The term ‘Motherboard’ refers to the LORD MicroStrain® DEMOD-DVRT or DEMOD-DVRT-TC signal conditioner mounting chassis. The standard Motherboard provides a mounting slot and power to the individual DEMODs. The Smart Motherboard provides a mounting slot, power and digital communications (RS-232) to the individual DEMODs. Both Motherboard and Smart Motherboard provide analog ouput to a DAQ. In addition, Smart Motherboard provides digital output to a computer. Motherboards and Smart motherboards can accommodate 1 to 8 DEMOD cards.