Gw instek sfg 1013 dds function generator gw instek sfg 1013 p the sfg gw instek sfg 1013 is an economic function generator with high accuracy and high stability output that has been designed based on the dds direct digital synthesized technology embedded in a large scale fpga p p the 3mhz frequency range and the output waveform selection of sine square triangle and ttl available in the gw instek sfg 1013 adequately provide the fundamental functions required to ensure high conf