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I have tested the instruments with a digital oscilloscope (TDS2004, last calibration before 2014), 1Meg of input resistance. There is a general good agreement between the settings on the panel. I have found that the amplitude of a sinusoidal signal starts to decrease in amplitude after 6MHz but nothing serious (from 3.12Vpp at 6MHz to 2.76Vpp at 25MHz, I have the 25MHz version). Frequency is always correctly set. I have tested the loading process of an arbitrary waveform from the .csv file generated by an oscilloscope. It worked smoothly. The only concern is the software, I cannot set the offset correctly from the PC software. Offset and all other controls work smoothly from the instrument panel. This is a good piece of equipment that you can use in your home lab or, on the field (you can power it with a power bank). Front panel is well organized and easy to operate. As other buyers complains: channels should be OFF at startup. Unbeatable price! Satisfied.
bu cihaz cok kullanisli ve kalitelidir. bence her labaratuar da bulunmasi gerek.