Chiang R G, Knobloch C A, Singleton D M, Steel C G, Davey K G
J Neurosci Methods. 1985 Oct;15(1):15-20. doi: 10.1016/0165-0270(85)90058-5.
Electrical potentials recorded extracellularly from the sinus gland of the isopod, Oniscus asellus, were stored on video tape with the aid of a digital-audio (DA) processor and a video cassette recorder (VCR). The DA processor transforms the analog signal to digital pulses of equal amplitude and converts these pulses into a television signal for recording on video tape. In playback, the DA processor reconverts the pulses to an analog signal with negligible distortion. When viewed on the oscilloscope screen, electrical potentials reproduced by this method were indistinguishable from electrical potentials recorded 'live' from the sinus gland. However, electrical potentials recorded from the same sinus gland and reproduced by a conventional FM tape recorder were easily differentiated from the 'live' recording. The special effects inherent in the VCR (e.g. stop action, frame advance) also permitted detailed analysis of spontaneously occurring electrical potentials. Special effects were not possible with the FM tape recorder. The price, ease of operation and ability to produce extremely high quality recordings, makes the DA processor and VCR an exceptional system for storing electrophysiological data.
从等足类动物潮虫的窦腺细胞外记录到的电势，借助数字音频（DA）处理器和盒式磁带录像机（VCR）存储在录像带上。DA处理器将模拟信号转换为等幅数字脉冲，并将这些脉冲转换为电视信号以便录制在录像带上。在回放时，DA处理器将脉冲重新转换为失真可忽略不计的模拟信号。当在示波器屏幕上查看时，通过这种方法重现的电势与从窦腺“实时”记录的电势无法区分。然而，从同一窦腺记录并由传统调频磁带录音机重现的电势很容易与“实时”记录区分开来。VCR固有的特殊效果（如定格、逐帧前进）也允许对自发产生的电势进行详细分析。调频磁带录音机则无法实现这些特殊效果。DA处理器和VCR的价格、操作简便性以及产生极高质量记录的能力，使其成为存储电生理数据的出色系统。
