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DT3034 User`s Manual

1. A D TB1 Analog In 0 5 TB2 dD TB34 DT740 Floating 5 p O D Panel Signal s O Source Analog In 0 A D M Return D D T R1 D D oO D You can use resistor R1 to Analog Ground connect the low side of channel 0 to analog B ground D Analog In 0 D TB q TB34 D TB2 D DT740 D Panel D D Analog In 0 R D O eturn D D oO O oO D DC Supply Analog Ground Figure 7 Connecting Differential Voltage Inputs to the DT740 Shown for Channel 0 Note that since they measure the difference between the signals at the high and low 3 inputs differential connections usually cancel any common mode voltages leaving only the signal However if you are using a grounded signal source and ground loop problems arise connect the differential signals to the DT740 screw terminal panel as shown in Figure 8 Make sure that the low side of the signal J is connected to ground at the signal source not at the screw terminal panel and do not tie the two grounds together 47 Chapter 4 DT740 Panel D T Analog In 0 2 ae qp TB34 Grounded we D S Signal Es 0 D Gireg d Analog In 0 D O EN Return D D D D R1 O D Signal Source Ground Vg Analog Ground Resistor R1 should be installed for bias return in case the external ground is floatin
2. Chan 0 Chan2 Chan0 nan 2 Chano Chan 2 Chano Chan 2 Chan 1 Chan 1 Chan 1 Chan 1 A D Sample Clock Board waits for Post trigger event occurs retrigger event Retrigger event occurs post trigger data acquired post trigger data acquired for for two scans of the CGL two scans of the channel list Figure 23 Continuous Post Trigger Mode with Triggered Scan Pre Trigger Acquisition Use pre trigger acquisition mode when you want to acquire data before a specific external event occurs Using software specify the following parameters The dataflow as ContinuousPreTrigger The pre trigger source as Software The post trigger source as the external digital TTL trigger or the external analog threshold trigger e If you are using triggered scan mode the retrigger source as the software retrigger Refer to page 76 for more information on the supported conversion modes refer to page 79 for information on the supported trigger sources Note When using pre trigger acquisition you cannot use an external retrigger in triggered scan mode refer to page 77 for more information on triggered scan mode Pre trigger acquisition starts when you start the operation and stops when the board detects the selected post trigger source indicating that the first post trigger sample was acquired this sample is ignored Principles of Operation If you are using
3. Pin Signal Description Pin Signal Description 1 5 V Output 2 5 V Output 3 Reserved 4 A D Sample Clock Output 5 A D Trigger Output 6 External A D TTL Trigger 7 External A D Sample Clock Input 8 External D A TTL Trigger 9 External D A Clock Input 10 User Counter Output 3 11 User Clock Input 3 12 User Counter Output 2 18 User Clock Input 2 14 User Counter Output 1 15 User Clock Input 1 16 User Counter Output 0 17 User Clock Input 0 18 Digital Ground 19 Digital UO Bank B 3 20 Digital I O Bank B 2 21 Digital I O Bank B 1 22 Digital I O Bank B O 23 Digital Ground 24 Digital I O Bank A 3 25 Digital I O Bank A 2 26 Digital I O Bank A 1 27 Digital I O Bank A O 28 Digital Ground 29 Dynamic Digital Output 1 30 Dynamic Digital Output 0 31 Reserved 32 Reserved 33 Shield Ground 34 Analog Trigger 35 Digital Ground 36 Digital Ground 37 Reserved 38 Digital Ground 39 Digital Ground 40 Digital Ground 41 Digital Ground 42 Digital Ground 43 Digital Ground 44 External Gate 3 45 Digital Ground 46 External Gate 2 47 Digital Ground 48 External Gate 1 49 Digital Ground 50 External Gate O 51 Digital Ground 52 Digital Ground 53 Digital I O Bank B 7 54 Digital I O Bank B 6 55 Digital UO Bank B 5 56 Digital I O Bank B 4 57 Digital Ground 58 Digital I O Bank A 7 Connector Pin Assignments Table 31 Connector J2 Pin Assignments on the DT3034 Board cont Pin Signal Description Pin Signal Description 59 D
4. IEPE Support Table 18 DT3034 IEPE Support Options DT3034 Software Programmable AC Coupling SupportsACCoupling A D D A DIN DOUT C T QUAD Software Programmable DC Coupling SupportsDCCoupling Software Programmable External Excitation Current Source SupportsExternalExcitationCurrentSrc Software Programmable Internal Excitation Current Source SupportsInternalExcitationCurrentSrc Available Excitation Current Source Values SupportedExcitationCurrentValues 117 Chapter 7 Triggers 118 Table 19 DT3034 Trigger Options DT3034 Software Trigger Support SupportsSoftwareTrigger A D Yes D A Yes DIN DOUT C T Yes QUAD External Positive TTL Trigger Support SupportsPosExternalTTLTrigger Yes Yes Yes External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Yes Yes External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Negative TTL Trigger Support for Single Value Operations SupportsSvNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Yes Yes Negative Threshold Trigger Support SupportsNegThresholdTrigger Yes Yes Digital Event Trigger Support SupportsDigitalEventTrigger a For SDK users specify OL TRG EXTRA for the olDaSetTrigg
5. DT740 Panel x Digital O Bank A 0 gt 13 igita an q TB89 TTL Inputs Digital UO Bank A 1 5 T590 O TB105 Digital Shield E D O D 0 D D O 0 0 Figure 11 Connecting Digital Inputs to the DT740 Shown for Lines 0 and 1 Bank A Figure 12 shows how to connect a digital output signal to the DT740 screw terminal panel DT740 Panel 0 Out LED On x qd TB97 500 Q Digital UO Bank B 0 D D gy T D D TB81 D Digital Ground D O D D D D D D D Figure 12 Connecting Digital Outputs to the DT740 Shown for Line 0 Bank B 51 Chapter 4 Connecting Counter Timer Signals The DT3034 board with the DT740 screw terminal panel provides counter timers that you can use for the following operations Eventcounting Frequency measurement Pulse output rate generation one shot and repetitive one shot This section describes how to connect counter timer signals to perform these operations Refer to page 96 for more information on using the counter timers Connecting Event Counting Signals Figure 13 Figure 14 and Figure 15 show examples of connecting event counting signals to the DT740 screw terminal panel A User Clock Input 0 dD TB58 p TB60 Signal Source g TB61 TB83 Digital Ground DT740 Panel External Gating O Switch Gate 0 O p No Di
6. Place ina secure shipping container 3 Return the board to the following address making sure the RMA number is visible on the outside of the box Customer Service Dept Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 139 Chapter 9 140 m Specifications Analog Input bp cification amp cssc eere he nes eene tr ee edt e e e lec ace ala 142 Analog Output SpecilicalioDs iii Lecce ead ERE eee e e pee de ee dele en 145 Distal VI Opec ICAOn coop ter Rr HE EROR ER Ee TOPIC EN YE ER E X N 147 Counters Timer Specifications conoci e ee tha c e herr eet 148 Power Physical and Environmental Specifications 0 0 000 ee eee eee 149 Cannector Speciealons nk cy ee eek oe S Weeden ERR pay ols 150 Regulator SDEPIBCBEODE essc e Rus CERT e ra quee ese ea AAA 151 141 Appendix A Analog Input Specifications Table 23 lists the specifications for the A D subsystem on the DT3034 board Table 23 A D Subsystem Specifications Feature DT3034 Specifications Number of analog input channels Single ended pseudo differential 32 Differential 16 Number of gains 4 1 2 4 8 Resolution 16 bits Data encoding Bipolar Offset binary Unipolar Binary System accuracy full scale Gain 1 0 01 Gain 2 0 02 Gain 4 0 02 Gain 8 0 03 Nonlinearity integral 2 0 LSB Differential linearity 0 75 LSB no missing codes
7. 2 0 V minimum IOH 15 mA 2 4 V minimum IOH 3 mA 0 5 V maximum IOL 24 mA 0 4 V maximum IOL 12 mA 33 Q series resistor Dynamic Digital Output Channels Number of channels Output driver Output driver high voltage Output driver low voltage Termination 2 TTL 2 0 V minimum IOH 15 mA 2 4 V minimum IOH 3 mA 0 5 V maximum IOL 24 mA 0 4 V maximum IOL 12 mA 33 Q series resistor a The input capacitance is isolated with a 330 Qresistor to prevent typical amplifiers from oscillating with capacitive loading Specifications Analog Output Specifications Table 24 lists the specifications for the D A subsystem on the DT3034 board Table 24 D A Subsystem Specifications Feature DT3034 Specifications Number of analog output channels 2 voltage output Resolution 16 bits Data encoding input Offset binary Nonlinearity integral 4 0 LSB Differential linearity 0 75 LSB monotonic to 15 bits Output range 10 V bipolar Error Zero Adjustable to 0 Gain Adjustable to 0 Throughput Full scale 200 kSamples s maximum per channel 100 mV Step continuously paced 100 mV Step waveform mode 500 kSamples s maximum per channel 500 kSamples s maximum per channel Current output 5 mA maximum load Output impedance 0 1 Qmaximum Capacitive drive capability 0 004 pF no oscillators
8. DT3034 boards use offset binary data encoding such 0000 to represent negative full scale and FFFFh to represent positive full scale Use software to specify the data encoding as binary The ADC outputs FFFFh for above range signals and 0000 for below range signals The board packs two input samples an even and an odd sample into each transfer to the host computer Samples corresponding to entries 0 2 4 and so on in the channel list are considered even samples samples corresponding to entries 1 3 5 and so on in the channel list are considered odd samples 85 Chapter 6 86 Using flags internally the board determines whether the acquired samples are pre trigger or post trigger samples These flags are not transferred to the host computer The host computer can read the register on the board to determine where the post trigger data starts Note that the host computer cannot read data directly from the board the data must be transferred to the host computer Using PCI bus mastering the board transfers the analog input data to a 256 KB circular buffer which is dedicated to the hardware in the host computer The board treats this buffer as two consecutive 128 KB blocks of memory Note When you stop an analog input operation a final block of 32 samples is transferred even if less data is required The host software ignores the extra samples The DT3034 Device Driver accesses the hardware circular buffer to fill use
9. If you are using an analog output channel list the subsystem defaults to a gain of 1 for each channel therefore you do not have to specify the gain D A Output Clock Sources DT3034 boards provide two clock sources for pacing the output of each channel in the analog output channel list Aninternal D A output clock that uses the 24 bit D A Counter on the board Anexternal D A output clock that you can connect to the screw terminal panel The following subsections describe the internal and external D A output clocks in more detail Internal D A Output Clock The internal D A output clock uses a 20 MHz time base Conversions start on the falling edge of the counter output the output pulse is active low Through software specify the clock source as internal and the clock frequency at which to pace the analog output operation The minimum frequency supported is 1 2 Hz 1 2 Samples s The maximum frequency supported is 500 kHz 500 kSamples s with 100 mV steps or 200 kHz 200 kSamples s with full scale steps External D A Output Clock The external D A output clock is useful when you want to pace analog output operations at rates not available with the internal D A output clock if you want to pace at uneven intervals or if you want to start pacing when an external event occurs 88 Principles of Operation Connect an external D A output clock to screw terminal 74 on the DT740 screw terminal panel Conversions star
10. NumberOfResolutions 1 1 28 28 1 0 Available Resolutions SupportedResolutions 16 16 8 16 8 162 16 a When configured for 16 bits of resolution element 0 uses DIO bits 15 to 0 Banks A and B When configured for 8 bits of resolution element 0 uses bits 7 to 0 Bank A and element 1 uses bits 15 to 8 Bank B b You can also internally route the clock output signal from one user counter to the clock input signal of the next user counter to internally cascade the counters In this way you can create a 32 bit counter without externally connecting two counters together 116 Supported Device Driver Capabilities Thermocouple and RTD Support Table 17 DT3034 Thermocouple and RTD Support Options DT3034 Thermocouple Support SupportsThernocouple A D D A DIN DOUT C T QUAD RTD Support SupportsRTD Resistance Support ReturnsOhms Voltage Converted to Temperature in Hardware SupportsTemperatureDatalnStream Supported Thermocouple Types ThermocoupleType Supported RTD Types RTDType Supports CJC Source Internally in Hardware SupportsCjcSourcelnternal Supports CJC Channel SupportsCjcSourceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcTemperaturesInStream Supports Programmable Filters SupportsTemperatureFilters Programmable Filter Types TemperatureFilterType
