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Still having no joy with the PC interface though (hint).
I would speculate that they are still fakes, but probably of the better side of the spectrum. I'm almost tempted to get some (mosfets, I think, as they're the easiest to test for basic parameters) and see how far the fake inductry has progressed .It is usually not too difficult to find more modern semiconductors from a genuine source, so please don't undermine them by dealing with far eastern fake suppliers.
Can the TSA do amplitude modulation?
Put in some AM at about 10% of the frequency.
It only supports a limited number of amplitude levels (I think 8 or so) for the the modulating signal, so it's a "stair step sine wave".
And the modulating signal is limited to 10 kHz.
EDIT: See also Erik's video: https://youtu.be/U2cw0bmuSLM?t=239
The TinySA supports 8-point interpolation, while the Ultra can muster up to around 128 points depending on modulaton frequency.
Ok, no problem.
I'm just wondering how the Siglent is cheating to get that display. The Rigol isn't doing anything wrong, it's doing the correct math for the limited information it has.
The original Signal can be reconstructed with much wider filters but they'll only work if the signal is perfectly periodic.
I was wondering what happens if the signal isn't periodic. It could go very wrong.
There are specific posts in this thread covering most of this, but a summary doesn't hurt.
Rigol Pros: HDMI, VESA mount, WiFi built in.
Smaller size, battery option, more accessible UI, easy/neat Wifi with web/ftp access to the 'scope...Rigol can go to 100MHz (or 125MHz) but is severely limited by its sampling rate.
Nope. Rigol can go to 280Mhz measured bandwidth, and shows signal far beyond that.
I wouldn't leave it at that bandwidth for general use but it's there if you need it and it only takes about 10 seconds to switch the model.
There's also 225MHz, 200Mhz and 125MHz options.
The lower sample rate sounds scary but when you're looking at real-life signals with probes clipped onto wires? Not so much.
(And there's no problem at all with 1 or 2 channels)