National Instruments NI 783xR, User Manual

Page 1: ...Reconfigurable I O NI 783xR User Manual Reconfigurable I O Devices for PCI PXI CompactPCI Bus Computers NI 783xR User Manual May 2005 370489C 01 ...

Page 2: ...ea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 095 783 68 51 Singapore 1800 226 5886 Slovenia 386 3 425 4200 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 200 51 51 Taiwan 886 02...

Page 3: ... misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior wri...

Page 4: ...nt of Communications DOC Changes or modifications not expressly approved by NI could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Commission This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against ha...

Page 5: ...esources 1 4 Device Embedded Logic and Processing 1 4 Reconfigurable I O Architecture 1 4 Reconfigurable I O Applications 1 5 Software Development 1 5 LabVIEW FPGA Module 1 5 LabVIEW Real Time Module 1 6 Cables and Optional Equipment 1 7 Custom Cabling 1 8 Safety Information 1 9 Chapter 2 Hardware Overview of the NI 783xR NI 7830R Overview 2 2 NI 7831R 7833R Overview 2 2 Analog Input 2 2 Input Mod...

Page 6: ...nal Sources NRSE Input Mode 2 12 Common Mode Signal Rejection Considerations 2 13 Analog Output 2 14 Connecting Analog Output Signals 2 14 Digital I O 2 15 Connecting Digital I O Signals 2 15 RTSI Trigger Bus 2 18 PXI Local Bus for NI PXI 783xR only 2 19 Switch Settings 2 20 Power Connections 2 23 Field Wiring Considerations 2 24 Chapter 3 Calibration Loading Calibration Constants 3 1 Internal Cal...

Page 7: ...es you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on the device refer to the Safety Information section of Chapter 1 Introduction for precautions to take bold Bold text denotes items that you must select or click in the software such as menu items and dialog box options Bold text also denotes parameter names and hardware labels italic Italic text ...

Page 8: ...ts LabVIEW Module Documents LabVIEW FPGA Release Notes to view this document LabVIEW FPGA Module User Manual This manual describes how to use the LabVIEW FPGA Module to create virtual instruments VIs that run on the NI 783xR Select Start Program Files National Instruments LabVIEW Module Documents FPGA User Interface to view this document FPGA Interface User Guide This manual describes how to contr...

Page 9: ...Documentation The following documents contain information you might find helpful NI Developer Zone tutorial Field Wiring and Noise Considerations for Analog Signals at ni com zone PICMG CompactPCI 2 0 R3 0 PXI Hardware Specification Revision 2 1 PXI Software Specification Revision 2 1 ...

Page 10: ...R The FPGA on the R Series device allows you to define the functionality and timing of the device You can change the functionality of the FPGA on the R Series device in LabVIEW using the LabVIEW FPGA Module to create and download a custom virtual instrument VI to the FPGA Using the FPGA Module you can graphically design the timing and functionality of the R Series device If you only have LabVIEW b...

Page 11: ...ple the RTSI bus on the R Series device is available in a PXI chassis but not in a CompactPCI chassis The CompactPCI specification permits vendors to develop sub buses that coexist with the basic PCI interface on the CompactPCI bus Compatible operation is not guaranteed between CompactPCI devices with different sub buses nor between CompactPCI devices with sub buses and PXI The standard implementa...

Page 12: ... application requirements and to mimic the functionality of fixed I O devices For example you can configure an R Series device in one application for three 32 bit quadrature encoders and then reconfigure the R Series device in another application for eight 16 bit event counters You also can use the R Series device with the LabVIEW Real Time Module in timing and triggering applications such as cont...

Page 13: ...ematical operations You can implement multiple functions efficiently in the same design operating sequentially or in parallel You also can implement more complex algorithms such as control loops You are limited only by the size of the FPGA Reconfigurable I O Architecture Figure 1 1 shows an FPGA connected to fixed I O resources and a bus interface The fixed I O resources include A D converters ADC...

