Video & projection
Decimator 12G-CROSS troubleshooting
The Decimator 12G-CROSS problems live-event techs bring to Ask Roadie most (also called 12G Cross, 12GCROSS, Decimator 12G). 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 12G-CROSS 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.
- Step-by-step fixGet the fix →
1080p50/60 SDI out shows no signal on downstream gear (3G level A/B)
Likely cause: 3G-SDI 1080p50/59.94/60 can be mapped as Level A or Level B; a receiver that only decodes one mapping shows no signal or a garbled image even though the cable and format are right.
- Step-by-step fixGet the fix →
black screen when input drops, want a colour/slate on no signal
Likely cause: Free-running the scaler/TPG keeps a stable raster so downstream switchers/monitors stay locked and show the chosen colour.
- Step-by-step fixGet the fix →
converted output drifts / drops frames / won't sync with house reference
Likely cause: The scaling engine can lock to the SDI, HDMI or genlock input.
- Step-by-step fixGet the fix →
need to flip image for rear-projection or upside-down mount
Likely cause: Flipping is done in the 4K scaling engine; direct input-to-output paths bypass it.
- Step-by-step fixGet the fix →
settings lost after power cycle
Likely cause: Changes made on the LCD menu are only persistent when saved; Load Defaults clears a confused configuration left by a previous job.
- Step-by-step fixGet the fix →
USB Control Panel won't see the 12G-CROSS / which control software version
Likely cause: 12G-CROSS support starts at USB Control Panel 3.0.0; older 2.x installs will not recognise the unit, and the Mac build must match the CPU type.
- Step-by-step fixGet the fix →
wrong colours / washed out on HDMI out (RGB vs YCbCr)
Likely cause: A colour-space or range mismatch between converter output and display gives crushed or washed-out blacks and shifted colours while the signal is otherwise fine.
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 12G-CROSS
- 1. Pick the Decimator 12G-CROSS. 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.