870 MHz CATV Analog Fixed Channel Modulator CATV Channel Modulator
Fixed Channel Modulator (DT-FCM-9902) fixed channel modulator is an economical headend equipment for the modulation of video and sound signals. It adopts the advanced modulation circuit and PLL (phase-locked loop) technique to ensure high frequency stability and good out-of-band rejection. It is widely used in the medium or small sized CATV system and the safety defence monitoring system.
★Features
⊙LED display,19″1U case.
⊙Operation bandwidth is 870MHz.
⊙With high quality SAW filter for slight jamming.
⊙Video modulation depth,audio modulation depth and RF output level are all modulated on front panel.
⊙Operation bandwidth is 870MHz.
⊙With high quality SAW filter for slight jamming.
⊙Video modulation depth,audio modulation depth and RF output level are all modulated on front panel.
★Specification
Items | Units | Specifications | ||
RF | ||||
Frequency range | MHz | 47~870 NTSC: CH2~158. PAL-B/G: E2~E12,E21~E69,S2~S41. PAL-D/K: DS1~DS56, Z1~Z42. | ||
Output level | dBµV | ≥110 | ||
Return loss | dB | ≥12 | ||
Vision carrier frequency deviation | KHz | ≤±5 | ||
Out-of-Band Output Rejection | dB | ≥62 | ||
Output level adjusting range | dB | 0 … -20 | ||
Video | ||||
Video S/N | dB | ≥50 | ||
Modulation depth | % | ≥87.5 | ||
In-band flatness | dB | ≤±1.5 | ||
Differential gain | % | ≤5 | ||
Differential phase | ° | ≤5 | ||
Chrominance luminance delay | ns | ≤45 | ||
Audio | ||||
Audio S/N | dB | ≥60 | ||
Audio distortion | % | ≤1 | ||
Audio modulation frequency-offset | KHz | ±50 | ||
Power | ||||
Power supply | V | AC220±10% | ||
Power consumption max. | W | 12 | ||
Physical | ||||
Dimension | mm | 483×130×44 | ||
Packing dimension | mm | 522×181×68 | ||
Gross weight | Kg | 2.2 | ||
Operating temperature | ºC | -25~+55 | ||
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Our advantages
* As a world class manufacturer we can ensure you are getting world class quality at a competitive price.
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