# Where I can search for sample files **URL:** \ **Category:** GNU Radio\ **Created:** [February 6, 2015, 7:49pm UTC](https://www.ruby-forum.com/t/where-i-can-search-for-sample-files/234112 "2015-02-06T19:49:49Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [February 6, 2015, 7:49pm UTC](https://www.ruby-forum.com/t/where-i-can-search-for-sample-files/234112/1 "2015-02-06T19:49:49Z")
Hello,I’ve only a TV tuner E4000 for have fun with gnuradio…unlucky its sample rate is less than 3MSPS…I want to have fun with application more compute intensive, in order to see better bottlenecks and latencies…Could you tell me where I can find(if they exist) files with sample of 802.11 transmission, or other heavy application? Thank you,marco ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [February 6, 2015, 8:07pm UTC](https://www.ruby-forum.com/t/where-i-can-search-for-sample-files/234112/2 "2015-02-06T20:07:13Z")
Hello Marco, rest assured that with 3MS/s you can bring a fully fledged workstation to a constant boil, if you just do the wrong things on it. For example: you might want to receive ham radio. Ham radio often needs to squeeze the best SNR out of your signal; that usually requires great filters. Now, the better (read: steeper) your FIR filter is, the longer it gets [1], so try doing a 200Hz transition width low pass on a 2MHz nyquist band (hint: it get’s ugly. Without multirate filters, that would easily be 133GFlop/s [ripple=1e-3=delta\_stopband]). Now, we all love gr-ieee802-11, so why not point [2] you at it? Greetings, Marcus [1] N\_filt ~= 2/3 log10(1/(10_ripple\_passband_delta\_stopband)) \* f\_nyquist/f\_transition