860mhz fixed modulator SFT21

fixed modulator SFT21 Summary: SFT21 is used as CATV 860MHz broad casting fixed channel modulator. As STM mounting technology is applied to its circuit, this product features small size, and high frequency. The circuit is designed with independent power supply, so it enjoys good heat spreading and 50Hz screening characteristic. It adopts SAW part that features excellent sideband characteristic for IF circuit, single chip controlled PLL for stable frequency circuit, and modularized amplification for amplifying circuit. Therefore the complete circuit combination is very excellent. It is the first choice headend equipment for large-sized TV station. Features: IF input/output interface. CPU controlled double PLL. SMT technology. Independent modularized amplifying circuit. Parameters: ItemUnitParameterRF ParameterOutput FrequencyMHz48.25 750Max Output LeveldBμV113V/A Carrier Power RatiodB10 30Spurious RejectiondBnv60Freq AccuracyKHz≤5Video ParameterVideo Mod Depth%87.5Freq Response WithindB≤2Differential Gain%≤5Sifferential Phaseº≤5C/L Delayns≤40Video S/N≥48Audio ParameterAudio DevKHz±50Audio Freq ResponsedB≤1.5Audio S/NdB≥54General PerformancePower SupplyV220±10%Temperature Range0 40