable choice for its price point?
As for the screen, its shiny, as shiny as the Micsig for all intents and purposes.