BLANKOM HDM-9508C DVB Modulator gif

DVB Modulator with 4-8 HDMI Inputs | HDM-9500 series

BLANKOM HDM-9504/HDM-9508

The full-featured BLANKOM HDM-9500 Modulator is ideal for small CATV head-end systems, and it’s a smart choice for hotel TV systems and entertainment systems in sports bars, hospitals, and apartment complexes. It is a simplified, lower-cost version of the HDM-9400 modulator family.

Features

4/8 HDMI Inputs
DVB-C, DVB-T RF Output Alternatives
Multiplexer
64/128 SPTS IP input
Ordering guide

HDM-9504C: 4 HDMI Inputs, DVB-C Output
HDM-9504T: 4 HDMI Inputs, DVB-T Output
HDM-9508C: 8 HDMI Inputs, DVB-C Output
HDM-9508T: 8 HDMI Inputs, DVB-T Output

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DVB Modulator with 4-8 HDMI Inputs, DVB-C or DVB-T Output

 

BLANKOM HDM-9500 is a high-integration professional modulator that combines encoding, multiplexing, and modulation into a single unit. Available in 4 different versions, it has several input and output combinations. All the available content can be multiplexed into several packets and modulated into RF carriers.

BLANKOM HDM-9508C DVB Modulator

BLANKOM HDM-9508C DVB Modulator

  • 4/8 HDMI Inputs
  • 2/4 RF Carriers
  • DVB-C or DVB-T  RF Carrier Output
  • Multiplexer
  • 64/128 SPTS IP Input
  • 2/4 MPTS IP Output
  • 4 versions:
    HDM-9504C: 4 HDMI Inputs, DVB-C Output
    HDM-9504T: 4 HDMI Inputs, DVB-T Output
    HDM-9508C: 8 HDMI Inputs, DVB-C Output
    HDM-9508T: 8 HDMI Inputs, DVB-T Output
  • Logo/text injection to the encoded videos
  • PID filtering and re-mapping
  • PSI/SI rebuilding and editing
  • Remote control and firmware, web NMS management
  • MPEG-1 Layer 2, LC-AAC, HE-AAC and AC3 pass-through audio encoding, audio gain adjustment
  • Web-based network management.
  • Professional quality, breakthrough price

 

1. Audio / Video Input Profiles

    • Physical Hardware: 4 or 8 × HDMI 1.4 inputs equipped with automatic HDCP 1.4 hardware pass-through.
    • IP Stream Ingest: 128 × IP inputs over UDP and RTP protocols via the Gigabit Ethernet (GE) DATA port for re-multiplexing external streams.
    • Resolution Support: Captures interlaced and progressive formats:
        • Input Resolution: 1080p @50/60Hz, 1080i @50/60Hz, 720p @50/60Hz.
        • Output Conversion: Scales down to 1080p @25/30Hz, 720p @25/30Hz.

2. Compression & Encoding

    • Video Encoding Standards: Compliant with HEVC / H.265 and MPEG-4 AVC / H.264.
    • GOP Processing Topology: Utilizes highly efficient IBBP (B-frame) and IPPP compression layouts via integrated Fujitsu chips.
    • Compression Bitrates: 0.5 Mbps to 20 Mbps per channel (H.265 mode) or 4 Mbps to 20 Mbps (H.264 mode) using CBR or VBR rate targets. This allows you to broadcast 1080p HD video at less than half the bandwidth required by older systems.
    • Audio Compressions: MPEG-1 Layer II, LC-AAC, HE-AAC, and HE-AAC V2 with software audio gain adjustments.

