In SX Microcontrollers, SX/B Compiler and SX-Key Tool, markuster wrote: Thanks, I have made changes: Now , the pulse is longer than 10millisecond ( I am using more than 10 i.e 15, 20, etc. ) and I am using different modulation frequencies but I have the problem yet. Many thanks for you fast response and support. Any way if you have an other idea about how can I increase the range please help. Thanks, Mark ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=283893#m283903 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)