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SR760 and SR770 FFT Spectrum Analyzers

Data taken with the SR760 and SR770 can be processed withthe built-in trace calculator. Basic arithmetic functions such asaddition, subtraction, multiplication, division, square rootsand logarithms can be performed on traces. Traces can be combined with other on-screen traces, or with traces stored on disks. These calculator functions are quite useful for performing background subtraction or normalization of data. All traces, data tables and limit tables can be stored using the3.5 Markers Easy to Interface " disk drive. The drive uses standard DOS 1.44 Mbytedisks (720 kbyte for SR760) which can be formatted on theanalyzer or on your personal computer. Data can be saved in aspace-saving binary format, or an easy-to-access ASCII format for off-line analysis. Avariety of hardcopy options let you easily print data from the instruments. The screen can be dumped to a dot-matrix printer or a LaserJet compatible laser printer via the standard rear-panel Centronics printer interface. Complete limit and data tables, as well as a summary of the instrument settings, can be printed. Data can be plotted toany HP-GLcompatible plotter with an RS-232 or GPIB interface. source is synchronized with the instrument's input allowingtransfer functions to be measured with 0.05 dB precision. The SR770 measures the magnitude and phase response of control systems, amplifiers and electro-mechanical systems, and displays the resulting Bode plot. Limit and Data Tables fundamental. Sideband analysis lets you compute power in aset of sidebands relative to the carrier power. And band analysis lets you easily integrate the power in a selected frequency band. All three analysis modes provide clear, on-screen markers which make it easy to pick out frequencies of special interest, such as harmonics or sidebands. Math Functions Flexible Storage and Output The SR760 and SR770 have a marker that is designed to befast, responsive and flexible. The marker can be configured to read the maximum, minimum or mean of a selected width of display, or can be set to tracking mode to lock on to a moving peak. Delta-mode readouts let you easily view frequency or amplitude differences between two peaks. Automatedpeak-find lets you quickly move between the peaks in aspectrum. And the markers for the upper and lower displays can be linked to display similarities or differences in the two spectra. All functions of the analyzers can be queried and set via thestandard RS-232 and GPIB interfaces. Acomprehensive set of commands allows complete control of your analyzer from a computer. Data can be quickly transferred in binary format, or more conveniently in ASCII format. The complete command list is available as a help screen in the instruments for convenient reference while programming. Sometimes it is important to keep track of a few key portionsof a spectrum. Data tables allow up to 200 selected frequencies to be displayed in tabular format. Automated entry makes it easy to set up data tables for harmonic or sidebandanalysis. Convenient limit tables allow the entry of up to 100 separate upper or lower limit segments for pass-fail testing.On exceeding a limit, the analyzers can be configured togenerate a screen message, an audio alarm, or a GPIB service request. Three built-in analysis modes simplify common measurements.Harmonic analysis computes both harmonic power and THD (Total Harmonic Distortion) relative to a specified Analysis Modes Limit and data tables Harmonic distortion

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