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Home > Products > Analog TV Device

 

DSM2500B adjacent frequency agile modulator

R: V20150828-21-28 Data sheet  

 

Feature

  • Applicable for 47~870MHz system, agile channel output ,specially designed for large
    scale system .
  •   Man machine dialogue function
  •  Video 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 signal input ,output
    port can be applied 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

Frequency range 

47~870MHz Any channel

TV system

PAL D/K

Output Return  loss

≥15dB(VHF)  ≥12Db(UHF)

Output level

≥120dBuV(typical)

Output level adjustable range

0~16dB(0.5dB step )

Audio carrier power to video carrier power ratio

-8~-22dB(0.5dB step )

Total Frequency deviation

5KHz

Error of video/audio carrier interval

≤±0.5KHz

Carrier to noise ratio (C/N)

≥62dB

Output suppression

≥60dB

Interface

FL10

Video

Degree of modulation signal

≥87.5%

Flatness is operating band

≤±0.75dB

Gain of differential coefficient

2%

Phase of differential coefficient

K-2T Factor

3%

Delay difference of color or light

30ns

Signal to noise ratio

≥56dB(unweighted)

≥62dB(weighted)

Audio

Pre-emphasis of audio

50us

Maximum partial frequency of audio

±50KHz

Audio flatness

≤±0.5dB(40Hz~15KHz)

Distortion degree of audio

1%

Signal to noise ratio

≥6dB

Communication interface

Interface

RJ45

Communication format

RS485

Date rate

9600bits/s

Miscellaneous

Dimension

44mm×482mm×360m

Power

AC220V±10%50Hz20VA

    

    

  

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