Video: Windfreak SynthNV August 30, 2013 Adam Amateur Radio, Microwaves, Test Equipment, Video 0 We take a look at sweeping an M2 23CM35 yagi for 1296 MHz using a Windfreak SynthNV USB powered and programmed RF Signal Generator / RF Power Detector from Windfreak Technologies LLC. [jwplayer mediaid=”1120″]