National Instruments SCXI-1190/1191 User Manual
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National Instruments SCXI-1190/1191 User Manual

Multiplexer modules for the scxi bus
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SCXI
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SCXI-1190/1191

User Manual

SCXI-1190/1191 User Manual
February 2000 Edition
Part Number 322610A-01

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Summary of Contents for National Instruments SCXI-1190/1191

  • Page 1: User Manual

    SCXI ™ SCXI-1190/1191 User Manual SCXI-1190/1191 User Manual February 2000 Edition Part Number 322610A-01...
  • Page 2 Sweden 08 587 895 00, Switzerland 056 200 51 51, Taiwan 02 2528 7227, United Kingdom 01635 523545 For further support information, see the Technical Support Resources appendix. To comment on the documentation, send e-mail to techpubs@ni.com © Copyright 2000 National Instruments Corporation. All rights reserved.

  • Page 3: Scxi

    Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control.
  • Page 4 Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department of Communications (DOC). Changes or modifications not expressly approved by National Instruments could void the user’s authority to operate the equipment under the FCC Rules.
  • Page 5 • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Canadian Department of Communications This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
  • Page 6 Conventions The following conventions are used in this manual: This icon denotes a note, which alerts you to important information. This icon denotes a caution, which advises you of precautions to take to avoid injury, data loss, or a system crash. This icon denotes a warning, which advises you of precautions to take to avoid being electrically shocked.

  • Page 7: Table Of Contents

    Chapter 2 Using the SCXI-119X Functional Overview...2-1 Safety Instructions ...2-2 RF Switching Precautions...2-3 Contact Protection...2-3 Connecting Signals ...2-4 Multiplexing to RF Sources...2-5 Expanding the RF Multiplexer ...2-6 Appendix A Specifications Appendix B Common Questions © National Instruments Corporation SCXI-1190/1191 User Manual...
  • Page 8 Removing the SCXI-119X ... 1-13 Figure 2-1. SCXI-119X Module Block Diagram... 2-2 Figure 2-2. SCXI-1190 SMB Connectors, SCXI-1191 SMA Connectors ... 2-4 Figure 2-3. Connecting the SCXI-119X ... 2-5 Figure 2-4. Expanding the SCXI-119X ... 2-6 SCXI-1190/1191 User Manual viii www.ni.com...

  • Page 9: Installing And Configuring The Scxi-119X

    SCXI-1190, the maximum rated voltage of the switch is 24 VDC, and the maximum rated current is 1 A at 24 V. For the SCXI-1191, the maximum rated voltage of the switch is 30 VDC, and the maximum rated current is 30 V...

  • Page 10: Figure

    Install the NI-SWITCH software that came on a CD with your SCXI-119X. The CD includes the software required to configure and to program your SCXI-119X module. Insert your National Instruments NI-SWITCH software CD into the CD-ROM drive. Click Install in the installation window that will appear automatically.

  • Page 11: Installing The Scxi-119X Module Into An Scxi Chassis

    2 Slot 2 3 Slot 3 Caution Do not insert the SCXI-119X module into a chassis that is turned on as doing so could damage the module. © National Instruments Corporation Chapter 1 SCXI-119X module SCXI chassis ® 4 Slot 4...

  • Page 12: Connecting The Scxi-119X To A Daq Device Or Computer-Based Instrument

    SCXI-119X Module into an SCXI Chassis SCXI cable assembly, which consists of a cable adapter and a cable An installed National Instruments DAQ device or computer-based instrument that is able to control the SCXI chassis such as the NI 4060 1/4 in.
  • Page 13 To connect the chassis to a DAQ device for multiplexed operation, complete the following steps while referring to Figure 1-2: © National Instruments Corporation Chapter 1 Turn off both the SCXI chassis and the computer that contains the DAQ device or computer-based instrument.

  • Page 14: Connecting The Scxi-119X To A Daq Device In A Pxi Combination Chassis

    Computer-Based Instrument PXI combination chassis with the SCXI modules installed 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...

  • Page 15: Configuration And Self-Test

    PC desktop. This utility allows you to configure and test your National Instruments hardware. Follow these steps to configure your SCXI system: © National Instruments Corporation Chapter 1 Installing the Software Double-click the Measurement & Automation Explorer icon on your PC desktop.

