GLMedia — proposed worksheet: DL231, A/B preamps and input noise
BLANK. Does not establish tests or GLMedia solutions.
Event / FOH-monitor role / date / person responsible: __________________
DL231 / serial number / observed version / consoles and software: __________________
Original show preserved / copy / return state: __________________
Diagram: physical inputs, console channels, and ports at each end: __________
Sample rate / clock source observed on each device: __________________

PREAMPS AND PHANTOM
Physical input / channel A / channel B / compatible source: __________________
Initial preamp and trim on each side / screenshot: __________________
Observed 48V Control / agreed person responsible / source requirement: __________
Pass | Single control changed | A/B value afterward | Meters | Result
_____________________________________________________________________
_____________________________________________________________________
Phantom: [ ] pending [ ] tested. Command / operator / observed response: ______
Electrical measurement: [ ] not performed. If performed: method / result: _________
Initial state restored / pending items: __________________

NOISE PER INPUT AND SIDE
Physical input / console channel / side / port / identified cable: ____________
Source and initial levels / signal or silence condition: __________________
Versions and states captured before clearing/restarting: __________________
Ventilation and observable condition / time until symptom: __________________
Pass | Single variable | Path afterward | A/B symptom | Screenshot | Return
_____________________________________________________________________
_____________________________________________________________________
Recording: [ ] not performed. If available: file / source / point / date: _________
Manufacturer inquiry / applicable documentation / pending result: _________
Do not attribute noise to firmware or temperature without verifying the cause.
Do not change sample rate without checking compatibility of the entire chain.
Tests outside operation; do not fill in results that were not observed.
Reference: Midas DL231 Quick Start Guide V1.0; edition does not establish installed firmware.