Encoder-Modulators
HDM-901C
HDMI/CVBS Encoder and DVB-C/T Modulator for CATV Distribution
Turn any HDMI or CVBS source into a broadcast-grade DVB-C or DVB-T channel on your existing coax network — encoding, multiplexing and modulation in one compact unit.
Overview
The VIZOBOX HDM-901C is an all-in-one encoder-modulator that converts an HDMI or FBAS/CVBS input with stereo audio into an adjacent DVB-C or DVB-T RF channel. It encodes video in MPEG-4 AVC/H.264 up to 1080p60 with MPEG-1 Layer 2 audio and delivers an adjustable RF output with integrated combiner for direct feed-in into CATV networks. Typical applications include information channels in hotels and public spaces, digital signage, CCTV distribution and feeding media players or PCs into DVB-C/T networks.
Highlights
- 1x HDMI or FBAS/CVBS input with stereo audio, CATV coax RF output
- MPEG-4 AVC/H.264 encoding up to 1080p60, MPEG-1 Layer 2 audio
- DVB-C QAM (16/64/128/256, 8 MHz) and DVB-T COFDM (6/7/8 MHz, FFT 2k/8k)
- High RF output level with 0–20 dB adjustable attenuation and integrated combiner
- Ideal for hotel info channels, digital signage, CCTV and media-player feed-in
- Compact unit with wall-mounting support
Technical Specifications
| Input | |
|---|---|
| Input | 1x HDMI or FBAS/CVBS + stereo audio |
| Video | |
| Video encoding | MPEG-4 AVC/H.264, max. 1080@60p |
| Input formats | PAL, NTSC; 720@50p/60p; 1080@50i/p, 1080@60i/p |
| Max. encoding bitrate | 25 Mbps |
| Audio | |
| Audio codecs | MPEG-1 Layer 2, AAC, 48 kHz |
| Output | |
| RF frequency range | 50...950 MHz |
| Output level | >100 dBµV, adjustable (0...20 dB) |
| Connector | F-female, internal combiner |
| Impedance | 75 Ω |
| DVB-C | |
| Modulation scheme | 16...256 QAM |
| Bandwidth | 8 MHz |
| Symbol rate | 5000...7000 kS/s (up to 9000) |
| MER | ≥35 dB (typ.) |
| Effective bit rate | ≤51.6 Mbps (SR=7 Mbaud, 256QAM) |
| Standard | ITU-T J.83 Annex A/C |
| DVB-T | |
| Constellation | QPSK, 16QAM, 64QAM |
| Code rate (FEC) | 1/2, 2/3, 3/4, 5/6, 7/8 |
| Guard interval | 1/4, 1/8, 1/16, 1/32 |
| FFT | 2k / 8k |
| Bandwidth | 6, 7, 8 MHz |
| General | |
| Supply voltage | 12...14 VDC |
| Power consumption | 12 W (12 V / 1 A) |
| Operating temperature | 0...+50 °C |
| Storage temperature | -25...+55 °C |
| Dimensions (H x W x D) | 35 x 175 x 135 mm |
| Weight | 400 g |
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