National Instruments NI 2590/2591 manuale d’uso

Computer-Based Instruments NI 2590/2591 User Manual NI 2590/2591 User Manual November 2000 Edition Part Number 322387 B-01[...]

Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 794 0100 Worldwide Offices Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 284 5011, Canada (Calgary) 403 274 9391, Canada (Ottawa) 613 233 5949, [...]

Important Information Warranty The NI 2590 and NI 2591 switch modules and accessories are war rante d ag ains t de fec ts i n ma ter ials and wo rkman ship fo r a period of on e year from the date of s hipment, as e videnced by rec eipts or ot her docume ntation. Nat ional Instru ments will, at its option, repair or replace equipment that proves to[...]

Compliance FCC/Canada Radio Frequency Interference Compliance* Determining FCC Class The Federal Communication s Commission (FCC) has rules to protect wireless comm unications from interference. The FCC places digital electronics into two classes. These classes ar e known as Class A (for use in industrial- commercial locations only) or Class B (for[...]

• Connect the equipment into an outlet on a circuit diffe rent from that to which the rec eiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Canadian Depart ment of Communications This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil n[...]

Conventions The follo wing con ventions are used in this manual: < > Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name — for e xample, DBIO<3..0>. This icon denotes a note, which alerts you t o important information. This icon denotes a caution, which advi ses[...]

© National Instruments Corporatio n vii NI 2590/2591 User Manual Contents Chapter 1 Routing Signals with Your NI 2590/2591 About the NI 2590/2591 ................................................................................................ 1-1 Triggers................ .......................... ...................... .......................... [...]

Contents NI 2590/259 1 User Man ual viii ni.com Appendix C Common Questions Appendix D Technical Support Resources Glossary Index[...]

© National Instruments Corporatio n 1-1 NI 2590/2591 User Manual 1 Routing Signals with Y our NI 2590/2591 This manual describes the electrical and mechanical characteristics of the NI 2590, a 1 × 4, 50 Ω , 1.3 GHz multiplexer module, and the NI 2591, a1 × 4, 50 Ω , 4.0 GHz multiplexer module, for the PXI bus. It contains information concern[...]

Chapter 1 Routing Signals with Y our NI 2590/2591 NI 2590/259 1 User Man ual 1-2 ni.com The external trigger input trigger is generated by another instrument or by software and causes the NI 2590/2591 to advance to the next entry in the scan list. The trigger s can be routed to any of the PXI TTL tr iggers or to the P X Is t a rt r i g g e r . Refe[...]

Chapter 1 Ro uting Signals with Y our N I 2590/2591 © National Instruments Corporatio n 1-3 NI 2590/2591 User Manual Connecting Signals The front of the NI 25 90 module has five “ push-on ” SMB connectors for signal connections. The NI 2591 has five SMA female connectors. The center connection, labeled COM, is connected in a through path to on[...]

Chapter 1 Routing Signals with Y our NI 2590/2591 NI 2590/259 1 User Man ual 1-4 ni.com NI 2591 Front Connector The following diagram shows the NI 2591 front connect or. Table 1-1 describes the connector sign als. Figure 1-2. NI 2591 Front Connector Table 1-1. Front Connector Signal Description Signal Name Ty p e Description CH<0..3> Input/Ou[...]

Chapter 1 Ro uting Signals with Y our N I 2590/2591 © National Instruments Corporatio n 1-5 NI 2590/2591 User Manual Software Choices You have several options to choose from when programming your National Instruments switch modul e. You can use the NI-SWITCH driv er software or National Instruments appl ication software. NI-SWITCH Driver Software [...]

Chapter 1 Routing Signals with Y our NI 2590/2591 NI 2590/259 1 User Man ual 1-6 ni.com Third-Party Software The NI-SWITCH instrum ent driver also includes support files for Microsoft Visual C++ and Microsoft Visual Basic. See the NI-SWITCH Software Readme File for version support information. Cabling and Accessor y Requirements National Instrument[...]

© National Instruments Corporatio n 2-1 NI 2590/2591 User Manual 2 NI 2590/2591 Operation This chapter contains safety instructions and a fu nctional overview of the NI 2590/2591 switch modules. It also explains the operation of each functional unit making u p the switch modu le. Safety Instructions Cautions Do not operate dam aged equipm ent. The[...]

Chapter 2 NI 2590/2591 Operation NI 2590/259 1 User Man ual 2-2 ni.com Functional Over view The following block diagrams illustrate the key functi onal components of the NI 2590 and NI 2591 switch modu les. The major components of th e NI 2590/2591 are as follo ws: • General-purpose high-frequency relays • Switch control cir cuitry • Random s[...]

