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| 可编程滤波器 |
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Our remote controlled Tunable Active Filters are analog, GPIB, signal conditioning filters that are digitally controlled via the front panel or over the GPIB interface bus. They are frequency discriminating instruments whose signal transmission characteristics are functions of frequency. Their basic function is to pass wanted signals and suppress unwanted signals, according to frequency. All Krohn-Hite filters provide a combination of reliability, performance and economy.
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Other Filter Products
General Purpose Tunable Filters | Signal Conditioning Systems | Fixed Frequency Filter Modules | Fixed Frequency Filter Systems
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SELECTION GUIDE
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Model
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Model 3900
Elliptic
Filter
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Model 3901
Elliptic
Filter
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Model 3940
Butterworth/Bessel
Filter
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Model 3944
Butterworth/Bessel
Filter
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Model 3945
Butterworth/Bessel
Filter
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Model 3955
Butterworth
Filter
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Model 3988
Butterworth/Bessel
Filter
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Front View
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Front View
Rear View
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Front View
Rear View
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Front View
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Front View
Rear View
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Front View
Rear View
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Front View
Rear View
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Attenuation Rate
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115dB/Octave
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115dB/Octave
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24dB/Octave
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24dB/Octave
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24dB/Octave
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24dB/Octave
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48dB/Octave
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Independent Channels
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2
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2
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2
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4
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3
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2
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2
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Cutoff Frequency
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1Hz to 99kHz
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1Hz to 99kHz
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3Hz to 2MHz
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3Hz to 2MHz
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3Hz to 25.6MHz
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170Hz to 25.6MHz
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0.03Hz to 1MHz, LP
0.03Hz to 300kHz, HP
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Responses
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Elliptical
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Elliptical
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Butterworth, Bessel
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Butterworth, Bessel
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Butterworth, Bessel
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Butterworth
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Butterworth
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Functions
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LP *
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LP, HP *
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LP, HP, BP, BR *
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LP, HP, BP, BR *
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LP, HP, BP, BR *
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LP *
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LP, HP, BP, BR
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BP, BR Channels
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None
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1
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1
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2
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1
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None
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2
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Input Type
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SE **, Differential
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SE **, Differential
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SE **
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SE **
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SE **
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SE **
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SE **, Differential
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Input Volts
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±10V peak
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±10V peak
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±4.5V peak
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±4.5V peak
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±4.5V peak
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±1.5V peak
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±10V peak
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Output Volts
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±10V peak
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±10V peak
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±6.5V peak
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±6.5V peak
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±6.5V peak
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±3V peak
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±10V peak
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Pre-Filter Gain
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40dB in 10dB steps
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40dB in 10dB steps
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20dB
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20dB
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20dB
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20dB
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50dB in 10dB steps
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Post-Filter Gain
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20dB in 10dB steps
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20dB in 10dB steps
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20dB
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20dB
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26dB
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26dB
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20dB in 0.1dB steps
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Data Sheet
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Data Sheet
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Data Sheet
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Data Sheet
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Data Sheet
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Data Sheet
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Data Sheet
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Data Sheet
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Manual
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Operating
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Operating
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Operating
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Operating
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Operating
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Operating
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Operating
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* LP = low-pass, HP = high-pass, BP = band-pass, BR = band-reject; Band-pass and band-reject require 2 channels. ** SE = Single-Ended
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