Page 14: ...ting almost immediately after power up instead of waiting for the computer to completely boot and load the FPGA Refer to the LabVIEW FPGA Module User Manual for more information about how to store your VI in Flash memory Reconfigurable I O Applications You can use the LabVIEW FPGA Module to create or acquire new VIs for your application The FPGA Module allows you to define custom functionality for...

Page 15: ...lity is installed by the NI RIO CD You also can use the utility to configure the analog input mode to synchronize the clock on the R Series device to the PXI clock for NI PXI 783xR only and to configure when the VI loads from Flash memory LabVIEW Real Time Module The LabVIEW Real Time Module extends the LabVIEW development environment to deliver deterministic real time performance You can write ho...

Page 16: ...0 050 series D type connector The cable is constructed with 34 twisted wire pairs and an overall shield MIO or DIO Connects to the following standard 68 pin screw terminal blocks SCB 68 CB 68LP CB 68LPR TBX 68 SHC68 68 RMIO Shielded 68 pin VHDCI male connector to female 0 050 series D type connector The cable is constructed with individually shielded twisted pairs for the analog input channels plu...

Page 17: ...rom 68 pin VHDCI male connector to two 26 pin female headers plus one 50 pin female header The pinout of these headers allows for direct connection to 5B backplanes for analog signal conditioning and SSR backplanes for digital signal conditioning MIO only 26 pin headers can connect to the following 5B backplanes for analog signal conditioning 5B08 8 channel 5B01 16 channel 50 pin header can connec...

Page 18: ... flammable gases or fumes If you must operate the NI 783xR in such an environment it must be in a suitably rated enclosure If you need to clean the NI 783xR use a soft nonmetallic brush Make sure that the NI 783xR is completely dry and free from contaminants before returning it to service Operate the NI 783xR only at or below Pollution Degree 2 Pollution is foreign matter in a solid liquid or gase...

Page 19: ...tion system This category refers to local level electrical distribution such as that provided by a standard wall outlet for example 115 V for U S or 230 V for Europe Examples of Installation Category II are measurements performed on household appliances portable tools and similar products Measurement Category III Measurements performed in the building installation at the distribution level This ca...

Page 20: ...7830R Block Diagram AI AI PCI PXI CompactPCI Bus Input Mux Instrumentation Amplifier Input Mode Mux AISENSE AIGND 16 Bit DAC x4 Channels 2 x4 Channels Configuration Flash Memory User Configurable FPGA on RIO Devices Bus Interface Connector 1 DIO Data Address Control Digital I O 16 Digital I O 40 Calibration DACs Configuration Control Connector 0 MIO Calibration DACs Voltage Reference 16 Bit ADC Te...

Page 21: ...ually for input or output Analog Input You can sample NI 783xR AI channels simultaneously or at different rates The input mode is software configurable and the input range is fixed at AI AI PCI PXI CompactPCI Bus Input Mux Instrumentation Amplifier Input Mode Mux AISENSE AIGND 16 Bit DAC x8 Channels 2 x8 Channels Configuration Flash Memory User Configurable FPGA on RIO Devices Bus Interface Connec...

Page 22: ... scale range 10 000000 8000 Any input voltage Table 2 2 Available Input Modes for the NI 783xR Input Mode Description DIFF When the NI 783xR is configured in DIFF input mode each channel uses two AI lines The positive input pin connects to the positive terminal of the onboard instrumentation amplifier The negative input pin connects to the negative input of the instrumentation amplifier RSE When t...

Page 23: ...ach channel is internally connected to AIGND In NRSE input mode the AISENSE signal is connected internally to the negative input of the instrumentation amplifier for each channel In DIFF and RSE input modes AISENSE is not used Caution Exceeding the differential and common mode input ranges distorts the input signals Exceeding the maximum input voltage rating can damage the NI 783xR and the compute...

