GLMedia — blank worksheet: SDI to Audio 4K, ALT and return. No tests performed. Event / date / person responsible / agreed pause / acceptable result: Exact model / unit / firmware / manual edition / versions: Sources A and B: model / video format / channels and content / identification: SDI IN / ALT SDI IN / SDI OUT / final receiver / audio outputs used: Switches 8,6,5 / mode / group / Output Levels / initial state: A only: picture / audio by channel / received format / evidence: B only: picture / audio by channel / received format / evidence: A+B: received source / LED / audio / evidence: Interrupt A: agreed segment / LED / B received / observed timing / interruptions: Restore A: final source / observed timing / interruptions / operator action: Black picture, frozen frame or missing voice with SDI present: symptom / reception / result: Cascade, if evaluated: stage / inputs / intended priority / output / destination: Each stage with no input / one source / two sources: output signal and content: Shared A/B dependencies: final converter / power / cabling / receiver: Agreed event configuration / open items / person responsible / saved evidence: Do not establish continuity from an LED indication or apply another model's results.