krohnhite 39CHData 电路图.pdf

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1、DESCRIPTION The Models 3905C and 3916C are Programmable Multi-channel Filter Systems which can be configured with many types of filter cards; Elliptical filters for anti-aliasing, Butterworth filters for clean filtering in the frequency domain, and Bessel filters which provide superior or pulse or c

2、omplex signal filtering. Filter cards that provide selectable frequency cutoffs as low as 0.01Hz and as high as 25.6MHz with roll-off rates of 24dB to 115dB/octave makeeach Systemunique to any application. The Systemconcept was designed with the user in mind, providing ease of operation, flexibility

3、?and?performance. SYSTEM?CONFIGURATIONS Two mainframes are available, the Model 3905C and the Model 3916C. The 3905C accommodates up to 5 plug-in filter cards in only3ofrackspacing.Bothfrontandrearpanelinputandoutput BNC connectors are standard, permittingconvenient bench top or rack mounting use. T

4、he 3916B accommodates up to 16 plug-in filter cards for the larger system user; and used with the Model 34A filter card will give the user a maximum of 32 channels of filtering in one mainframe. Changing or adding cards to either mainframe?is?accomplished?with?no?modifications?to?the?System. mainfra

5、meincorporatesanGPIBinterface,forremote programming,powersupply,microprocessor,frontpanel keyboard,?displays?and?indicators.?Extra?large,?independent keyboard, displays and indicators. Extra large, independent displays are provided for input and output gain, cutoff frequency, channel selection and o

6、verload detection. These independent displayspresentallthemostpertinentinformationsimultaneously for?maximum?operator?convenience. ADDITIONAL?FEATURES Overload detectors assist the user in detecting excessive input signals or incorrect gain settings with some filter cards. There are three selectable

7、 modes: non-latching, that monitors all channels and displays the first channel to have an overload; latching, that maintains the overload display until the overload is cleared; and no?indication. The System also provides an “amplifier only” or “by-pass” mode for applications that require no filteri

8、ng of the input signal. In the amplifieronlymode,boththeinputandoutputgainsareavailable, by-passing the filtering circuits, giving the user the ability to amplifyvery low signals if desired. In the by-pass mode,the input is connected to the output, by-passing the amplifier and filtering circuits. Th

9、e next few pages give detailed specifications of each filter card available for the Model 3905C and 3916C, along with a wide range?of?applications?each?System?will?provide. Krohn-Hite?Corporation,?15?Jonathan?Drive,?Unit?4,?Brockton,?MA?02301Page?1?of?2 Tel:?508-580-1660;?Fax:?508-583-8989;?www.kroh

10、n-;?email:?saleskrohn-39CHData.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?3905C/3916C Plug-In?Filter?Card?Chassis Filter?Types: Elli

11、ptical,?Butterworth?and?Bessel Roll-Off?Rates: up?to?115dB/Octave 5?or?16?Plug-In?Filter?Cards Non-Volatile?Memory Input?and?Output?Gain All?Channel?Mode Amplify?Only?and?By-Pass?Modes Fully?GPIB?Programmable Overload?Detectors Power-Up?Self-Test RadioFans.CN 收音机爱 好者资料库 CHASSIS?SPECIFICATIONS Specif

12、ications?apply?at?25C?5C. Capacity: Model?3905C: 5?plug-in?filter?cards. Model?3916C: 16?plug-in?filter?cards. Memory: Memory?is?non-volatile,?battery-backed?CMOS. Model?3905C: 85?selectable?storage?locations?for complete?instrument?operating?conditions. Model?3916C: 25?selectable?storage?locations?

13、for complete?instrument?operating?conditions. Overload Modes: Three selectable modes; non-latching, monitors all channels and displays the first channel to have an overload; latching, maintains the overload display until it is?cleared,?and?no?indication. Overload Indicators: LEDs for input and outpu

14、t. Gain displayflasheswhenoverloadoccurs ondisplayedchannel. Self-Test Diagnostics: Microprocessor checks unit upon power-up.?Display?indicates?failure?mode. Displays: 7?segment,?green?LED;?0.5?high. Remote Programming: IEEE-488.1 interface. Subsets: SH1,?AH1,?T6,?L4,?SR1,?RL1,?PP1,?DC1,?DT0,?C0,?E1

15、. Operating?Temperature: 0C?to?45C. Isolation?to?Chassis: 200Vdc. Storage?Temperature: 20C?to?70C. Power?Requirements: 90-132,180-264?volts?ac,?50-60Hz. Model?3905C: 20?watts. Model?3916C: 25?watts. Dimensions?and?Weights: Model?3905C: 3.5?(9cm)?high,?17.25?(43.8cm)?wide, 18.38?(50.2cm)?deep;?10?lbs

16、?(4.6kg). Model?3916C: 8.75?(22.1cm)?high,?17?(43.2cm) wide,?19.5?(49.6cm)?deep;?31?lbs?(14kg). Add?1.75?lbs?(0.8kg)?for?each?filter?card. Accessories: 6foot,3terminallinecord,operatingmanual. OPTIONS Rack Mounting Kit: Permits the installation of the Model 3905B?and?3916C?into?a?standard?19?rack?sp

17、acing. Model?3905C: Part?no.?RK-317. Model?3916C: Part?no.?RK-817,?includes?rack?mount slides. FilterExtender Card: PartNo.39AMEFilterExtenderCard permits any filter card to be extended from the mainframe during?calibration?or?repair. Extended 1 Year Warranty: Part No. (3905C) EW3905C, (3916C)?EW391

18、6C. OPTIONAL?ACCESSORIES CAB-010: GPIB?Cable?with?Connectors,?2-Meters CAB-011: GPIB?Cable?with?Connectors,?1-Meters CAB-025: Cable,?BNC,?3ft,?Low?Noise Specifications?subject?to?change?without?notice. Plug-InFilterCardChassisModel3905C/3916C 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-39CHData.vp Model?3905C?Rear?Panel?View Model?3916C?Rear?Panel?View RadioFans.CN 收音机爱 好者资料库