Page 24: ...input signals The amplifier output voltage is referenced to the device ground The NI 783xR ADC measures this output voltage when it performs A D conversions You must reference all signals to ground either at the source device or at the NI 783xR If you have a floating source reference the signal to ground by using RSE input mode or the DIFF input mode with bias resistors Refer to the Differential C...

Page 25: ... common mode input range Ground Referenced Signal Sources A ground referenced signal source is connected to the building system ground so it is already connected to a common ground point with respect to the NI 783xR assuming that the computer is plugged into the same power system Instruments or devices with nonisolated outputs that plug into the building power system are ground referenced signal s...

Page 26: ...loop losses Vg are added to measured signal NOT RECOMMENDED V1 AI i AI i AIGND i V1 AI i AI i AIGND i See text for information on bias resistors Signal Source Type Floating Signal Source Not Connected to Building Ground Grounded Signal Source Examples Ungrounded Thermocouples Signal Conditioning with Isolated Outputs Battery Devices Examples Plug in Instruments with Nonisolated Outputs Input Diffe...

Page 27: ...al input connections for any channel that meets any of the following conditions The input signal is low level less than 1 V The leads connecting the signal to the NI 783xR are greater than 3 m 10 ft The input signal requires a separate ground reference point or return signal The signal leads travel through noisy environments Differential signal connections reduce noise pickup and increase common m...

Page 28: ...de noise pickup in the leads connecting the signal sources to the device The instrumentation amplifier can reject common mode signals when V in and V in input signals are both within their specified input ranges Refer to Appendix A Specifications for more information about input ranges Differential Connections for Nonreferenced or Floating Signal Sources Figure 2 6 shows how to connect a floating ...

Page 29: ...ource impedances this connection leaves the differential signal path significantly out of balance Noise that couples electrostatically onto the positive line does not couple onto the negative line because it is connected to ground Hence this noise appears as a differential mode signal instead of a common mode signal and the instrumentation amplifier does not reject it In this case instead of direc...

Page 30: ...f the source has high output impedance balance the signal path as previously described using the same value resistor on both the positive and negative inputs Loading down the source causes some gain error Single Ended Connection Considerations When an NI 783xR AI signal is referenced to a ground that can be shared with other input signals it forms a single ended connection The input signal connect...

Page 31: ...3xR configured for RSE input mode Figure 2 7 Single Ended Input Connections for Nonreferenced or Floating Signals Single Ended Connections for Grounded Signal Sources NRSE Input Mode To measure a grounded signal source with a single ended input mode you must configure the NI 783xR in the NRSE input mode Then connect the signal to the positive input of the NI 783xR instrumentation amplifier and con...

Page 32: ...Figure 2 8 show connections for signal sources that are already referenced to some ground point with respect to the NI 783xR In these cases the instrumentation amplifier can reject any voltage caused by ground potential differences between the signal source and the device With differential input connections the instrumentation amplifier can reject common mode noise pickup in the leads connecting t...

Page 33: ...age generated for a given input code Note If your VI does not set the output value for an AO channel then the AO channel voltage output will be undefined Connecting Analog Output Signals The AO signals are AO 0 n and AOGND AO 0 n are the AO channels AOGND is the ground reference signal for the AO channels Figure 2 9 shows how to make AO connections to the NI 783xR Table 2 3 Ideal Output Voltage an...

Page 34: ...39 The DIO 0 n signals make up the DIO port and DGND is the ground reference signal for the DIO port The NI 7830R has one MIO and one DIO connector for a total of 56 DIO lines The NI 7831R 7833R has one MIO and two DIO connectors for a total of 96 DIO lines Refer to Figure B 1 NI 783xR Connector Locations and Figure B 2 NI 783xR I O Connector Pin Assignments for the connector locations and the I O...

