Windaq Add-ons

UltimaWaterfall

XChart

FFT1024

Lessons

Fast Fourier Transform (FFT) II (ID=70017)

This Windaq add-on is the second generation of Windaq Add-on FFT based on a more powerful commercial FFT module. It provides real-time FFT power spectrum for DATAQ's WinDaq  acquisition software, with multiple FFT sizes and higher resolution (see below)

If you can't see the video above, please click this YouTube link directly

Hightlights

1. Multiple FFT sizes: 1024, 2048, 4096,  8192, 16384 and 32768
   • Due to Windaq's memory allocation approach, the following rule should be observed if you wish to use this add-on 
     • For FFT size of 1024, up to 58 channels can be enabled in Windaq
     • For FFT size of 2048, up to 29 channels can be enabled in Windaq
     • For FFT size of 4096, up to 15 channels can be enabled in Windaq
     • For FFT size of 8192, up to 7 channels can be enabled in Windaq
     • For FFT size of 16384, up to 3 channels can be enabled in Windaq
     • For FFT size of 32768, only 1 channel can be enabled in Windaq (This is for registered user only)
2. True full ADC resolution (see side-by-side comparison below) No more need for the Dynamic Amplifier option available in the first generation of FFT
3. Multiple FFT windows for different channels under Windaq
4. Single click on AutoSet button will adjust the scale to bring a weak signal into sight immediately
5. The display of FFT II is sizable
6. Channel number is a 0-based index to Windaq's scanlist. For example, if Windaq has channel 3,4,6,7 enabled, one can enter 0 for channel 3, 1 for channel 4, 2 for channel 6 and 3 for channel 7.
7. Analog oscilloscope-like persistence control helps to study the trend of the spectrum (Refer to the above screen shot for visual effect)
8. While acquiring spectrum, you may use the mouse  to drag the waveform up and down, or double-click the buttons to change the scaling of the waveform. 
9. Once you stop the live frequency display, you may click on the chart to enable a cursor and drag it around to study the spectrum
10. Intelligent Channel Select: Highlight/Select a channel in Windaq and fire up this Windaq add-on, and it will use the selected channel as its default channel

Side-by-side comparison of FFT II and FFT (the signal is totally buried in the noise under the orginal version of FFT)

Bonus for users with paid registration :

• CopyToClipboard button provides quick access to a copy of the waveform
• No restriction on Window and FFT size 
• No ad-line in the charts
• No run time limit