750M Adjacent Channel Modulator (China Manufacturer) - Radio TV Equipment - News Media Products

750M Adjacent Channel Modulator

Model:	-
Brand:	-
Origin:	Made In China
Category:	Services / News Media / Radio TV Equipment
Label:	Adjacent Channel , Channel Modulator , Modulator
Price:	US $180 / pc
Min. Order:	5 pc

Feature

Digital display of output channel.
Designed by adjacent channel transmission standard, no interference between adjacent channels;Input and output of Video/Audio intermediate frequency signal used for scrambling subscription CATV system.
Oscillator using unique phase-lock (PLL) circuit makes phase noise extremely low, makes video clear and stable, creates auto amplitude-fixed RF circuit and causes head-end system stable and reliable.
Using dual-balancing diode modulation with fine linearity and low noise, fine indexes including signal to noise ratio (S/N), carrier noise rate (C/N), differential gain (DG) and differential phase (DP) as good as those of import slap-up modulators.
19-inch standard structure, independent power supply, flexible fit out, elegant appearance, firm structure, nice electromagnetism shield and convenient operation and maintenance.

Specifications

Video input amplitude	1Vp-p (whole TV signal , positive)
Video input impedance	75W (lotus flower plug seat)
Audio input amplitude	0.775V
Audio input impedance	10KW (Imbalance lotus flower plug seat)
Degree of video modulation signal	≥87.5%
Video flatness	≤±0.75dB
Phase of differential coefficient	≤2º
Gain of differential coefficient	≤2%
Delay difference of color or light	≤35ns
Video signal to noise ratio	≥58dB (unweighted)
Video signal to noise ratio	≥64dB (weighted)
Output frequency	45～860MHz
Frequency accuracy	≤1KHz (VHF) ≤2KHz (UHF)
Total frequency deviation	≤5KHz (VHF) ≤10KHz (UHF)
Output level of video carrier	≥115dBmV
Adjusting range of output level	0～15dB
Audio carrier power to video carrier power ratio	–10～–20dB
Carrier to noise ratio (C/N)	≥65dB (fc±4MHz) ≥70dB (fc±8MHz) ≥80dB (fc±16MHz)
RF output impedance	75W
Output suppression	≥65dB
Error of video/audio carrier interval	≤±0.5KHz
Maximal partial frequency of audio	±50KHz
Pre-emphasis of audio	50ms
Audio flatness (40Hz～15KHz)	≤±0.5dB
Distortion degree of audio	≤1%
Audio signal to noise ratio	≥60dB
Carrier to inter-modulation ratio	≥60dB
Output return loss	≥14dB (VHF) ≥12dB (UHF)
Power supply	220V AC±10% 50Hz 20VA
Dimension	19² standard structure
Fixing dimension	465×31.8mm