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1. The THS-8100 series of DTMB wireless digital TV set-top boxes are designed by Changsha Tonghui Electronic Technology Co., Ltd. to fully comply with the DTMB standard and comply with GB 20600-2006 "Digital TV Terrestrial Broadcast Transmission System Frame Structure, Channel Coding and Modulation" and H.264 "ISO/IEC 14496-10:2010"/ AVS "Advanced Audio and Video Coding in Information Technology Part 2: Video" (GB/T 20090.2) coding standard, in line with "Digital Video Broadcasting Chinese Service Information Specification JY/Z-174-2001 A brand-new DTMB wireless digital TV high-definition set-top box product required by the "Digital TV Broadcasting Electronic Program Guide Information Specification" and other requirements.
2. THS-8100 system products comply with national and industry standards related to household appliances, such as: "Safety of Information Technology Set-Top Boxes (including Electrical Business Set-Top Boxes)", "Grid-powered household and similar general-purpose electronics and related set-top boxes Safety Requirements, "Sound and TV Broadcast Receivers and Related Set-Top Box Radio Interference Characteristics Limits and Measurement Methods", "Information Technology Set-Top Box Radio Interference Limits and Measurement Methods", "General Specifications for Special Digital TV Receivers", "Special Measurement Methods of Digital TV Receivers, General Rules of Basic Environmental Test Procedures for Electrical and Electronic Products, etc.
3. The set-top box has passed the China Compulsory Certification (3C (China Compulsory Certification) certification) and the national energy efficiency label certification.
4. Product manufacturing has undergone strict quality control throughout the entire process from design, electronic component procurement, motherboard chip processing to complete machine assembly production, and strict testing and inspection before leaving the factory to ensure long-term stable and reliable operation of product equipment .
5. The product power supply adopts wide-voltage lightning protection design, the product stability is greatly improved, and user maintenance is more convenient.
6. The product's remote control adopts stainless steel pot piece design, which is waterproof and anti-drop, good in hand feeling and long service life.
7. The product has a variety of designs for users to choose from.
1. Hardware platform technical parameters
1 | CPU processor | Hi2318M, the highest frequency is 600MHz, in line with the DTMB-T standard, the frequency is above 600Mhz, and supports AVS+H.264MEPG2 decoding |
2 | Main chip | Hi2318M |
3 | Demodulation chip | Hi2318M built-in |
4 | Tuner tuning | Si2141（silicon labs） |
5 | FLASH memory | 4Mbytes |
6 | SDRAM | 256Mbits DDR2 (built in Hi2318M) |
7 | RF input interface | British F type |
8 | Video output interface | 1 CVBS composite signal, RCA interface |
9 | Audio output interface | 1 set of left and right channels (stereo), RCA interface, 600 Ω unbalanced |
10 | Video decoding | Support MPEG1/2/4 series, H.264, AVS, AVS+ |
11 | Audio decoding | Decoding of different audio formats such as MP3, WMA, DRA, etc. |
12 | Video mode | Support 25fps@D1(720X576) |
13 | USB interface | 1 way USB 2.0 interface |
14 | Power supply | Built-in power supply 220V/AC power supply or 5V/2A or 12V/1A |
15 | Display panel | 3-digit LED digital tube, 1 power indicator light, 1 signal lock light, 6 buttons |
2. Main technical indicators
1) RF input
Project | Parameter |
RF input frequency | 47-870MHz |
Input resistance | 75 Ω |
Minimum input level | UHF ≤25dBuV （Mode 7） |
VHF ≤24dBuV （Mode 7） | |
Maximum input level | ≥82dBuV |
Physical channel bandwidth | 8MHz |
Gaussian C/N threshold | 15.2dB （Mode 7） |
Rice C/N threshold | 16.1dB （Mode 7） |
Rayleigh C/N threshold | 20.1dB （Mode 7） |
Echo delay 30uS | 23 dB （Mode 7） |
Frequency capture range | ±150kHz |
Input reflection loss | ≥8dB（Test on the currently tuned channel of the RF tuner） |
Demodulation method | Adaptive 16, 32, 64, 256 QAM (basic requirements) |
Symbol rate | 3.6-6.952Mbaud（64QAM） |
2) Video output
Project | Parameter |
Video output amplitude | 683.4 mVp-p |
Video synchronization amplitude | 288.1 mVp-p |
Video frequency characteristics | -0.16 dB (≤4.8MHZ） |
-0.34dB (4.8~5MHZ） | |
-1.08 dB (≥5.5MHz) | |
Video signal-to-noise ratio (weighted) | 66.3dB |
Differential gain | 2.1% p-p |
Differential phase | 1.7% p-p |
Brightness non-linear | 2.2% |
Chroma/Luminance gain difference | 0.1% |
Chroma/luminance delay difference | 5.8ns |
K factor | 1.9% |
3) Audio output
Project | Parameter |
Audio output level | -0.8 dB |
Audio distortion | 0.13 % |
Audio frequency characteristics | 0.27dB |
Audio signal-to-noise ratio (no weight) | 76dB |
Audio left and right channel crosstalk | -77.5dB |
Audio left and right channel phase difference | 0.21dB |
Audio left and right channel level difference | 0.1dB |
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