11. O TB2 D 2 Analog In 1 D TB3 O 1 O D O 0 O D 0 Remove Jumper W1 to use Amp Low as a remote ground sense c Analog Ground Make this connection as close to Vsources AS possible to reduce ground loop errors Vem is the common mode voltage for all 32 analog inputs Figure 6 Connecting Pseudo Differential Voltage Inputs to the DT740 Shown for Channels 0 and 1 Connecting Differential Voltage Inputs Figure 7A illustrates how to connect a floating signal source to the DT740 screw terminal panel using differential inputs A floating signal source is a voltage source that has no connection with earth ground For floating signal sources you need to provide a bias return path by adding resistors R1 to R16 for channels 0 to 15 respectively If the input signal is 10 V then the common mode voltage could be 1 V Theoretically the resistor value Ry should be 1 V divided by the input bias current 20 nA or 50 mQ However when you add noise from external sources to the high impedance a resistor value of 100 Q to 100 kQis more practical In Figure 7B the signal source itself provides the bias return path therefore you do not need to use bias return resistors R is the signal source resistance while R is the resistance required to balance the bridge Note that the negative side of the bridge supply must be returned to analog ground Wiring Signals
12. Triggered Scan Mode 114 Table 11 DT3034 Triggered Scan Mode Options DT3034 A D D A DIN DOUT C T QUAD Triggered Scan Support SupportsTriggeredScan Yes Maximum Number of CGL Scans per Trigger MaxMultiScanCount 2562 0 0 0 0 0 Maximum Retrigger Frequency MaxRetriggerFreq 250 kHz 0 0 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 1 2 Hz 0 0 0 0 0 a The channel list depth of 1024 entries in conjunction with a multiscan count of 256 provides an effective channel list depth of up to 256K entries b The maximum retrigger frequency is based on the number of samples per trigger as follows Min Retrigger of CGL entries x of CGLs per trigger 2 us Period A D sample clock frequency Max Retrigger 1 Frequency Min Retrigger Period c The value of 1 2 Hz assumes the minimum number of samples is 1 Supported Device Driver Capabilities Data Encoding Table 12 DT3034 Data Encoding Options DT3034 A D D A DIN DOUT C T QUAD Binary Encoding Support SupportsBinaryEncoding Yes Yes Yes Yes Yes Twos Complement Support SupportsTwosCompEncoding Returns Floating Point Values ReturnsFloats Channels Table 13 DT3034 Channel Options DT3034 A D D A DIN DOUT C T QUAD Number of Channels NumberOfChannels 332 2 1 1 0 0 SE Support SupportsSingleEnded Yes SE Channels MaxSingleEndedChannels 32
13. board in the computer Turn off the computer Turn off all peripherals printer modem monitor and so on connected to the computer Unplug the computer and all peripherals Remove the cover from you computer Refer to your computer s user s manual for instructions Installing the Board and Loading the Device Driver Setting up Expansion Slots Once you have set up the computer set up the expansion slots as follows 1 Select a 32 bit or 64 bit PCI expansion slot PCI slots are shorter than ISA or EISA slots and are usually white or ivory Commonly three PCI slots one of which may be a shared ISA PCI slot are available If an ISA board exists in the shared slot you cannot use the slot for a PCI board if a PCI board exists in the shared slot you cannot use the slot for an ISA board 2 Remove the cover plates from the selected expansion slots Retain the screws that held them in place you will use them later to install the board 27 Chapter 2 Removing the Board for Handling To remove the board for handling follow these steps 1 Discharge any static electricity by holding the wrapped board in one hand while placing your other hand firmly on a metal portion of the computer chassis 2 Carefully remove the antistatic packing material from the board It is recommended that you save the original packing material in the unlikely event that your board requires servicing in the future 3 Hold the board by
14. until you stop the operation Principles of Operation Error Conditions DT3034 boards can report an output FIFO underflow error to the host computer This error indicates that the analog output data was not being transferred fast enough across the PCI bus from the host computer to the output FIFO on the board If the D A output clock occurs while the output FIFO is empty an error is not reported since the most likely cause is that the host computer has no more data to output in this case the last value received from the host computer is output by the specified DACs continuously until the board is powered down or new data becomes available If however the host does an additional write to the output FIFO after the D A output clock occurred while the output FIFO was empty the data is written to the DACs and the output FIFO Underflow error is reported This error has no effect on board operation the host computer can clear this error To avoid this error ensure that the host computer provides data to the output FIFO faster than the DACs are converting the data You can read the value of the output FIFO counter to determine how many samples are in the output FIFO If this error condition occurs the host computer stops transferring data to the board and the board continues to output the last data transferred to it by the host computer 93 Chapter 6 Digital I O Features This section describes the following features of the
15. AMP Tyco 787003 3 bag of 200 68 Pin Connector Plug for cable Cable shell kit Cable wire Receptacle for board Latching posts AMP Tyco 5787131 3 AMP Tyco 787229 1 AMP Tyco 57508 1 Molex 71430 0101 AMP Tyco 787003 3 bag of 200 EP307 Amp Tyco 1 636326 1 EP308 Amp Tyco 1 636327 1 Specifications Regulatory Specifications Table 29 lists the regulatory specifications for the DT3034 boards Table 29 Regulatory Specifications Feature Specifications Emissions EMI FCC Part 15 EN55022 1994 A1 1995 A2 1997 VCCI AS NZS 3548 Class A Immunity EN61000 6 1 2001 RoHS EU Directive 2002 95 EG Compliant as of July 1st 2006 151 Appendix A 152 Connector Pin Assignments 153 Appendix B 154 Connector J1 on the DT3034 Board Table 30 lists the pin assignments of connector J1 on the DT3034 board Table 30 Connector J1 Pin Assignments on the DT3034 Board Pin Signal Description Pin Signal Description 1 5 V Ref Out 2 Reserved 3 Reserved 4 Analog Output 1 5 Analog Output 0 6 15 V output 7 15 V output 8 Shield Ground 9 Amp Low 10 Analog Input 23 15 11 Analog Input 22 14 12 Analog Input 21 13 13 Analog Input 20 12 14 Analog Input 19 11 15 Analog Input 18 10 16 Analog Input 17 09 17 Analog Input 16 08 18 Analog Input 0
16. Bank A 5 95 59 Digital I O Bank A 6 96 58 Digital I O Bank A 7 97 22 Digital I O Bank B O 98 21 Digital I O Bank B 1 99 20 Digital UO Bank B 2 100 19 Digital I O Bank B 3 101 56 Digital I O Bank B 4 102 55 Digital I O Bank B 5 103 54 Digital I O Bank B 6 104 53 Digital I O Bank B 7 105 33 Digital Shield Ground 106 68 Analog Ground 107 34 Analog Trigger 108 67 Digital Shield Ground 109 32 Reserved 110 66 Reserved 111 35 36 Digital Ground 112 1 2 5 V Out Wiring Signals Connecting Analog Input Signals The DT740 screw terminal panel supports both voltage and current loop inputs You can connect analog input voltage signals to the screw terminal panels in the following configurations Single ended Choose this configuration when you want to measure high level signals noise is not significant the source of the input is close to the screw terminal panel and all the input signals are referred to the same common ground When you choose the single ended configuration all 32 analog input channels are available e Pseudo Differential Choose this configuration when noise or common mode voltage the difference between the ground potentials of the signal source and the ground of the screw terminal panel or between the grounds of other signals exists and the differential configuration is not suitable for your application This option provides less noise rejection than the differential configuration however all 32 analog
17. Clock Out 80 3 Reserved 81 23 Digital Ground 82 39 41 Digital Ground 28 42 57 62 83 18 Digital Ground 84 65 Reserved 38 40 63 64 85 31 Reserved 86 37 Reserved 87 30 Dynamic Digital Output O 88 29 Dynamic Digital Output 1 89 27 Digital I O Bank A O 90 26 Digital I O Bank A 1 91 25 Digital I O Bank A 2 92 24 Digital I O Bank A 3 93 61 Digital I O Bank A 4 94 60 Digital I O Bank A 5 95 59 Digital I O Bank A 6 96 58 Digital I O Bank A 7 97 22 Digital I O Bank B O 98 21 Digital I O Bank B 1 99 20 Digital I O Bank B 2 100 19 Digital I O Bank B 3 101 56 Digital UO Bank B 4 102 55 Digital I O Bank B 5 103 54 Digital I O Bank B 6 104 53 Digital I O Bank B 7 105 33 Digital Shield Ground 106 68 Analog Ground 159 Appendix B 160 Table 33 Screw Terminal Assignments for Connector J2 on the DT740 cont TB J2Pin Signal Description TB J2 Pin Signal Description 107 34 Analog Trigger 108 67 Digital Shield Ground 109 32 Reserved 110 66 Reserved 112 1 2 5 V Out 111 35 36 Digital Ground A Using Your Own Screw Terminal Panel P lh TTT 163 Analog COLI eiaei pce vere eec Hb e e a IH ente P d de a i 165 Digital Inputs and Counter Timer Inputs lt siei oce e RR IR 166 buceo EU 167 Cabling toc RR ETE 168 161 Appendix C 162 Data acquisition boards can perform only as well as the input connections and signal integrity you provid
18. Note In the case of a one shot operation the pulse width is set to 100 automatically Ensure that the signals are wired appropriately Figure 37 shows one example of connecting a pulse output operation This example uses the DT740 screw terminal panel and user counter 0 105 Chapter 6 DT740 Screw Terminal Panel D p User Counter Output 0 TB59 TB60 Heater a D TB61 Controller D 0 Digital Ground E TB83 e D D D External O Gating D Switch S Gate 0 Digital Ground Figure 37 Connecting One Shot Signals Shown for Counter Output 0 and Gate 0 Figure 38 shows an example of a one shot operation using an external gate input rising edge a clock output frequency of 1 kHz pulse period of 1 ms and a low to high pulse type One Shot Operation Starts External Gate Signal a 1 ms period 100 duty cycle Pulse Output Signal Figure 38 Example of One Shot Mode 106 Principles of Operation Repetitive One Shot Use repetitive one shot mode to generate a pulse output signal each time the board detects a trigger determined by the gate input signal You can use this mode to clean up a poor clock input signal by changing its pulse width then outputting it In repetitive one shot mode the internal C T clock source is more useful than an external
19. T clock signals of each counter timer Table 5 External C T Clock Input Signals Counter Timer Screw Terminal on the DT740 0 TB58 1 TB62 2 TB66 3 TB70 Internally Cascaded Clock You can also internally route the clock output signal from one user counter to the clock input signal of the next user counter to internally cascade the counters In this way you can create a 32 bit counter without externally connecting two counters together DT3034 boards support software cascading on counters 0 and 1 1 and 2 and 2 and 3 Specify internal cascade mode in software The rising edge of the clock input signal is active 97 Chapter 6 98 Through software specify the clock source as internal and the frequency at which to pace the counter timer operation this is the frequency of the clock output signal The maximum frequency that you can specify for the clock output signal is 10 MHz For a 32 bit cascaded counter the minimum frequency that you can specify for the clock output signal is 0 00465 Hz which corresponds to a rate of once every 215 seconds Note Insoftware specify the clock input and gate input for the first counter in the cascaded pair For example if counters 1 and 2 are cascaded specify the clock input and gate input for counter 1 Gate Types The active edge or level of the gate input to the counter enables counter timer operations The operation starts when the clock input signa
20. a Screw Terminal Panel Configuring Resistors R1 to R16 Bias Return Resistor locations R1 to R16 connect the low side of analog input channels to analog ground These resistor locations are typically used when connecting differential inputs to analog input channels 0 to 15 where R1 corresponds to analog input channel 0 and R16 corresponds to analog input channel 15 The high side of the corresponding analog input channels returns the source input impedance through the bias return resistors to the low side of the channels and then to analog ground Typical resistor values are 1 kQto 100 kQ depending on the application Refer to page 46 for an example of using bias return resistors Configuring Resistors R17 to R32 Current Shunt Resistor locations R17 to R32 are typically used to convert current to voltage on channels 0 to 15 where R17 corresponds to analog input channel 0 and R32 corresponds to analog input channel 15 These resistor locations connect the high side to the low side of the corresponding channels thereby acting as shunts If for example you add a 250 Or resistor to location R17 and connect a 4 to 20 mA current loop input to channel 0 the input range is converted to 1 to 5 V Note that depending on your application you may need to use resistors R1 to R16 with resistors R17 to R32 for proper operation Refer to page 49 for an example of using current shunt resistors 37 Chapter 3 38 T Wiring Signal
