Averaging is used in data acquisitions to reduce the random noise presented in the signal channels. Traditional averaging is done in software with large volume of repetitive data. It takes considerable time to uploading and computing acquired data. The data acquisition efficiency decreases as the repetition number increases.
Euvis data acquisition modules are equipped with hardware accumulation engines, which utilizes hardware parallel processing capability and can highly reduce numerical computation time. Instead of uploading large volume of repeated captures, only the accumulated waveforms are transferred. In operations, incoming analog waveforms are repetitively digitized and stored in on-board memory. The data alignments are done with respect to the trigger signals. After specified repeats, multiple of repeatedly acquired data are accumulated in the on-board FPGA. The final accumulated digital waveforms can be uploaded to PC hosts.
Functional Specifications
Accumulated Waveform Resolution | 32 bits |
Maximum Average Number, NAVG(MAX) | 65,536 |
Maximum Data Length | 16,384 points |
Trigger Sensing Window | 4 ~ 28 point |
Waveform Acquisition Mode | Multiple-Burst |
Averaging Speed | 50% of ADC Sampling Rate |
MeasurmentS
The following time and frequency domain responses show the difference between un-averaged
and averaged captures. In the measurements, incoming signal is a sequence of 1024-point
sinc pulses
with additive PNS noise. The red-color responses are for a single captured waveform.
The averaged responses are in blue color and the average number, NAVG, is 10,000.
The following responses show 4096-point FFT comparison of chirping waveforms. The chirping waveforms are generated by AWG452 from 240 MHz to 360 MHz. PNS noise is combined with the chirping waveform as inputs of the AWG452. Received waveforms are captured by DAQ411 at 2400 MSPS.
To get pricing information and the complete datasheet, please e-mail: info@euvis.com.