A powerline communication power supply and modem interface can be implemented using a power supply processing unit coupled with a PLC modem unit. The threat agent deposited on the substrate is illuminated with a plurality of photons to thereby produce Raman scattered photons. If a delta-difference between the requested document and the base file is less than a predetermined threshold value, create a condensed document by abbreviating redundancy in the requested document relative to the base file of the associated document class, associate the document with the document class, and transmit the condensed document to the user.