21. analog output operations an analog trigger event occurs when the DT3034 board detects a transition from above a threshold level to below a threshold level falling edge or a transition from below a threshold level to above a threshold level rising edge The following analog threshold trigger sources are available External Analog Trigger input signal This trigger source is supported by the DataAcq SDK it is not supported by the DT Open Layers Class Library Connect an external analog signal to screw terminal 107 on the DT740 screw terminal panel Using software specify the trigger source as either a rising edge OL TRG EXTRA 1 for DataAcq SDK users or falling edge analog threshold trigger OL TRG EXTRA422 for DataAcq SDK users 89 Chapter 6 90 Oneofthe analog input channels after gain is applied Using software specify the trigger source as either a positive threshold trigger or a negative threshold trigger Using software specify the analog input channel used as the analog threshold trigger as the first channel in the analog input channel list refer to page 72 for more information On DT3034 boards the threshold level is set using a dedicated 8 bit DAC the second D A subsystem the hysteresis is fixed at 50 mV Using software program the threshold level by writing a voltage value to the DAC of the second analog output subsystem this value can range from 40 V to 10 V Note If you are using an analog thre
22. appears Once the DT3034 Calibration Utility is running and you have connected the required calibration signals to the DT740 screw terminal panel you can calibrate the analog input circuitry of the DT3034 board either automatically or manually auto calibration is the easiest to use and is the recommended calibration method This section describes these calibration methods Using the Auto Calibration Procedure Auto calibration is the easiest to use and is the recommended calibration method Note If you want to manually calibrate the bipolar and unipolar ranges instead of auto calibrating them refer to Using the Manual Calibration Procedure on page 128 To calibrate the analog input subsystem do the following 1 From the main menu of the DT3034 Calibration Utility click Configure and then Board 2 Select the name of the DT3034 board to configure from the combo box and then click OK 3 From the main menu of the DT3034 Calibration Utility click Calibrate and then A D 127 Chapter 8 128 In the Reference Source box select the reference that you are using Internal or External Internal is the default In the Auto Calibration box click Go The bipolar zero and full scale and unipolar zero and full scale ranges are automatically calibrated and the calibration values are displayed The bipolar readings should be within 0 001 V the unipolar readings should be within 0 0005 V Click OK In the Range box
23. channel Table 4 lists the effective ranges supported by DT3034 boards using these gains Table 4 Gains and Effective Ranges Unipolar Analog Bipolar Analog Gain Input Range Input Range 1 Oto 10V 10 V 2 0to5V 5 V 4 0 to 2 5 V 2 5 V 8 Oto 1 25 V 1 25 V 74 For each channel choose the gain that has the smallest effective range that includes the signal you want to measure For example if the range of your analog input signal is 1 5 V specify a range of 10 V to 10 V for the board and use a gain of 4 for the channel the effective input range for this channel is then 2 5 V which provides the best sampling accuracy for that channel The simplest way to specify gain for a single channel is to specify the gain for a single value analog input operation using software refer to page 76 for more information on single value operations If you are using an analog input channel list you can use software to specify the gain for each analog input channel entry in the analog input channel list Note For analog input channel 32 the 16 digital I O channels in the channel list specify a gain of 1 A D Sample Clock Sources DT3034 boards provide two clock sources for pacing analog input operations in continuous mode Aninternal A D sample clock that uses the 24 bit A D Counter on the board Anexternal A D sample clock that you can connect to the screw terminal panel Principles of Operatio
24. digital I O subsystem Digital I O lines Digital I O resolution Digital I O operation modes Digital I O Lines DT3034 boards support 16 digital I O lines through the digital input DIN and output DOUT subsystems both subsystems use the same digital I O lines These lines are divided into two banks of eight Bank A lines 0 to 7 and Bank B lines 0 to 7 You can use each bank as either an input port or an output port all eight lines within a bank have the same configuration For example if you use Bank A as an input port port 0 lines 0 to 7 of Bank A are configured as inputs Likewise if you use Bank B as an output port port 1 lines 0 to 7 of Bank B are configured as outputs Specify the digital I O line to read or write in a single value digital I O operation refer to page 94 for more information on single value operations A digital line is high if its value is 1 a digital line is low if its value is 0 On power up or reset no digital data is output from the board Digital I O Resolution Using software specify the number of banks to read by specifying the resolution as 8 for eight lines or 16 for 16 lines If you specify a resolution of 8 two digital I O subsystems are available Element 0 the first subsystem corresponds to the Bank A lines 0 to 7 Element 1 the second subsystem corresponds to Bank B lines 0 to 7 If you specify a resolution of 16 one subsystem is available Note When the resolutio
25. duty cycle of approximately 30 99 Chapter 6 Active Pulse Width high pulse low pulse M X Total Pulse Period Figure 29 Example of a Low to High Pulse Output Type Counter Timer Operation Modes DT3034 boards support the following counter timer operation modes Eventcounting Frequency measurement Rate generation e One shot e Repetitive one shot The following subsections describe these modes in more detail Event Counting Use event counting mode to count events from the counter s associated clock input source If you are using one counter you can count a maximum of 65 536 events before the counter rolls over to 0 and starts counting again If you are using a cascaded 32 bit counter you can count a maximum of 4 294 967 296 events before the counter rolls over to 0 and starts counting again In event counting mode use an external C T clock source refer to page 97 for more information on the external C T clock source Using software specify the counter timer mode as event counting count the C T clock source as external and the gate type that enables the operation Refer to page 99 for information on gates Ensure that the signals are wired appropriately Figure 30 shows one example of connecting an event counting application This example uses the DT740 screw terminal panel and user counter 0 rising clock edges are counted while the gate is active 10
26. falling edge sensitive 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minimum 1 5 V maximum 1 0 uA 1 0 uA 100 ns high 150 ns low 500 kHz 33 Q series resistor External A D digital TTL trigger Input type Input load High level input voltage Low level input voltage Hysteresis High level input current Low level input current Minimum pulse width Termination Schmitt trigger falling edge sensitive 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minimum 1 5 V maximum 1 0 uA 1 0 uA 100 ns high 100 ns low 33 Q series resistor External analog trigger Input type Threshold voltage Threshold range Threshold resolution Hysteresis Input impedance Maximum input voltage Minimum pulse width Threshold sensitive Programmable 10 V to 10 V includes TTL 8 bits 78 mV per LSB 50 mV typical 12 kQ 20 pF typical 20 V 100 ns high 100 ns low 143 Appendix A 144 Table 23 A D Subsystem Specifications cont Feature DT3034 Specifications A D sample clock output signal Output driver Output driver high voltage Output driver low voltage Termination TTL 2 0 V minimum IOH 15 mA 2 4 V minimum IOH 3 mA 0 5 V maximum IOL 24 mA 0 4 V maximum IOL 12 mA 33 Q series resistor A D trigger output signal Output driver Output driver high voltage Output driver low voltage Termination TTL
27. more information 95 Chapter 6 Counter Timer Features The counter timer circuitry on the board provides the clocking circuitry used by the A D and D A subsystems as well as several user counter timer features This section describes the following user counter timer features Units e C T clock sources Gate types Pulse types and duty cycles e Counter timer operation modes Units DT3034 boards support four user 16 bit counter timer units called counters counters are numbered 0 1 2 and 3 Each counter accepts a clock input signal and gate input signal and outputs a clock output signal also called a pulse output signal as shown in Figure 28 Clock Input Signal internal external or gt Counter Ll Pulse Output Signal internally cascaded Gate Input Signal software or external input Figure 28 Counter Timer Channel Each counter corresponds to a counter timer C T subsystem To specify the counter to use in software specify the appropriate C T subsystem For example counter 0 corresponds to C T subsystem element 0 counter 3 corresponds to C T subsystem element 3 C T Clock Sources The following clock sources are available for the user counters Internal C T clock e External C T clock Internally cascaded clock Refer to the following subsections for more information on these clock sources 96 Principles of Operation Internal
28. only for one shot and repetitive one shot mode refer to page 107 for information on these modes Specify that gate type in software Table 6 lists the screw terminals that correspond to the gate input signals of each counter timer Principles of Operation Table 6 Gate Input Signals Counter Timer Screw Terminal on the DT740 0 TB60 1 TB64 2 TB68 3 TB72 Pulse Output Types and Duty Cycles DT3034 boards can output pulses from each counter timer Table 7 lists the screw terminals that correspond to the pulse output signals of each counter timer Table 7 Pulse Output Signals Counter Timer Screw Terminal on the DT740 0 TB59 1 TB63 2 TB67 3 TB71 DT3034 boards support the following pulse output types on the clock output signal High to low transitions The low portion of the total pulse output period is the active portion of the counter timer clock output signal Low to high transitions The high portion of the total pulse output period is the active portion of the counter timer pulse output signal You specify the pulse output type in software The duty cycle or pulse width indicates the percentage of the total pulse output period that is active A duty cycle of 50 then indicates that half of the total pulse is low and half of the total pulse output is high You specify the duty cycle in software Figure 29 illustrates a low to high pulse with a
29. post trigger data using the specified retrigger source to clock the operation Refer to page 77 for more information on triggered scan mode Figure 22 illustrates continuous post trigger mode using a channel list with three entries channel 0 channel 1 and channel 2 Triggered scan mode is disabled In this example post trigger analog input data is acquired on each clock pulse of the A D sample clock The board wraps to the beginning of the channel list and repeats continuously continuously paced scan mode Chano Chan2 ChanO Chan2 ChanO Chan 2 ChanO Chan 2 a 1 Chan 1 Chan 1 Chan 1 A D Sample Clock Post trigger data Post trigger event occurs acquired continuously Figure 22 Continuous Post Trigger Mode without Triggered Scan 81 Chapter 6 82 Figure 23 illustrates the same example using triggered scan mode either a software or external retrigger source The multiscan count is 2 indicating that the channel list will be scanned twice per trigger or retrigger In this example post trigger analog input data is acquired on each clock pulse of the A D sample clock until the channel list has been scanned twice then the board waits for the retrigger event When the retrigger event occurs the board scans the channel list twice more acquiring data on each pulse of the A D sample clock The process repeats continuously with every specified retrigger event
30. second D A subsystem has limited capabilities and is used for threshold triggering only It has an output range of 10 V b DIN and DOUT subsystems use the same DIO lines The tables in this chapter summarize the features available for use with the DT Open Layers for NET Class Library and the DT3034 boards The DT Open Layers for NET Class Library provides properties that return support information for specified subsystem capabilities The first row in each table lists the subsystem types The first column in each table lists all possible subsystem capabilities A description of each capability is followed by the property used to describe that capability in the DT Open Layers for NET Class Library Note Blank fields represent unsupported options For more information refer to the description of these properties in the DT Open Layers for NET Class Library online help or DT Open Layers for NET Class Library User s Manual 112 Supported Device Driver Capabilities Data Flow and Operation Options Table 9 DT3034 Data Flow and Operation Options DT3034 A D D A DIN DOUT C T QUAD Single Value Operation Support SupportsSingleValue Yes Yes Yes Yes Simultaneous Single Value Output Operations SupportsSetSingleValues Continuous Operation Support SupportsContinuous Yes Yes Yes Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Yes Continuous Operation before amp after Tr
