Products > Test Equipment
Tooltop ET120M $50 DSO
rhb:
FWIW Out of curiosity I bought one of these:
https://www.aliexpress.us/item/3256805182059777.html
Real BW is 28 MHz both for the square wave source and the scope input measured by rise time for the square wave and adjusting the frequency of a Keysight 33622A until it dropped to the -3 dB point for the scope.
Have Fun!
Reg
rsjsouza:
Quite interesting for the price.
Aldo22:
I think it's the same as MDS120M
rhb:
Looks like it's the same as the MDS120M. For value I think the Owon HDS2xxS series are much better.. I have an HDDS272S and it's really a 70 MHz DSO. Which foir portable use is plenty of BW.
I also have a Hantek 2D42, but it's not as good.
The 120M is a bit of a puzzle. Single channel 30 MHz with 1,10,100 & 1000 kHz square waves with a 30 MHz analog output section. For $50 delivered. In 1978 I paid $75 for a 5 MHz recurrent sweep Heathkit IO-18. This is so much better it's no contest.
But consider the following T&M suite:
TT/MDS 120M DSO $50
nanoVNA $60
tinySA $60
BSIDE ESR02 $30
Diode noise source $35
DMM $30
That's less than $300 USD for a rather complete RF T&M suite sufficient to do most HF design tasks. Not HPAK, but I've got those to compare to and have been quite impressed. That's a sea change from 30 years ago when $300 wouldn't buy a decent scope.
The 120M looks to be approximately a single channel Finirsi at less than 1/2 the price. At a day's minimum wage take home pay it's pretty attractive for a student/new HS graduate.
I'm busy building a 6 bay lab rack and populating it. Once that is done I'll post more detailed measurements.
Have Fun!
Reg
Aldo22:
Yes, the et120m is really cheap!
But for not much more money, the single-channel Zeeweii offers much more in every respect. Be it the 10mV vertical sensitivity or the signal generator with different waveforms, freely selectable frequency and duty cycle, video output, exportable screenshots etc.
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