47~550MHz Combined Fixed Channel Modulator Introduction It is one combined fixed channel modulators unit that is developed according to space-saving, durable, and high performance design principle. It is composed of 12 modulators, and one highly efficient switching power supply that are all vertically installed in one 3U sized standard rack. For each modulator, concentrated power supply, and internal mixing mode are applied to allow system debugging simple and reliable. The 3U sized standard rack can either be installed on 19-inch cabinet, or is flexible to apply wall-hanging mode. Each modulator''''''''s channel is displayed by LED serial number. You will easily find the channel number by checking the Serial Number and Channel Number Reference Table on the panel. Features IF processed, double PLL circuit. 5V power supply circuit enables operation at mildly warm status. The switching power supply adopted is applicable to voltage 100~280V. Equipped with built-in mixer, no need to install additional mixer. Specifications Item Unit Specifications RF Output Frequency MHz 45~550 Max Output Level dB 100 RF Output Range dB 20 V/A Carrier Power Ratio dB -10~-30 Frequency Accuracy KHz ≤3.8 Spurious Rejection dB 65 Out-of-Band Noise dB -98 Video Video Mod Depth % 87.5% Frequency Response Within dB ? Video S/N dB 62 Differential Gain % ≤9 Differential Phase ?≤9 C/L Delay nsec ≤75 Audio Audio IF MHz 200mV(25KHz Dev) Input Impedance Ω 100Kohm(uneven) Audio Freq Response dB ?(each 15KHz for 50MHz) Audio Dev KHz 1% Maximum Audio S/N dB 75 General Power Supply V 220VAC?0%,50Hz,50W) Temperature Range ℃ 0~40 Dimensions cm 500?85?63 Weight KG 11.4