31. software retriggered scan mode and the post trigger event has not occurred the board continues to acquire pre trigger data using the Triggered Scan Counter to clock the operation When the post trigger event occurs the operation stops Refer to page 77 for more information on software retriggered scan mode Figure 24 illustrates continuous pre trigger mode using a channel list of three entries channel 0 channel 1 and channel 2 In this example pre trigger analog input data is acquired on each clock pulse of the A D sample clock The board wraps to the beginning of the channel list and the acquisition repeats continuously until the post trigger event occurs When the post trigger event occurs acquisition stops ChanO Chan 2 ChanO Chan 2 ChanO Chan 1 Chan 1 als Sample Clock Pre trigger data acquired Acquisition stops Pre trigger event occurs Post trigger event occurs Figure 24 Continuous Pre Trigger Mode Figure 25 illustrates the same example using software retriggered triggered scan mode The multiscan count is 2 indicating that the channel list will be scanned twice per trigger or retrigger In this example pre trigger analog input data is acquired on each clock pulse of the A D sample clock until the channel list has been scanned twice then the board waits for the software retrigger event When the software retrigger occurs the process repeats The process stops when the post trigge
32. that this example shows the use of an external gate however this connection is not required Figure 15 Cascading Counters on a DT740 Screw Terminal Panel Shown for Event Counting Using Counters 0 and 1 and External Gate 0 53 Chapter 4 Connecting Frequency Measurement Signals One way to measure frequency is to connect a pulse of a known duration such as a one shot output of another user counter to the external gate input as shown in Figure 16 In this configuration the frequency of the clock input is the number of counts divided by the period of the external gate input DT740 Panel User Clock Input 0 D gt TB58 y Gate 0 K q TB60 Signal Source p TB61 User TB83 L 4 p TB63 Counter D Output 1 Digital Ground 009990009 Digital Shield D Figure 16 Connecting Frequency Measurement Applications to the DT740 Screw Terminal Panel Shown for Clock Input 0 and External Gate 0 54 Wiring Signals Connecting Pulse Output Signals Figure 17 Figure 18 and Figure 19 show examples of connecting pulse output applications to the DT740 screw terminal panel Other combinations of signals can be used O d User Counter Output 0 oO A c QD TB59 TB60 Heater S B Ten Controller ES 2 0 Dig
33. to the J2 connector on the DT740 screw terminal panel 19 Chapter 1 Getting Started Procedure The flow diagram shown in Figure 1 illustrates the steps needed to get started using a DT3034 board This diagram is repeated in each getting started chapter the shaded area in the diagram shows you where you are in the getting started procedure ia Install the Board and Load the Device Driver see Chapter 2 starting on page 23 Attach and Configure the Screw Terminal Panel see Chapter 3 starting on page 33 Wire Signals see Chapter 4 starting on page 39 Verify the Operation of the Board see Chapter 5 starting on page 57 Figure 1 Getting Started Flow Diagram 20 Part 1 Getting Started 2 Installing the Board and Loading the Device Driver E TT 25 aetbnp up TS TT 26 EE HIE T Globe uio e e wats e E dn Glee ERRE ES 27 Removing the Board for Handling oce eee ee e e eet ETT A 28 Inserting the DT3084 Board into the Computer ii KK R RE K R R K ree y ee wee 29 Loading the Device DInyer cese eee esee m eet O ped tede nega 30 23 Chapter 2 Install the Board and Load the Device Driver this chapter Attach and Configure the Screw Terminal Panel see Chapter 3 starting on page 33 Wire Signals see Chapter 4 starting on page 39 a Verify the Operation of the Board N C see Chapter 5 starting on page 57 E Note All DT3034 boar
34. 0 Principles of Operation DT740 Screw Terminal A D f A User Clock Input 0 A Q TB58 D D TB60 Signal Source g TB61 D 0 p uS qp TB83 E Digital Ground 0 O External O Gating O O Switch Gate 0 D D o Digital Ground TB108 d UD Digital Shield O D O Figure 30 Connecting Event Counting Signals Shown for Clock Input 0 and External Gate 0 Figure 31 shows an example of an event counting operation In this example the gate type is low level high level disables operation Gate Input low level Signal enables operation External C T Clock a Input Signal 3 events are counted while the operation is enabled event counting event counting operation starts operation stops Figure 31 Example of Event Counting 101 Chapter 6 102 Frequency Measurement Use frequency measurement mode to measure the frequency of the signal from counter s associated clock input source over a specified duration In this mode use an external C T clock source refer to page 96 for more information on the external C T clock source Connect a pulse of a known duration such as a one shot output of another user counter to the external gate input as shown in Figure 32 DT740 Screw Terminal Panel O User Clock Input 0 p
35. 0 0 0 0 0 DI Support SupportsDifferential Yes Yes Yes Yes DI Channels MaxDifferentialChannels 16 2 1 1 0 0 Maximum Channel Gain List Depth CGLDepth 1024 2 T 18 0 0 Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Channel List Inhibit SupportsChannelListlnhibit Yes a Channels 0 to 31 are provided for analog input channel 32 reads all 16 bits from the DIN subsystem b All 16 bits of the DIO lines are assigned to A D input channel 32 While the DIN subsystem itself is incapable of continuous operation continuous DIN operation can be performed by specifying channel 32 in the channel list of the A D subsystem and starting the A D subsystem 115 Chapter 7 Gain Table 14 DT3034 Gain Options DT3034 A D D A DIN DOUT C T QUAD Programmable Gain Support SupportsProgrammableGain Yes Number of Gains NumberOfSupportedGains 4 1 1 0 0 Gains Available SupportedGains 1 2 4 81 1 Ranges Table 15 DT3034 Range Options DT3034 A D D A DIN DOUT C T QUAD Number of Voltage Ranges NumberOfRanges 2 1 0 0 0 0 Available Ranges 10 V SupportedVoltageRanges 0to 10V x10 V Current Output Support SupportsCurrentOutput Resolution Table 16 DT3034 Resolution Options DT3034 A D D A DIN DOUT C T QUAD Software Programmable Resolution SupportsSoftwareResolution Yes Yes Number of Resolutions
36. 0 screw terminal panel for an internal or external reference and how to use the DT3034 Calibration Utility to calibrate the analog input subsystem of the board Choosing a Calibration Reference To calibrate the analog input circuitry you can use either of the following references e The internal 5 V reference on the DT3034 board Using the 5 V reference on the board allows you to calibrate the analog input circuitry quickly without using external equipment the accuracy of the calibration is approximately 0 05 e An external 9 3750 V reference precision voltage source Using an external 9 3750 V reference provides an accuracy of approximately 1 LSB This section describes how to configure for an internal or external reference Configuring for the Internal Reference To calibrate the analog input circuitry using the internal 5 V reference do the following 1 Connect Analog In 0 to 5 V Reference Out Signal DT740 Screw Terminal Analog Input 0 TB1 5 V Reference TB49 2 Connect Analog In 0 Return to Analog Ground Signal DT740 Screw Terminal Analog Input 0 Return TB2 Analog Ground TB34 3 Connect Analog In 1 to Analog In 1 Return and Analog Ground 125 Chapter 8 Signal DT740 Screw Terminal Analog Input 1 TB2 Analog Input 1 Return TB4 Analog Ground TB34 Follow the instructions on page 127 Configuring for an External Referenc
37. 34 board up and running Using the Quick DataAcq application you can verify the features of the board display data on the screen and save data to disk The quickDAQ application An evaluation version of this NET application is included on the Data Acquisition OMNI CD quickDAQ lets you acquire analog data from all devices supported by DT Open Layers for NET software at high speed plot it during acquisition analyze it and or save it to disk for later analysis DT3034 Calibration Utility The DT3034 Calibration Utility allows you to calibrate the analog input and analog output subsystems of the DT3034 board Refer to page 123 for more information on this utility Measure Foundry An evaluation version of this software is included on the Data Acquisition OMNI CD Measure Foundry is drag and drop test and measurement application builder designed to give you top performance with ease of use development Order the full development version of this software package to develop your own application using real hardware DT Open Layers for NET Class Library Use this class library if you want to use Visual C or Visual Basic for NET to develop your own application software for a DT3034 board using Visual Studio 2003 or Visual Studio 2005 the class library complies with the DT Open Layers standard DataAcq SDK Use the Data Acq SDK if you want to use Visual Studio 6 0 and Microsoft C or C to develop your own application software for a DT30
38. 34 board using Windows XP Windows Vista or Windows 7 the DataAcq SDK complies with the DT Open Layers standard DTx EZ DTx EZ provides ActiveX controls which allow you to access the capabilities of the DT3034 board using Microsoft Visual Basic or Visual C DTx EZ complies with the DT Open Layers standard DAQ Adaptor for MATLAB Data Translations DAQ Adaptor provides an interface between the MATLAB Data Acquisition DAQ subsystem from The MathWorks and Data Translation s DT Open Layers architecture LV Link An evaluation version of LV Link is included on the Data Acquisition OMNI CD Use LV Link if you want to use the LabVIEW graphical programming language to access the capabilities of the DT3034 boards Refer to the Data Translation web site ww w datatranslation com for more information on the appropriate software package for your application 18 Overview Accessories The following optional accessories are available for a DT3034 board e DT740 screw terminal panel Screw terminal panel with two connectors to accommodate the analog I O digital I O and counter timer signals provided by the DT3034 board EP307 cable A 1 meter twisted pair shielded cable that connects the 50 pin analog I O connector J1 on the DT3034 board to the J1 connector on the DT740 screw terminal panel e EP308 cable A 1 meter twisted pair shielded cable that connects the 68 pin digital I O connector J2 on the DT3034 board
39. 6 Table 1 Key Features of the DT3034 Board Feature Specification Analog Input Channels 32 single ended or 16 differential Analog I O Resolution 16 bits A D Throughput 500 kSamples s Analog Output Channels 2 D A Throughput 200 kSamples s Output FIFO 4K Digital I O Lines 16 Counter Timers 4 Connectors one 50 pin one 68 pin a This throughput is for a single analog input channel b This throughput is for full scale ranges Programmable bipolar 10 V and unipolar 0 to 10 V input ranges with gains of 1 2 4 and 8 fixed output range of 10 V Continuously paced and triggered scan capability A 1024 location channel list that supports sampling analog input channels at the same or different gains in sequential or random order Up to 256 scans per trigger for a total of 262 144 samples per trigger PCI bus mastering for data transfers Pre post and about trigger acquisition modes to acquire data relative to an external event using computer memory Internal and external clock sources one external clock input for the analog input subsystem and one external clock input for the analog output subsystem Analog threshold triggering using either an external analog input or one of the analog input channels a separate DAC sets the trigger level 8 bit resolution fixed hysteresis Digital TTL triggering one external hardware TTL input for the analog input subsystem and one extern
40. 7 19 Analog Input 06 20 Analog Input 05 21 Analog Input 04 22 Analog Input 03 23 Analog Input 02 24 Analog Input 01 25 Analog Input 00 26 Analog Ground 27 Reserved 28 Reserved 29 Analog Output 1 Return 30 Analog Output 0 Return 31 Reserved 32 Power Ground 33 Shield Ground 34 Analog Ground 35 Analog Input 31 36 Analog Input 30 Analog Input 15 Return Analog Input 14 Return 37 Analog Input 29 38 Analog Input 28 Analog Input 13 Return Analog Input 12 Return 39 Analog Input 27 40 Analog Input 26 Analog Input 11 Return Analog Input 10 Return 41 Analog Input 25 42 Analog Input 24 Analog Input 09 Return Analog Input 08 Return 43 Analog Input 15 44 Analog Input 14 Analog Input 07 Return Analog Input 06 Return Connector Pin Assignments Table 30 Connector J1 Pin Assignments on the DT3034 Board cont Pin Signal Description Pin Signal Description 45 Analog Input 13 46 Analog Input 12 Analog Input 05 Return Analog Input 04 Return 47 Analog Input 11 48 Analog Input 10 Analog Input 03 Return Analog Input 02 Return 49 Analog Input 09 50 Analog Input 08 Analog Input 01 Return Analog Input 00 Return 155 Appendix B 156 Connector J2 on the DT3034 Board Table 31 lists the pin assignments of connector J2 on the DT3034 boards Table 31 Connector J2 Pin Assignments on the DT3034 Board
