In this video, I did a review and teardown of the upgraded version of the handheld DSO/DMM/Signal Generator combo device the ZOYI 703S from Zotek. Product link: https://ban.ggood.vip/14Iq4 coupon code:BGc8cf3b
Correction: As viewers had pointed out, there is relative measurement mode. The power button is duplexed as the Rel button.
Teardown pictures: http://www.kerrywong.com/2024/05/11/teardown-pictures-of-a-zotek-zt-703s-handheld-oscilloscope/
https://youtu.be/n58H1v0Wa5w
https://youtu.be/msZOJCR--Dg
00:00 Overview, compared to ZT-702S
02:46 Power on
04:39 Auto acquisition issue in DC coupling mode
07:22 Basic measurements
09:06 Bandwidth measurement
13:01 Modulation signals, Lissajous figure
14:50 Function generator mode
17:23 Another signal generator mode?
18:50 Multimeter mode, DC accuracy, mV range
23:23 Bar graph update speed, other ranges
26:34 AC measurements, current measurements
30:05 Teardown, current consumption, conclusions