The higher a radio tuner's sensitivity rating is, the less able that tuner is able to receive weak signals of transmission. A poor sensitivity rating for a tuner is generally rated at around 10 to 15 microvolts, which is expressed as uV. The tuner sensitivity for the Sansui T7 is rated at 1.8 uV.
The tuning range is the range of frequencies through which a radio tuner can scroll to pick up a transmission. On the AM channel band, the Sansui T7 offers an available frequency range of 535 kilohertz (kHz) to 1605 kHz. On the FM channel band, it can read frequencies from 88 megahertz (MHz) to 108 MHz.
Image rejection, also referred to as image frequency rejection, refers to a radio tuner's ability to block out signals neighboring the frequency into which the radio is tuned. The Sansui T7 has an image frequency rejection rating of better than 80 decibels (dB) at 98 MHz on the FM band, while on the AM band it's rated at better than 100 decibels per meter (dBm) at 1000 kHz.
A radio tuner's selectivity rating expresses how well the tuner can focus in on one frequency signal in order to produce clear sound without noise from neighboring channels. The FM band of the Sansui T7 has a frequency selectivity rating of better than 60 dB; the AM band has a rating of better than 30 dB.