Active Member
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[China]
Contact name:
Chengdu Digitovision Co.,Ltd |
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Outline
1.Space saving,fixed channel modulator system
2.Consists of 16 individual,vertically mounted,fixed frequency modulators
The Modulator is a space saving,fixed channel modulator system.It consists of 16 individual,vertically mounted,fixed frequency modulators and an efficient switching type power supply module.It is designed for 19” rack mounting.
Each modulator is SAW filtered and is factory set to the desired channel and proper offset.Precise frequency is maintained with PLL circuitry.It offers excellent video performance and high reliability in 4U rack.
Features
1.Easy setup,Internal fans for cooling modulators
2.Only one RF output.No need combiner
3.Precise frequency control with PLL circuitry
4.Each modulator has its control panel
5.Also available in NTSC,all PAL configuration
Technical Parameter
| Frequency Range | 47~860MHz (Any one channel) |
| Output Level | ≥110dBμV |
| Output Level Adjustment Range | 0~-20dB (Variable) |
| Video to Audio Carrier | -10dB~-30dB adjustable |
| Output Impedance | 75Ω |
| Spurious Output Suppression | ≥60dB |
| Frequency Accuracy | ≤±5KHz (VHF) , ≤±10KHz (UHF) |
| Video Output Reflection | ≥12dB (VHF) ≥10dB (UHF) |
| Video Input Level | 1.0Vp-p (87.5% Modulation) |
| Video Input Impedance | 75Ω |
| Differential Gain | ≤5% (87.5% Modulation) |
| Differential Phase | ≤5°(87.5% Modulation) |
| C/L Delay | ≤45 ns |
| Flatness | ±1dB |
| Video Modulator Depth | 0~90% (Variable) |
| Video S/N | ≥55dB |
| Audio Input Level | 1Vp-p (±50KHz) |
| Audio Input Impedance | 600Ω |
| Audio S/N | ≥57dB |
| Audio Pre-weighted | 50μs |
| Power Supply | AC 220V±10% 50Hz±2Hz,50W |
| Working Temperature | 0~40°C |
| Dimensions | 19 Inch 4 U housing
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