I don't have an oscilloscope in hand yet, and thought about something compact which I can use for debugging and tuning analog synths. Will this do the work ? http://www.ebay.com/itm/ARM-DSO-Nano-Pocket-Sized-Digital-Oscilloscope-/200470598507?pt=BI_Oscilloscopes&hash=item2eacfa936b#ht_7624wt_906