krohnhite 34AData 电路图.pdf
DESCRIPTION The Model 34A dual channel, Butterworth/Bessel, plug-in filter card is one of a family of filter cards used in Krohn-Hite Programmable Filter System Mainframe Chassis. It was carefully designed with the user in mind, providing ease of operation, reliability?and?price?competitiveness. FEATURES The 34A provides a tunable cutoff frequency range from 3Hz to 2MHz, with a frequency response characteristic of maximallyflat (Butterworth)forcleanfilteringinthefrequencydomain,orlinear phase (Bessel) to provide superior pulse or complex signal filtering. The passband gain is unity (standard on all Krohn-Hite filters),?and?the?attenuation?slope?is?24dB/octave?per?channel. The filter can be programmed to operate in the low-pass, high-pass, band-pass, band-reject or by-pass modes; or the two channelscanbeexternallyinterconnected toachieve48dB/octave high-pass or low-pass slopes. The 34A also offers input and output?gains?of?0dB?or?20dB. MAINFRAME?CHASSIS The34Aisaplug-infiltercardfortwomainframechassis;Models 3905B/3905C and 3916B. The 3905B/C is a 3.5 high chassis, allowing up to 5 filter/amplifiercards. The 3916B allows up to 16 cards.WiththeModel34A,thisallowstheusertoconfigureeither a?10?channel?or?32?channel?filter?system. Krohn-Hite?Corporation,?15?Jonathan?Drive,?Unit?4,?Brockton,?MA?02301Page?1?of?2 Tel:?508-580-1660;?Fax:?508-583-8989;?www.krohn-;?email:?saleskrohn-34AData.vp “Quality”?in?Test?and?Measurement?Since?1949 DC?Source/Calibrators,?Tunable?Electronic?Filters, Wideband?Power?Amplifiers Precision?Phasemeters,?Distortion?Analyzers Function?Generators,?RC?Oscillators Model?34A Dual?Channel?Butterworth/Bessel Plug-In?Filter?Card Cutoff?Frequency?Range: 3Hz?to?2MHz Attenuation: 24dB/Octave Functions: LP/HP/BP/BR Selectable?Filter?Types: Butterworth?and?Bessel Selectable?Input?Gain: 0dB?or?20dB Selectable?Output?Gain: 0dB?or?20dB Stopband?Attenuation: 95dB RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS Specifications?apply?at?25C,?5C. FILTER?CHARACTERISTICS Functions:Twoindependentchannelsoflow-pass, high-pass or bypass. One channel of band-pass or band-reject. Type: 4-pole?Butterworth?(maximally?flat) 4-pole?Bessel?(linear?phase). Frequency?Range?(fc): 3Hz?to?2MHz. Frequency Resolution: 1Hz from 3Hz to 1kHz; 10Hz to 2kHz;?100Hz?to?100kHz;?1kHz?to?1MHz;?10kHz?to?2MHz. Frequency Accuracy (fc): 2% or least significant digit (which?ever?is?greater)?20Hz?to?500kHz;?5%?to?2MHz. Relative?Gain?at?fc: Butterworth: 3dB. Bessel: 7.58dB. Bandwidth: dc to fc, dc coupled; 0.2Hz to fc, ac coupled (low-pass);?fc?to?10MHz?(high-pass). Attenuation: 24dB/octave?per?channel. Stopband?Attenuation: 80dB. InsertionLoss(0dBInput/Outputgain):0.5dBto2MHz. INPUT?CHARACTERISTICS Gain?(pre-filter): 0dB?or?20dB?0.2dB. Coupling: ac?or?dc. Impedance: 1M?ohm?in?parallel?with?100pf. Maximum Signal ?(at 0dB gain): 4.5V peak at fc <1MHz; 4V?peak?at?2MHz. Maximum?DC?Component: 200V?in?ac?coupled?mode. OUTPUT?CHARACTERISTICS Impedance: 50?ohms. Gain?(post-filter): 0dB?or?20dB?0.2dB. Maximum Voltage: 6.5V peak into 500 ohms; 1.3V peak?into 50?ohms. Maximum?Current: 25mA. Distortion: 80dB?at?1kHz?at?1Vrms. Noise: <200V?with?2MHz?bandwidth?detector. DC?Offset: adjustable?to?0V. DC?Stability: Typically?0.5mV/C;?1mV/C?max. GENERAL Input/Output?Connectors: BNC. Weights: 1.75?lbs?(0.8kg). Accessories: Operating?manual. OPTIONS 002: Lowers?cutoff?range?to?0.3Hz?to?200kHz. Extended?1?Year?Warranty: Part?No.?EW34A. Specifications?subject?to?change?without?notice. NOTE: Model 34A Series plug-in filter/amplifier cards must be?used?with?3905B/3905C?or?3916B/3916C?chassis. DualChannel Butterworth/Bessel Plug-InFilterCardModel34A Krohn-Hite?Corporation,?15?Jonathan?Drive,?Unit?4,?Brockton,?MA?02301Page?2?of?2 Tel:?508-580-1660;?Fax:?508-583-8989;?www.krohn-;?email:?saleskrohn-34AData.vp RadioFans.CN 收音机爱 好者资料库
