National Instruments SCXI-1190/1191 Скачать руководство пользователя страница 35 | Manualshive

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National Instruments SCXI-1190/1191 Скачать руководство пользователя страница 35

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National Instruments Corporation

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SCXI-1190/1191 User Manual

B

Common Questions

This appendix addresses common questions you may have while using
your SCXI-119X multiplexer module.

The SCXI-1190 is listed to have a 1.3 GHz bandwidth. Can I use it at
2 GHz bandwidth?

The SCXI-1190 can definitely be used at 2 GHz, as long as the isolation,
VSWR, and attenuation levels are acceptable for your particular
application. Refer to Appendix A,

Specifications

, for a complete list of the

parameters at 2 GHz.

What should I do if the software detects the module but the switches do
not switch?

•

Verify that the switches do not switch by trying to close and open the
switches. You can verify the switches’ functionality by using the
NI-SWITCH front panel. Access the front panel by clicking on
Start»Programs»National Instruments Switch»NI-Switch Soft
Front Panel.

•

Also be sure to check the return codes of the NI-SWITCH operation to
ensure that there are no errors (negative value) or warnings (positive
value).

•

Finally, verify that your code is correct. For reference, see the
examples described in the NI-SWITCH Software User Manual.
The NI-SWITCH driver ships with several examples in source code.
Compare your algorithm to those in the examples.

Do I need to program the switch module myself?

The SCXI-119X comes with the NI-SWITCH driver software, which
exports the full functionality of the module. NI-SWITCH handles the
complex issues of direct memory access, interrupts, and operating system
interfacing for you. All you need to do is make high-level calls to these
functions from your ADE.

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Содержание SCXI-1190/1191

Страница 1: ...SCXI SCXI 1190 1191 User Manual SCXI 1190 1191 User Manual February 2000 Edition Part Number 322610A 01...

Страница 2: ...ermany 089 741 31 30 Greece 30 1 42 96 427 Hong Kong 2645 3186 India 91805275406 Israel 03 6120092 Italy 02 413091 Japan 03 5472 2970 Korea 02 596 7456 Mexico D F 5 280 7625 Mexico Monterrey 8 357 769...

Страница 3: ...or service failures caused by owner s failure to follow the National Instruments installation operation or maintenance instructions owner s modification of the product owner s abuse misuse or negligen...

Страница 4: ...ommunications DOC Changes or modifications not expressly approved by National Instruments could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Co...

Страница 5: ...Directives Readers in the EU EEC EEA must refer to the Manufacturer s Declaration of Conformity DoC for information pertaining to the CE Mark compliance scheme The Manufacturer includes a DoC for most...

Страница 6: ...ence or an introduction to a key concept This font also denotes text that is a placeholder for a word or value that you must supply monospace Text in this font denotes text or characters that you shou...

Страница 7: ...I Combination Chassis 1 6 Configuration and Self Test 1 7 Auto Detecting Modules 1 8 Manually Adding Modules 1 9 Self Test Verification 1 10 Troubleshooting Self Test Verification 1 10 Removing the SC...

Страница 8: ...119X into an SCXI Chassis 1 3 Figure 1 2 Connecting an SCXI Chassis to a DAQ Device or Computer Based Instrument 1 6 Figure 1 3 Removing the SCXI 119X 1 13 Figure 2 1 SCXI 119X Module Block Diagram 2...

Страница 9: ...SCXI 119X uses single pole double throw high bandwidth relays capable of switching signals from DC to 1 3 GHz bandwidth SCXI 1190 and from DC to 4 GHz bandwidth SCXI 1191 The characteristic impedance...

Страница 10: ...r use with an SCXI chassis Caution Make sure you read and understand all the safety information in this manual before you install an SCXI module Unpacking Your SCXI 119X module is shipped in an antist...

Страница 11: ...he SCXI 119X into an SCXI Chassis 1 Turn off the computer that contains the DAQ device or computer based instrument or disconnect the computer from your SCXI chassis 2 Turn off the SCXI chassis Cautio...

Страница 12: ...evice or Computer Based Instrument You need the following items SCXI chassis with the SCXI modules installed Refer to the Installing the SCXI 119X Module into an SCXI Chassis section SCXI cable assemb...

Страница 13: ...device or computer based instrument See your cable assembly s installation guide for more specific information 3 Connect the cable to the back of the cable adapter ensuring that the cable fits securel...

Страница 14: ...National Instruments PXI MIO DAQ device or a computer based instrument that is capable of controlling SCXI installed in the right most slot of the PXI section of the combination chassis A PXI combina...

Страница 15: ...SCXI system 1 Double click the Measurement Automation Explorer icon on your PC desktop Click the next to Devices and Interfaces If you are adding new modules to an existing chassis go to step 4 If you...

Страница 16: ...sis which you should connect to the computer using a serial port cable Before auto detecting modules refer to the Connecting the SCXI 119X to a DAQ Device or Computer Based Instrument section To auto...

Страница 17: ...he appropriate physical installation slot and select Insert Note When looking at the front of the SCXI chassis slot 1 is the left most slot 5 Select the module installed in that slot and click Next No...

Страница 18: ...ssage The chassis has been verified appears Click OK If the communication test is unsuccessful refer to the Troubleshooting Self Test Verification section Your SCXI system should now operate properly...

Страница 19: ...for more information 3 If you get the warning message Failed to find followed by module codes and then the message Instead found module with ID 0Xxx return to the Connecting the SCXI 119X to a DAQ De...

