I am using the latest Sound and Vibration Measurement Suite in Signal Express. I have a Spectral Map step in my program, which includes a Color Map. I am recording an accelerometer's transient response to an impact, and want to see the time-dependent frequency intensity changes as a function of time, so a color map should be perfect. I have no problem recording the accelerometer's transient response in a time graph, and I also see the power spectrum in another graph. While the color map indeed shows various frequencies at different intensity levels, I don't see the intensity of any of the frequencies change over the course of the 200 ms that I'm recording, while the time graph clearly shows the decaying waveform. Why doesn't the color map show a decrease in intensity of the respective frequencies as time progresses through the transient? I have everything set up to display and record the first 200 ms of the impact. At the end of this period, the intensity should go to almost zero.
Please see the attached .seproj file to review the parameters I have set.
Also, with the same .seproj file, I will occassionally get a Buffer Overflow error. From this file, can you tell me what setting I need to change. But I need to make sure that all data both displayed and recorded, is for the 200 ms timeframe specified (10 ms before the trigger and 190 ms after). The ADC I'm using is an NI 9234 in a cDAQ-9172 chassis.
Thanks,
--Tim
