that the output falls by 10 dB. Pin 15 1 MHz, 74 dBµ, fm = 1 kHz, 30% modulation 1 MHz, 74 dBµ, fm = 1 kHz, 80% modulation No input 1 MHz, 130 dBµ, unmodulated No input, the pin 15 output 1.4 MHz, the input when V48 = 0.7 V 1.4 MHz, the input when V48 = 0.7 V (seek mode) 1 MHz, the ANT input level such that the IF counter output turns on. 1 MHz, the ANT input level such that the SD pin.