41. A D sample clock 75 119 internal C T clock 97 119 internal D A output clock 88 internal retrigger clock 77 114 frequency measurement 52 54 102 G gain actual available 116 analog input 74 analog output 88 number of 116 programmable 116 gate type 98 falling edge 98 high edge 120 high level 120 internal 120 logic high level 98 logic low level 98 low edge 120 low level 120 none software 98 rising edge 98 generating continuous pulses 103 H help online 59 high edge gate type 98 120 high level gate type 120 high to low pulse output 99 Host Block Overflow error 86 hysteresis 80 90 j inhibiting data from channels 72 inprocess buffers 114 input configuration differential analog 45 pseudo differential analog 45 single ended analog 45 Input FIFO Overflow error 86 input ranges 74 inserting the board 29 internal clock 119 A D sample 75 C T 97 cascaded C T 97 D A output 88 internal gate type 120 internal retrigger clock 77 J J1 connector pin assignments 154 DT740 screw terminal panel 43 158 J2 connector pin assignments 156 DT740 screw terminal panel 44 159 jumper W1 DT740 36 L LabVIEW 18 layout DT740 36 level gate type high 98 low 98 lines digital I O 72 94 Index loading the device driver Windows 7 31 Windows Vista 31 Windows XP 30 logic high level gate type 98 logic low level gate type 98 low edge gate type 98 120 low level gate type 120 low to high pulse output 99 LV L
42. A Ne URS 31 Windows 35 etu EA ES UE ES ane ea hang needa 8 31 Chapter 3 Attaching and Configuring a Screw Terminal Panel 33 Attaching the DT740 Screw Terminal Panel eee 35 Configuring the DT740 Screw Terminal Panel 36 Configuring Jumper W1 Common Ground Sense 0 00000 ee 36 Configuring Resistors R1 to R16 Bias Return 00000000 37 Configuring Resistors R17 to R32 Current Shunt ooo oococooccccccccccco 37 Chapter 4 Wiring Signals x e x e x e e cece ees 39 Preparing to Wire to a Screw Terminal Panel 41 Wiring Recommendations lt en 41 Screw Terminal Assignment enn 42 Connecting Analog Input Signals eee 45 Connecting Single Ended Voltage Inputs 0 66 cnn eee 45 Connecting Pseudo Differential Voltage Inputs 6 0 c cece eee eee 46 Contents Connecting Differential Voltage Inputs e e 0 000 e eee eee 46 Connecting Current Loop Inputs eee 49 Connecting Analog Output Signals eee 50 Connecting Digital I O Signals sssssssss eh 5 Connecting Counter TimerSignals ssss eh 52 Connecting Event Counting Signals 0 6 0 een eee ee 52 Connecting Frequency Measurement Signals 000000000008 54 Connecting Pulse Output Signals 6 6 6 cee eens 55 Chapter 5 Verifying the Operation of a DT3034 Board 57 Running the Quick DataAcq Application eee 59 Testing Single Valu
43. C T clock source refer to page 96 for more information on the internal C T clock source Use software to specify the counter timer mode as repetitive one shot the polarity of the output pulses high to low transitions or low to high transitions the C T clock source and the gate type to trigger the operation Refer to page 99 for more information on pulse output types and to page 98 for more information on gates Note In the case of a repetitive one shot operation the pulse width is set to 100 automatically Triggers that occur while the pulse is being output are not detected by the board When the one shot operation is triggered determined by the gate input signal a pulse is output When the board detects the next trigger another pulse is output This operation continues until you stop the operation Figure 39 shows an example of a repetitive one shot operation using the DT740 screw terminal panel an external gate rising edge a clock output frequency of 1 KHz one pulse every 1 ms and a low to high pulse type Repetitive One Shot Operation Starts External Gate Signal 1 1 ms period 1 ms period gt p p 100 duty cycle 100 duty cycle 100 duty Pulse cycle Output Signal Figure 39 Example of Repetitive One Shot Mode 107 Chapter 6 108 Synchronizing A D and D A Subsystems You can synchronize the operation of the A D and D A subsystems p
44. C T Clock The internal C T clock uses a 20 MHz time base Counter timer operations start on the rising edge of the clock input signal Through software specify the clock source as internal and the frequency at which to pace the counter timer operation this is the frequency of the clock output signal The maximum frequency that you can specify for the clock output signal is 10 MHz The minimum frequency that you can specify for the clock output signal is 305 18 Hz External C T Clock The external C T clock is useful when you want to pace counter timer operations at rates not available with the internal C T clock or if you want to pace at uneven intervals The rising edge of the external C T clock input signal is the active edge Using software specify the clock source as external and the clock divider used to determine the frequency at which to pace the operation this is the frequency of the clock output signal The minimum clock divider that you can specify is 2 0 the maximum clock divider that you can specify is 65 536 For example if you supply an external C T clock with a frequency of 5 MHz and specify a clock divider of 5 the resulting frequency of the external C T clock output signal is 1 MHz The resulting frequency of the external C T clock output signal must not exceed 2 5 MHz Connect the external C T clock to the board through the DT740 screw terminal panel Table 5 lists the screw terminals that correspond to the external C
45. DATA TRANSLATION UM 22359 L DT3034 User s Manual Eleventh Edition May 2010 Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 508 481 3700 www datatranslation com Fax 508 481 8620 E mail info datx com Copyright 2006 2010 by Data Translation Inc All rights reserved Information furnished by Data Translation Inc is believed to be accurate and reliable however no responsibility is assumed by Data Translation Inc for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent rights of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C F R 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke Drive Marlboro MA 01752 Data Translation is a registered trademark of Data Translation Inc DT Open Layers DT Open Layers for NET Class Library DataAcq SDK Data Acquisition OMNI CD LV Link and DTx EZ are trademarks of Data Translation Inc All other brand and product names are trademarks or registered trademarks of their respective companies Radio and Television I
46. Data Encoding ae ek p e A s eed rte 115 Channels 344i edd ed s eb I deena cece theta pet oe MER RES 115 Grund E RES 116 Ranges 22 209 esee ewe eu M ese sce eso etes Dies 116 Resolution esae thor se I A cael ERE ORE EU A 116 Thermocouple and RTD Support 0000s 117 FE PE Sup port seis sete qu EDU Nt A ania A AL aa oni uis 117 TTP SOLS aso nde di matt ba Rer ew ee hw he CEPS Ur padded ena Ak ANDA AN 118 GlOGKSss o Tort d odes A EE e s o e ee bee diss 119 Countet Titmers u o the ec C Eee WEN Paesi sean is pags 120 Chapter 8 Calibration 000 hh nnn 123 Calibrating the Analog Input Subsystem 6 125 Choosing a Calibration Reference 6 6 c cece eee eens 125 Configuring for the Internal Reference lt 125 Configuring for an External Reference lt 126 Using the DT3034 Calibration Utility 0 6 6 127 Using the Auto Calibration Procedure 0000000008 127 Calibrating the PGH Zero Setting o n nann nan rar nrnr erarnan rrr 129 Calibrating the Analog Output Subsystem oooooocoooocccnncnrnnaannn 130 Choosing a Calibration Meter snr rrrrn r ee 130 Configuring for the Internal ADC 130 Configuring for an External Meter 0 00000 e eee eee eee 131 Using the DT3034 Calibration UY 132 Chapter 9 Troubleshooting e x x e cece eee eee eee 135 General Checklist 136 TeehnicalSuppOtt Id ad ot sd LE dett 138 If Your Board Needs Factory Service ssssssss
47. OMA RT RUD PERE uet CRI MER ORE 93 Digital 1 O Features isa cimo Movies a A toute m a dees bis bs vh Edi LA 94 Digital I Ones ista eme este e n A aque ute REE 94 Digital TZO Resolution i a li enc eee T at ea 94 Digital I O Operation Modes irri K SREE S AAN npes T eh RRR pia e 94 Counter Timer Feat res uv EI ER Eie ER EE RE EE EE S 96 Ini M 96 C T Clock ET c e cos tate be RAE Ea Mer Ba Deere Dis ton dE BRR ENS eee 96 Internal CZ E Clock e rh xe t EE EUER CREE TEE 97 External C T Clock 3x tee t eC Ee E Ai 97 Internally Cascaded Clock s ryssii nys ehes ERDE EEE E e 97 Gate Ty Pes sc xt o et wo rie oat E ce S tob os be tiia 98 Pulse Output Types and Duty Cycles 6 cence eee 99 Counter Timer Operation Modes ee 100 Event Counting aceite sailed tp gb Ee RENNES E dettes eta 100 Frequency Measurement ssssss eh 102 Rate Generation ient eese ve RDUM DA EI ate RES EE SD ER p 103 OneShot ii De re E Gree a pee a er m E S 105 Contents Repetitive One Shot srsti usce e dites e EN 107 Synchronizing A D and D A Subsystems e e ees 108 Synchronizing the Triggers ssas essug R e n s b ak xg op da y rh hee e 108 Synchronizing the Clocks kot ie RR Rue etd te be tele side 109 Chapter 7 Supported Device Driver CapabilitieS 111 Data Flow and Operation Options eh 113 Buffering retire rr RAN CR a mud aee mad esed e sega N 114 Triggered Scan Modest oer LE Ld Cod te Feed he Loops LA did 114
48. Protection Short circuit to Analog Common Power on voltage 0 V 10 mV maximum Settling time to 0 01 of FSR 10 us 20 V step 5 0 us 100 mV step Slew rate 5 V us External D A sample clock Input type Input load High level input voltage Low level input voltage Hysteresis High level input current Low level input current Minimum pulse width Maximum frequency Termination Schmitt trigger falling edge sensitive 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minimum 1 5 V maximum 1 0 uA 1 0 uA 200 ns high 150 ns low 500 kHz 33 Oseries resistor 145 Appendix A Table 24 D A Subsystem Specifications cont Feature DT3034 Specifications External D A digital TTL trigger Input type Schmitt trigger edge sensitive Input load 1 HCT14 TTL High level input voltage 2 0 V minimum Low level input voltage 0 8 V maximum Hysteresis 0 4 V minimum 1 5 V maximum High level input current 1 0 uA Low level input current 1 0 uA Minimum pulse width 100 ns high 100 ns low Termination 33 Q series resistor 146 Specifications Digital I O Specifications Table 25 lists the specifications for the DIN DOUT subsystems on the DT3034 boards Table 25 DIN DOUT Subsystem Specifications Feature Specifications Number of lines 16 bidirectional Number of ports 2 8 bits each High
49. Range Bipolar 10V Unipolar Oto 10V Drift Zero 20 uV 10 uV Gain C Gain 25 ppm C Input impedance Off 100 MQ 10 pF On Differential 100 MQ 100 pF On Single ended 100 MQ 200 pF Input bias current 20 nA Common mode voltage 11 V maximum operational Maximum input voltage 20 V maximum protection A D converter noise 0 5 LSB rms Amplifier input noise 15 0 uV rms 20 uV rms gain 20 0 pA rms current Channel to channel offset 30 0 uV Channel acquisition time typical 1 us to 0 01 A D conversion time 2 0 us 142 Specifications Table 23 A D Subsystem Specifications cont Feature DT3034 Specifications Effective number of bits 1 kHz sine wave 2 channels 10 kHz sine wave 2 channels sine wave 2 channels 14 4 bits typical at 150 kS s aggregate rate 14 2 bits typical at 150 kS s aggregate rate 13 5 bits typical at 150 kS s aggregate rate with sine wave of 20 kHz Total Harmonic Distortion 1 kHz input 82 dB typical at 250 kS s rate Channel crosstalk 80 dB 1 kHz Data throughput Single channel Multiple channel scan 500 kSamples s 0 0196 accuracy 450 kSamples s 0 0196 accuracy External A D sample clock Input type Input load High level input voltage Low level input voltage Hysteresis High level input current Low level input current Minimum pulse width Maximum frequency Termination Schmitt trigger
50. T740 Screw Terminal Panel to the DT3034 Board 35 Chapter 3 Configuring the DT740 Screw Terminal Panel This section describes how to locate and configure the jumpers and resistors on the DT740 screw terminal panel for use with a DT3034 board Figure 4 shows the layout of the DT740 screw terminal panel and shows the location of the jumper and resistors Jumper and Resisto 1 9 17 25 33 41 49 wi p U 0 0 0 0 0 0 0 D 0 O 0 q 0 0 1 to R16 0 0 D D q D D D 0 R17 to R32 y q Q D Q 0 0 0 0 0 0 J1 D 0 8 16 24 32 40 48 56 CTR CTR Trig GND DIO DIO Shield 57 65 73 81 89 97 105 Gnd 0 D 0 0 0 0 q J cxo 0 10 o a D D Out0 0 D Q 0 Gate 0 0 0 0 0 Gnd 1 0 0 0 D D Clk1 Q q D D Out 1 D O 0 0 0 q Gate 1 p p q D Q 64 72 80 88 96 104 112 Figure 4 Layout of the DT740 Screw Terminal Panel Configuring Jumper W1 Common Ground Sense When shipped from the factory jumper W1 connects the low side of the input amplifier Amp Low on the DT3034 board to analog ground When using pseudo differential analog inputs remove jumper W1 and connect Amp Low to a remote common mode voltage to reject offset voltages common to all 32 input channels Refer to page 46 for an example of using jumper W1 36 Attaching and Configuring