Page 35: ... from such signal connections Caution Do not short the DIO lines of the NI 783xR directly to power or to ground Doing so can damage the NI 783xR by causing excessive current to flow through the DIO lines You can connect multiple NI 783xR digital output lines in parallel to provide higher current sourcing or sinking capability If you connect multiple digital output lines in parallel your applicatio...

Page 36: ...n in Figure 2 10 The NI 783xR SH68 C68 S shielded cable contains 34 twisted pairs of conductors To maximize the digital I O available on the NI 783xR some of the DIO lines are twisted with power or ground and some DIO lines are twisted with other DIO lines To obtain maximum signal integrity place edge sensitive or high frequency digital signals on the DIO lines that are paired with power or ground...

Page 37: ...the NI PXI 783xR the RTSI trigger lines are labeled PXI TRIG 0 7 In addition the NI PXI 783xR can use the PXI star trigger line to send or receive triggers from a device plugged into Slot 2 of the PXI chassis The PXI star trigger line on the NI PXI 783xR is PXI STAR The NI 783xR can configure each RTSI trigger line either as an input or an output signal Because each trigger line on the RTSI bus is...

Page 38: ...al bus right lines on the NI PXI 783xR are PXI LBR 0 12 The PXI local bus left lines on the NI PXI 783xR are PXI LBLSTAR 0 12 The NI PXI 783xR can configure each PXI local bus line either as an input or an output signal Only one device can drive the same physical local bus line at a time For example if the NI PXI 783xR is configured to drive a signal on PXI LBR 0 the device in the slot immediately...

Page 39: ... the same physical star trigger line simultaneously Such signal driving can damage the NI 783xR and the other device NI is not liable for any damage resulting from such signal driving Refer to the PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 at www pxisa org for more information about PXI triggers Switch Settings Refer to Figure 2 11 for the location of switc...

Page 40: ...Chapter 2 Hardware Overview of the NI 783xR National Instruments Corporation 2 21 NI 783xR User Manual Figure 2 11 Switch Location on the NI PXI 783xR SW1 SW2 SW3 ...

Page 41: ...te the following steps to prevent a VI stored in Flash memory from loading to the FPGA 1 Power off and unplug the PXI CompactPCI chassis or PCI computer 2 Remove the NI 783xR from the PXI CompactPCI chassis or PCI computer 3 Move SW1 to the ON position as shown in Figure 2 13b SW1 SW2 SW3 1 2 3 ON a Normal Operation Default 1 2 3 ON b Prevent VI From Loading ...

Page 42: ...oload an FPGA VI Note When the NI 783xR is powered on with SW1 in the ON position the analog circuitry does not return properly calibrated data Move the switch to the ON position only while you are using software to reconfigure the NI 783xR for the desired power up behavior Afterward return SW1 to the OFF position Power Connections Two pins on each I O connector supply 5 V from the computer power ...

Page 43: ... traveling through areas with large magnetic fields or high electromagnetic interference Route signals to the device carefully Keep cabling away from noise sources The most common noise source in a PXI DAQ system is the video monitor Keep the monitor and the analog signals as far apart as possible Use the following recommendations for all signal connections to the NI 783xR Separate NI 783xR signal...

Page 44: ...the levels indicated in Appendix A Specifications The onboard nonvolatile Flash memory stores the calibration constants for the device Calibration constants are the values that were written to the CalDACs to achieve calibration in the factory The NI 783xR hardware reads these constants from the Flash memory and loads them into the CalDACs at power on This occurs before you load a VI into the FPGA ...

Page 45: ...ration An external calibration refers to calibrating your device with a known external reference rather than relying on the onboard reference The NI 783xR has an onboard calibration reference to ensure the accuracy of self calibration The reference voltage is measured at the factory and stored in the Flash memory for subsequent internal calibrations Externally calibrate the device annually or more...

