Title :
Passive intermodulation (PIM) in broadcast transmission systems-lessons learned and a look into the future
Author_Institution :
Greg Best Consulting Inc., Kansas City, MO, USA
Abstract :
Passive Intermodulation (PIM) occurring in worldwide broadcast systems has only received a very small amount of attention. This paper will focus on how and where PIM occurs in broadcast systems. Known PIM sources occurring in broadcast equipment are reviewed. PIM interference examples are provided for an ATSC DTV transmitter interfering with adjacent channel receivers. Both “static” and “dynamic” PIM categories with example levels are discussed. PIM research and lessons from the cellular industry are applied to broadcast components. Further research and areas to be investigated are suggested for future development.
Keywords :
broadcast communication; cellular radio; digital television; intermodulation; radiofrequency interference; television receivers; television transmitters; ATSC DTV transmitter; PIM interference; PIM sources; adjacent channel receivers; broadcast equipment; broadcast transmission systems; cellular industry; dynamic PIM category; passive intermodulation; static PIM category; Digital TV; Interference; Power transmission lines; Receiving antennas; Transmission line antennas; Transmitters; D/U ratio; Intermodulation; diode effect; harmonics; noise-like spectrum; receivers; transfer function; transmitting antenna;
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2014 IEEE International Symposium on
Conference_Location :
Beijing
DOI :
10.1109/BMSB.2014.6873574
