The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →The Decimator MD-HX is more than an HDMI-to-SDI adapter: it is a configurable HDMI/SDI cross converter with a scaler and frame-rate conversion. Its key setup choice is whether each output takes a direct input feed or the Scaler path. Select Scaler when you need format conversion; direct routing bypasses the scaler. Before buying or deploying one, check its serial family and confirm that your source and destination formats match the supported conversion path.
What the Decimator MD-HX does
The MD-HX converts between HDMI and 3G/HD/SD-SDI and can scale and convert frame rates. It can route outputs directly from an input or from its scaler, making it useful when a production chain needs conversion rather than simple connector adaptation. Decimator lists 245 input formats and 41 output formats across supported conversion paths, including 204 VESA formats on HDMI and 2K support. These counts do not mean every input can be converted to every output: check the exact source timing, destination timing, frame rate, and route.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
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Decimator MD-LX HDMI/SDI Bidirectional Converter | $119.00 | Buy on Amazon |
| 2 |
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Decimator MD-LX HDMI/SDI Bidirectional Converter (4-Pack) with 4X HDMI Cables | $579.99 | Buy on Amazon |
| 3 |
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Decimator Power Pack for MD-LX Converter | $44.00 | Buy on Amazon |
| 4 |
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Decimator MD-LX HDMI/SDI Bidirectional Converter Bundle | $149.00 | Buy on Amazon |
| 5 |
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Decimator MD-LX x2 with 2 HDMI Cables | $299.99 | Buy on Amazon |
The unit has four SDI outputs, an LCD and buttons for local control, and USB for control and firmware updates. Audio-pair rearrangement is configurable. Decimator describes the enclosure as a solid, robust aluminum case and says the unit has no fan; those are manufacturer statements, not independent test findings. The brochure gives dimensions of 79.5 × 123 × 29.5 mm and a power input range of +5 V to +32 V DC. Packaging can vary, so confirm the included power supply and cables with the seller.
Check the hardware revision before relying on V2 features
Decimator distinguishes newer units with serial numbers beginning CLD, CLE, or CLF from legacy CLA, CLB, and CLC units. The expanded V2 feature set is listed for the newer serial families; do not assume an older unit has it without checking its hardware and firmware.
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- Auto Select: Active input to all outputs / or SDI to HDMI & HDMI to SDI if both inputs are active
- HDMI input to SDI output & SDI input to HDMI output
- SDI input to HDMI and SDI outputs
- HDMI input to HDMI and SDI outputs
- Supports 3G Level A and B and allows for conversion between both
| Feature | What Decimator lists for V2 units |
|---|---|
| HDMI input formats | 204 VESA formats, subject to supported conversion paths |
| Video formats | 2K formats in addition to broadcast formats |
| Monitoring overlays | 16-channel audio meters, safe-action and safe-title graticules, center cross, customizable UMD text, and input/output format status |
| Test patterns and tone | 58 selectable video patterns across 41 output formats; audio-tone generation on SDI and/or HDMI |
Decimator calls its scaler proprietary and claims improved sharpness, reduced aliasing, and better image quality than conventional polyphase approaches. That is a vendor performance claim; no independent comparative bench test is established here.
How to set up an MD-HX for HDMI-to-SDI or SDI-to-HDMI conversion
The basic menu behavior below follows Decimator’s Hardware Manual FV1.5, copyright 2015–2023. That manual predates the current V2 feature set, so menu details for newer firmware may differ. On startup, the display opens at Input Status, showing detected SDI and HDMI inputs and the scaler/DUC output format. The top-level menus are Input Status, Control, Scaling, Audio, and Setup. Left and right move between menus; ENTER opens a menu or toggles a parameter; BACK returns to the prior level.
Rank #2
- Four compact bidirectional converters supporting up to 1080p60 resolution
- HDMI and 3G/HD/SD-SDI inputs and outputs for versatile device compatibility
- Automatic input detection and multiple routing modes for flexible setups
- Secure locking connections to protect against accidental cable removal
- Four high-speed HDMI cables supporting 4K at 60Hz and 18 Gbps bandwidth
- Connect the source. Connect the source to HDMI IN or SDI IN. Connect the destination to the corresponding output, using suitable HDMI or SDI cabling for the signal chain.
- Choose the output source. In Control, set SDI OUT SOURCE and/or HDMI OUT SOURCE to SDI IN, HDMI IN, or Scaler. Set each output independently as needed. For example, to convert an HDMI source to SDI, set SDI OUT SOURCE to Scaler if the desired SDI format requires scaling or frame-rate conversion. A direct HDMI IN route is not the scaler path.
- Configure scaling when required. Open Scaling and set the scaler source, reference, output format, and aspect controls for the job. Check that the chosen output format is compatible with the destination and the input-to-output conversion path.
- Check signal status. Return to Input Status and verify that the expected inputs are detected and the scaler/DUC output format is the one required by the chain.
- Allow settings to save. The FV1.5 manual says changes apply immediately and are saved after 10 seconds. Do not disconnect power during that save interval.
