# What are taps ? how to set number of taps in filter? **URL:** \ **Category:** GNU Radio\ **Created:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/what-are-taps-how-to-set-number-of-taps-in-filter/190248 "2010-06-17T16:22:29Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![grc007](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/74df32/32.png) [@grc007](https://www.ruby-forum.com/u/grc007)\ **Post date:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/what-are-taps-how-to-set-number-of-taps-in-filter/190248/1 "2010-06-17T16:22:29Z")
Dear users, Can anyone explain me what taps (in filter) means ? Any examples should be great Particularly in GRC which number should I give taps in filter bank, FFT filter, filter delay,… ? Thanks a lot. – View this message in context: [http://old.nabble.com/what-are-taps---how-to-set-number-of-taps-in-filter---tp28876582p28876582.html](http://old.nabble.com/what-are-taps---how-to-set-number-of-taps-in-filter---tp28876582p28876582.html) Sent from the GnuRadio mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![grc007](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/74df32/32.png) [@grc007](https://www.ruby-forum.com/u/grc007)\ **Post date:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/what-are-taps-how-to-set-number-of-taps-in-filter/190248/2 "2010-06-17T16:22:40Z")
On Mon, Jun 14, 2010 at 12:26:30AM -0700, grc007 wrote: > Dear users, > Can anyone explain me what taps (in filter) means ? Any examples should be > great > Particularly in GRC which number should I give taps in filter bank, FFT > filter, filter delay,… ? > Thanks a lot. Hello anonymous user, the question you pose is very basic in nature; it suggests you don’t know lots about digital signal processing. While I would not want to declare this a character flaw, DSP is pretty much what GNU Radio does. So if you don’t know how digital filters work, it might be a better idea to have another look at some textbooks on the topic than to start programming away with GNU Radio. Perhaps this may help: [http://gnuradio.org/redmine/wiki/gnuradio/SuggestedReading](http://gnuradio.org/redmine/wiki/gnuradio/SuggestedReading) Good luck, Martin – Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin B. Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-3790 Fax: +49 721 608-6071 www.cel.kit.edu KIT – University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association