Adjacent Frequency Agile Modulator (CATV Headend)

CATVHeadend, Adjcent Frequency Agile Modulator Specifications: 1) Video input amplitude: 1Vp-p (whole TV signal, positive) 2) Video input impedance: 75W (lotus flower plug seat) 3) Audio input amplitude: 0.775V 4) Audio input impedance: 10kW (imbalance lotus flower plug seat) 5) Degree of video modulation signal: ≥87.5% 6) Video flatness: ≤75dB 7) Phase of differential coefficient: ≤2 8) Gain of differential coefficient: ≤2% 9) Delay difference of color or light: &le30ns 10) Video signal to noise ratio: ≥58dB (unweighted); &ge64dB (weighted) 11) Output frequency: 45870MHz 12) Frequency accuracy: ≤1kHz 13) Total frequency deviation: ≤5kHz 14) Output level of video carrier: ≥120dBmV 15) Adjusting range of output level: 015dB 16) Audio carrier power to video carrier power ratio: negative 10negative 20dB . 17) Carrier to noise ratio (C/N): ≥65dB (fc MHz); ≥70dB (fc MHz); ≥80dB (fc 6MHz) 18) RF output impedance: 75W 19) Output suppression: ≥65dB 20) Error of video / audio carrier interval: ≤5kHz 21) Maximum partial frequency of audio: 0kHz 22) Pre-emphasis of audio: 50ms 23) Audio flatness (40Hz - 15KHz): ≤5dB 24) Distortion degree of audio: ≤1% 25) Audio signal to noise ratio: ≥60dB 26) Carrier to inter-modulation ratio: ≥60dB 27) Output Return loss: ≥15dB (VHF); ≥12dB (UHF) 28) Power supply: 220V AC10% 50Hz 20VA 29) Dimensions: 19" standard structure 30) Fixing dimensions: 465 1.8mm ====================================================================