After I saw some good reviews (thanks mikeselectricstuff, AndyP, nctnico, exe) I decided to buy a TO1104.
I can say that the overall oscilloscope quality is realy good.
I did some tests and everything seems to be working properly. I did not trying to use the hdmi connection).
I liked the touch screen and the option for use it with a mouse (very usefull in some cases!).
On the other hand, the probes shipped with the oscilloscope has 200Mhz of bandwidth (P130A). For a oscilloscope with 100Mhz of bandwidth, the probes should be at least 300Mhz to get an accurate measurements aroud the specified bandwidth.
I sent some suggestions to micsig to be improved on the oscilloscope software:
- the "Frequency Meter" sometimes doesn't work when the channel is changed.
- There is a bug when for example, the "PK-PK" Measure is selected. I noted it with a sinusoid of 10Mhz (1Vpp). The value of "PK-PK" changes between 992mV, 1,01V and 100mV. The 100mV value should not be displayed.
- It would be good to have an option to change only the background color of the screenshots (files saved as .png) to the white or black.
- In the same way, it would be good to have a fine adjustment of the "Time Base", since it is implemented by software (of course, since if it doesn't charge to much the processor!). I noted that the change between 2ms to the next is 4ms which normally should be 5ms. I don't know why micsig made it.
- Another thing that would be excellent to have, is a package sold separately for a power quality analyzer, to get the harmonic spectrum (in a bar format) and to give the Total Harmonic Distortion. The THD could have an option to manualy select the final harmonic analyzed (like from DC up to 25th harmonic, DC up to 51th and who knows from DC until 100th). It is a very desired functionality! The power analyzer, could be a single-phase analyzer based on the IEEE Std. 1459-2010 to give the power indicators like S (apparent power), P (active power), N (non-active power), PF (power factor), S1 (fundamental apparent power), P1 (fundamental active power), Q1 (fundamental reactive power) and DPF (displacement power factor). Lastly, it would be good to have a switching losses analyzer.