Product category:
Testing, analysing and monitoring equipment
News Release from: TTi (Thurlby Thandar Instruments) | Subject: SR760 signal analyser
Edited by the Engineeringtalk Editorial
Team on 03 April 2001
FFT signal analyser with 100 kHz
bandwidth
The SR760 signal analyser, now available in the UK from TTi (Thurlby Thandar Instruments), is an FFT spectrum analyser with a dynamic range of 90dB and a real-time bandwidth of 100 kHz.
The SR760 signal analyser, now available in the UK from TTi (Thurlby Thandar Instruments), is an FFT spectrum analyser with a dynamic range of 90 dB and a real-time bandwidth of 100 kHz The speed and dynamic range of this instrument, coupled with its flexibility and many analysis modes, make it the ideal choice for a variety of applications including acoustics, vibration noise measurement and general electronics use
This article was originally published on Engineeringtalk on 5 Mar 2001 at 8.00am (UK)
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The true dynamic range of 90 dB means that for a full-scale input signal the instrument has no spurious responses larger than -90 dBc (one part in 30,000).
Even signals as small as -114 dBc (one part in 500,000) may be observed by using averaging.
The SR760 uses a pair of high-speed 24-bit digital signal processors (DSPs) to filter, heterodyne and transform sampled data from its 16-bit analogue to digital convertor.
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These DSPs can perform 25 million 24-bit multiplications and additions each second.
This enormous computing capability allows the analysers to operate at a real-time bandwidth of 100 kHz.
The power of the SR760 does not come at the expense of ease of use.
A simple menu-oriented interface logically groups related instrument functions.
Context-sensitive help is available for all keys and menus.
Entire instrument set-ups can be saved to disk and recalled in a single keystroke.
The spectrum, power spectral density and input time record can be displayed in a variety of convenient linear and logarithmic units, including volts, RMS voltage, dBV, dBVrms or user-defined engineering units.
The magnitude, phase and real and imaginary parts of complex signals can all be displayed.
Several window functions including Hanning, flat-top, uniform or Blackman-Harris can be chosen to optimise in-band amplitude accuracy or minimise out-of-band sidelobes.
The SR760 also computes both the 15 and 30 band 1/3 octave commonly used in acoustics and noise measurement applications.
A-weighting compensation is available for octave measurements.
Data tables allow up to 200 selected frequencies to be displayed in a tabular format, which can be printed out or saved to disk.
Convenient limit tables allow the entry of up to 100 separate upper or lower limit segments for pass-fail testing.
Three built-in analysis modes simplify common measurements.
Harmonic analysis computes both harmonic power and THD (total harmonic distortion) relative to a specified fundamental.
Sideband analysis computes power in a set of sidebands relative to the carrier power, and band analysis integrates the power in a selected frequency band.
All functions of the analyser can be queried and set via the standard RS-232 and GPIB interfaces.
The SR760 costs ?4680.00 (plus VAT).
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