  • Page 16: Auto-Detecting Modules

    Alternatively, try installing the modules manually before taking the troubleshooting measures discussed in the Verification SCXI-1190/1191 User Manual If you have just added the chassis to Devices and Interfaces, you can automatically detect new modules. If the chassis was already listed in Devices and Interfaces, you must manually add new modules.

  • Page 17: Manually Adding Modules

    This device will control the chassis is checked. • If the selected module is not connected to a National Instruments DAQ device or computer-based instrument, select none. • In the Operating Mode box, select Multiplexed Mode.

  • Page 18: Self-Test Verification

    If you experience problems between your SCXI system and your ADE, refer to the Troubleshooting Self-Test Verification section. Additionally, you may find it helpful to refer to your NI-SWITCH documentation, your ADE software documentation, and your chassis documentation. National Instruments documentation is available to download free at www.ni.com/manuals...
  • Page 19 Make sure the cable between the SCXI chassis and DAQ device or computer-based instrument is properly connected. Inspect the cable and the connectors for any bent pins. Make sure you are using the correct National Instruments cable assembly. Test your DAQ device or computer-based instrument to verify it is working properly.

  • Page 20: Removing The Scxi-119X

    Caution Do not remove the SCXI-119X module from a chassis that is turned on as doing so could damage the module. SCXI-1190/1191 User Manual SCXI chassis with the SCXI-119X module(s) installed 1/4 in. flathead screwdriver Remove all signals connected to the SCXI-119X.

  • Page 21: Removing The Scxi-119X From Measurement & Automation Explorer

    2 SCXI Chassis Removing the SCXI-119X from Measurement & Automation Explorer To remove a module from Measurement & Automation Explorer, complete the following steps: © National Instruments Corporation Chapter 1 ® 3 SCXI-119 X (SCXI-1191 Shown) 4 SCXI Module Thumbscrews Figure 1-3.
  • Page 22 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 removed from the list of installed devices in Measurement & Automation Explorer. SCXI-1190/1191 User Manual 1-14 www.ni.com...

  • Page 23: Figure

    DC to 1.3 GHz. Functionally identical, the SCXI-1191 has a bandwidth of DC to 4 GHz. Figure 2-1 illustrates the key functional components of the SCXI-119X multiplexer module. © National Instruments Corporation SCXI-1190/1191 User Manual...

  • Page 24: Safety Instructions

    Do not substitute parts or modify equipment. Because of the danger of introducing additional hazards, do not install unauthorized parts or modify the instrument. Return the instrument to National Instruments for service and repair to ensure that its safety is not compromised.

  • Page 25: Rf Switching Precautions

    SCXI-119X can result in an electrical shock hazard and damage to the switch module and any or all of the modules connected to the SCXI backplane. National Instruments is not liable for any damages or injuries resulting from exceeding maximum voltage ratings.

  • Page 26: Connecting Signals

    The power-up and reset state of the different multiplexer banks are as follows: banks A and C, channel 0 is connected to the COM terminal; banks B and D, channel 3 is connected is connected to the COM terminal. SCXI-1190/1191 User Manual N ATION AL IN STRUMEN TS Figure 2-2.

  • Page 27: Multiplexing 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. RF Source RF Source RF Source RF Source © National Instruments Corporation Chapter 2 N ATION AL IN STRUMEN TS RF Measurement Device • Scopes •...

  • Page 28: Expanding The Rf Multiplexer

    In the specific case 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 insertion loss, creates propagation delays, and may have other RF effects. SCXI-1190/1191 User Manual comD comA comC comB Figure 2-4.

  • Page 29: Specifications

    Maximum switching power per channel ... 24 W Contact on resistance (initial) ... 100 m max Contact material ... Gold-clad silver © National Instruments Corporation Channel to earth ... 24 VDC AC ... 24 V DC ... 24 VDC DC ... 1 A at 24 V AC ...

  • Page 30: Dynamic Characteristics

    SCXI-1190 with high-power signals. Dynamic Characteristics Relay operate time (at 20 C) Relay release time (at 20 C) Expected life SCXI-1190/1191 User Manual ) ...50 100 MHz...<0.4 dB 500 MHz...<0.9 dB 1.3 GHz ...<1.5 dB GHz ...<3 dB 100 MHz...<1.15...

