Tablet Oscilloscope FNIRSI-1013D with 2 Channel 100MHz Bandwidth 1GSa/s Sampling Rate Oscilloscope Multifunction, Ultra Thin Portable USB Oscilloscope

A number of reviewers have made negative comments about the performance of this oscilloscope. I have found it to be very easy to use and very useful in capturing transient waveforms for later analysis. As for the bandwidth claims, it does fall short of 100 MHz per channel, but not by much. To perform the measurement you must use a BNC 50 ohm through terminator at the scope's input port, so that the test signal is properly terminated. I used the signal generator mode of a TinySA spectrum analyzer to create accurate test signals. My measurements showed channel 1 with a -3 dB bandwidth of 85 MHz and channel 2 at 90 MHz. The response of both channels was -6 dB at 100 MHz. Measurement signal level was -7 dBm. So, for a dual channel 100 MHz scope that is portable and battery operated, I would say $150 is a good bargain.

Warning! This scope probably doesn't meet its advertised specs of 100MHz and 1GSa/s. If you check out the YouTube reviews by EEVBlog and learnelectronics, its specs are closer to 30MHz and 200MSa/s. Buyer beware!

first use item screen was no longer operational ; returned.