FIR Filtering & Response.vi

[gareth1983]

I'm looking at the LabView 8.5 example, FIR Filtering & Response but I do not understand a small portion.

Comparing tabs "one-waveform", "N-Waveforms, 1 filter" and "N-Waveforms, N-Filter", I realise there's a small difference between them.

For  "N-Waveforms, 1 filter" and "N-Waveforms, N-Filter", there's this INDEX thingy which I do not understand why it is there?I realise the waveform actually changes when I change the parameters. Alright, I would like to ask? How does the changing of these parameters actually affect the waveform? 

Does the index refers to the number of waveforms and/or filters for these cases?

[mikeporter]

The logic associated with the two tabs you mentioned actually generates more than 1 waveform. The indexer allows you to select which of the waverforms to analyze.

Mike...