"Smokestack" LCD Readout While in the Spectrum Mode, the LCD screen produces a "smokestack" display of vertical bars that detail the level and frequency of the harmonic noise present in the measured signal. This type of display is ideal for examining the harmonic noise commonly associated with energy radiated from the power lines of an electric utility. The LCD screen also displays other pertinent measurements, such as; Circuit Loss, Circuit Noise and Power Influence. 600 Ohm, 900 Ohm and bridging input impedances are also provided as well as selectable weightings (C-Message, 3KHz Flat & 20/F) or [Psophometer, 3KHz Flat (C.C.I.T.T.), 1/F & None]. Peak Finder This feature enables you to move from one spectral peak to another, either in the left or right direction. This eliminates having to scroll through each and every spectral measurement just to view peaks. "Green Window" Test Sometimes referred to as the "Probe Wire Test", the Green Window Test is a function that enables you to gather useful information about the power line in a very simple manner. Once the power line height is entered, The Mitigator will automatically measure and compute the Ground Return I T, C-Message [PMSG] noise per mile [KM] and 60Hz [50Hz] voltage per mile [KM]. Data Logging This feature enables you to save data over a specified amount of time at specified intervals using the internal, real-time clock. The data is stored in non-volatile memory which can be recalled and displayed on the LCD screen or printed out via the RS- 232 Port and external serial printer. Zoom Mode In the "ZOOM" mode, the LCD screen can "zoom in" on an offending frequency, enlarge it on the screen, and display it along with adjacent frequencies on either side of it. There are three levels in the "ZOOM" Mode: Low, Medium and High. Geiger Mode The "GEIGER" mode allows you to select a function that acts like a Geiger counter. In this mode, The Mitigator can be used to search for the source of user-definable noise. A beeper in The Mitigator beeps faster as the source of noise increases in level. When used in conjunction with a loop coil, this function allows you to employ a "search-and-find" technique for locating the noise source. The beeper allows you to search for the noise without looking at the front panel. This is particularly helpful in situations when you are searching for a noise source while operating a motor vehicle. Analysis Mode The "ANALYSIS" Mode is a sub-feature of the Spectrum Mode. The Analysis Mode uses data gathered in the Spectrum Mode and enters that data into a probability matrix containing common problems that relate to power lines. The problems are then displayed in order of highest probability. Three-Way Power Operation The Mitigator can be powered by three different methods: an AC Power Pack, an internal rechargeable battery and a 12 volt vehicle system (cigarette lighter). Standard household current (120Vac) [47 to 63Hz, 218 to 264Vac] will power the unit through the AC Power Pack and also recharge the internal battery which will operate the unit for approximately 2 hours on a full charge. The internal battery can be completely recharged overnight. A unique topology also allows the internal battery to recharge from a 12 volt vehicle system. All three interfaces are included with The Mitigator. Serial Printer RS-232 Port With the use of an external serial printer and the RS-232 Port, you can produce a customized, detailed hardcopy analysis of all tests previously saved in the unit's non-volatile memory. This hardcopy documents your measurements and can serve as a basis for helping to solve the noise problem at its origin. Harmonic Current Probe Input When used with the optional Triplett Harmonic Current Probes (Model HC-10 and Model HC-100), The Mitigator will display Amps in either a spectral or an RMS format. The HC-10 allows measurements up to 10 Amps while the HC-100 allows measurements up to 100 Amps. This feature is particularly useful for evaluating telephone cable sheath current and for tuning Harmonic Suppression Reactors (HSR).