The ZX76-31R75PP+ is a 50 ohm digital step attenuator model which provides adjustable attenuation from 0 to 31.75 dB in 0.25 dB steps. The control is a 7-bit parallel interface, with a single positive supply voltage. Control lines are buffered by Schmitt Triggers to allow a wide range of control voltage levels. The model is produced using a unique unibody case package for ruggedness and operation in tough environments. Wide frequency range from 9 kHz to 6.0 GHz.