51. a 33 Qr resistor is used in series with all digital outputs You must consider this 33 Q resistor if you are matching cable impedance to the far end 167 Appendix C Cabling Information If you are building your own screw terminal panel and or cable refer to Appendix A for connector specifications 168 A A D Over Sample error 86 A D sample clock 74 external 75 internal 75 A D subsystem 71 specifications 142 A D Trigger Out signal 77 78 79 about trigger acquisition mode 84 113 abrupt stop analog input 76 analog output 90 accessories 19 acquisition modes about trigger 84 post trigger 81 pre trigger 82 aliasing 75 analog input channel configuration differential 45 pseudo differential 45 single ended 45 analog input features 71 A D sample clock 74 calibrating 125 channel list 72 channels 71 continuous operations 76 conversion modes 76 data format 85 error conditions 86 gains 74 input ranges 74 resolution 71 single value operations 76 specifications 142 trigger acquisition modes 81 trigger sources 79 analog output features 87 calibrating 130 channel list 88 channels 87 continuous operations 90 conversion modes 90 D A output clock 88 data format and transfer 92 Index error conditions 93 gains 88 output ranges 88 resolution 87 single value operations 90 specifications 145 trigger sources 89 analog threshold trigger 80 90 108 analog input channel 80 90 108 external 80 89 application wirin
52. additional considerations to keep in mind when designing your own screw terminal panel for use with a DT3034 board An index completes this manual Conventions Used in this Manual The following conventions are used in this manual Notes provide useful information or information that requires special emphasis cautions provide information to help you avoid losing data or damaging your equipment and warnings provide information to help you avoid catastrophic damage to yourself or your equipment tems that you select or type are shown in bold Related Information 12 Refer to the following documents for more information on using the DT3034 board Measure Foundry Manual UM 19298 and online help These documents describe how to use Measure Foundry to build drag and drop test and measurement applications for Data Translation data acquisition devices DT Open Layers for NET User s Manual UM 22161 For programmers who are developing their own application programs using Visual C or Visual Basic NET this manual describes how to use the DT Open Layers for NET Class Library to access the capabilities of Data Translation data acquisition devices DataAcq SDK User s Manual UM 18326 For programmers who are developing their own application programs using the Microsoft C compiler this manual describes how to use the DT Open Layers DataAcq SDK to access the capabilities of Data Translation data acquisition boards This
53. al Figure 35 Example of Rate Generation Mode with a 75 Duty Cycle 104 Principles of Operation Continuous Pulse Output Operation Starts External C T Clock Input Signal 4 kHz Pulse Output Signal 25 duty cycle Figure 36 Example of Rate Generation Mode with a 25 Duty Cycle One Shot Use one shot mode to generate a single pulse output signal from the counter when the operation is triggered determined by the gate input signal You can use this pulse output signal as an external digital TTL trigger to start other operations such as analog input or analog output operations When the one shot operation is triggered a single pulse is output then the one shot operation stops All subsequent clock input signals and gate input signals are ignored The period of the output pulse is determined by the clock input signal In one shot mode the internal C T clock source is more useful than an external C T clock source refer to page 96 for more information on the internal C T clock source Using software specify the counter timer mode as one shot the clock source as internal the polarity of the output pulse high to low transition or low to high transition and the gate type to trigger the operation Refer to page 99 for more information on pulse output types and to page 98 for more information on gate types
54. al hardware TTL input for the analog output subsystem Simultaneous analog input and analog output operations running at full speed Software calibration of the analog input and output subsystems Two 8 bit digital ports programmable as inputs or outputs on a per port basis digital inputs can be included as part of the analog input channel list to correlate the timing of analog and digital events digital outputs can drive external solid state relays Overview Two dynamic high speed digital output lines useful for synchronizing and controlling external equipment these dynamic digital output lines are programmable as part of the analog input subsystem using the DataAcq SDK Programmable gate types Programmable pulse output polarities output types and duty cycles A DSample Clock Output and A D Trigger Output signals useful for synchronizing and controlling external equipment For a discussion of these features in detail refer to Chapter 6 starting on page 69 17 Chapter 1 Supported Software The following software is available for use with the DT3034 boards and on the Data Acquisition OMNI CD DT3034 Device Driver The device driver is installed automatically when you install the software from the Data Acquisition OMNI CD You need the device driver to use the DT3034 board with any of the supported software packages or utilities The Quick DataAcq application This application provides a quick way to get a DT30
55. available to provide technical assistance To request technical support go to our web site at http www datatranslation com and click on the Support link When requesting technical support be prepared to provide the following information Your product serial number The hardware software product you need help on The version of the OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and telephone number of your nearest distributor Troubleshooting If Your Board Needs Factory Service If your board must be returned to Data Translation do the following 1 Record the board s serial number and then contact the Customer Service Department at 508 481 3700 ext 1323 if you are in the USA and obtain a Return Material Authorization RMA If you are located outside the USA call your local distributor for authorization and shipping instructions see our web site www datatranslation com for the name and telephone number of your nearest distributor All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the module as follows Wrap the board in an electrically conductive plastic material Handle with ground protection A static discharge can destroy components on the module
56. d circular buffers in computer memory to the output FIFO on the board DT3034 boards act as PCI slaves to the host computer when performing analog output operations The host computer must pack two output samples an even and an odd sample into each transfer to the DT3034 board The even sample is written to the output FIFO first followed by the odd sample If the analog output channel list contains two DACS the even samples 0 2 4 and so on are written to channel entry 0 in the analog output channel list the odd samples 1 3 5 and so on are written to channel entry 1 in the analog output channel list If the analog output channel list contains one DAC all the samples are written to the DAC alternating between even and odd samples Note that for continuously paced analog output operations the data from the circular buffers in host computer memory can wrap multiple times Data is output from each of the buffers on the queue when no more buffers are on the queue the operation stops In waveform generation mode the data from a single circular buffer is written once to the output FIFO on the board wrap mode is single the board then continuously outputs the data That is once all the data in the buffer is written to the output FIFO on the board the host computer is finished transferring data the board recycles the data in the output FIFO without using the bandwidth of the PCI bus or host processor and the process repeats continuously
57. ds are factory calibrated and require no further adjustment prior to installation If you are using the DT3034 board and decide later to recalibrate it refer to page 123 for instructions 24 Installing the Board and Loading the Device Driver Unpacking Open the shipping box and remove the wrapped DT3034 board CAUTION Keep the board in its protective antistatic bag until you are ready to install it this minimizes the likelihood of electrostatic damage Verify that the following items are present e DT3034 data acquisition board Data Acquisition OMNI CD If an item is missing or damaged contact Data Translation If you are in the United States call the Customer Service Department at 508 481 3700 ext 1323 An application engineer will guide you through the appropriate steps for replacing missing or damaged items If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com 25 Chapter 2 26 Setting up the Computer CAUTION To prevent electrostatic damage that can occur when handling electronic equipment use a ground strap or similar device when performing this installation procedure To set up the computer do the following 1 Qi uc AG oN Install the software from the Data Acquisition OMNI CD or Data Translation web site Note If you are using Windows 7 you must install the device driver before installing the
58. e To calibrate the analog input circuitry using an external 9 3750 V reference do the following 1 Connect Analog In 0 to the positive side of the precision voltage source Signal DT740 Screw Terminal Analog Input 0 TB1 2 Connect Analog In 0 Return to the negative side of the precision voltage source Signal DT740 Screw Terminal Analog Input 0 Return TB2 3 Connect Analog In 0 Return to Analog Ground Signal DT740 Screw Terminal Analog Input 0 Return TB2 Analog Ground TB34 4 Connect Analog In 1 and Analog In 1 Return to Analog Ground Signal DT740 Screw Terminal Analog Input 1 TB3 Analog Input 1 Return TB4 Analog Ground TB34 Calibration 5 Follow the instructions on page 127 Note If you have a version of the board without the PBF lead free designator this potentiometer is labelled R4 6 Click Quit when you are finished Once you have finished this procedure continue with Calibrating the Analog Output Subsystem on page 130 Using the DT3034 Calibration Utility Note After switching the power on allow 15 minutes for the board to warm up before calibrating the analog I O subsystems To start the DT3034 Calibration Utility do the following 1 Click Start from the Task Bar 2 Browse to Programs Data Translation Inc Calibration DT3034 Calibration Utility The main menu
59. e If you choose not to use the DT740 screw terminal panel considerations must be given as to how the signals interact in the real world as well as how they interact with each other This appendix describes additional considerations to keep in mind when designing your own screw terminal panel for use with a DT3034 board Using Your Own Screw Terminal Panel Analog Inputs Typical data acquisition boards have three different types of analog input configurations that you can use e Single ended e Pseudo differential Differential Single Ended Inputs With single ended inputs you have the maximum number of inputs but have the worst case noise immunity without external signal conditioning The major problem with this configuration it that you need a common ground between the external inputs and the data acquisition board Even with conditioning consideration must be given to the cable length and how the cable is routed If the cable is over 3 feet you must consider the ringing and cross talk in the cable A typical cable has 30 pF per foot of capacitance If the source impedance is 1 000 O and the cable is 3 feet then the cross talk based on the source impedance is 1 000 Qx 30 pF x 3 ft 90 ns This seems negligible but when you consider that it requires nine time constants to settle within 0 01 the cross talk becomes almost 10 of the time required to settle when switching channels at 100 KHz Coupling must also be consid
60. e Analog Input eh 60 Testing Single Value Analog Output lsssssse eee 61 Testing Continuous Analog Input K K nne 62 Testing Single Value Digital Input e 0 e eee eee eee 63 Testing Single Value Digital Output 0 00 0 64 Testing Frequency Measurement 6 660 c eee eee n 65 Testing Pulse Output axe ich eet ose ae he A Pei etu Mr eg sean Rater DA abut 66 Part 2 Using Your Board iis od a hws OSES ek ate 67 Chapter 6 Principles of Operation x x x e x K x K eee 69 Analog Input Features perre ransana SEEE e en 7i Analog Input Resolution e e nnn 7i Analog Input Channels 2c m m me he e re uu 7i Specifying a Single Channel 000 e eee 71 Specifying One or More Channels 6666 c cece ences 72 Specifying Digital Input Lines in the Analog Input Channel List 72 Performing Dynamic Digital Output Operations e sessen 72 Input Ranges and Gains 000 e eee 74 A D Sample Clock Sources sese aas e e esa eee eee Rem e 74 Internal A D Sample Clock 0000s 75 External A D Sample Clock 0 00 e eee 75 Analog Input Conversion Modes 0600 e eee eee 76 Continuously Paced Scan Mode 00 eee eee 76 Triggered Scan Mode eee e te ele ete Dd 77 Software Retriggered Scan Mode 0000000 77 Externally Retriggered Scan Mode n ununun nnn e eee eee eee 78 TIS BOTS AA A rs Le A etta ced es Meee ae 79 Tipo er DOUCES Loro baut a Bedae Edd Eau TEL Sau ums 79 Software Irig
