Subj : Ham Radio Glossary (O) To : All From : Daryl Stout Date : Fri Aug 16 2019 12:02 am From QRZ.Com, the Icom handout, and Part 97 Of The FCC Rules - Ham Radio Glossary - An overview of amateur radio terms. Offset frequency Frequency difference between transmit and receive. OM "Old Man"; affectionate way to address a fellow ham operator, like saying "Old Buddy!" OO "Official Observer"; a volunteer of the ARRL's Official Observer program who monitors the airwaves for FCC rules violations. For more information, please see http://www.arrl.org. OSC Oscillator --- SBBSecho 3.08-Win32 * Origin: The Thunderbolt BBS - tbolt.synchro.net (801:1/2) þ Synchronet þ Temple of Doom BBS - tod.eothnet.com .