narrow the proportional band in small increments - сузить диапазон пропорциональности до/в???... Не подскажите?

[D07]

встречается в контексте

Every control loop has a characteristic critical frequency. This is the frequency where the gain must be kept sufficiently low for the system to be stable.
The objective is to tune the controller for maximum performance, keeping the gain at the critical frequency below the above mentioned limiting value.
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increase proportional band enough to keep gain sufficiently low

Спасибо!