22-02-2016, 08:46 AM
Got the 12 volt battery back from the woods as the PP9 battery was starting to get low as these devices draw a fair amount of current, all connected up, the on board regulator gets hotter as one would expect, the output amplitude has increased but not by a great deal, with this module the +ve feed to the buffer stage can be selected from either the battery source (12 volts) or from the on board 5 volt regulator line (5 volts) The amplitude response across the range is flatter using the 12 volt supply for the buffer as opposed to the regulated 5 volt supply, I've terminated the buffer output with 50 ohms, still plenty of output to drive a mixer, the output clips a bit at low frequencies, probably due to the buffer, the actual sine out from the AD9580 chip is sine all the way, so far so good.
Lawrence.
Lawrence.
