The Spider-80X high channel measurement system provides users with the flexibiIlity to create a dynamic signal analysis solution according to their needs. Scalability, remote monitoring, and preloaded operations are all possible with Crystal Instruments’ DSA solutions.

Frequency Response Function (FRF)
The Spider-80X performs FRF analysis, a function which computes the structural response to steady-state osciliatory excitation. An important application of dynamic signal analysis is characterizing the input-output behavior of physical systems. With linear systems, the output can be predicted from a known input if the frequency response function of the system is known.

Octave Analysis and Sound Level Meters (SLM)
Both octave filter and sound level meters are implemented based on high precision real-time filters. FFT spectral analysis, octave analysis and sound level meter analysis can be executed at the same time.

Time Waveform Recording
In addition to saving spectral data, the Spider-80X has the ability to record time wave form data. Raw time wave form data from an array of different sensors is displayed and recorded at sampling rates of up to 102.4 kHz.

Automated Schedule and Limiting Test
Automated limit test function allows the Spider front-end to conduct automated limit checking for time or frequency signals. The function is supported in both PC tethered mode and Black Box mode. Limiting signals are designed using the EDM software on the host PC. There are four elements in a limiting test: signals being tested, upper or lower limits applied, testing schedule, and testing log.

Real-Time Digital Filters
Real-time digital filters are applied in the data conditioning phase. The user designs the filter model with a graphic design tool provided and uploads the filter design parameters to the front-end for real-time calculation. The graphic design tool draws the filter performance in vertical axis with dB unit and horizontal axis in relative frequency.

Shock Response Spectrum (SRS) Analysis
Compute the SRS for all channels using maxi-max, maximum negative, and maximum positive analysis techniques. A reference profile is available.

Order Tracking Analysis
Order Tracking is a general term describing a collection of measurement functions used for analyzing the dynamic behavior of rotating or reciprocating machinery for which the rotational speed can change over time. Unlike the power spectrum and other frequency-domain analysis functions where the independent variable is frequency, Order Tracking functions present the data against multiples (Orders) of the variable shaft running speed.


Sine Reduction
Sine Reduction test runs so that the Digital Signal Analyzer (DSA) is synchronized to a Vibration Control System (VCS). More processing channels are arranged on the Sine Reduction system, and work simultaneously with Sine Control. Two instruments are synchronized through controller’s COLA output signal. The COLA signal is a constant voltage sine wave which frequency tracks the Drive signal frequency of Sine Control test.