3. Modulator Module Options (DVB-C vs. DVB-T)

Depending on which factory module variation is slotted inside the 1U backplane, the modulation metrics alternate as follows:

Modulation Metric DVB-C Layout DVB-T Layout
Carrier Capability 2 or 4 adjacent carriers 2 or 4 adjacent carriers
Broadcast Standard J.83A (Europe), J.83B (USA) ETSI EN 300 744
Constellation Mapping 16/32/64/128/256QAM QPSK, 16QAM, 64QAM
Guard Interval Ratios N/A 1/4, 1/8, 1/16, 1/32
Transmission Mode N/A 2K and 8K COFDM
Code Rate (FEC) N/A 1/2, 2/3, 3/4, 5/6, 7/8
Channel Bandwidth N/A 6 MHz, 7 MHz, 8 MHz
Frequency Range 50 MHz to 960 MHz (1 kHz steps) 50 MHz to 960 MHz (1 kHz steps)
Signal Purity MER ≥ 42 dB MER ≥ 42 dB

4. Concurrent Network Stream Outputs

    • IP Mirroring Out: Transmits 2 or 4 MPTS network streams mirroring the physical RF carrier modulations over UDP and RTP.
    • Direct IP Streaming: Supports simultaneous streaming of 4 or 8 distinct SPTS streams directly from the local HDMI encoder chips.

5. Headend Management & Software Utilities

  • Local Media Overlays: On-Screen Display engine supports adding custom watermark logos, crawling warning banners, and QR codes per individual HDMI channel.
  • Multiplexing Engine: Provides a local PID cross-matrix for complete PID re-mapping, PCR accuracy alignment, and direct editing of PSI/SI metadata tables (PAT, PMT, NIT, SDT).
  • System Controls: Managed over any local computer network using a standard web browser interface.

 

 

BLANKOM HDM-9508C DVB Modulator block diagram

 

BLANKOM HDM-9508C DVB Modulator Application

 

 

BLANKOM HDM-9508C DVB Modulator

BLANKOM HDM-9508C DVB Modulator

 

 

Function DVB Modulator

Input 4/8 HDMI inputs; 64/128 IP inputs
Video Encoding MPEG-4 AVC/H.264
Resolution Input 1920×1080p60,1920×1080i60, 1920×1080p50,1920×1080i50, 1280×720p60, 1280×720p50, 720×576i50,720×480i60,
Output 1920×1080p30, 1920×1080p25, 1280×720p30, 1280×720p25, 720×576p25,720×480p30,
Bit-rate 1Mbps…13Mbps each channel
Rate Control CBR/VBR
Audio Encoding MPEG-1 Layer 2, LC-AAC, HE-AAC and AC3 Pass-Through
Sampling rate 48KHz
Resolution 24bit
Audio Gain 0…255 Adjustable
MPEG-1 Layer 2 bitrate 48/56/64/80/96/112/128/160/192/224/256/320/384 kbps
LC-AAC bit-rate 48/56/64/80/96/112/128/160/192/224/256/320/384 kbps
HE-AAC bit-rate 48/56/64/80/96/112/128 kbps
Multiplexing Maximum PID Remapping 180 inputs per channel
Function PID remapping (automatic or manual)
Generating of PSI/ SI tables automatically
Modulation DVB-C RF out 2/4 x RF DVB-C out (2/4 carriers on combined IN -> Output)
Standard EN300429/ITU-TJ.83A/B: DVB-C Annex A/B
MER ≥40dB
RF frequency 50…960MHz, 1KHz step
RF output level -25…-1dBm (82…105 dBµV), 0.1dBm
Symbol Rate 5.0Msps…7.0Msps, 1ksps stepping
J.83A J.83B (US)
Constellation 16/32/64/128/256QAM 64/256 QAM
Bandwidth 8MHz 6M
 

DVB-T

 Standard EN300744
FFT mode 2K
Bandwidth 6MHz, 7MHz, 8MHz
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
MER ≥42 dB
RF frequency 50…960 MHz, 1KHz steps
RF outlevel 2/4xRF COFDM DVB-T out (2/4 carriers combined output) -28… -3 dBm (77…97 dBµV), 0.1dB step
Output RF output (F male) 75 Ohm
Stream output 2/4 IP MPTS outputs over UDP/RTP/RTSP, 1x1000M Base-T Ethernet interface
System English Network management (WEB-GUI), Software upgrade via Ethernet
Misc Dimensions (W×L×H) 482mm×328mm×44mm
Environment 0…45℃(working)； -20…80℃（Storage）
Power AC 110V± 10%, 50/60Hz, AC 220 ±10%,50/60Hz

Specifications are subject to change without prior notice.

