Apparatus, methods, and systems relate to an electrophysiology (EP) recording system for acquisition and preservation of cardiac electrical signals. The EP recording system provides defibrillator protection and radio frequency (RF) ablation signal noise suppression while preserving the integrity of relevant components of raw small signals. The EP recording system has a low-noise amplifier topology with minimal hardware filtering and a high-resolution A/D converter that provides clean, raw digital signals. The raw signals are filtered and processed by the EP system using software-based digital signal processing algorithms that allow the real-time display of signals as a raw signal, or as a combination of raw and processed signals simultaneously, in a single window or in multiple windows. The EP recording system allows for the synchronized display of signals with more than one signal processing algorithm applied at the same time, allowing a user to study signals filtered for specific purposes.本發明揭示之一種設備、方法及系統係關於用於心臟電信號之取得及保留之一電生理學(EP)記錄系統。該EP記錄系統提供去顫器保護及射頻(RF)燒蝕信號雜訊抑制,同時保留原始小信號之相關分量之完整性。該EP記錄系統具有擁有最小硬體濾波之一低雜訊放大器拓撲及提供乾淨原始數位信號之一高解析度A/D轉換器。該EP系統使用基於軟體之數位信號處理演算法來濾波及處理該等原始信號,該等基於軟體之數位信號處理演算法允許在一單個視窗中或在多個視窗中作為一原始信號即時地顯示信號或作為原始信號與經處理信號之一組合即時地同時顯示信號。該EP記錄系統允許在同時應用一個以上信號處理演算法之情況下進行信號之同步化顯示,從而允許一使用者研究針對特定目的而濾波之信號。