HiQSDR TX Posted on January 17, 2012 by mario during weekend i took a screenshot of the TX signal quality of my HiQSDR PCB. As example i put the IMD spectrum for 10m here. Looks quite nice, doesn´t it ? Its the DAC signal amplified by MMIC. I think it was around 6dBm output power. HiQSDR_IMD_28MHz