user-defined thresholds are measured with high frequency resolution, while small changes are measured using wider frequency steps between points. A choice of linear sweeps with high resolution, or logarithmic sweeps with up to eight decades of frequency range is provided.

any portion of the signal can be played back in any of the SR785's measurement groups except swept-sine. The convenient Auto Pan feature lets you display measurement results synchronously with the corresponding portion of the capture buffer to identify important features.

Top display shows a histogram of time data. Bottom

display shows the cumulative density function.

Time/Histogram

Use the time/histogram measurement group to analyze time domain data. A histogram of the time data vs. signal amplitude is provided for accurate time domain signal characterization. Statistical analysis capabilities include both probability density function (PDF) and cumulative density function (CDF). The sample rate, number of samples and number of bins can all be adjusted.

Time Capture

The SR785 comes with 2 Msamples of memory (8 Msamples optional). Analog waveforms can be captured at sampling rates of 262 kHz or any binary submultiple, allowing you to optimize sampling rate and storage for any application. For example, 8 Msamples of memory will capture 32 seconds of time domain data at the maximum 262 kHz sample rate, or about 9 hours of data at a 256 Hz sample rate. Once captured,

Unit Conversion

Automatic unit conversion makes translating transducer data easy. Enter your transducer conversion directly in V/EU, EU/V or dB (1V/EU). The SR785 will display the result in units of meters, inches, m/sec2, in/sec2, m/s, in/s, mil, g, kg, lbs., N, dynes, pascals or bars. Built-in ICP® power means you don’t need an external power supply for your accelerome- ter. Acoustic measurement results can be displayed in dBSPL, while electrical units include V, V2, dBV and dBm.

Source

The SR785 comes standard with five precision source types. Generate low distortion (-80 dBc) single or two-tone sine waves, white noise, pink noise, chirps, and arbitrary waveforms. The chirp and noise sources can be bursted to provide activity over a selected portion of the time record for FFT measurements, or to provide impulse noise for acoustic measurements. The digitally synthesized source produces

Top display shows the burst noise source. Bottom display shows an arbitrary waveform downloaded to the SR785 via the IEEE-488 interface.

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SRS Labs SR785 manual Time/Histogram Time Capture, Unit Conversion, Source
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SR785 specifications

The SRS Labs SR785 is a powerful and versatile audio analysis tool designed for audio engineers, researchers, and manufacturers. This instrument is renowned for its ability to perform a wide array of measurements, making it an essential asset for anyone involved in audio testing and development. With its cutting-edge features and technologies, the SR785 stands out in the competitive field of audio analysis.

One of the main features of the SR785 is its dual-channel capability, which allows users to analyze both input and output signals simultaneously. This is particularly useful for applications such as loudspeaker testing, where comparing the input signal against the output can provide valuable insights into the performance and fidelity of audio systems. The device supports a wide dynamic range and can capture audio signals from an impressive range of frequencies, ensuring accurate representations of even the most nuanced sounds.

The SR785 employs state-of-the-art Fast Fourier Transform (FFT) technology, enabling users to switch between time-domain and frequency-domain analysis with ease. This flexibility allows engineers to tailor their measurements based on specific requirements, whether they are evaluating distortion levels, frequency response, or impulse response. The instrument’s high-resolution display provides clear visual representations of the analyzed data, making it easier to identify trends and anomalies.

Another notable feature of the SR785 is its built-in automation capabilities. This technology allows for automated testing sequences, streamlining the analysis process and reducing the potential for human error. Users can pre-program a series of tests to run automatically, ensuring consistency in measurements and saving valuable time during testing and analysis.

Additionally, the SR785 offers extensive data storage options, allowing users to save measurement results for future reference or comparison. This is particularly beneficial for long-term studies or for manufacturers conducting quality control checks on production lines. The device is also equipped with a range of connectivity options, including USB and GPIB, facilitating easy integration into existing test setups and enhancing its versatility.

The combination of advanced features, robust technologies, and user-friendly design makes the SRS Labs SR785 a top choice for audio professionals seeking a reliable and efficient audio analysis solution. Whether for research, development, or quality assurance, the SR785 delivers precise and actionable insights that drive sound performance to new heights.
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