KUSC-FM, a Los Angeles classical station licensed to the University of Southern California, is bragging that it is the top rated public radio station in the country, according to Arbitron. Normally that’s a crown that KQED or New York’s WNYC wears. It may be one more upset caused by Arbitron’s switch from diaries to Portable People Meters. During the spring quarter (April 2-June 24) for listeners 6 and older:

• KUSC, 737,000 listeners per week

• WNYC, 721,500

• KQED, 704,300