The required sequence comes from the approved RF device or module record. Externally biased depletion-mode and many GaN stages commonly require the gate condition before drain voltage, a verified quiescent drain-current window, RF enable only after bias is stable, and drain removal before the gate is released; internally biased or enhancement-mode modules may require a different order.
Write voltage thresholds, ramp rates, delays, timeouts, current limits and power-good validity for startup and shutdown. Reject a controller that cannot handle missing or partial rails, stuck enables, excessive drain current, overtemperature, loss of cooling or an interrupted sequence. Define safe state, latch or retry behavior, discharge and reset conditions instead of relying on a nominal timing sketch.
Provide the device bias instructions, gate and drain ranges, target quiescent current, allowed RF-enable point, normal pulse-current envelope and fault limits. Acceptance should capture the real gate, drain, enable, current and fault waveforms and inject representative faults; toggling a status bit alone does not prove device protection.