Страница 20: ...documentation for your SCXI or PXI if you are using a combination chassis chassis and accessories for additional instructions and warnings To remove the SCXI 119X module from an SCXI chassis follow t...

Страница 21: ...sktop 2 Display the list of installed devices and interfaces by clicking the next to Devices and Interfaces 3 Locate the chassis in the list of installed devices Display the list of modules in the cha...

Страница 22: ...al 1 14 www ni com Note Deleting an SCXI chassis deletes all modules in the chassis All configuration information for these modules is also lost Your SCXI chassis and or SCXI module s should now be re...

Страница 23: ...tiplexer module Functional Overview The SCXI 119X modules are general purpose quad 4 channel high bandwidth multiplexing switches The SCXI 1190 uses single pole double throw high bandwidth relays capa...

Страница 24: ...epair to ensure that its safety is not compromised Do not operate this instrument in a manner that contradicts the information specified in this document Misuse of this instrument could result in a sh...

Страница 25: ...nd 30 Vrms or DC for the SCXI 1191 Any connections that exceed the maximum voltage for the SCXI 119X can result in an electrical shock hazard and damage to the switch module and any or all of the modu...

Страница 26: ...n SMA connectors as shown in Figure 2 2 Figure 2 2 SCXI 1190 SMB Connectors SCXI 1191 SMA Connectors Note The power up and reset state of the different multiplexer banks are as follows banks A and C c...

Страница 27: ...ing to RF Sources Figure 2 3 shows how to use the SCXI 119X to select one of four RF sources to be routed to a RF measurement device Figure 2 3 Connecting the SCXI 119X RF Source 1 RF Source 2 RF Sour...

Страница 28: ...of Figure 2 4 the module is used to create a 13 to 1 multiplexer with a two stage architecture You can cascade several modules to provide even larger multiplexers Cascading multiplexers increases ins...

Страница 29: ...are typical at 25 C unless otherwise noted SCXI 1190 Input Characteristics Number of relays per bank 3 Number of banks 4 Common mode voltage Channel to earth 24 VDC Maximum switching voltage AC 24 Vrm...

Страница 30: ...ation 500 MHz 62 dB 1 3 GHz 50 dB 2 GHz 30 dB Rise time 300 ps Signal delay 3 ns Maximum RF carry power at 900 MHz 10 W Note Refer to the cautions and warning in Chapter 2 Using the SCXI 119X for impo...

Страница 31: ...nsions 17 30 by 19 56 by 3 02 cm 6 81 by 7 70 by 1 19 in I O connector 5 SMB female per bank Environment Operating temperature 0 to 50 C Storage temperature 20 to 70 C Relative humidity 5 to 85 noncon...

Страница 32: ...voltage AC 30 Vrms DC 30 VDC Maximum switching capacity per channel DC 30 VDC at 0 33 ADC AC 30 Vrms at 0 33 Arms Maximum switching power per channel 10 W Contact on resistance initial 200 m max Conta...

Страница 33: ...perations Electrical at maximum switching capacity 105 operations Caution Exceeding the maximum switching capability will decrease the expected life of the SCXI 1191 Power Requirement 5 VDC Maximum al...

Страница 34: ...Appendix A Specifications for SCXI 1191 SCXI 1190 1191 User Manual A 6 www ni com Certifications and Compliances CE Mark Compliance See the Declaration of Conformity sheet accompanying product...

Страница 35: ...itches functionality by using the NI SWITCH front panel Access the front panel by clicking on Start Programs National Instruments Switch NI Switch Soft Front Panel Also be sure to check the return cod...

Страница 36: ...transmission line The percentage of a signal reflected back to the source is equal to VSWR 1 VSWR 1 This means that a VSWR of 1 is optimum with no reflected signal On higher power applications a larg...

Страница 37: ...ns FAQs and their corresponding answers or solutions including special sections devoted to our newest products The database is updated daily in response to new customer experiences and feedback Troubl...

Страница 38: ...nformation on local services You can access these Web sites from www ni com worldwide If you have trouble connecting to our Web site please contact your local National Instruments office or the source...

Страница 39: ...ls degrees ohms percent A A amperes AC alternating current ADE application development environment such as LabVIEW LabWindows CVI Visual Basic and C or C C C Celsius channel pin or wire lead on the mu...

Страница 40: ...requency temperature and so on DMM See digital multimeter drivers driver software software that controls a specific hardware device such as a switch card G g gram H Hz hertz the number of scans read o...

Страница 41: ...or disconnects the signal to a common through the physical movement of a metal arm rms root mean square the square root of the average value of the square of the instantaneous signal amplitude a meas...

Страница 42: ...Glossary SCXI 1190 1191 User Manual G 4 www ni com V V volts VDC volts direct current VSWR Voltage Standing Wave Ratio W W watts...

Страница 43: ...connecting SCXI 119X to DAQ device diagnostic resources online C 1 dynamic characteristics SCXI 1190 A 2 to A 3 SCXI 1191 A 5 E environment specifications SCXI 1190 A 3 SCXI 1191 A 5 expanding RF mul...

Страница 44: ...4 to A 6 RF sources multiplexing to 2 5 RF switching precautions 2 3 S safety instructions 2 2 to 2 3 SCXI chassis installing SCXI 119X into 1 3 to 1 4 removing SCXI 119X from 1 12 to 1 13 SCXI 119X b...

Страница 45: ...cteristics A 4 physical A 5 power requirement A 5 RF performance characteristics A 4 to A 6 T technical support resources C 1 to C 2 troubleshooting common problems B 1 to B 2 V Voltage Standing Wave...

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