61. e analog output signals to the board using the screw terminal panel Within each DAC the digital data is double buffered to prevent spurious outputs then output as an analog signal Both DACs power up to a value of 0 V 10 mV Note that resetting the board does not clear the values in the DACs DT3034 boards can output data from a single analog output channel or from two analog output channels The following subsections describe how to specify the channels Specifying a Single Channel The simplest way to output data to a single analog output channel is to specify the channel for a single value analog output operation using software refer to page 90 for more information on single value operations You can also specify a single analog output channel using an analog output channel list described in the next section 87 Chapter 6 Specifying One or More Channels You can specify one or two analog output channels in the analog output channel list either starting with DAC 0 or with DAC 1 Values are output simultaneously to the entries in the channel list Output Ranges and Gains Each DAC on the DT3034 board can output bipolar analog output signals in the range of x10 V Through software specify the range for the entire analog output subsystem as 10 V to 10 V and the gain for each DAC as 1 If you are using a single value operation specify a gain of 1 refer to page 90 for more information on single value operations
62. e location of this potentiometer 14 In the Voltages box select 49 3750 15 Physically adjust potentiometer R12 labelled 1G on the DT3034 board until the display reads 9 3750 V within 0 001 V Figure 41 shows the location of this potentiometer 132 Calibration Note If you want to check the values for intermediate ranges select Display Values in the Mode box and select any of the available ranges the range is then displayed You cannot calibrate intermediate ranges 16 Click Quit when you are finished calibrating the analog output circuitry Once you have finished this procedure the analog output circuitry is calibrated To close the DT3034 Calibration Utility click the close box in the upper right corner of the window 133 Chapter 8 134 General Checklist eere Technical Support co oommo s If Your Board Needs Factory Service Troubleshooting Chapter 9 General Checklist Should you experience problems using the DT3034 board follow these steps 1 Read all the documentation provided for your product Make sure that you have added any Read This First information to your manual and that you have used this information Check the OMNI CD for any README files and ensure that you have used the latest installation and configuration information available Check that your system meets the requirements stated in the README file on the OMNI CD Check that you have installed your ha
63. el J1 connector 43 158 DT740 screw terminal panel J2 connector 44 159 J1 connector 154 J2 connector 156 ports 94 positive threshold trigger 118 post trigger acquisition mode 81 113 power specifications 149 pre trigger acquisition mode 82 113 pseudo differential inputs 45 pulse output duty cycle 99 one shot 105 rate generation 103 repetitive one shot 107 types 99 pulse train output 103 pulse width 99 173 Index 174 Q Quick DataAcq 18 continuous analog input operations 62 frequency measurement operations 65 pulse output operations 66 running 59 single value analog input operations 60 single value analog output operations 61 single value digital input operations 63 single value digital output operations 64 quickDAQ 18 H ranges analog input 74 analog output 88 number of 116 rate generation 120 removing the board 28 repetitive one shot mode 107 repetitive one shot pulse output 120 resistors R1 to R16 37 R17 to R32 37 resolution analog input 71 analog output 87 available 116 digital I O 94 number of 116 programmable 116 retrigger 78 retrigger clock 77 frequency 77 114 retriggered scan mode externally 78 software 77 returning boards to the factory 139 rising edge gate 98 RMA 139 running the Quick DataAcq application 59 S sample clock external A D 75 internal A D 75 sample rate 76 scan mode externally retriggered 78 software retriggered 77 screw terminal panel 19 SDK 18 selecting expan
64. ence Out 50 26 Analog Ground 51 Analog Shield Ground 52 Analog Shield Ground 53 Analog Shield Ground 54 Analog Shield Ground 55 Analog Shield Ground 56 Analog Shield Ground 43 Chapter 4 Table 3 Screw Terminal Assignments for Connector J2 on the DT740 Screw Terminal Panel TB J2Pin Signal Description TB J2 Pin Signal Description 57 51 52 Digital Ground 58 17 User Clock Input 0 59 16 User Counter Output 0 60 50 External Gate 0 61 49 Digital Ground 62 15 User Clock Input 1 63 14 User Counter Output 1 64 48 External Gate 1 65 47 Digital Ground 66 13 User Clock Input 2 67 12 User Counter Output 2 68 46 External Gate 2 69 45 Digital Ground 70 11 User Clock Input 3 71 10 User Counter Output 3 72 44 External Gate 3 73 43 Digital Ground 74 9 External D A Sample Clock In 75 8 External D A TTL Trigger 76 7 External A D Sample Clock In 77 6 External A D TTL Trigger 78 5 A D Trigger Out 79 4 A D Sample Clock Out 80 3 Reserved 81 23 Digital Ground 82 39 41 Digital Ground 28 42 57 62 83 18 Digital Ground 84 65 Reserved 38 40 63 64 85 31 Reserved 86 37 Reserved 87 30 Dynamic Digital Output O 88 29 Dynamic Digital Output 1 89 27 Digital I O Bank A O 90 26 Digital I O Bank A 1 91 25 Digital I O Bank A 2 92 24 Digital I O Bank A 3 93 61 Digital I O Bank A 4 94 60 Digital I O
65. er the board scans the channel list the specified number of times then waits for another software retrigger to occur The process repeats continuously until either the allocated buffers are filled or you stop the operation refer to page 85 for more information on buffers The sample rate is determined by the frequency of the A D sample clock divided by the number of entries in the channel list refer to page 74 for more information on the A D sample clock The conversion rate of each scan is determined by the frequency of the Triggered Scan Counter a 24 bit counter with a 20 MHz clock located on the board Using software specify the retrigger frequency The minimum retrigger frequency is 1 2 Hz The maximum retrigger frequency is 250 kHz 250 kSamples s Specify the retrigger frequency as follows Min Retrigger of CGL entries x of CGLs per trigger 2 us Period A D sample clock frequency Max Retrigger 1 Frequency Min Retrigger Period For example if you are using 512 channels in the channel list scanning the channel list 256 times every trigger or retrigger and using an A D sample clock with a frequency of 1 MHz set the maximum retrigger frequency to 7 62 Hz since 7 62 Hz 1 512 256 2 us 1 MHz 77 Chapter 6 78 To select software retriggered scan mode use software to specify the following parameters The dataflow as Continuous ContinuousPreTrigger or ContinuousPrePostTrigger Trigge
66. er function b Threshold triggers are supported for post trigger acquisition only If you are using an analog threshold trigger for both A D and D A subsystems both triggers must by of the same type that is either both must be from an analog input channel or external analog threshold However the polarities of the two triggers can be different Refer to page 79 for more information Supported Device Driver Capabilities Clocks Table 20 DT3034 Clock Options DT3034 A D D A DIN DOUT C T QUAD Internal Clock Support SupportsinternalClock Yes Yes Yes External Clock Support SupportsExternalClock Yes Yes Yes Simultaneous Input Output on a Single Clock Signal SupportsSimultaneousClocking Base Clock Frequency BaseClockFrequency 20 MHz 20 MHz O 0 20 MHz 0 Maximum Clock Divider MaxExtClockDivider 1 0 1 0 1 0 1 0 65536 JO Minimum Clock Divider MinExtClockDivider 1 0 1 0 1 0 1 0 2 0 0 Maximum Frequency 500 500 10 MaxFrequency kHz kHz o 0 MHz Jo Minimum Frequency 0 005 MinFrequency 1 2Hz 1 2Hz 0 0 Hz 0 a Three conditions are possible e 200 kHz per DAC with full scale steps in continuously paced or waveform generation mode e 500 kHz per DAC with 100 mV steps in waveform generation mode e 500 kHz per DAC with 100 mV steps in continuously paced mode system dependent b If using cascaded timers this value is 5 MHz c Any two adjacent counter timer
67. ered when adjacent channels have high speed signals especially if these signals are TTL type with high speed edges Pseudo Differential Inputs Pseudo differential inputs allow one common mode voltage for all single ended inputs With this type of connection the low side of the instrumentation amplifier is used to sense an external common mode voltage For example if you have a signal conditioning rack the AMP LOW signal connects to the analog common of the external rack The pseudo differential configuration allows you to use the maximum number of input channels while placing an impedance between the external ground and the data acquisition ground or analog common Even if it is 100 Q this impedance provides the bias return currents for the inputs and causes only 10 mA of current to flow with a ground potential difference of 1 V The input bias current is typically in milliamperes This is usually manageable by the common mode range of the instrumentation amplifier and analog ground system Consider the problems with 1 Q of impedance between 1 V of potential difference The resulting 1 A of current causes many problems in the analog signal integrity If itis provided and not used ensure that you connect AMP LOW to the analog common of the data acquisition board or to ground when running in single ended mode 163 Appendix C 164 Differential Inputs Differential inputs offer the maximum noise rejection at the expense of half you
68. es to write to the dynamic digital output lines are 2 0 1 3 Figure 21 shows this configuration Dynamic Digital Dynamic Digital Outputs Channel List Values Line 1 LineO 5 Y 2 1 0 6 L gt 0 0 0 7 L 1 c p 0 1 8 LR 3 L 1 Figure 21 An Example Using Dynamic Digital Outputs As analog input channel 5 is read 1 is output to dynamic digital output line 1 and 0 is output to dynamic output line 0 since 2 in binary format is 10 As analog input channel 6 is read 0 is output to both dynamic digital output lines As analog input channel 7 is read 0 is output to dynamic digital output line 1 and 1 is output to dynamic output line 0 since 1 in binary format is 01 As analog input channel 8 is read 1 is written to both dynamic digital output lines 73 Chapter 6 Input Ranges and Gains Each channel on the DT3034 board can measure unipolar and bipolar analog input signals A unipolar signal is always positive 0 to 10 V on DT3034 boards while a bipolar signal extends between the negative and positive peak values 10 V on DT3034 boards Through software specify the range as 0 to 10 V for unipolar signals or 10 V to 10 V for bipolar signals Note that the range applies to the entire analog input subsystem not to a specific channel DT3034 boards also provide gains 1 2 4 and 8 which are programmable per
69. evice Driver e DT740 screw terminal panel It describes how to wire signals to the board and how to verify the board s operation using the Quick DataAcq application This manual also describes the features of the DT3034 board the capabilities of the DT3034 Device Driver and how to program the DT3034 board using the DT Open Layers for NET Class Library software Troubleshooting and calibration information is also provided Note For information on checking system requirements installing the software and viewing the documentation refer to the README file on the OMNI CD For more information on the class library refer to the DT Open Layers for NET Class Library User s Manual If you are using the DataAcq SDK or a software application to program your device refer to the documentation for that software for more information Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming the DT3034 board for data acquisition operations in Microsoft Windows XP Windows Vista or Windows 7 It is assumed that you have some familiarity with data acquisition principles and that you understand your application How this Manual is Organized This manual is organized as follows Chapter 1 Overview describes the major features of the board as well as the supported software and accessories for the board and provides an overview of the getting started pr
70. f the board completes the transfer of a block of input data to the circular buffer in the host computer before the host computer has finished reading the last block of data The host computer can clear this error If you encounter this error try allocating more buffers or larger buffers If any of these error conditions occurs the board stops acquiring and transferring data to the host computer Note DT Open Layers reports any of these errors as an overrun message Principles of Operation Analog Output Features Two analog output D A subsystems are provided on DT3034 boards The first D A subsystem contains the majority of analog output features The second is dedicated to threshold triggering only refer to page 89 for more information on analog threshold triggering This section describes the following features of the first D A subsystem Analog output resolution Analog output channels Output ranges and gains Output filters D A output clock sources Trigger sources Analog output conversion modes Data formats and transfer Error conditions Analog Output Resolution DT3034 boards have a fixed analog output resolution of 16 bits The analog output resolution cannot be changed in software Analog Output Channels DT3034 boards support two differential analog output channels DACO and DAC1 Use software to specify the channel type Refer to Chapter 4 starting on page 39 for information on how to wir
