Broadcast & Headend Modulators

Broadcast and headend modulators are the professional core of a coax TV plant — they convert SDI, HDMI and 4K sources into clean QAM, ATSC, DVB or ISDB channels for distribution across a facility, campus, MDU or cable plant. VeCOAX modulators give broadcast engineers a compact, computer-free, made-in-USA alternative built for 24/7 operation.

For live broadcast sources, the MICROMOD-3 SDI ingests 3G/HD/SD-SDI plus HDMI and AV, carries Closed Caption 608/708, and shows a color-bars reference on signal loss. For premium UHD feeds, the MINIMOD 4K delivers a true 4K channel. For density, the hot-serviceable VeCOAX ULTRA+ packs 4 or 8 channels with per-channel cards, and the RACK-4 and modular MINI BLADE round out the channel plan.

Every channel runs broadcast-grade encoding at +45 dBmV with MER above 45 dB, holds rock-steady across long cable runs, and is configured on a color display or web remote. Standards — QAM, ATSC, DVB-T/C, ISDB-T, DTMB — are selectable per channel, and outputs combine onto a single RF backbone with a coax combiner to form a complete headend.

All hardware ships same-day with a 5-year warranty, free unlimited tech support, and is designed and made in the USA — engineered for facilities that cannot afford downtime.

🏆 #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

Headend modulators by source and density

Choose by input type and the number of channels your plant carries.

SourceRecommended ModelChannelsOutput StandardsPrice From
SDI / HDMI / AVVeCOAX MICROMOD-3 SDI1QAM · ATSC · DVB-T/C · ISDB-T · DTMB$995
4K UHD HDMIVeCOAX MINIMOD 4K1QAM · ATSC · DVB-T2/C · ISDB-T$1,495
Multiple HDMIVeCOAX RACK-44QAM · ATSC · DVB-T/C · ISDB-T$1,830
High densityVeCOAX ULTRA+4 or 8QAM · ATSC · DVB-T/C · ISDB-T$2,449
HDMI / SDI / AV Sources cameras · players VeCOAX RF Modulator Coax Splitter existing cables TV TV TV · unlimited
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.
Engineering guide

Building a reliable coax headend

How do I combine many channels onto one plant?

Each modulator outputs a channel at a selectable frequency; feed them into a coax combiner to merge the full lineup onto a single RF backbone that every downstream TV scans.

What about uptime?

The ULTRA+ uses per-channel hot-serviceable cards, so a single channel can be serviced without interrupting the rest of the plant — the standard for 24/7 facilities.

Which standards are supported?

QAM, ATSC, DVB-T/C, ISDB-T and DTMB are selectable per channel, so the same hardware serves US cable/antenna plants and international DVB/ISDB systems. Encoding holds at MER above 45 dB for broadcast-clean signal.

Browse modulators by type

Put Broadcast Facilities video on every screen

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Free shipping over $500 · 5-year warranty · Free unlimited tech support · Made in USA