JM-860 is a space-saving fixed catv headend system, which is fixed by the four channel digital modulator composition.

 

JM-860 catv headend  

 

First, technical characteristics:

compact size, easy installation;

microcomputer control, image sound two-phase locking;

IF SAW filter treatment, VSB gifted;

high output, high reliability;

wide range of linear power supply;

use of SMD technology, machine stability.

Second, technical parameters:

Output frequency range MHz 48-607

RF output level dBμV ≥ 105

Parasitic output rejection ratio dB ≥ 60 (maximum output frequency)

RF Output Return Loss dB ≥ 13

87.5% video modulation (video input level 1Vp-p)

Video-band flatness dB ± 1.2

Differential gain% ≤ 3

Differential Phase ° ≤ 3

Video signal to noise ratio dB ≥ 60

Color / bad light delay t ns | τ | ≤ 45

Images, sound frequency spacing KHz 6500 ± 2 (PAL-D / K); 6000 ± 2 (PAL-D / I)

Image carrier frequency accuracy of f KHz ≤ 5  

Audio Frequency Modulation KHz 50

Audio Total Harmonic Distortion% ≤ 1

Audio signal to noise ratio dB ≥ 60

Audio pre-emphasis μs 50

Power supply V AC 90 ~ 264 ± 10%

Ambient temperature 5-50

Relative Humidity% ≤ 85

Working environment at atmospheric pressure Kpa 86-106

Overall dimensions mm 483 * 140 * 45

For more detailed information,please contact us. Thank you!

 

JM-860 TV Modulator; CATV Headend