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ETC Response Mk2 Gateway troubleshooting
The ETC Response Mk2 Gateway problems live-event techs bring to Ask Roadie most (also called DMX gateway, Response gateway, Response Mk2). 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 Response Mk2 Gateway 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 →
DMX line unreliable, errors, or reflections on long runs - termination questions
Likely cause: Proper end-of-line termination prevents signal reflections that corrupt DMX/RDM data on longer or multi-device runs.
- Step-by-step fixGet the fix →
DMX output briefly drops for under a second whenever a configuration change is made
Likely cause: A config change reinitializes the port hardware, causing a brief blank before it resumes sending.
- Step-by-step fixGet the fix →
Front-panel shows "User Interface Locked" when opening Setup or Operations
Likely cause: The UI lock is a Concert-managed security setting; only Concert can toggle it back off.
- Step-by-step fixGet the fix →
How to update firmware and what the current latest version is
Likely cause: CPU1 and CPU2 hardware use separate firmware trees; loading the version that matches the CPU is required, and UpdaterAtor handles the transfer over the network.
- Step-by-step fixGet the fix →
Port indicator LED is green and fast-blinking; output flickers or is unstable
Likely cause: DMX-512 is a single-transmitter bus; two devices driving the same line corrupt the packet stream, which the gateway flags as a collision.
- Step-by-step fixGet the fix →
Port indicator LED is red and fast-blinking on an input port
Likely cause: The red states report the input side; a fast-blink specifically flags a malformed/invalid incoming DMX stream rather than simply no signal.
- Step-by-step fixGet the fix →
RDM devices are not being discovered / no RDM data from fixtures
Likely cause: The gateway will not initiate E1.20 RDM controller transactions until discovery is explicitly enabled; input ports and non-RDM-terminated lines cannot carry the bidirectional RDM traffic.
- Step-by-step fixGet the fix →
Want output to hold (not blackout) when the sACN source is lost
Likely cause: HLL keeps the DMX frame latched at the last valid values instead of snapping to zero when sACN drops, avoiding an unwanted blackout mid-show.
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 Response Mk2 Gateway
- 1. Pick the ETC Response Mk2 Gateway. 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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