Collection: SDI Modulators

SDI modulators take a professional 3G/HD/SD-SDI video signal — the standard output of broadcast cameras, production switchers and pro AV gear — and turn it into a real digital TV channel distributed over coax to unlimited TVs. They are the right tool whenever your source uses locking BNC SDI connectors and you need that live feed on every screen in a stadium, studio, house of worship, hospital or campus.

The VeCOAX MICROMOD-3 SDI ($995) is the broadcaster's choice single-channel modulator. Beyond 3G/HD/SD-SDI it also accepts HDMI (licensed) and analog AV (CVBS), all selectable on its color display, so one box covers cameras, players and legacy gear. It encodes broadcast-grade Full HD up to 1080p60 with Dolby Digital AC-3 audio (plus MPEG1-L2 and AAC), carries Closed Caption 608/708, and shows a built-in color-bars reference on input loss for fail-safe live applications.

Setup is computer-free from the color display, the +45 dBmV output drives TVs up to 1,500 ft, and it supports QAM, ATSC, ISDB-T, DVB-T/C and DTMB worldwide standards. Real-time processing keeps latency low enough for live broadcast and worship workflows.

Need HDMI-only HD instead? See the compact HDMI modulators. Distributing multiple SDI or HDMI channels? Combine several modulators with a coax combiner. The MICROMOD-3 SDI is backed by a 5-year warranty, free lifetime tech support, same-day shipping, and is designed and made in the USA.

🏆 #1 Modulator in USA Since 2017🇺🇸 Designed & Made in USA🛡️ 5-Year Warranty📞 Free Lifetime Tech Support⚡ Same-Day Shipping📺 Works With Any TV

Compare the range

SDI vs HDMI: which modulator fits your source?

If your gear outputs SDI on BNC, you need an SDI modulator. Here is how the MICROMOD-3 SDI compares to the HDMI-only compact options.

Model	SDI Input	HDMI Input	AV Input	Closed Caption	Price
VeCOAX MICROMOD-3 SDI	Yes — 3G/HD/SD-SDI	Yes	Yes (CVBS)	608/708	$995
VeCOAX MINIMOD 2+	No	Yes	No	Via source	$445
VeCOAX MINIMOD 4K	No	Yes (4K)	No	Via source	$1,495

How it works: HDMI, SDI or AV sources connect to the VeCOAX modulator, which broadcasts crisp digital TV channels across your existing coax to unlimited TVs — no new cabling, no computer.

VeCOAX MICROMOD-3 SDI — 3G-SDI / HDMI / AV RF Modulator Over Coax

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VeCOAX MICROMOD-3 SDI — 3G-SDI / HDMI / AV RF Modulator Over Coax

3G-SDI, HDMI & AV inputs. Broadcast HD over coax with closed caption.

Regular price $995.00 USD

Regular price ~~$1,295.00 USD~~ Sale price $995.00 USD You save $300.00

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Buyer's guide

Why broadcasters choose SDI distribution

When do I need an SDI modulator instead of HDMI?

Choose SDI when your camera, switcher or router outputs 3G/HD/SD-SDI on locking BNC connectors, when cable runs from the source are long (SDI travels much farther than HDMI), or when you need a rock-solid live feed. The MICROMOD-3 SDI also accepts HDMI and AV, so it doubles as a universal input modulator.

Does it carry closed captions and reference on signal loss?

Yes. It passes Closed Caption 608/708 via SDI, CVBS or in-HDMI, and displays a built-in color-bars reference if the input drops — so your channel never goes to a black, untuned screen during live events.

Is it fast enough for live worship and sports?

Yes. Real-time processing keeps latency low for live applications, and the +45 dBmV output delivers a clean HD channel up to 1,500 ft over existing coax to unlimited TVs.