The HP Agilent 302A Wave Analyzer is a significant improvement in the wave analyzer design. It obviates the need for tedious calibration procedures and stabilization before use, has sharp acceptance circuits, is completely solid state, compact and easy to operate. Other exceptional features are extremely narrow bandwidth, automatic freqyency control, automatic tracking when used as a osciallator tuned-voltmeter, provision for battery operation (18 to 28 volts) as well as ac line power, and elimination of warmup time.