Abstract: Time correlation of signal to distortion characteristics is achieved by acquiring time domain data for a frequency band representing a communication signal, the communication signal having multiple channels. The time domain data is simultaneously converted to frequency and demodulation domain data in sequential time blocks. The frequency and demodulation domain data are processed to obtain respectively frequency and demodulation domain measurements. The resulting measurements are displayed simultaneously as a function of time for all the time blocks and/or for a selected one of the time blocks. An ACLRogram display provides a display having a time axis and a frequency axis in the form of bars spanning the frequency band for each time block with each bar being divided into frequency sub-bands representing a main channel and adjacent side channels, the shading of each segment of the bar representing a measurement value for that segment.

Abstract: A system for permitting insertion or replacement of electronic cards, the system includes a scanner for scanning hardcopy elements, the scanner including an electronic component for performing at least one processing function on an electronic representation of the hardcopy element; a first processor for directing operations of the scanner and for receiving directions that are passed to other components; a field-installed electronic card that performs additional processing on the electronic representation of the hardcopy element; a second processor electrically connected to the scanner for sending directions to the scanner processor which processor includes field-installed control code for directing the field-installed electronic card.

Abstract: A system for permitting insertion or replacement of electronic cards, the system includes a scanner for scanning hardcopy elements, the scanner including an electronic component for performing at least one processing function on an electronic representation of the hardcopy element; a first processor for directing operations of the scanner and for receiving directions that are passed to other components; a field-installed electronic card that performs additional processing on the electronic representation of the hardcopy element; a second processor electrically connected to the scanner for sending directions to the scanner processor which processor includes field-installed control code for directing the field-installed electronic card.