ZeeVee ZvPro820 HD QAM Modulator
- Two channels of SD or HD distributed over existing coax
- Up to 1080i/p resolution from HDMI sources
- MPEG-2 QAM encoder/modulator, frequency agile
- Dolby Digital AC-3 5.1 audio support
- 25 to 45dBmV QAM output, adjustable in 1dBmV steps
- Built-in media player adds an information channel
- Web or front panel LCD management via Maestro
- Five year warranty
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A rack unit for feeding many displays from a couple of sources over coax already in the walls. It needs a QAM tuner at each screen and does not carry HDMI out to the TVs.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B00IMMYZNGModel: ZvPro820Category: Video Converters
Overview
A frequency agile QAM encoder and modulator takes video from a source, compresses it in MPEG-2 and places it on the coax plant as digital cable channels. Displays with a built in QAM tuner then tune those channels like any broadcast, so the run to each screen stays coaxial. Front panel controls and a web interface handle setup and channel changes.
Where a building already has coax to every room, this puts a pair of channels of programming on that wiring without pulling new cable. The screens still need their own QAM tuners, and the box takes video in through ZeeVee's component or VGA to DIN cabling rather than plain HDMI.
Who it's for
Senior living centers, sports bars, student housing and arenas that want a couple of channels on the existing coax distribution. A home theater with a single HDMI run has no use for it, and neither does anyone expecting the unit to output HDMI to the TVs.
Pros and cons
- Two channels on one unit
- Runs over existing coax
- Output level adjustable in small steps
- Built-in player adds an information channel
- Displays need their own QAM tuner
- Input is component or VGA to DIN, not HDMI
- No set-top boxes or media players included
- Coax cable and source cables not listed
Performance notes
Picture quality depends on the source resolution the encoder receives and on the QAM output level set for the cable run; too high a level overloads a short plant, too low fades at the far end. MPEG-2 compression holds the stream inside one channel's bit budget, and the tuner in each display does the decoding.
Specifications
| Brand | ZeeVee |
|---|---|
| Model | ZvPro820 |
| Item Weight | 4.99 pounds |
| Dimensions | 21 × 5.1 × 9.7 inches |
| Dimensions | 21 x 5.13 x 9.75 in |
Frequently asked questions
How large a coax system can the ZvPro820 feed?
The description puts no limit on the number of displays, so the reach is set by the coax plant itself rather than the unit. Each screen still needs a built-in QAM tuner to pick up the channels.
What kind of cable connects a source to the ZvPro820?
ZeeVee's component or VGA to DIN cabling connection system. The unit is not fed by a plain HDMI cable, and the description points to the ZvPro610 or ZvPro620 for HDMI input.
Can I set up the ZvPro820 without a computer?
Yes. The front panel has a color LCD screen for local management, and the same settings can be reached remotely through the web based Maestro system.
Does the ZvPro820 replace the set-top boxes at each TV?
It removes the need for set-top-boxes or media players at each display because the TV's own QAM tuner receives the channels. The unit itself does not ship with any receivers or players.
How is the QAM output level adjusted?
Power output is controlled across the full range in single step increments, so the level can be matched to the length and loss of the coax run.