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Simulate a lost video signal

The demo's sources report whether they have video signal. When a source loses signal, the UI shows it:

  • The source's dot turns from green to red.
  • Basic sharing and the advanced destination cards show No Signal under the source.
  • The matching input on the tech Routing page shows the loss too.

You can break a source's signal at startup or while the program runs.

At startup

In the source's device entry, set startsWithSync to false:

{ "key": "source-cable", "name": "Cable TV", "type": "mockHdmiSource", "properties": { "startsWithSync": false } },

Run progreset -p:1. Cable TV starts with no signal.

While the program runs

Call the source's SetVideoSyncDetected method, from the console or from Essentials Dev Tools.

In the processor console, run:

devjson:1 {"deviceKey":"source-cable","methodName":"SetVideoSyncDetected","params":[false]}

Every connected UI updates immediately. Restore the signal with true:

devjson:1 {"deviceKey":"source-cable","methodName":"SetVideoSyncDetected","params":[true]}

Both call the same method, and both can call any public method on any device. See Inspect and control devices.

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