Specifications

JM-4U is a space-saving qam modulator system, which is fixed by the four channel agile modulator composition.

 

JM-4U CATV Fixed Modulator (qam modulator)

 

 

 

Specifications:

 

 

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

Weight  2kg