EMC-11 INTERFERENCE ANALYZER The EMC-11 Interference Analyzer is designed to perform emission and susceptibility testing to MIL-STD-461A/B, -462, -285 plus other applicable military, government, and commercial — both domestic and international — standards from 20 Hz to 50 kHz. The receiver incorporates a differential front end with a Twinax connector to eliminate ground loop problems and permit balanced or floating measurements. In addition, the receiver has four selectable input impedances, nine selectable detection bandwidths plus two selectable low pass and four selectable high pass input filter networks. A voltage controlled oscillator is used for tuning the receiver with the tuned frequency indicated by a liquid crystal display. A dual metering system, with digital and analog output meters, is used to indicate the input signal level. The digital meter (liquid crystal display) circuitry automatically adds the total receiver attenuation to the meter indication. In addition, there is a provision for displaying the actual attenuation level on the same meter when required. Meter functions include AVERAGE (CARRIER), RMS, PEAK, QUASI-PEAK, and SLIDEBACK PEAK. The receiver is amplitude calibrated using an automatic calibration circuit which eliminates the requirement for a manual IF/RF gain control function. Five OUTPUT functions, available at the front panel OUTPUT connector and selected by the OUTPUT FUNCTION Switch, are BFO, RESTORED, LINEAR VIDEO, IF, and TRACK. Rear panel connectors are provided for the X-Y plotter outputs, REMOTE CONTROL inputs/outputs plus the horizontal and vertical outputs for CRT presentations. The majority of the receiver functions can be remotely controlled using either a programmer or computer/calculator system. An IEEE Interface Bus option is also available on special request.