Abstract: A test apparatus and method of testing a DUT are described. The apparatus includes a receiver and transmitter path each having a pair of switches that switch between a bypass position and a direct position. The bypass position is used for low frequency signals communicated through the apparatus. The direct position allows higher frequency signals to be double converted by upconversion to an IF signal and bandpass filtered before being downconverted to a predetermined frequency. Both variable and fixed LO signals are used to convert the double converted signals so that the same IF may be used independent of the higher frequency signal received or transmitted. Bandpass filtering is applied before and after amplification of the IF signal. Lowpass filtering before and after the double conversion use LPFs of different cutoff frequencies.

Abstract: A test apparatus and method of testing a DUT are described. The apparatus includes a receiver and transmitter path each having a pair of switches that switch between a bypass position and a direct position. The bypass position is used for low frequency signals communicated through the apparatus. The direct position allows higher frequency signals to be double converted by upconversion to an IF signal and bandpass filtered before being downconverted to a predetermined frequency. Both variable and fixed LO signals are used to convert the double converted signals so that the same IF may be used independent of the higher frequency signal received or transmitted. Bandpass filtering is applied before and after amplification of the IF signal. Lowpass filtering before and after the double conversion use LPFs of different cutoff frequencies.

Abstract: Low cost test for Integrated Circuits or electrical modules using a reconfigurable logic device is described. In one embodiment, the invention includes configuring a reconfigurable logic device to comply with input standards of a device under test, applying test signals to the device under test, detecting output results of the device under test, and analyzing the detected output results.

Abstract: A method and apparatus for permitting diagnostics in a PC is described. Signals, imperceptible to a user, are transmitted through the LED used to indicate on/off power status. A small hand-held device may be used for detecting and interpreting the signals and to provide a visual indication to the user of a particular problem.