Video & projection
Decimator DMON MultiViewers troubleshooting
The Decimator DMON MultiViewers problems live-event techs bring to Ask Roadie most (also called DD-12S, Decimator multiviewer, Decimator UCP, Decimator USB Control Panel). Pick your symptom, or describe your own in plain words, and get the likeliest fix first, with the manual page when there is one.
Common DMON MultiViewers errors & problems
What techs run into most, and what's usually behind it. The step-by-step fix for your exact unit is in Ask Roadie.
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3G-SDI output not recognized by downstream gear / 1080p60 SDI out no picture
Likely cause: A Level A device won't lock to Level B 3G and vice versa.
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DMON settings lost after power cycle / changes didn't save
Likely cause: Settings are committed to non-volatile memory on a delay; layouts are indexed per format/window-count.
- Step-by-step fixGet the fix →
multiview output glitches or rolls when input 1 is unplugged/changed
Likely cause: Locking the output timing to one input ties output stability to that input.
- Step-by-step fixGet the fix →
no audio on HDMI monitor from DMON multiviewer
Likely cause: DVI mode strips audio; multiview audio is de-embedded from a single chosen window.
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tally not showing on DMON windows / wiring GPI tally
Likely cause: Pin functions depend on GPI Mode; tallies are contact closures to ground.
- Step-by-step fixGet the fix →
update DMON firmware / USB Control Panel won't see the unit
Likely cause: UCP is the only firmware/advanced-config path; wrong Mac build or an old UCP won't detect newer units/OS.
Not on the list? Describe it your way, or paste the error code off the display. Ask Roadie works the problem with you until it's fixed or you have a clear next move.
How Ask Roadie helps with the DMON MultiViewers
- 1. Pick the Decimator DMON MultiViewers. It's already in the list.
- 2. Describe what you're seeing. In your own words, or the error code off the screen.
- 3. Get the likeliest fix first. Steps in order, the manual page when there is one, and a note when other techs have confirmed it.
- 4. Still broken? Tap 👎 and it keeps going from where you left off.
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