the sirius xm channel, carried on channel 148 on xm (where it was on channel 164) and sirius (where it was on channel 118), is hosted by greg bell, who had previous radio experience as a program director, news director, sports director, anchor, and reporter. shows are played in two-hour blocks of programming which are rotated in different time slots during the week. this allows the audience in various time zones to be able to hear a show at convenient times. commercials and sirius xm promos are played before, after and during the old radio shows, though the amount of advertising time does not exceed eight minutes per hour. occasionally, the original vintage commercials are broadcast, though the majority of the spots are modern commercials provided by sirius xm and/or their sponsors.