For a straightforward cross-conversion route, the essential decision is the output source: choose the input directly when you want a pass-through route, or choose Scaler when the output needs the MD-HX’s format conversion. The manual describes the source selection for firmware version 1.5; check the documentation supplied for the specific unit when using current V2 firmware.
Compatibility checks for a production chain
Compare the exact signal at every boundary rather than relying on a broad label such as “HDMI” or “3G-SDI.” The manufacturer lists support for 3G level A and B and conversion between them on its product page; the current brochure also identifies 3G-A and 3G-B formats. Confirm the required level and direction for your equipment.
Rank #3
- RELIABLE POWER - Ensures stable operation of your Decimator MD-LX converter with a dedicated 5V power adapter, eliminating power fluctuations for uninterrupted performance.
- EASY SETUP - Simply plug in the included US power adapter and USB Type-A to micro-USB cable for immediate power supply to your Decimator MD-LX converter, hassle-free.
- BROAD COMPATIBILITY - Specifically designed for the Decimator MD-LX converter, guaranteeing seamless integration and optimal power delivery for consistent functionality.
- CONVENIENT LENGTH - The 4.9' (1.5m) USB Type-A to micro-USB cable provides ample reach, allowing flexible placement of your Decimator MD-LX converter in various setups.
- PEACE OF MIND - Comes with a Decimator 3-year limited warranty, protecting your investment and ensuring long-term reliability for your MD-LX converter power needs.
- Record the source resolution, frame rate, and interface before connecting the chain.
- Confirm the destination accepts the selected output format and frame rate.
- Check whether the route requires scaling or frame-rate conversion; a direct input assignment does not use the scaler.
- If the signal is 3G-SDI, verify whether the source and destination require level A or level B.
- If you need 2K or computer VESA timings, identify the serial family and verify the exact timing rather than assuming universal HDMI compatibility.
- If overlays, patterns, or tone generation matter, verify that the serial begins CLD, CLE, or CLF and confirm the installed firmware.
Common setup problems and fixes
The output is missing or shows the wrong format
Check that the source is connected to the correct input and appears on Input Status. Then inspect the relevant output-source setting in Control. If conversion is required, select Scaler and check the scaler output format in Scaling. Also verify that the destination supports the chosen format and frame rate.
The signal passes through but is not being converted
The output may be assigned directly to SDI IN or HDMI IN. In Control, change that output’s source to Scaler, then configure the scaler’s source and output format in Scaling.
Rank #4
- Bundle Includes: Decimator MD-LX HDMI/SDI Bidirectional Converter, Viper 12G SDI BNC Cable (6-Feet, Black), Koah PRO Pre-Moistened Lens Cleaning Wipes (100-Pack), Knox Gear Nylon-Braided 4K High-Speed HDMI Cable with Ethernet (6-Foot) and Hook and Loop Fastening Cable Ties (10-Pack, Black)
- Resolution: Supports up to 1080p60 resolution and offers multiple input/output conversion modes
- 3G Conversion: Supports 3G level A and B on the input and output, allowing conversion between 3G level A and B
- Portable Size: Pocket-sized bi-directional converter can be controlled via USB on Mac/Windows applications
- Features: The Decimator MD-LX is a pocket-sized bi-directional converter featuring an HDMI input and output on one side and 3G/HD/SD-SDI input and output on the other
A required VESA, 2K, overlay, or test-pattern option is absent
Check the serial family and firmware. Decimator assigns the expanded V2 feature set to CLD, CLE, and CLF units; legacy CLA, CLB, and CLC serials should not be presumed to support it.
Changes do not persist after a power cycle
After changing a parameter, leave the unit powered for at least the manual’s 10-second save interval. The FV1.5 manual warns against powering down during this period.
Best Value
- Compact Bidirectional HDMI/SDI Converter Supporting Up to 1080p60
- HDMI and 3G/HD/SD-SDI Inputs and Outputs with Auto-Select Functionality
- Multiple Signal Conversion Modes Including HDMI-to-SDI and SDI-to-HDMI
- Locking HDMI and SDI Inputs for Secure Connections
- Supports UltraHD 4K at 60Hz and Full HD 1080p Resolutions
USB control or updating is unavailable
Confirm the hardware revision and use the software and firmware listed for that unit on Decimator’s Downloads page. Update compatibility can depend on hardware revision and software.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Buying considerations and price context
Decimator’s product page lists a US$295 MSRP. That is the manufacturer’s stated suggested retail price, not a verified current street price or availability quote. Confirm the exact serial family, included accessories, and current stock with the seller before purchase. The manufacturer provides a reseller directory.
The MD-HX is worth considering when a compact unit needs to bridge HDMI and SDI formats, route outputs independently, and scale or convert frame rates. Its format counts are broad, but they are not a substitute for checking the exact timing and route in your chain. For basic pass-through or conversion, make the routing choice deliberately; for revision-specific monitoring and test features, verify the serial family first.
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Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
