Overview
DMB-9581E Series Multi-Channel H.264 HD Encoder & Modulator (All-in-One) is a high-density, flexible integrated device that combines encoding, multiplexing, encapsulation, and modulation for 8/12/16/20 up to 24 HDMI inputs. It delivers outstanding HD encoding and modulation performance. In addition to HDMI inputs, the device also supports simultaneous tuner input, enabling demodulation of tuner signals alongside HDMI signal encoding. It provides configurable RF output in DVB-T/DVB-C/ATSC/ISDB-T/DTMB formats.
Encoder Modulator (also called Encoder-Modulator or Enc Mod) is a professional broadcast device that converts raw audio/video signals into a broadcast-ready TV signal.
In simple terms, it does two main jobs:
Encoding (Digitizing & Compressing):
It takes audio/video inputs (like HDMI, SDI, or IP streams) and converts them into a compressed digital stream (usually in MPEG-2, MPEG-4, H.264, or H.265 format). This makes the signal smaller for efficient transmission.
Modulating (Making it Broadcastable):
It takes that compressed digital stream and "modulates" it-meaning it places the data onto a specific radio frequency (RF) carrier signal. This creates a standard TV signal that can be understood by TVs or set-top boxes
Features:
Input
Version 1: Supports 4, 8, 12, 16, 20, or 24 HDMI inputs, plus 2 independent ASI inputs and 128 IP (SPTS/MPTS) streams, with multiplexing capability.
Version 2: Offers optional HDMI+Tuner hybrid input configurations, such as 16 HDMI + 8 Tuners or 8 HDMI + 16 Tuners. HDMI and Tuner inputs must be in multiples of 4, with a maximum combined total of 24 input channels.
Output
DATA1: IP output supporting RTMP, HTTP, RTSP, HLS, and SRT protocols.
DATA2: IP output supporting UDP/RTP protocol; plus 2 independent ASI outputs.
RF Output: Configurable for 16/24 RF carriers in DVB-T, ATSC-T, ISDB-T, Tb, or DTMB formats, or 32 RF carriers in DVB-C format.
(Note: ISDB-T RF output is limited to 1 ASI input and supports only 2K mode; 4K and 8K are not supported.)
Features
Outstanding modulation linearity and signal quality, with a Modulation Error Ratio (MER) of ≥ 40dB.
Energy-efficient design with high operational reliability, offering a Mean Time Between Failure (MTBF) of ≥ 50,000 hours.
Built-in multiplexing functionality for integrating locally sourced content with external Transport Stream (TS) or IP-based inputs.
Configuration memory is preserved during power loss.
Remote management and monitoring accessible through a standard web browser via the Ethernet port.
Firmware can be updated seamlessly over the network through the Ethernet interface.
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Specifications
IP Stream Input
Support 128*IP Streaming input SPTS/MPTS UDP/RTP each port, total 3*Gigabit port (DATA1/DATA2/DATA3)
Ethernet port Transport Protocol TS over UDP / RTP unicast and multicast,IGMP V2/V3
Transmission Rate Max 800Mbps for each input
ASI Stream Input
Support: 6*ASI input
Connector: BNC female, 75Ω
Signal Level: 200-800mVp-p
Packet Length: 188 bytes
Maximum bit-rate: per port≤100Mbps
RF Output Modulation
ISDB-T Modulation
ISDB-T RF out: 16*ISDB-T non-adjacent frequency RF out,
Frequency range: 96~864MHz,1Khz one step
ISDB-T Standard ARIB STD-B31
Constellation: DQPSK, QPSK, 16QAM, 64QAM
Guard Interval:1/32, 1/16, 1/8, 1/4
Transmission Mode:2K,4K,8K
Code rate:1/2, 3/4, 5/6, 7/8
Bandwidth:6MHz
TS bit rate＜21 Mbit/s
MER≥40 dB
total output level adjustment -35~-5dBm by 0.1 dB step
DVB-T Modulation
Channel:16*DVB-T non-adjacent frequency RF out
Frequency range: 96~864MHz,1Khz one step
Modulation standard: EN300744
Bandwidth: 6M, 7M, 8M
FFT mode: 2K, 8K
Constellation:QPSK,16QAM,64QAM
Guard Interval 1/4, 1/8, 1/16, 1/32
FEC 1/2, 2/3, 3/4, 5/6, 7/8
TS bit rate＜ 31 Mbit/s
MER≥40 dB
total output level adjustment: -35~-5dBm by 0.1 dB step
ATSC-T Modulation
Channel:16*ATSC-T non-adjacent frequency RF out
Frequency range:96~864MHz,1Khz one step
Constellation: 8VSB
TS bit rate＜19 Mbit/s
MER≥40 dB
total output level adjustment -35~-5dBm by 0.1 dB step
IP Stream Output
Support: 8*IP(MPTS/SPTS) UDP/RTP output from DATA 1Port
Multiplexing
Supports Up to 180 PIDs per channel with PID remapping (manual or auto)
Accurate PCR adjusting
Capable of PSI/SI SDI/PMT/TOT/PAT/BAT/CAT/TDT/NIT Insert
Control and Monitoring
Configuration Interface: Web-based
Remote: Upgrade via network
Connector: RJ45,100M/1000M Ethernet interface
Physical and Power
Voltage 110~220V
Consumption: 18~20W
Operating temperature: 0~50°C
Dimensions: 483mm(W)*360mm(D)*44.5mm(H)
Weight: 7KG/pc
