All mode capability Radio signals are transmitted in a variety of modes. You can be sure that if there are any communications or broadcasts out there, you’ll be able to hear them with minimum interference from other signals. The IC-R8500 covers a wide frequency range continuously from 0.1 to 2000 MHz, * with 10 Hz resolution, while maintaining a high receive sensitivity. Other serial numbers (Not listed below) IC-R8500: IC-R8600: COMMUNICATIONS RECEIVER: IC-R8600. To read year of manufacture by looking at the serial. 2011 Serial Number Guide shows serial number and year of manufacture on more than 1900 Caterpillar serial.Is there any way to determine the actual manufacturing date or year by the serial number?. The IC-R8500 has superior receive sensitivity over its entire.