Chapter 2 NI 2590/2591 Operation © National Instruments Corporatio n 2-3 NI 2590/2591 User Manual Figure 2-1. NI 2590 Module Block Diagram CH1 COM CH2 CH0 CH3 F ront Panel T r iggers Scan Memory MUX23 MUX0123 MUX01 Relay Control PXI Interface PXIbus Connector[...]

Chapter 2 NI 2590/2591 Operation NI 2590/259 1 User Man ual 2-4 ni.com Figure 2-2. NI 2591 Module Block Diagram CH1 COM CH2 CH0 CH3 T r iggers PXI Bus Connector High– F requency Relay 4 GHz Relay Module Control Lines Relay Control Scan Memory PXI Interface DECODER F ront Panel[...]

Chapter 2 NI 2590/2591 Operation © National Instruments Corporatio n 2-5 NI 2590/2591 User Manual Relay Operation NI 2590 Operation The NI 2590 has four channels, CH0 through CH3, any on e of which can be connected to the single commo n channel (COM) by closing the appropriate relays. Y ou can control the relays individually , or you can use highe[...]

Chapter 2 NI 2590/2591 Operation NI 2590/259 1 User Man ual 2-6 ni.com Switch Control Circuitr y The switch control circuitr y (SCC) is responsible for opening and closin g relays on the NI 2590/259 1. You can load commands for the SCC into scan memory using the driver software you received with your kit. Consult the online help or your soft ware d[...]

Chapter 2 NI 2590/2591 Operation © National Instruments Corporatio n 2-7 NI 2590/2591 User Manual intervention. Y ou can configure the switch module to process the scan list once or to continuously loop throu gh the scan list. PXI Interface You can configure and control your NI 2 590/2591 switch module through the PXI interface, taking adv antage [...]

Chapter 2 NI 2590/2591 Operation NI 2590/259 1 User Man ual 2-8 ni.com Modes SCANADV has two modes o f operation. In its default m ode, the SCANADV trigger asserts for 1 µs after the relay h as debounced. You can also configure the swit ch module for handshaking mod e, in which the SCANADV trigger goes high after a relay settles, and the SCANADV t[...]

Chapter 2 NI 2590/2591 Operation © National Instruments Corporatio n 2-9 NI 2590/2591 User Manual it possible to wir e external triggers from/to only one switch module in th e system, which simplifies the wiring scheme. Note The NI 2590/2591 does not support triggers on the front p anel connector . If the trigger signal is external to the chassis,[...]

© National Instruments Corporatio n A- 1 NI 2590/2591 User Manual A Specifications This appendix lists the specifications for the NI 2590/25 91 switch module. These specif i cations are typical at 25 ° C unless otherwise note d. NI 2590 Input Characteristics Number of relays .................. .................. 3 Common-mode voltage Channel to e[...]

Appendix A Specifications for NI 2590 NI 2590/259 1 User Man ual A-2 ni.com VSWR at: < 100 MHz ............. ......................... . < 1.15 < 500 MHz ............. ......................... . < 1.35 < 1.3 GHz ........ .......................... ...... < 1.5 Isolation: < 500 MHz ............. ......................... . <[...]

Appendix A Specifications for NI 2590 © National Instruments Corporatio n A- 3 NI 2590/2591 User Manual PXI T rigger Bus Trigger lines ........... ....................... ......... 8 Star trigger................. ...................... ....... 1 Power Requirement +5 VDC Minimum (all relays opened) .......... 350 mA Maximum (all relays closed) . ..[...]

Appendix A Specifications for NI 2591 NI 2590/259 1 User Man ual A-4 ni.com NI 2591 Input Characteristics Number of relays ....... .............. ...............3 Common-mode voltage Channel to earth......................... ...... 30 V rms or DC Maximum switching voltag e AC............ ...................... ..................30 V rms DC.........[...]

Appendix A Specifications for NI 2591 © National Instruments Corporatio n A- 5 NI 2590/2591 User Manual Note Refer to the safety information in Chapter 2, NI 2590/2591 Operation , for important information about using your N I 2591 with high-power signals. Dynamic Characteristics Relay operate time (at 20 ° C) Typical .................. .........[...]

Appendix A Specifications for NI 2591 NI 2590/259 1 User Man ual A-6 ni.com Electromagnetic compatibilit y (EMC) emissions ......................... .... Refer to the document supplied with the chassis for compliance to relevant directives. EMI .......... ......................... ...............FCC Class A compliant Maximum altitude ..............[...]

© National Instruments Corporatio n B- 1 NI 2590/2591 User Manual B Ser vicing Y our Module This appendix describes proced ures for servicing your NI 2590/25 91 module. Replacing the NI 2590 Relay Module The NI 2590 is constructed so that the relay module can be replaced when the relays fail. The life of the relay i s nominally 10 5 operations whe[...]

