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adjacent channel modulator

adjacent channel modulator

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الاتصال الآن
عضو مجاني

الشخص الذي يمكن الاتصال به Ms. jenny

peihua road,chengdu,sichuan,china, Chengdu, Sichuan

الاتصال الآن

Description

Outline

DSM***1A adjacent channel modulator is an enhanced TV modulator with the function of modulating audio and video signals into RF signal to output. As DSM***0A adjacent channel modulator, the DSM***1A modulator is also an advanced fixed channel output modulator applied for ****0 MHz large scale CATV system. Simultaneously, it has good performance in C/N, A/V, output level etc. Different from DSM***0A modulator, it has simple and different internal configuration so that it can leave out the modules and other components. Thereby, it can largely save the manufactures and operators cost.

Features

  • Applicable for ****0MHZ largescale system
  • Fixed channel output
  • LCD display: including RF frequency, A/V medium frequency, video modulating depth, audio frequency modulating deviation, RF output level
  • IF modulation: IF audio and IF video signals input
  • Applicable for scrambling payperuse CATV system
  • Designed according to the transmission requirement of adjacent frequency, no interferences between adjacent channels
  • With RF automatic amplitudestabilizing circuit so that the headend system can be more stable and reliable
  • Good in linearity and low in noise by adopting unique diode dualbalance modulation circuit
  • All indexes have reached to international advanced level, such as S/N, C/N, DG, DP
  • Manual technology to ensure the consistency of the entire machine
  • *9\' 1U standard  structure, independent power supply, elegant appearance

Specifications

RF

Frequency range 

*7~**0MHz fixed channel

TV format

PAL D/K or PAL B/G

Intermediate frequency (IF)

*8Mhz/*1.5Mhz or *8.9Mhz/*3.4 Mhz

Output Return  loss

≥*5dB(VHF)  ≥*2Db(UHF)

Output level

≥**5dBuV(typical)

Output level adjustable range

0~*6dB

Audio to video ratio (A/V )

8~*2dB

Frequency exactness

≤±5KHz

Total Frequency deviation

≤*0KHz

Error of video/audio carrier interval

≤±0.5KHz

Carrier to noise ratio (C/N)

≥*3dB (fc±4 MHz)

≥*0dB (fc±8 MHz)

≥*0dB (fc±*6MHz)

Output suppression

≥*5dB

Connector

FL*0

Video

Modulation depth

≥*7.5%

Input impedance

*5Ω

Input amplitude

1.0Vpp

Video flatness

≤±0.*5dB

Gain of differential coefficient

≤2%

Phase of differential coefficient

≤2°

K Factor

≤2%

Time delay difference of color/ light

≤*0ns

Signal to noise ratio

≥*6dB(unweighted)

≥*2dB(weighted)

Audio

Audio Preemphasis

*0us

Input impedance

≥*0KΩ( unbalanced)

Maximum frequency derivation

±*0KHz

Audio flatness

≤±0.5dB(*0Hz~*5KHz)

Audio distortion degree

≤1%

Signal to noise ratio

≥*5dB

Miscellaneous

Dimension

*4mm×**2mm×**0m

Power

AC**0V±*0%*0Hz*2VA

Send a direct inquiry to this supplier

إلى:

Ms. jenny < Chengdu Felichos Internacia Co,ltd. >

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