Q-signals

Q-signals

A radiotelegraphy shorthand consisting of a capital Q followed by two other capital letters, some of which are used in aviation messages. The most commonly used are those associated with altimetry, QFE, QNE, and QNH. Others are listed in this section, but this is not the complete list.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The four detectors output voltages (in case of SPR) or the demodulator I- and Q-signals (in case of lowIF receiver) are captured using synchronized four-channel mixed signal scope (MSO9404A from Agilent Technologies, Inc.) with the VSA software.
The outputs of the low-IF receiver EVB are the single ended I- and Q-signals while those of the SPR system are four voltages generated by the four power detectors.
The direction-finding station transmitted bearings to the plane in a variety of "Q-signals" to keep any and all information out of enemy hands.