860MHz Para-Broadcasting Fixed Channel Modulator Introduction It is fixed channel modulator designed according to the principle of durability, simplicity, and high performance-price ratio. With its IF modulation circuit, video and audio carrier controlled by CPU PLL, It ensures frequency accuracy and stability. Equipped with proprietary SAW filter that can give real vestigial sideband response characteristic, its spurious rejection is over 60dB. Installed with single pass amplifier, its maximum output level is up to 117dB. Therefore it is applicable to large and medium sized headend system. It is one synthesized SAW filtered, spiral channel filtered high performance para-broadcasting fixed channel modulator. The product is made and tested completely in accordance with or even better than the parameters recommended by FCC. It is applicable to all the CATV channels, from standard channel 1 to standard channel 57 (47~866.25MHz). Features The high quality, high performance SAW enables extraordinarily excellent sideband characteristic. With CPU controlled PLL technology, it enjoys high frequency accuracy. With unique RF power amplifier, its output level is up to 117dB. Video modulation depth, audio deviation, A/V ratio, RF level are all adjustable on front panel. Specifications Item Unit Specifications RF Output Channels MHz 47~860 Output Level dB(maximum) 117 RF Output Range dB(adjustable) 20 V/A Ratio dB -10~-30 Visual Carrier Stability KHz ≤3.8 Aural Carrier Stability KHz ? Spurious Output dBc -62 C/N Ratio dB 68 Out-of-Band Noise dBc -98 Video Min. Video Input Vp-p(87.5%modulation depth) 0.5 Frequency Response dB ? Video S/N dB ≥55 Differential Gain % ≤5 Differential Phase ?≤5 C/L Delay ns ≤25 Audio Input Level mv(25KHz) 200 Input Impedance KΩ 10 Frequency Response dB(50Hz~15KHz ? Pre-emphasis usec 75 General Power Supply V 220?0% Temperature Range ℃ 0~40 Dimensions cm 48.3?6.5?.5