  • Page 31: Power Requirement

    Electromagnetic compatibility Certifications and Compliances CE Mark Compliance See the Declaration of Conformity sheet accompanying product. © National Instruments Corporation Maximum (all relays closed) ... 600 mA (EMC) emissions ... Refer to the document supplied EMI ... FCC Class A compliant...

  • Page 32: Input Characteristics

    Contact material...Gold RF Performance Characteristics Characteristic impedance (Z Insertion loss at: VSWR at: Isolation: Maximum RF carry power SCXI-1190/1191 User Manual Channel to earth...30 V AC...30 V DC...30 VDC DC...30 VDC at 0.33 ADC AC...30 V ) ...50 < 2.5 GHz ...< 0.6 dB <...

  • Page 33: Dynamic Characteristics

    Environment Operating temperature ...0 to 50 C Storage temperature...–20 to 70 C Relative humidity ... 5% to 85% noncondensing Electromagnetic compatibility © National Instruments Corporation Typical ... 15 ms Typical ... 15 ms Mechanical (no load) Electrical at maximum switching capacity... 10 Maximum (all relays closed) ...
  • Page 34 Appendix A Specifications for SCXI-1191 Certifications and Compliances CE Mark Compliance See the Declaration of Conformity sheet accompanying product. SCXI-1190/1191 User Manual www.ni.com...

  • Page 35: Common Questions

    ADE. © National Instruments Corporation 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...
  • Page 36 One of my modules doesn’t switch properly anymore. What’s wrong? One of the relays has probably worn out. Relays are mechanical devices and have a limited switching lifetime. Call National Instruments for information on replacing your relays. What is VSWR, and how does it affect my system? VSWR stands for Voltage Standing Wave Ratio;...

  • Page 37: Technical Support Resources

    Technical Support Resources This appendix describes the comprehensive resources available to you in the Technical Support section of the National Instruments Web site and provides technical support telephone numbers for you to use if you have trouble connecting to our Web site or if you do not have internet access.

  • Page 38: Germany 089 741 31 30, Greece 30 1 42 96 427, Hong Kong 2645 3186, India

    Web sites from If you have trouble connecting to our Web site, please contact your local National Instruments office or the source from which you purchased your National Instruments product(s) to obtain support. For telephone support in the United States, dial 512 795 8248. For...
  • Page 39 Signals can be single-ended or differential. data acquisition © National Instruments Corporation Value –9 –3 SCXI-1190/1191 User Manual...
  • Page 40 See digital multimeter drivers/driver software software that controls a specific hardware device such as a switch card gram hertz—the number of scans read or updates written per second isolation...
  • Page 41 NI-SWITCH an IVI-based instrument driver that supports the National Instruments line of switch cards ounce PCI with extensions for instrumentation radio frequency relay a switch that connects or disconnects the signal to a common through the physical movement of a metal arm root mean square—the square root of the average value of the square of the...
  • Page 42 Glossary volts volts, direct current VSWR Voltage Standing Wave Ratio watts SCXI-1190/1191 User Manual www.ni.com...
  • Page 43 DAQ device. See connecting SCXI-119X to DAQ device. diagnostic resources, online, C-1 dynamic characteristics SCXI-1190, A-2 to A-3 SCXI-1191, A-5 © National Instruments Corporation environment specifications SCXI-1190, A-3 SCXI-1191, A-5 expanding RF multiplexer, 2-6 hardware installation. See installation. input characteristics...
  • Page 44 Index troubleshooting, 1-10 to 1-11 multiplexed operation with DAQ device, 1-5 multiplexer, expanding, 2-6 multiplexing to RF sources, 2-5 National Instruments Web support, C-1 to C-2 NI-SWITCH software, 1-2 online problem-solving and diagnostic resources, C-1 physical specifications SCXI-1190, A-3 SCXI-1191, A-5...
  • Page 45 C-1 to C-2 troubleshooting common problems, B-1 to B-2 © National Instruments Corporation Voltage Standing Wave Ratio (VSWR), B-2 Web support from National Instruments, C-1 to C-2 online problem-solving and diagnostic resources, C-1 software-related resources, C-2 Worldwide technical support, C-2...

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Scxi-1190Scxi-1191

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