2004 Coherent Sampling Calculator (CSC) This calculator prov
|
|
|
Top Searches for this datasheet
BASESTATIONS WIRELESS INFRASTRUCTURE HIGH-SPEED SIGNAL PROCESSING
2004
Coherent Sampling Calculator (CSC)
This calculator provides quick easy select sinusoidal input test tones test analog-to-digital (ADC) converters. Based theory coherent sampling, calculator allows user chose input sampling frequencies well number integer cycles within sampling window resolution (number data point) FFT. When evaluating dynamic performance analog-to-digital converters (ADCs) using Fast Fourier Transforms (FFTs), must decide whether coherent sampling window sampling. Maxim's application note "Coherent Sampling Window Sampling" details advantages disadvantages each sampling technique, but, general, coherent sampling produces best quality high-resolution FFTs. purpose coherent sampling force integer number input cycles within sampling window. Figure shows several examples coherent sampling time domain.
Figure
Figure
Figure
Figure
Figure 1a-d. Coherently sampled data contains integer number cycles within sampling window. These figures show four sets coherently sampled data. Each data cycles within sampling window contains data points. NWINDOW=13, NRECORD=64 Mathematically, coherent sampling expressed
where:
input frequency under test. fSAMPLE sampling frequency under test. NWINDOW integer number cycles within sampling window. This value must prime number. NRECORD number data points used create your FFT. This value must power
Finding fSAMPLE that satisfy above relationship iterative process. Excel spreadsheet titled "Coherent Sampling Calculator" available download simplify process. Alternatively, simplified web-based version Coherent Sampling Calculator available. "Coherent Sampling Calculator" requires four input variables:
fDSAMPLE desired sampling frequency under test. fDIN desired input frequency under test. NRECORD number data points used create your FFTs. This value must power SIGFIG desired number significant figures after coherent sampling results.
From four variables listed above "Coherent Sampling Calculator" will provide coherent sampling frequency (fCSAMPLE) input frequency (fCIN). Coherent Sampling Calculator includes macro that allows user view detailed intermediate steps calculation process. default, spreadsheet hide these detailed calculations, however clicking "Show_Detailed_Calculations" button user additional information such size coherent sampling window (tCWINDOW) number input cycles coherent sampling window (NCWINDOW).
Figures show examples coherently sampled FFTs taken using coherent sampling calculator MAX1211EVKIT.
Figure Coherently sampled from MAX1211EVKIT. fCIN=20.0031266MHz fCSAMPLE=65.0002432MHz NCWINDOW=2521 NRECORD=8192
Figure Coherently sampled from MAX1211EVKIT. fCIN=32.1271954MHz fCSAMPLE=65.0002432MHz NCWINDOW=4049 NRECORD=8192
More Information MAX1180: QuickView Full (PDF) Data Sheet Free Samples MAX1181: QuickView Full (PDF) Data Sheet Free Samples MAX1182: QuickView Full (PDF) Data Sheet Free Samples MAX1183: QuickView Full (PDF) Data Sheet Free Samples MAX1184: QuickView Full (PDF) Data Sheet Free Samples MAX1185: QuickView Full (PDF) Data Sheet Free Samples MAX1186: QuickView Full (PDF) Data Sheet Free Samples MAX1190: QuickView Full (PDF) Data Sheet Free Samples MAX1191: QuickView Full (PDF) Data Sheet Free Samples
MAX1192: QuickView Full (PDF) Data Sheet Free Samples MAX1193: QuickView Full (PDF) Data Sheet Free Samples MAX1195: QuickView Full (PDF) Data Sheet Free Samples MAX1196: QuickView Full (PDF) Data Sheet Free Samples MAX1197: QuickView Full (PDF) Data Sheet Free Samples MAX1198: QuickView Full (PDF) Data Sheet Free Samples MAX1206: QuickView Full (PDF) Data Sheet Free Samples MAX1207: QuickView Full (PDF) Data Sheet Free Samples MAX1211: QuickView Full (PDF) Data Sheet Free Samples MAX1444: QuickView Full (PDF) Data Sheet Free Samples MAX1446: QuickView Full (PDF) Data Sheet Free Samples MAX1448: QuickView Full (PDF) Data Sheet Free Samples MAX1449: QuickView Full (PDF) Data Sheet Free Samples
Other recent searches
SBL530 - SBL530 SBL530 Datasheet
SBL560 - SBL560 SBL560 Datasheet
S1T8527C - S1T8527C S1T8527C Datasheet
REJ03D0520 - REJ03D0520 REJ03D0520 Datasheet
0100 - 0100 0100 Datasheet
CDLE-624-002 - CDLE-624-002 CDLE-624-002 Datasheet
2SD1325 - 2SD1325 2SD1325 Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