Appendix B Servicing Y our Module NI 2590/259 1 User Man ual B-2 ni.com Follo w these in structions to replace the failed module as shown in Figure B-1. 1. Ground yourself with a grounding strap o r a ground connected to your PXI chassis. Properly groundi ng yourself prev e nts damage to your PXI module f rom electrostatic discharge. 2. Remov e the[...]

Appendix B Servicing Y our Module © National Instruments Corporatio n B- 3 NI 2590/2591 User Manual Figure B-2. RF 2591 Replacement Relay Module Follo w these in structions to replace the failed module as shown in Figure B-2. 1. Ground yourself with a g rounding strap or a grou nd connected to your PXI chassis. Properly grounding yourself pre vent[...]

© National Instruments Corporatio n C- 1 NI 2590/2591 User Manual C Common Questions This appendix addresses common questions you may hav e while using your NI 2590/2591 switch module. What should I do if the software detects the module but the switches do not switch? V erify that the switches do not switch. Close your application program and then[...]

Appendix C Common Questions NI 2590/259 1 User Man ual C-2 ni.com Finally , verify that your code is correct. For reference, see the examples described in the NI-SWITCH Software User M anual . The NI-Swi tch dri ver also ships with sev eral examples in source code. Compare your algorithm to the ones in the examples. Do I need to program the switch [...]

© National Instruments Corporatio n D-1 NI 2590/2591 User Manual D T echnical Support Resources W eb Support National Instruments W eb support is your first stop for help in solving installation, configuration, and application pro blems and questions. O nline problem-solving and di agnostic resources include frequ ently asked questions, knowledge [...]

Appendix D T echnical Support Resources NI 2590/259 1 User Man ual D-2 ni.com W orldwide Support National Instruments has of fices located around the world to help address your support needs. Y ou can access our branch of fice W eb sites from the W orldwide Of fices section of ni.com . Branch off ice W eb sites provide up-to-date contact informatio[...]

© National Instruments Corporatio n G-1 NI 2590/2591 User Manual Glossar y Pref ix Meaning V alue p- pico- 10 – 12 n- nano- 10 – 9 µ- micro- 10 – 6 m- milli- 10 – 3 M- mega- 10 6 G- giga- 10 9 Numbers and Symbols ° degrees Ω ohms % percent > greater than < less than A A amperes A C alternating current ADC amperes direct current A[...]

Glossary NI 2590/259 1 User Man ual G-2 ni.com B breakpoint a specified point in program cod e where the program pau ses to perform some action; a breakpoint interrupt can be add ed to a scan list for debugging or o ther special needs. bus the group of conductors that in terconnect individual circuitry in a computer . T ypically , a bus is the expa[...]

Glossary © National Instruments Corporatio n G-3 NI 2590/2591 User Manual F flyback voltage the voltage spike generated the instant current stops flo wi ng through an inductor H handshaking the use of two trigger lines between two instruments, such as a switch and a DMM, to synchronize th eir actions Hz hertz — the number of scans read or update[...]

Glossary NI 2590/259 1 User Man ual G-4 ni.com R random scanning scanning the channels in a mux in any order reflecti ve switch a switch architecture in which the unused channels are NO T terminated in the characteristic impedance of the syst em. The unused channels are open circuits. relay a switch that connects or disconnects the si gnal to a com[...]

Glossary © National Instruments Corporatio n G-5 NI 2590/2591 User Manual V V volts v aristor an electrical resistor whose resistance depends on the applied v oltage VDC volts, direct current VI virtual instrument — (1) a combination of hardware and/or softw are elements, typically used with a PC, that has the functionality of a classic stand-al[...]

© National Instruments Corporatio n I-1 NI 2590/2591 User Manual Index B block diagrams NI 2590, 2-3 NI 2591, 2-4 C cables and accessories, 1-6 certification and comp liances NI 2590, A-3 NI 2591, A-6 CH<0..3> signal (table), 1-4 COM signal (table), 1-4 common questions ab out NI 2590/25 91, C - 1t oC - 2 connectors front connector NI 2590 ([...]

Index NI 2590/259 1 User Man ual I-2 ni.com contact protection, 1-2 front connectors (figur es), 1-3 to 1-4 overview, 1-1 parts locator diagram NI 2590, B-1 NI 2591, B-3 replacing relay module NI 2590, B-1 to B-2 NI 2591, B-2 to B-3 RF switching precautions, 1-2 s e r v i c i n g ,B - 1t oB - 3 software choices, 1-5 to 1-6 triggers, 1-1 to 1-2 NI D[...]

Index © National Instruments Corporatio n I-3 NI 2590/2591 User Manual S safety instructions, 2-1 scanner advanced trigger modes of operation, 2-8 overview, 1-1 purpose and use, 2-7 scanning common questions, C-1 to C-2 initiating, 2-8 random scanning, 2-6 to 2-7 servicing the NI 2590/25 91, B-1 to B-3 parts locator diagram NI 2590, B-1 NI 2591, B[...]