#104 A closer look at the OWON HDS272S Scope meter

Excellent review. You answered a lot of questions I had.

Damn i just found that channel because I'm interested in buying the HDS2102S... And wow this is so interesting to watch... Well made video!

I have just bought one of these in part based on your review. I needed a scope with mains isolation for making some measurement on a floating earth arrangement. I will probably do a review on my channel but I thought your review was very good. Thanks regards chris

That was an excellent review! You have gone very thoroughly through every aspect of the oscilloscope and verified its accuracy using quality equipment. Nobody does that with this kind of detail really. Your review was more that i would hope to find, thank you for the huge effort. Only comment i have is that you probably only did it injustice in terms of noise sensitivity since most of it was probably caught by the external wiring in 15:00. Except for the amazing specs verification you have done, It would be nice to see an additional video concerning actual use cases such as noise measurment (ex. ps ripple with paperclip or tip and barrel method) or trigger use cases (like transient, rise/fall time measurment or ringing) etc. Even if you are not interested in a follow up video your review was excellent and as i said more than i would hope to find. Thank you for the effort.

For a square wave at 20MHz, only the first two components (20MHz, 60MHz) are within the scope's spec'd bandwidth, so I wouldn't expect it to be all that square. At 50MHz, the third harmonic (150MHz) is well outside of the spec'd bandwidth, but furthermore, with a sampling rate of 250Msps, shannon-nyquist sampling theorem tells us that it's impossible for us to even hope for any frequency components above 250Msps/2=125MHz. Your Rigol measures 1Gsps, so it could theoretically detect frequencies up to 500MHz - well past the theoretical capability of the HDS272S, even if they had the exact same analog front-end. Nothing wrong with your testing, and nice to see the comparison, but I would have liked to see you talk about this aspect of the square wave testing, explaining why the 50MHz sine looked fine, but not the 50MHz square.

Best review of this meter, excellent.

I really like this device, especially at that price point (HDS242 ~$100, HDS272S ~$200).

When the high sensitivity to the nearby switching power supply in 10mv/div showed, it looked like a BNC was plugged in going to the red multimeter and then going to the test source via single wires. I suspect it came mainly from there, it is the probing which picks the noise up, i don't think the scope itself is so susceptible as it also has some shielding for the input section. I even would think it is better with a probe connected compared to a bench scope where the BNC ground is connected to the power input earth.

thank you! when will you post a video about the use of this 727S in audio amplifier test?

Could the ADC being overclocked be a factor in the temperature sensitivity of scope measurement you mentioned around 17:00 in the video? Really appreciate your review and analysis. Very helpful and learned a lot from your expertise. Just bought it after your review. Keep up the excellent sharing of knowledge.

Hello, does this unit have data recording capability in multimeter mode, for example when measuring mV? Great video!

Great review! Could you please also have a look at the Owon TAO3122A which is a Tablet scope with 14bit vertical resolution. A comparison between Owon, Migsig and Siglent would be also very interesting!

Just use an external usb battery pack to use or recharge it. Keep your isolation that way.

Can you do test for hanmatek scope too?

Excellent video on the technical aspect of the meter. I have some issues with the instrument. Using the buttons to do things is so confusing. The manual does not show complete operations to reach the different functions. As an example, I accidently changed the language to Russian. Took me an hour to get back to English and I still don't know how I got there. Very poor manual. Scope also does not display values such as RMS or Peak values of the waveform display. These would be quite useful and basic measurements. The meter can also save four reference waveforms, yet when called up, they are a reduced bandwidth version. Not like what was captured.

Hello, can you use the multimeter leads to input and see the sinewave from an electrical socket? I've been searching everywhere for this answer as i'm new to oscilloscopes.

Hi, I am not very experienced with Oscilloscopes - hwr, is ist possible fi. to measure and store a voltage measurement like every few seconds over hours or days with this one? Fi. to graph a battery discharge/charge diagram?

10:53 - ИМХО это не проблема осциллографа, а проблема щупов/кабелей/грамотного подключения с согласованием импедансов ... по хорошему, читобы проверить осцилл., нужен генератор с выходным сопротивлением 50 ом - 50-ти омный кабель - 50-ти омный вход осциллографа ... если у осцилла нет 50-ти омного входа, есть специальные 50-ти омные нагрузки на кабель(50 ohm cable load bnc) ...

this looks very similar to the Hamtek HO102s

I'm surprised the signal ground and signal test ground are not floating as you can use the signal generator and the oscilloscope at the same time.