Shortwave Broadcasting Transmitter

RF carrier output power: P ³ 50 kW; Type of emission: Amplitude Modulation (A3E); Operating frequency range: 3.2 MHz∼22MHz; RF synthesizer output: 3.000 30.000 MHz, frequency stability 2´10- 9 / day; Modulation subsystem: modulation mode-FCM (similar to Pulse Step Modulation),A3E (optional 9A3, 15A3.); Mode of tune: 11 level (100 KHz step) of frequency automatic pre-setup and memory, automatic follow and precision tune at any frequency within each step, typical time of tune 30 second; Output of transmitter: impedance 300W balanced, VSWR 2:1 maximum; Audio-frequency bandwidth: 40Hz 7500 Hz; Maximum amount of modulation: m = 100% for 50Hz 7500 Hz; Input of modulator: impedance 600/150W, balanced or unbalanced, ± 10dB(1kHz); Audio-frequency response deviation:± 1dB / 50Hz∼7500Hz (m=0. 5); Nonlinear distortion: ≤4 % / 60Hz∼5000Hz (m=0. 9); Interference level:better than 56 dB (1000Hz,m=1); Unbalance of modulation: £ 3%(1000Hz, m=0.95); RF residual radiation: less than 50 mW; Overall efficiency: h ³ 65%.