Hi. Just got this scanner ( I'm new to scanning ) and doing a custom scan of the frequencies 25mhz to 1.3ghz . So far I can't pick anything up apart from fmb. The scanner had stopped during a full scan about 11 times but all I get is white noise or beeping. Are these active frequencies that the scanner is picking up but are too faint for me to hear anything ? Do I need to buy a better antenna. Im currently using the supplied one. Thanks.