美國KROHN-HITE3988濾波器，KH3988濾波器詳細描述美國KROHN-HITE3988濾波器，KH3988濾波器
美國KROHN-HITE3988濾波器規格   

Krohn-Hite3988Butterworth/Bessel雙通道濾波器是仔細設計的濾波器系列之一，提供易于操作，可靠性性高。

KH3988濾波器在低通模式下提供0.03Hz至1MHz的可調諧頻率范圍，在高通模式下提供0.03Hz至300kHz的可調諧頻率范圍。這兩種模式都可以通過002選項擴展到0.003Hz。頻率響應特性在頻域中進行干凈濾波，或者線性相位（Bessel）可以最大限度地平坦（Butterworth），以提供卓越的脈沖濾波。
KH3988濾波器的每個通道是8極，寬范圍，低通/高通濾波器或放大器，以0.1dB的步長提供70dB的增益。KH3988濾波器將接收0dB增益的10V峰值的輸入信號，并具有可選擇的交流或直流耦合。過載檢測器是標準配置，可幫助用戶檢測輸入信號或不正確的增益設置。用于存儲前面板設置的九十九組非易失性存儲器存儲在電池支持的CMOS中，可以通過簡單的命令調用。


 
美國KROHN-HITE3988濾波器，KH3988濾波器，可選功能應用于每個通道：

   雙通道
   截止頻率范圍：0.03Hz至1MHz
   衰減斜率：48dB/八度
   可選擇的過濾器模式：低通和高通
   可選擇的回應：Butterworth和Bessel
   可選擇的預過濾器和后過濾器增益
   可選輸入類型：差分和單端放大器（過濾旁路）模式

KROHN-HITE3988，0.03Hzto1MHz，DualChannel，Butterworth/BesselProgrammableFilter
?TwoChannel
?CutoffFrequencyRange:0.03Hzto1MHz
?AttenuationSlope:48dB/Octave
?FilterModes:Low-PassandHigh-Pass
?Responses:ButterworthandBessel
?Pre-FilterandPost-FilterGains
?InputType:DifferentialandSingle-Ended
?Amplifier(FilterBy-Pass)Mode
?GPIBProgrammable

DESCRIPTIONofKROHN-HITE3988
TheKrohn-HiteModel3988Butterworth/Besseldualchannel
filterisoneofafamilyoffilterscarefullydesignedwiththeuserin
mind，providingeaseofoperation，reliabilityandprice
competitiveness.
The3988providesatunablefrequencyrangefrom0.03Hzto
1MHzinthelow-passmodeand0.03Hzto300kHzinthe
high-passmode.Bothmodesareextendeddownto0.003Hzwith
the002option.Thefrequencyresponsecharacteristiciseither
maximallyflat(Butterworth)forcleanfilteringinthefrequency
domain，orlinearphase(Bessel)toprovidesuperiorpulse
filtering.
Eachchannelofthe3988isan8-pole，widerange，
low-pass/high-passfilteroranamplifierprovidinggainsto70dB
in0.1dBsteps.The3988willacceptinputsignalsof?10Vpeakat
0dBgainandhasselectableacordccoupling.Overloaddetectors
arestandardandassisttheuserindetectinginputsignalsor
incorrectgainsettings.Ninety-ninegroupsofnon-volatile
memoryforstorageoffrontpanelset-upsarestoredin
battery-backedCMOSwhichcanberecalledwithasimple
command.
BAND-PASS/BAND-REJECTOPERATION
WiththeModel3988，theusercansimplyconnecttwochannelsin
seriestoachieveband-passoperationortwoinsummedparallel
forband-rejectoperation.
APPLICATIONS
Applicationsforthe3988areultra-soundmeasurements，random
noisetesting，soundrecording，suppressinginterferenceinaudio
communicationsandrelatedfieldsofmedical，geological，
geophysical，oceanographic，militaryandmore.Allthesefeatures
andmorearebackedwiththequalityKrohn-Hitehasprovidedin
filterssince1949.
SPECIFICATIONS
Specificationsapplyat25°C，±5°C.
FUNCTIONS(EachChannel)
Low-passfilter，high-passfilter，voltagegainamplifier.
FILTERMODE
Type:8-pole，Butterworth/Bessel.
Attenuation:48dB/octave.
TunableFrequencyRangefc:Low-pass，0.03Hzto1MHz
high-pass，0.03Hzto300kHz(option002，0.003Hz).
FrequencyResolution:3digits，0.1Hztomaxfc2digits，
0.03Hzto0.099Hz(option002，1digit，0.003Hzto0.009Hz
2digits，0.01Hzto0.099Hz).
CutoffFrequencyAccuracy:±1%，0.5Hzto50kHz±2%，
50.1kHztomaxfc±5%，0.03Hzto0.5Hz(option002，±5%，
0.003Hzto0.5Hz).
RelativeGainatfc:–3dB，Butterworth–12.6dB，Bessel.
High-PassBandwidth(0dBGain):>4MHz.