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Help CenterDSM2500B Adjacent Frequency Agile Modulator
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Specifications
DSM2500B Adjacent Frequency Agile Modulator1 Applicable for 47~870MHz system
2 Specially designed for large scale system
DSM2500B Adjacent Frequency Agile Modulator
- Applicable for 47~870MHz system, agile channel output,specially designed for large
scale system .
- Man machien dialogue function - Vedio frequency AGC function - RS485 net administration function - I2 C Bus control - LCD Display:Radio frequency,Video/Audio medium frequency,Video frequency modulating
scale,Audio frequency modulating deviation,RF output level,A/V ratio,etc
- Audio noise reduction (optional) - Clamping and non-clamping switch,easy for Video frequency scrambler - Intermediate frequency modulating,Video/Audio medium frequency sgnal input,output
port can be applid for interference loading for fee-paid TV system
- In accordance to adjacent frequency design, no interference between adjacent channel
- Having RF automatic amplitude-stabilizing circuit, making front-end system becoming
more stable and reliable .
- RF output adopting modular amplification, ensuring RF output dynamic and parasite
suppressing
- Adopting unique diode dual-balance modulating, good linearity, low noise, modulator's
indexes, such as S/N, C/N, DG, DP, have achieved internationally advanced
level
- Surface mount technology, ensuring the accordance of entire machine - 19' 1U standard structure, independent power supply, elegant exterior design Specification: - RF: IF 38MHz/33.4MHzoutput return loss ≥15 dB (VHF) ≥ 12 dB (UHF) output level ≥ 120 dBμV (typical value) C/N ≥ 65 dB (fc ± 4 MHz) ≥ 70 dB (fc ± 8 MHz) ≥ 80 dB (fc ± 16 MHz) spurious output suppression ≥ 68 dB - Video: input level 1.0 Vp-p video modulating rate 87.5 % deferential gain ≤ 2 % deferential degree ≤ 2 ' video in-band flatness ≤ ± 0.75 dB video S/N ≥ 58 dB (non coefficient added) ≥ 64 dB (coefficient added) - Audio: audio deviation ± 50 KHz audio in-band flatness ≤ ± 0.5 dB(40Hz15KHz) audio distortion degree ≤ 1 % audio S/N ≥ 65 dB
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