Overview AM: RF amplifier, mixer, oscillator (with ALC), IF amplifier, detector, AGC, oscillator buffer, tuning indicator (narrow-band SD), IF buffer output, IF output for AM stereo • FM IF: IF amplifier, quadrature detector, band muting, tuning indicator, IF buffer output, S-meter • MPX: PLL stereo decoder, stereo indicator, forced mono, VCO stop function, adjacent channel interference rejection function (114 kHz), post-amplifier (with muting function) Features • Reduced number of adjustments (adjustment-free MPX VCO: ceramic resonator adopted) • Tuning indicator pin (Can be used as a narrow-band stop signal and as a muting output driver.) • Variable FM stop sensitivity and band • Variable AM stop sensitivity • Built-in AM local oscillator buffer • Variable AM low cut control
|