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SR760 and SR770 FFT Spectrum Analyzers

measurements will be done in as little as a tenth of the time ofother analyzers, which typically have a real-time bandwidth of about 10 kHz. The SR760 and SR770 are easy to use. The simple, menu-oriented interface logically groups related instrument functions. Context-sensitive help is available for all keys andmenus, and entire instrument setups can be saved to disk and recalled with a single keystroke. The spectrum, power spectral density and input time recordcan be displayed in a variety of convenient linear andlogarithmic units including Vp, Vrms, dBVp, dBVrms or user-defined engineering units (EUs). The magnitude, phase, and real and imaginary parts of complex signals can all be displayed. Several window functions including Hanning,Flat-Top, Uniform and Blackman-Harris can be chosen tooptimize in-band amplitude accuracy or minimize out-of-band side lobes. Octave Measurements Easy To Use Spectrum Measurements The SR760 and SR770 also compute both the 15 and 30 band1/3 octave spectra, commonly used in acoustics and noise measurement applications. A-weighting compensation isavailable for octave measurements. Amplitudes are computed for band Octave analysis With its low-distortion DDS source, the SR770 is capable ofperforming accurate frequency response measurements. The µ Vto 1 V, and delivers up to 50 mAof current. The SR770 includes a low-distortion ( − 2 (630 mHz) through band 49 (80 kHz). − 80 dB) synthesizedsource which can be used to make frequency response measurements. It generates single frequency sine waves, two- tone signals for intermodulation distortion (IMD) testing, pinkand white noise for audio and electronic applications, andfrequency chirp for transfer function analysis. This direct digital synthesis (DDS) source provides an output level from 100 Frequency Response Measurements Triggering and Averaging Synthesized Source Flexible triggering and averaging modes let you see signals aslow as 114 dB below full scale. RMS averaging provides an excellent estimate of the true signal and noise levels in the input signal, while vector averaging can be used with a triggered input signal to actually reduce the measured noise level. Both rms and vector averaging can be performed exponentially, where the analyzer computes a running average(weighting new data more heavily than older data), or linearly,where the analyzer computes an equally weighted average of a specified number of records. Triggering can be used to capture transient events or to preserve spectral phase information. Both internal and external triggering are available with adjustable pre-trigger and post-trigger delays. Spectrum analysis Transfer function (magnitude and phase)

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