JM-4U 4 in 1 Multimod Agile Chanel Modulator

1. Technical Characteristics:

compact, easy installation; UHF , VHF agile modulator

microcomputer control, image Audio pairs of phase-locked;

channel frequency-agile modulator-type repeat;

51 programmable channels, can display channels;

We have power memory function, there is an excellent linearity of audio and video;

IF SAW filter treatment, vestigial sideband excellent;

high output, high reliability; Agile function

wide range of linear power supply;

the use of SMD technology, machine stability.

2. Technical parameters:

Output frequency range MHz 471-863

RF Output Level dBμV ≥ 104

Spurious output suppression ratio dB ≥ 60 (the RF output at maximum)

RF Output Return Loss dB ≥ 13

Video Modulation % 87.5 (video input level 1Vp-p)

Video-band flatness dB ± 1.2

Differential Gain %≤ 5

Differential Phase°≤ 5

Video signal to noise ratio dB≥ 60

Color / light time delay difference t ns | τ | ≤ 45

Images, Audio Frequency Pitch KHz 6500 ± 2 (PAL-D / K); 6000 ± 2 (PAL-D / I)

The accuracy of the image carrier frequency f KHz≤ 5

Audio Carrier Modulation Deviation KHz 50

Audio Total Harmonic Distortion % ≤ 1

Audio signal to noise ratio dB ≥ 60

Audio Pre-emphasisμs 50

Supply V AC 90 ~ 264 ± 10%

Temperature 5-50

Relative Humidity % ≤ 85

Atmospheric pressure working environment Kpa 86-106

Overall dimensions / Meas mm 483 * 140 * 45/550 * 175 * 80