On-Board Hardware Average/Accumulation

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.

Averaging Comparison

 

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.

Averaging Comparison
 

Averaging Comparison



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.

Averaging Comparison
 



To get pricing information and the complete datasheet, please e-mail: info@euvis.com.
3319 Old Conejo Rd., Newbury Park, CA 91320 | Tel: 805-583-9888 | Fax: 805-583-9889 | info@euvis.com