Page 46: ...channels NI 7830R 4 NI 7831R 8 NI 7833R 8 Input modes DIFF RSE NRSE software selectable selection applies to all channels Type of ADC Successive approximation Resolution 16 bits 1 in 65 536 Conversion time 4 µs Maximum sampling rate 200 kS s per channel Input impedance Powered on 10 GΩ in parallel with 100 pF Powered off 4 kΩ min Overload 4 kΩ min Input signal range 10 V Input bias current 2 nA In...

Page 47: ...e 1 8 LSBrms including quantization Nominal Range V Absolute Accuracy Relative Accuracy of Reading Offset µV Noise Quantization µV Temp Drift C Absolute Accuracy at Full Scale mV Resolution µV Positive Full Scale Negative Full Scale 24 Hours 1 Year Single Point Averaged Single Point Averaged 10 0 10 0 0 0496 0 0507 2542 1779 165 0 0005 7 78 2170 217 Note Accuracies are valid for measurements follo...

Page 48: ...ristics Output type Single ended voltage output Number of channels NI 7830R 4 NI 7831R 8 NI 7833R 8 Resolution 16 bits 1 in 65 536 Update time 1 0 µs Max update rate 1 MS s Type of DAC Enhanced R 2R Data transfers Interrupts programmed I O Step Size Accuracy 16 LSB 4 LSB 2 LSB 20 0 V 7 5 µs 10 3 µs 40 µs 2 0 V 2 7 µs 4 1 µs 5 1 µs 0 2 V 1 7 µs 2 9 µs 3 6 µs ...

Page 49: ...cy Absolute Accuracy at Full Scale mV of Reading Offset µV Temp Drift C Positive Full Scale Negative Full Scale 24 Hours 1 Year 10 0 10 0 0 0335 0 0351 2366 0 0005 5 88 Note Accuracies are valid for analog output following an internal calibration Analog output accuracies are listed for operation temperatures within 1 C of internal calibration temperature and 10 C of external or factory calibration...

Page 50: ...TL Digital logic levels Maximum output current Imax source 5 0 mA Imax sink 5 0 mA Input leakage current 10 µA Power on state Programmable by line Data transfers Interrupts programmed I O Protection Input 0 5 to 7 0 V Output Short circuit up to eight lines may be shorted at a time Level Min Max Input low voltage VIL Input high voltage VIH 0 0 V 2 0 V 0 8 V 5 5 V Output low voltage VOL where IOUT I...

Page 51: ...NI 7833R 196 608 bytes Timebase 40 80 120 160 or 200 MHz Timebase reference sources NI PCI 783xR Onboard clock only NI PXI 783xR Onboard clock phase locked to PXI 10 MHz clock Timebase accuracy Onboard clock 100 ppm 250 ps jitter Phase locked to PXI 10 MHz Clock NI PXI 783xR only Adds 350 ps jitter 300 ps skew Additional frequency dependent jitter 40 MHz None 80 MHz 400 ps 120 MHz 720 ps 160 MHz 7...

Page 52: ...rement 5 VDC 5 NI 7830R 330 mA typ 355 mA max 1 NI 7831R 330 mA typ 355 mA max 1 NI 7833R 364 mA typ 586 mA max 1 3 3 VDC 5 NI 7830R 462 mA typ 660 mA max 2 NI 7831R 462 mA typ 660 mA max 2 NI 7833R 727 mA typ 1 148 mA max 2 To calculate the total current sourced by the digital outputs use the following equation Where j is the number of digital outputs being used to source current Power available ...

Page 53: ... Channel to channel 24 V Measurement Category I Caution Do not use the NI 783xR for connection to signals in Measurement Categories II III or IV Environmental The NI 783xR is intended for indoor use only Operating Environment NI 7830R NI 7831R 40 MHz or 80 MHz timebase 0 C to 55 C tested in accordance with IEC 60068 2 1 and IEC 60068 2 2 NI 7833R 40 MHz timebase 0 C to 55 C tested in accordance wi...

