Hantek 2C42 Handheld Oscilloscope Multimeter 2 in 1 Multi-Functions Tester 2CH+DMM 40MHz Digital Oscilloscope

La pantalla tiene un buen contraste, las mediciones son correctas aunque con algo de offset, en mi caso no me afecta, el ancho de banda cumple con la especificación, se puede observar correctamente una señal senoidal de 70MHz. El generador de funciones también funciona de acuerdo a las especificaciones. En modo multímetro también trabaja bien pero las puntas de multímetro incluidas no son de buena calidad, le compré otras y todo perfecto. El balance funcionalidad precio es muy bueno, lo recomiendo.

TLDR: This is a scope with basic features but comes in at a very low price and (unlike many other cheap scopes) the core hardware meets the advertised specs. A good second scope, in my view. OK as a first scope if portability and price are critical aspects. Specifications Getting a true bandwidth measurement requires equipment that I do not have. I do have an OK 50 Mhz generator though and see little attenuation (well under 3 db) when feeding in a 50 Mhz signal. Photos of 1Mhz and 50Mhz are attached for comparison. I would say that the specified 70 Mhz analog bandwidth should be easily achieved. That said, with 250 Msamples/sec, I'd say 50 mhz is a good practical limit for single channel or 25 Mhz dual channel (125 Msamples/sec when dual channel). That's application-specific as it depends on how many samples-per-cycle you consider acceptable. Signal Generator The optional signal generator is basic but it performs its functions well. Attached photos include: - 1 Mhz sin 2V Pk-Pk driving a 50 Ohm load. Looks great. - 25 Mhz sin wave (the limit) with the same specs. A bit of attenuation but not bad. - 1 Mhz square wave with the same specs. Looks excellent with no ringing. I also measured rise time at 6.5 ns, which is excellent considering it's an overall system measurement (cables, oscilloscope, etc) - 10 Mhz square wave (the limit). As expected, it's starting to fall apart a bit at the limit. - An example arbitrary waveform: If you connect PC software, you can program your own waveforms but I have not tried. Overall PROs - Portability. Useful for applications like cars, appliances or other field applications. - It meets its specifications: Note that there is a lot of false advertising from competitors at this price point. - Price: It's very low, but watch for inflated sales prices. - Build Quality: Very impressive at the price point. They even include a nice carrying case and a bunch of useful accessories. You only get one proper probe but a second one will only cost $10 or so. - Not grounded. A bench scope is grounded which is a mixed bag in that you need to be mindful of what the ground clip touches when measuring grounded equipment (i.e. don't try measuring grounded equipment). With this Hantek, the common is floating so you are ok doing low voltage work (high voltage work still needs a differential probe for safety). Also note that the two channels of this scope are not isolated from one another (again, a differential probe is needed for this application). - Multimeter. The multimeter is basic, but it has what you need for most work. I compared it against my Fluke 115 and Brymen 869 and all three agree with one another. - Signal generator (depending on the model): See above - 18650 cells. That means cheap/easy replacements when the batteries are ready to be retired. You are giving up (verses a bench oscilloscope): - Memory depth limited to 6000 points (or 3000 per channel). This is very little memory compared to a benchtop scope. It's ok for viewing live waveforms but you don't get a nice history function, no magnify feature and there is not enough memory for quality XY plots. - Triggering and signal stability not to the level of my bench scope. Still usable. - Limited triggering. You get rising, falling, and either edge. No holdoff time. - Limited Automatic Measurements: You just get the basics of live frequency, min voltage and max voltage. No rise time, pulse width, etc. No statistics over time. - Screen is small: The smaller screen helps portability, but larger screens are nicer to work with. - Interface is more clunky. I don't think this is a deal breaker but there is more menu diving and multiple button presses to complete common tasks. Benchtop scopes generally have similar interfaces to each other so once you learn one you can mostly drive others. This one doesn't work the same so you'll need to look over the manual. - Serial decoding - no CANN, I2C, SPI, etc. These are really useful but you can get a second dedicated device relatively cheaply to cover these cases. - No FFT, although many bench FFTs are a bit of a gimmick as well.

This is supposed to be new? the screen is full of scratches like it was given to a cat to make his claws. Shamefull, that's a return for me.

Ich konnte das Gerät bisher nur antesten. Negative Eigenschaften sind mir bisher nicht aufgefallen. Für meine Zwecke (NF-Anwendungen) ist das Gerät mehr als ausreichend. Was mir aufgefallen ist: zum Laden k e i n e Schnellladegeräte verwenden. Das Gerät zeigt sonst Symptome wie bei einer defekten USB-Buchse.

Reçu rapidement mais Antek ne fournit pas le manuel et ne répond pas aux messages mail ou whatsapp