 

The BLANKOM HDM-9500 series is designed with a highly flexible software-defined modulation core. It supports all major global digital RF television standards, including DVB-T (COFDM), DVB-C (QAM), ATSC, and ISDB-T. The modulation standard can be easily switched and configured via the web management interface, allowing system integrators to deploy the exact same hardware across different regional broadcasting geographies.

Yes, the HDM-9500 series features an advanced dual-output architecture. It processes the multi-channel HDMI inputs and simultaneously distributes them as modulated digital RF carriers (CATV) and as multicast/unicast IP streams (SPTS/MPTS) over UDP/RTP. This enables hybrid distribution topologies where video feeds can feed legacy coaxial cable TV networks and modern IPTV networks concurrently.

Yes, the unit integrates a professional-grade PSI/SI (Program Specific Information / Service Information) table editor. It fully supports LCN (Logical Channel Numbering), allowing network operators to pre-define the exact channel layout and numbers displayed on the end-user TV sets. It also provides comprehensive PID Remapping, Service Name Editing, and Provider ID configuration to maintain strict digital multiplexing standards.

The HDM-9500 series utilizes high-density hardware encoding engines that support H.264/AVC (MPEG-4) video compression, ensuring universal compatibility with nearly all standard digital TV tuners and older HD Set-Top Boxes. It accepts input resolutions up to 1080p at 60fps and provides individual bit-rate adjustments per channel (CBR/VBR) to optimize spectrum and bandwidth management.

The HDM-9500 architecture is highly scalable and typically available in configurations offering either 4 or 8 HDMI physical input ports in a compact 1U rack-mountable chassis. The hardware encoding engine is fully compatible with standard commercial digital sources, and it handles non-encrypted or authorized B2B HDMI feeds seamlessly to avoid decryption or blank screen synchronization errors.

To match professional broadcast and commercial audio distribution demands, the HDM-9500 series supports MPEG-1 Layer II (MP2) and MPEG-4 AAC audio compression layers. The encoder directly extracts the digital embedded audio from each HDMI input channel, digitizes it according to selected audio profiles, and pairs it precisely with the video payload to guarantee perfect lip-sync across all RF and IP outputs.

The digital up-converter RF output stage of the HDM-9500 is engineered to generate multiple adjacent RF carriers (e.g., 4 or 8 channels grouped consecutively in the VHF/UHF frequency band). This high-density RF modulation technique optimizes the available coaxial spectrum, reduces the need for external active combiners, and ensures an exceptionally high MER (Modulation Error Ratio) value for crystal-clear signal delivery over long cable runs.

Yes, the unit features a dedicated NMS (Network Management System) Ethernet port. Network administrators can completely configure, control, and monitor all parameters—such as frequencies, RF output attenuation levels, bit-rates, and IP addresses—via an intuitive, built-in WebGUI (Web Browser Interface). For larger corporate deployments, SNMP support is integrated to allow real-time monitoring and anomaly alerts.

Built inside a heavy-duty metal chassis with temperature-controlled internal cooling fans, the HDM-9500 series delivers a certified 99.999% continuous uptime architecture. It ensures flawless, permanent 24/7/365 operation in high-density hotel and corporate CATV headends.

Yes, all product pages on irenis-blankom.com, including the HDM-9500 series, provide direct access to comprehensive, down-to-date technical PDF Datasheets. Additionally, due to the different hardware variants available (such as specific DVB-T/C tuner combinations or 4 vs 8 port options), an explicit Ordering Guide table is provided directly on the page to assist system integrators in selecting the perfect hardware suffix for their technical projects.

 

 

 

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