Page 54: ...d in accordance with IEC 60068 2 56 Note Clean the device with a soft non metallic brush Make sure that the device is completely dry and free from contaminants before returning it to service Shock and Vibration for NI PXI 783xR Only Operational Shock 30 g peak half sine 11 ms pulse Tested in accordance with IEC 60068 2 27 Test profile developed in accordance with MIL PRF 28800F Random Vibration Op...

Page 55: ...ns EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Immunity EN 61326 1997 A2 2001 Table 1 EMC EMI CE C Tick and FCC Part 15 Class A compliant Note For full EMC compliance operate this device with shielded cabling CE Compliance This product meets the essential requirements of applicable European Directives as amended for CE marking as follows Low Voltage Directive safety 73 23 EEC Electromagnetic...

Page 56: ...al connections to the NI 783xR I O connectors Figure B 1 shows the I O connector locations for the NI PXI 7831R 7833R and the NI PCI 7831R 7833R The NI PXI 7830R and NI PCI 7830R do not have Connector 2 DIO Figure B 1 NI 783xR Connector Locations CONNECTOR 0 MIO CONNECTOR 1 DIO CONNECTOR 2 DIO CONNECTOR 0 MIO CONNECTOR 1 DIO CONNECTOR 2 DIO ...

Page 57: ...11 46 12 47 13 48 14 49 15 50 16 51 17 52 18 53 19 54 20 55 21 56 22 57 23 58 24 59 25 60 26 61 27 62 28 63 29 64 30 65 31 66 32 67 33 68 34 5V DGND DGND DGND DGND DGND DGND DGND DGND DIO8 DIO10 DIO12 DIO14 AOGND7 AOGND6 AOGND5 AOGND4 AOGND3 AOGND2 AOGND1 AOGND0 No Connect No Connect AIGND7 No Connect No Connect AIGND5 No Connect AI3 AIGND3 AI2 AI1 AIGND1 AI0 5V DIO1 DIO2 DIO4 DIO5 DIO6 DIO7 DIO0 ...

Page 58: ...hrough 7 AIGND Analog Input Ground These pins are the reference point for single ended measurements in RSE configuration and the bias current return point for differential measurements All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR AISENSE AIGND Input Analog Input Sense This pin serves as the reference node for AI 0 7 when the device is configured for ...

Page 59: ...3xR I O Signal Summary Signal Name Signal Type and Direction Impedance Input Output Protection Volts On Off Source mA at V Sink mA at V Rise Time Bias 5V DO AI 0 7 AI 10 GΩ in parallelwith 100 pF 42 35 2 nA AI 0 7 AI 10 GΩ in parallelwith 100 pF 42 35 2 nA AIGND AO AISENSE AI 10 GΩ in parallelwith 100 pF 42 35 2 nA AO 0 7 AO 1 25 Ω Short circuit to ground 2 5 at 10 2 5 at 10 10 V µs AOGND AO DGND ...

Page 60: ...r contains all the NI 783xR analog output signals You can plug this connector directly into a 5B backplane for AO signal conditioning The NI 783xR AO 0 n correspond to the 5B backplane channels 0 n in sequential order The 50 pin header contains the 16 DIO lines available on the NI 783xR MIO connector You can plug this header directly into an SSR backplane for digital signal conditioning DIO lines ...

Page 61: ...pond to Slots 0 15 on an SSR backplane in sequential order You can connect to an SSR backplane containing a number of channels unequal to the number of lines on the 2 4 6 8 10 12 14 16 18 20 22 24 26 1 3 5 7 9 11 13 15 17 19 21 23 25 AO0 AOGND0 AO1 AO2 AOGND2 AO3 AO4 AOGND4 AO5 AO6 AOGND6 AO7 NC NC NC AOGND1 NC NC AOGND3 NC NC AOGND5 NC NC AOGND7 NC AO 0 7 Connector Pin Assignment 2 4 6 8 10 12 14...

