HDMI CVBS Encoder -> DVB-C/T Modulator
HDM-901C-T HDMI CVBS Encoder DVB-C T Modulator
- Input: 1x HDMI or FBAS/CVBS + Stereo
- Output: CATV Coax RF signal
- MPEG4 AVC/H.264 Encoder up to 1080p60
- Audio encoding MPEG1 Layer2
- Nominal RF Output power max. 94dBµV,
Range: 1…899MHz but practically > FM range use 113MHz for the lowest Center Frequency depending on Country and CATV ranges of the receivers (TV) - 0…20dB adjustable attenuation, integrated combiner
- DVB-C QAM: 8MHz, Symbol Rate up to 9000 16, 64, 128, 256QAM modulation modes
- DVB-T COFDM: 6,7, 8MHz max. 1/32 GI, FFT 2k/8k
- Information channels in Hotels or public spaces by Coax
- Applications like CCTV, Media-Player, PC, … to DVB-C/T
- Wall mounting support
A compact agile HDMI A/V encoder with DVB-C/T compliant QAM /COFDM one channel modulator with selectable CVBS or HDMI Full-HD Input. Easy configuration
BLANKOM HDM-901C /T
DVB-C/T compliant HDMI to QAM/COFDM Modulator as add-on Channel to existing CATV networks or serving Information-Channels or Digital Signage by Cable-TV.
Full HD h.264 compatible in Distribution of SD, HD TV channels through the existing CATV Coax network using state-of-art CVBS or HDMI to QAM DVB-C or DVB-T technology from almost any kind of video format inputs up to 1080p60.
TV distributions in home entertainment, surveillance control, hotels, digital signage, shops, bars, etc.
Excellent Video and Audio quality. High reliability.
No regular service and maintenance needed during operation. Settings stored in EEPROM.
Technical Specifications
(subject to changes w/o further notice)
| Parameter | Symbol | Description | Unit | Remark |
| Mechanical dimensions | ||||
| Height | H | 35 | mm | Weight 400g |
| Width | W | 175 | mm | |
| Depth | D | 135 | mm | |
| HDMI IN | ||||
| SD | HD | Max encoding bitrate 25Mbps | ||
| Input format encoding | PAL,NTSC | 720@50p,720@60p 1080@SOi/p,1080@60i/p |
Output — RF channel h.264 max. 1080@60p |
|
| Audio codecs | MPEG-1 Layer2, AAC | 48kHz | ||
| RF IN- & Output | ||||
| Impedance | – | 75 | 0 | |
| Connector | F-female | Internal combiner | ||
| Frequency | 50…950 | MHz | ||
| Output level | >100 | dBpV | Adjustable (0…20dB) | |
| Modulation Specification DVB-C Annex A/C | ||||
| Modulation scheme | – | 16…256 | QAM | |
| Bandwidth | BW | 8 | MHz | |
| MER | – | a5 | dB | Typ. |
| Symbol Rate | SR | 5000…7000 | kS/s | (up to 9000) |
| Effective bit rate | – | 552. | Mbps | SR=7Mbaud, 256QAM |
| Standard: | ITU-T J.83A/C | |||
| Modulation Specification DVB-T COFDM | ||||
| Code Rate | FEC | 1/2, 2/3, 3/4, 5/6, 7/8 | ||
| Bandwidth | BW | 6, 7, 8 | MHz | |
| Constellation | QPSK, 16QAM, 64QAM | |||
| Guard Interval | 1/4, 1/8, 1/16, 1/32 | |||
| FFT | 2k/8k | |||
| Parameter | Symbol | Min. | Max* | Unit |
| Supply Voltage | V | 12 | 14 | VDC |
| Supply Frequency | F | 49 | 51 | Hz |
| Power Consumption | C | 12 (12V/1A) | W | |
| Operating Temperature | Tw | 0 | +50 | °C |
| Storage Temperature | Ts | -25 | +55 | °C |
| Operating Humidity | H | 0 | 45 | % |
Application Example and corresponding Devices:
Designed and tested to operate with almost all BLANKOM
products.
Examples:
- HDC-5016 IP to QAM and IGS-900 streamer
- HDC-7016 DVB-S/S2 to QAM
- Professional Encoder: EMU 8xxx series
- All our boxed Decoder, IPTV SetTopBoxes, …
Quick-start:
This might vary because of different steps in development before this document was finished.
LCD OPERATING INSTRUCTIONs:
For setting configurations you can use the LCD control panel. The device will initialize to the main interface after power on, and press “Enter” into the main menu. The LCD turns off automatically after some seconds.
Some settings:
| Source | Press ◄ ► key to select HOMI/CVBS |
| Standard | Press ◄ ► key to select DTV standard DVB-C/DVB-T |
| Freq(Frequency) | Press ◄ ► key to move cursor and press ▼▲ to change numbers |
| Bandwidth | Press ◄ ► key to select 6,7,8 MHz, apply to DVB-T ONLY |
| Sym. Rate | Symbol Rate, set from 5.000 to 9.000 Msps, apply to DVB-C ONLY |
| MOD | Set mode range 64QAM, 128QAM, 256QAM, apply to DVB-C ONLY |
| LCD | Press ◄ ► key to edit |
| Service Name | Shown service ID,Enter and set up to 15 alphanumeric characters |
| Audio Format | Press ◄ ► key to select MPEG-1 Layer2/AAC |
| Network | Enter to set the IP Address/Subnet Mask/ Default Gateway |
| Advanced | Enter to set more TS setting |
| Theme | Change the LCD background theme |
Remark: CVBS source for devices with CVBS Input only.
Reset: Press ESC key 3 seconds to Restore factory settings.
The Menu with the LCD/Keypad is nearly self-explaining…
Audio encoding can be AAC or MPEG1L2 Stereo. If you change that, you’re receiving Decoder (TV or STB) need to be re-tuned to recognize the changes. Please set the PIDs and IDs accordingly to not conflict or harmonize with your existing COAX DVB-Channels.
Some recommendations:
DVB-C QAM settings:
256 is a good choice because of best data rates.
Symbolrate SR should be 6750-6900 max.
Frequency should be in the range of
the CELENEC Channel plan. See end of this document…
IN DVB-T mode:
FFT= 2000 or 8000 carrier, so best quality with 8K…, you can play with code-rates and so on if you have distortions detected in the receiver unit.
Guard Interval can be lowest 1/32 in Coax networks (not for over the air recommended).
Bandwidth 6, 7, or 8MHz…
Please note, that many TV sets/Receiver can only tune up to 862 MHz.
Higher bitrates assure higher picture
qualities…
Half FPS can be used to change the FPS from source to re-encode… FHD output can be chosen to interlace mode or Automatic according to the input.
An appropriate LCN can be set like to 1 if your channel should be the first to tune in TV sets supporting that. You should check whether you’re other DVB-Network channels crossing that in their NIT (Network Information Table).
ANNEX Channel Plan (CATV channel plan)
www.blankom.de
info@blankom.de
All technical data are subject to change w/o further notice …. © Irenis GmbH 07-2021
Documents / Resources
 |
BLANKOM HDM-901C-T HDMI CVBS Encoder DVB-C T Modulator [pdf] Owner's Manual HDM-901C-T HDMI CVBS Encoder DVB-C T Modulator, HDM-901C-T, HDMI CVBS Encoder DVB-C T Modulator, DVB-C T Modulator, Modulator |