\u54c1\u724c\uff1a\u514b\u7f57\u6069-\u6d77\u7279
\nmodel\uff1a3988
\n\u5982\u679c\u60a8\u60f3\u4e86\u89e3\u4ea7\u54c1\u4fe1\u606f\uff0c\u8bf7\u8054\u7cfb\u6211\u4eec\u3002
\n\u8bf7\u63d0\u4f9b\u54c1\u724c\u3001\u578b\u53f7\u548c\u6570\u91cf\u4ee5\u4f9b\u67e5\u8be2\u3002<\/p>\n
<\/p>","protected":false},"excerpt":{"rendered":"
The Krohn-Hite Model 3988 Butterworth\/Bessel dual channel
\nfilter is one of a family of filters carefully designed with the user in
\nmind, providing ease of operation, reliability and price
\ncompetitiveness.
\nThe 3988 provides a tunable frequency range from 0.03Hz to
\n1MHz in the low-pass mode and 0.03Hz to 300kHz in the
\nhigh-pass mode. Both modes are extended down to 0.003Hz with
\nthe 002 option. The frequency response characteristic is either
\nmaximally flat (Butterworth) for clean filtering in the frequency
\ndomain, or linear phase (Bessel) to provide superior pulse
\n\u8fc7\u6ee4\u3002
\nEach channel of the 3988 is an 8-pole, wide range,
\nlow-pass\/high-pass filter or an amplifier providing gains to 70dB
\nin 0.1dB steps. The 3988 will accept input signals of \u00e610V peak at
\n0dB gain and has selectable ac or dc coupling. Overload detectors
\nare standard and assist the user in detecting input signals or
\nincorrect gain settings. Ninety-nine groups of non-volatile
\nmemory for storage of front panel set-ups are stored in
\nbattery-backed CMOS which can be recalled with a simple
\n\u6307\u6325\u3002<\/p>\n
\u2022 Two Channel
\n\u2022 Cutoff Frequency Range: 0.03Hz to 1MHz
\n\u2022 Attenuation Slope: 48dB\/Octave
\n\u2022 Filter Modes: Low-Pass and High-Pass
\n\u2022 Responses: Butterworth and Bessel
\n\u2022 Pre-Filter and Post-Filter Gains
\n\u2022 Input Type: Differential and Single-Ended
\n\u2022 Amplifier (Filter By-Pass) Mode
\n\u2022 GPIB Programmable<\/p>\n
\u4e70\u5bb6\u987b\u77e5<\/p>\n
1.\u5173\u4e8e\u4ea7\u54c1<\/p>\n
\u7531\u4e8e\u5e02\u573a\u6ce2\u52a8\u3001\u6c47\u7387\u53d8\u52a8\u7b49\u56e0\u7d20\uff0c\u4ea7\u54c1\u4ef7\u683c\u53ca\u4ea7\u54c1\u5c5e\u6027\u4ec5\u4f9b\u53c2\u8003\uff1b\u5177\u4f53\u4ea7\u54c1\u8981\u6c42\u4ee5\u5ba2\u6237\u8981\u6c42\u4e3a\u51c6\uff0c\u4ef7\u683c\u4ee5\u6c9f\u901a\u62a5\u4ef7\u4e3a\u51c6\u3002\u672c\u7f51\u7ad9\u6240\u6709\u4ea7\u54c1\u4ef7\u683c\u4e0d\u4f5c\u4e3a\u4ea4\u6613\u4ef7\u683c\uff0c\u4ec5\u4f9b\u53c2\u8003\uff01<\/p>\n
2.\u5173\u4e8e\u5546\u6807\u7248\u6743<\/p>\n
\u4e0e\u672c\u7f51\u7ad9\u76f8\u5173\u7684\u6240\u6709\u516c\u53f8\u540d\u79f0\u3001\u5546\u6807\u3001\u6807\u8bc6\u3001\u4ea7\u54c1\u56fe\u7247\u3001\u4ea7\u54c1\u8bf4\u660e\u3001\u4ea7\u54c1\u54c1\u724c\u540d\u79f0\u7b49\uff0c\u4ee5\u53ca\u5546\u6807\u7248\u6743\u7b49\u6240\u6709\u77e5\u8bc6\u4ea7\u6743\u5747\u5f52\u76f8\u5e94\u54c1\u724c\u6240\u6709\uff1b\u672c\u7f51\u7ad9\u4ec5\u4e3a\u65b9\u4fbf\u7528\u6237\u8bc6\u522b\u4ea7\u54c1\u800c\u8bbe\u3002
\n\u8bf7\u4ed4\u7ec6\u9605\u8bfb\u4e70\u65b9\u8bf4\u660e\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7ea0\u7eb7\u3002<\/p>\n
<\/p>\n
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