The author is in Japan and writes in Janpanese-English. What Jerri is trying to say, is that an antenna for 800mhz will work better than the push on antenna that Uniden includes with its scanners. If you have a Radio Shack nearby, get a right angle bnc adapter and a 800mhz antenna for the radio.
What I was trying to say, is that on the OKC system, most of the FD and PD are not able to be heard on any scanner made. The 15 will not decode the digital format of the ProVoice system. No scanner will. Now, whatever TalkGroup ID is 'A'nalog, you will be able to hear. 'D'igital and 'E'ncrypted, you will not be able to hear. If you look at the system where the frequencies are, you willl notice that preceeding the frequency is a number: 01 866.XXX, 02 866.XXX. Jerri can help you with how to put EDACS frequencies in a BC15. Whatever else, milair and conventional that you might want to monitor, will need an antenna that is made for those frequencies. A ham radio dualband antenna (140mhz and 440mhz combined together) will work adequately for flatland like where you live. The best place to find all that there is to hear in your area is the Oklahoma forum further down the page from this forum.
HTH,
Larry