Abstract: A cleaning apparatus for use in an inkjet imaging device comprises a wiper filament carriage; a wiper filament; and a filament tensioning system supported by the wiper filament carriage. The filament tensioning system is operably coupled to opposing ends of the wiper filament and configured to tension the wiper filament to form a substantially straight line therebetween.

Abstract: A portable calibration unit for calibrating test equipment is disclosed that may incorporate a communication interface for connecting to a computer embedded within the test equipment, a variable signal source for producing a test signal, a processor in communication with the computer for controlling the variable signal source, and a test interface for communicating the test signal to the test equipment.

Abstract: An RF test set having a concurrent measurement architecture is provided. The RF test set is adapted for testing an RF communications device such as a cellular phone according to a set of RF tests. An RF source and an RF receiver are used to communicate with the cellular phone in order to perform the call processing operations to control the cellular phone while performing parametric measurements according to the RF tests. Concurrent measurements allow operation of concurrent measurement processes and call processing operations to take place in the RF test set in order to decrease the time required for each RF test and to increase measurement throughput of the RF test set.