400FM professional four-channel fixed channel frequency divider modulator
Introduction: The four-way TV modulator is suitable for hotels, hotels, hospitals, factory dormitories, cable TV front-end engineering installations, and affordable, to minimize the cost of cable TV viewing for owners. Features: 1. Four-channel video and audio channel input, one channel RF four channel frequency output. 2. High-frequency modulation, primary frequency conversion method and acoustic surface filter processing are adopted, and the out-of-band interference is small. 3, sound, image high IF and RF local oscillator are MCU phase-locked technology, frequency stability and accuracy are high. 4. The whole function circuit of the whole machine adopts the chip process, and the whole machine has high reliability. 5, convenient operation, volume and video modulation can be adjusted on the front panel. 6 Different styles can be customized according to customer requirements. Technical Parameters: A. RF performance: 1. Output frequency range 47MH~860MHz Any four frequency channels are available 2, frequency accuracy ± 5kHz 3, the output level 95dBuV 4, out of band suppression ≥ 60dB 5, the output impedance 75W 6, output reflection 12dB min any channel 7, sound - image carrier ratio 18 ± 2dB B. Video performance: 1, input level 0.6 ~ 1.5Vp-p 2, video input impedance 75W 3, video input reflection 30dB min 4, signal to noise ratio (weighted) 60dB 5, delay 45nsec 6, in-band flatness ±1dB 7. Differential gain ±5% (modulation degree is 87.5%) 8, differential phase ± 5 ° (modulation degree is 87.5%) C. Audio: 1. Input level -10 ~ 10dBm 2. Input impedance 10KW min 3, in-band flatness ±1dB 4, distortion 1% 5, signal to noise ratio -60dB 6, image, sound spacing according to the system D. power supply: 1, input AC voltage 110~245V 2, power consumption 15Wmax E. Physical parameters: 1, size 440mm long ́126mm wide ́44mm high 2, weight up to 2kg
