Abstract: A method for self-calibrating a radar system includes forming a calibration loop-back signal path. The calibration loop-back signal path is configured for determining a passband response of each of a radio frequency (RF) signal path, a local oscillator (LO) signal path, and an intermediate frequency (IF) signal path of the radar system. The method also includes transmitting a set of calibration signals into the RF signal path and the LO signal path and measuring output signals from the IF signal path in a receiver of the radar system. The method further includes determining the passband response of each of the RF signal path, the LO signal path and the IF signal path from the measured output signals and compensating for distortions and/or non-linearities in the signal paths using the passband response of each signal path.

Abstract: A method for self-calibrating a radar system includes forming a calibration loop-back signal path. The calibration loop-back signal path is configured for determining a passband response of each of a radio frequency (RF) signal path, a local oscillator (LO) signal path, and an intermediate frequency (IF) signal path of the radar system. The method also includes transmitting a set of calibration signals into the RF signal path and the LO signal path and measuring output signals from the IF signal path in a receiver of the radar system. The method further includes determining the passband response of each of the RF signal path, the LO signal path and the IF signal path from the measured output signals and compensating for distortions and/or non-linearities in the signal paths using the passband response of each signal path.

Abstract: A locking and dead bolt locking device associated with the upper rail or frame portion of a window or door sash slideable in a fixed frame, having a latching arrangement engaging a horizontal rail portion and a dead bolt arrangement engaging the frame and mounted on an upper portion of the sash. The latching arrangement includes a tongue latch portion operable normal to the plane of the window and with the dead bolt being integrally carried thereby. When closed, the tongue portion of the latch engages a striker plate of said rail while the deadbolt is engaged with the frame to prevent opening of said latch. Simultaneously, the sash is secured with respect to the frame thereby providing a dual means for securing the sash in a close position in said frame.