4-way DTMB engineering set-top box

DTMB wireless digital TV set-top box, supporting general functions such as EPG, CA, LOADER, etc.

1. Adopting EDTMB technology, single multi carrier full mode wireless reception provides a better viewing experience.

2. Simultaneously supports DTMB.

3.MPEG-2、AVS、AVS+、H.264There are four standard video decoding formats.

4. Equipped with universal digital TV functions such as EPG, CA, and loader.

5. Supports USB upgrade.

6. Supports UCAS (supporting all domestic CAS), and the same software can contain more than 4 types of CAS, which can be automatically recognized through front-end recognition words or smart cards.

7. The appearance is simple and fashionable, and the assembly is convenient, making it the best companion for televisions.

Performance characteristics

RF and Channel

RF input frequency: 42-870MHZ

Input impedance: 75 Ω

Input level: -10~-86dbm

Demodulation method: 16QAM, 32QAM, 64QAM

Channel bandwidth: 8M

Video output

Video format: MPEG-2 AVS AVS+H.264

Video output amplitude: 700 ± 30mv (p-p)

Video synchronization amplitude: 300 ± 30mv (p-p)

Physical interface: CVBS

AUDIO

Audio output level: ≥ -8 dbu

Audio distortion: ≤ 1.0 (20~20khz)

Audio amplitude frequency characteristics: ± 2 (20~20khz)

Input mode: left and right channels

Physical interface: CVBS

schematic diagram