Using a wideband receiver (as in the pager) to try to receive a narrow band signal ( new system) the audio will be weaker. You can try to modify the pagers to increase the audio going to the tone decode chip. Either changing a resistor or a trim pot might work to increase the audio going to the decode chip. Good luck.
Message: 3 Date: Sun, 26 May 2013 11:57:06 -0400 (EDT) From: kf8sj@aol.com Subject: Re: [chirp_users] Baofeng UV5R dtmf on receive/// To: chirp_users@intrepid.danplanet.com Message-ID: 8D02840CDE7FBBD-1F40-1901C@webmail-m165.sysops.aol.com Content-Type: text/plain; charset="us-ascii"
thanks. would appreciate any help possible. with the advent of narrow banding, all our pagers will not work. we are paged out by the sheriffs department over a public government channel using the dtmf codes. have already explored their sending either a different pl tone, or a dcs signal, but their system is not capable of doing either. for the price of a handfull of pagers, could equip the entire department with these units, and gain a talk around radio.
not sure what an Arduino sketch is
73 jim studer kf8sj