Digital Isolator and Analog Mode
Equipped with a high-speed digital isolator, the PMA-1600NE eliminates adverse effects on sound quality caused by high-frequency noise from a USB-connect computer or digital inputs. Since data is transferred magnetically via coils embedded in an IC chip, the input and output sides of the PMA-1600NE are electrically isolated. The PMA-1600NE also features a dedicated secondary winding in power transformer for the digital circuitry to shut out noise from the power source. Analog Mode can be used to turn off power to the dedicated digital power source and completely stop operation of the digital input circuitry, avoiding any high frequency influence on the analog section. Analog Mode also turns off the fluorescent display, allowing the PMA-1600NE to operate as a purely analog amp (during Analog Mode, USB-B, coaxial digital, and optical digital inputs are disabled).