Page 62: ...3 35 37 39 41 43 45 47 49 DIO23 DIO22 DIO21 DIO20 DIO19 DIO18 DIO17 DIO16 DIO15 DIO14 DIO13 DIO12 DIO11 DIO10 DIO9 DIO8 DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 DIO0 5V NC NC NC NC NC NC NC NC NC DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND DGND 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 4...

Page 63: ...re the SCB 68 as a general purpose connector block Refer to Figure C 1 for the general purpose switch configuration Figure C 1 General Purpose Switch Configuration for the SCB 68 Terminal Block After configuring the SCB 68 switches you can connect the I O signals to the SCB 68 screw terminals Refer to Appendix B Connecting I O Signals for the connector pin assignments for the NI 783xR After connec...

Page 64: ...struments Application Engineers make sure every question receives an answer For information about other technical support options in your area visit ni com services or contact your local office at ni com contact Training and Certification Visit ni com training for self paced training eLearning virtual classrooms interactive CDs and Certification program information You also can register for instru...

Page 65: ...m calibration If you searched ni com and could not find the answers you need contact your local office or NI corporate headquarters Phone numbers for our worldwide offices are listed at the front of this manual You also can visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses ...

Page 66: ...ymbol Prefix Value p pico 10 12 n nano 10 9 µ micro 10 6 m milli 10 3 k kilo 103 M mega 106 G giga 109 Numbers Symbols Degrees Greater than Greater than or equal to Less than Less than or equal to Negative of or minus Ω Ohms Per Percent Plus or minus Positive of or plus ...

Page 67: ...oltage to a digital number AI Analog input AI i Analog input channel signal AIGND Analog input ground signal AISENSE Analog input sense signal AO Analog output AO i Analog output channel signal AOGND Analog output ground signal ASIC Application Specific Integrated Circuit A proprietary semiconductor component designed and manufactured to perform a set of specific functions B bipolar A signal range...

Page 68: ...nal usually expressed in decibels dB common mode voltage Any voltage present at the instrumentation amplifier inputs with respect to amplifier ground CompactPCI Refers to the core specification defined by the PCI Industrial Computer Manufacturer s Group PICMG D D A Digital to analog DAC Digital to analog converter An electronic device often an integrated circuit that converts a digital number into...

Page 69: ...m computer memory DNL Differential nonlinearity A measure in LSB of the worst case deviation of code widths from their ideal value of 1 LSB DO Digital output E EEPROM Electrically erasable programmable read only memory ROM that can be erased with an electrical signal and reprogrammed F FPGA Field Programmable Gate Array FPGA VI A configuration that is downloaded to the FPGA and that determines the...

Page 70: ... programming language that uses icons instead of lines of text to create programs LSB Least significant bit M m Meter max Maximum MIMO Multiple input multiple output min Minimum MIO Multifunction I O monotonicity A characteristic of a DAC in which the analog output always increases as the values of the digital code input to it increase mux Multiplexer A switching device with multiple inputs that s...

Page 71: ...th respect to the measurement system ground O OUT Output pin A counter output pin where the counter can generate various TTL pulse waveforms P PCI Peripheral Component Interconnect A high performance expansion bus architecture originally developed by Intel to replace ISA and EISA It is achieving widespread acceptance as a standard for PCs and work stations PCI offers a theoretical maximum transfer...

Page 72: ...ms Root mean square RSE Referenced single ended mode All measurements are made with respect to a common reference measurement system or a ground Also called a grounded measurement system RTSI Real time system integration bus The timing and triggering bus that connects multiple devices directly This allows for hardware synchronization across devices S s Seconds S Samples S s Samples per second Used...

Page 73: ... of the temperature TTL Transistor transistor logic two s complement Given a number x expressed in base 2 with n digits to the left of the radix point the base 2 number 2n x V V Volts VDC Volts direct current VHDCI Very high density cabled interconnect VI Virtual instrument Program in LabVIEW that models the appearance and function of a physical instrument VIH Volts input high VIL Volts input low ...