71. ference within 0 001 V 10 In the Range box select Unipolar and then FS for full scale 11 Click the increment or decrement arrows in the Manual Adjustment box until the display reads 5 V with the internal reference or 49 3750 V with the external reference within 0 0005 V 12 In the Range box select Unipolar and then Zero Calibration 13 Click the increment or decrement arrows in the Manual Adjustment box until the display reads just above 0 V then use the decrement arrow until the first value of 0 V is displayed within 0 0005 V 14 In the Range box select PGH Zero 15 If the displayed value is not 0 0000 V within 0 001 V perform the procedure in the next section otherwise click Quit when you are finished calibrating the analog input circuitry Once you have finished this procedure continue with Calibrating the Analog Output Subsystem on page 130 Note If you are not satisfied with the analog input calibration you can load the factory default settings stored in the EEPROM by clicking Restore in the Factory Settings box Calibrating the PGH Zero Setting PGH Zero is a factory calibrated setting and generally should not need adjustment However if you select PGH Zero in the Range box and a value other than 0 0000 V is displayed do the following to calibrate this setting 1 In the Range box select PGH Zero 2 Physically adjust potentiometer R2 labelled PGZ on the DT3034 board until t
72. fferential inputs 45 digital event trigger 118 digital I O features 94 lines 72 94 operation modes 94 resolution 94 specifications 147 when using your own screw terminal panel 166 167 digital trigger analog input 80 analog output 89 DIN subsystem 94 specifications 147 DOUT subsystem 94 specifications 147 DT3034 Device Driver 18 DT740 19 attaching 35 configuring 36 jumper W1 36 layout 36 resistors R1 to R16 37 resistors R17 to R32 37 DT Open Layers for NET Class Library 18 DTx EZ 18 duty cycle 99 dynamic digital output 72 95 E edge gate type high 98 low 98 encoding data analog input 85 analog output 92 environmental specifications 149 EP307 cable 19 EP308 cable 19 errors hardware analog input 86 analog output 93 event counting 52 54 100 120 expansion slot selection 27 external analog trigger 80 89 external clock 119 A D sample 75 171 Index 172 C T 97 D A output 88 external clock divider maximum 119 minimum 119 external digital trigger analog input 80 analog output 89 external negative digital trigger 118 external positive digital trigger 118 externally retriggered scan mode 78 F factory service 139 falling edge gate 98 features 16 analog input 71 analog output 87 counter timer 96 digital I O 94 formatting data analog input 85 analog output 92 frequency base clock 119 external A D sample clock 75 external C T clock 97 internal A D clock 119 internal
73. g Supported Device Driver Capabilities Table 21 DT3034 Counter Timer Options cont DIN DOUT C T QUAD DT3034 A D D A Gate Rising Edge Type SupportsGateRising Interrupt Driven Operations SupportsInterrupt a For one shot and repetitive one shot operations the pulse width is set automatically to 100 b High edge and low edge are supported for one shot and repetitive one shot modes High level and low level are supported for event counting and rate generation modes 121 Chapter 7 122 Calibrating the Analog Input Subsystem Calibrating the Analog Output Subsystem Calibration 123 Chapter 8 124 The DT3034 boards are calibrated at the factory and should not require calibration for initial use We recommend that you check and if necessary readjust the calibration of the analog input and analog output circuitry on the DT3034 boards every six months The DT3034 Calibration Utility is provided for calibrating DT3034 boards Note Ensure that you installed the DT3034 Device Driver prior to using the DT3034 Calibration Utility Refer to page 30 for more information on loading he device driver This chapter describes how to calibrate the analog input and output subsystems of DT3034 boards using the DT3034 Calibration Utility Calibration Calibrating the Analog Input Subsystem This section describes how to configure the DT74
74. g Figure 8 Connecting Differential Voltage Inputs from a Grounded Signal Source to the DT740 Shown for Channel 0 48 Wiring Signals Connecting Current Loop Inputs Figure 9 shows how to connect a current loop input to the DT740 screw terminal panel Vcc 8 4 to 20 mA DT740 Panel 2S a Analog Input 0 o TBi D m e R17 q TB50 D TB2 Q TB51 Analog Input O D D Return O O R1 oO D D O Analog Ground Analog Shield Use current shunt resistor R17 to convert current to voltage 250 Q for 4 to 20 mA 1 to 5 V The common side of the external loop supply must either connect to analog ground or if needed to a bias return resistor R1 in this case Figure 9 Connecting Current Inputs to the DT740 Shown for Channel 0 49 Chapter 4 Connecting Analog Output Signals Figure 10 shows how to connect analog output voltage signals to the DT740 screw terminal panel DT740 Panel Analog Output 0 f Q TB41 D Load p TB42 0 D qp TB51 A Analog Output 0 D O Return O O O O D 0 D O Analog Shield Figure 10 Connecting Analog Output Voltages to the DT740 Shown for Channel 0 50 Wiring Signals Connecting Digital I O Signals Figure 11 shows how to connect digital input signals to the DT740 screw terminal panel
75. g connecting analog outputs 50 connecting counter timer signals 52 connecting current loop analog inputs 49 connecting differential analog inputs 46 connecting digital I O signals 51 connecting event counting signals 52 54 connecting externally cascaded counter timers 56 connecting pseudo differential analog inputs 46 connecting pulse output signals 55 connecting single ended analog inputs 45 attaching the DT740 35 B banks digital I O 94 base clock frequency 119 BaseClockFrequency 119 bias return resistors DT740 37 binary data encoding 115 bipolar signals 74 block diagram 70 buffers 90 92 114 inprocess flush 114 single wrap mode 114 bus mastering PCI 86 bus slave PCI 92 C C C programs 18 C T clock sources 96 cascaded C T clock 97 external C T clock 97 internal C T clock 97 169 Index 170 C T subsystem 96 specifications 148 cables EP307 19 EP308 19 cabling information 168 calibrating the board 18 analog input subsystem 125 analog output subsystem 130 running the utility 127 cascading counters 97 120 externally 56 CGLDepth 115 channel list analog input 72 analog output 88 channel type differential 71 115 pseudo differential 71 single ended 71 115 channel gain list 72 depth 115 Channel Gain List FIFO 72 channel list inhibit 115 channels analog input 71 analog output 87 counter timer 96 digital I O 94 number of 115 circular buffer 90 92 clock sources external A D sample clock 75 e
76. get uus aa R es eate Roe RT a Tue te scat A leta adu 79 External Digital TTL Trigger 0 0 0 00 000 0000 80 Contents Analog Threshold Trigger sse 80 Trigger Acquisition Modes isssssssssss eh 81 Post Trigger Acquisition sermen naea aaraa E e 81 Pre Trigger Acquisition riia a E e E aA Aa 82 About Trigger Acquisition s s 6c ccc eee ees 84 Data Format and Transfer s 85 Error Conditions 135 hea ees ene ee CODEC E DEN CR OT 86 Analog Output Features issicass cease a am ed er qas ede y das rrpe dades 87 Analog Output Resolution 0c ccc eee 87 Analog Output Channels en 87 Specifying a Single Channel 0 R R cee bieders 87 Specifying One or More Channels 60 cece eens 88 Output Ranges and Gains een 88 D A Output Clock Sources icem mem m eda ce v ce RR eaa ds 88 Internal D A Output Clock sssssessss I 88 External D A Output Clock ssssseeee cor 88 Trigger SOULCES A RP DRE FRE YR aque asi Cesare tog rebate d 89 Software Wis ger io Ree Neb EU SEEN Ier ues Made tp A 89 External Digital TTL Trigger sesssse 00000 89 Analog Threshold Trigger 0 000 ee 89 Analog Output Conversion Modes 0000 eese 90 Continuously Paced Analog Output 6 0 c cece eee 90 Waveform Generation 0 cee ee cee cece cent hh 91 Data Format and Transfer 02 unana nearen areae 92 Error Conditi Ons aa RRA
77. gger as the retrigger An A D Trigger Out signal is provided for your use This signal is high when the A D subsystem is waiting for a trigger and low when a trigger occurs In externally retriggered scan mode this signal stays goes low when the trigger occurs and stays low until the desired number of samples have been acquired then goes high until the external retrigger is generated Triggers A trigger is an event that occurs based on a specified set of conditions DT3034 boards support a number of trigger sources and trigger acquisition modes described in the following subsections Trigger Sources DT3034 boards support the following trigger sources Software trigger External digital TTL trigger Analog threshold trigger This subsection describes these trigger sources in more detail Software Trigger A software trigger event occurs when you start the analog input operation the computer issues a write to the board to begin conversions Specify the software trigger source in software 79 Chapter 6 80 External Digital TTL Trigger For analog input operations an external digital trigger event occurs when the DT3034 board detects either a rising or falling edge on the External A D TTL Trigger input signal connected to screw terminal 77 on the DT740 screw terminal panel The trigger signal is TTL compatible Using software specify the trigger source as an external positive digital TTL trigger for a
78. gh to low transitions or low to high transitions the duty cycle of the output pulses and the gate type that enables the operation Refer to page 99 for more information on pulse output signals and to page 98 for more information on gate types Ensure that the signals are wired appropriately Figure 34 shows one example of connecting a pulse output operation This example uses the DT740 screw terminal panel user counter 0 and a software gate type 103 Chapter 6 DT740 Screw Terminal Panel User Counter Input 0 gt CD User Counter Output 0 D 4 p TB59 D Heater Controller ED THU D Digital Ground B TB83 a D D D D D Signal Source Digital Ground Figure 34 Connecting Rate Generation Signals Shown for Counter Output 0 a Software Gate is Used Figure 35 shows an example of an enabled rate generation operation using an external C T clock source with an input frequency of 4 kHz a clock divider of 4 a low to high pulse type and a duty cycle of 75 The gate type does not matter for this example A 1 kHz square wave is the generated output Figure 36 shows the same example using a duty cycle of 25 Rate Generation Operation Starts External C T Clock Input Signal 4 kHz Pulse 75 duty cycle Output Sign
79. gital Ground CD TB108 Wi D Digital Shield D 0099000009 In this example rising clock edges are D counted while the gate is active D Figure 13 Connecting Event Counting Applications to the DT740 Shown for Clock Input 0 and an External Gate 0 52 Wiring Signals pr D A User Clock Input 0 e 4 TB58 gnal Source p TBet Si 4 Ww oo e a O Digital Ground DT740 Panel 2500609006908 y In this example a software gate is used to start the event counting operation Digital Shield Feige 090999000009 Figure 14 Connecting Event Counting Applications to the DT740 Shown for Clock Input 0 without an External Gate User a User Clock Input 0 vesel Counter is D Output 0 TB59 p Gate 0 G gt ray TB60 Signal Source q TB61 D O 4 plata Groun O a TB62 User Clock g p TB83 va S D TB64 Input 1 D External D Gating O Switch D DT740 Panel O o D 3 Digital Ground D oon D D TB108 Digital Shield O D Note that you can also internally cascade counters using D software if you internally cascade the counters you do not D have to make the external cascading connections Note also
80. gt TB58 y Gate 0 O TB60 Signal Source p TB61 E TBe3 User TB83 OD Counter D Output 1 Digital Ground 9290096505690 Figure 32 Connecting Frequency Measurement Signals Shown for Clock Input O and External Gate 0 In this configuration use software to set up the counter timers as follows 1 Set up one of the counter timers for one shot mode specifying the clock source clock frequency gate type and type of output pulse high or low Set up the counter timer that will measure the frequency for event counting mode specifying the clock source to count and the gate type this should match the pulse output type of the counter timer set up for one shot mode Start both counters events are not counted until the active period of the one shot pulse is generated Read the number of events counted Allow enough time to ensure that the active period of the one shot occurred and that events have been counted Determine the measurement period using the following equation Measurement period 1 Active Pulse Width Clock Frequency Determine the frequency of the clock input signal using the following equation Frequency Measurement Number of Events Measurement Period Principles of Operation Figure 33 shows an example of a frequency measurement operation In this example three events are counted during a duration of 300
81. hannel is to specify the channel for a single value analog input operation using software refer to page 76 for more information on single value operations 71 Chapter 6 72 Specifying One or More Channels DT3034 boards can read data from one or more analog input channels using an analog input channel list You can group the channels in the list sequentially either starting with 0 or with any other analog input channel or randomly You can also specify a single channel or the same channel more than once in the list Using software specify the channels in the order you want to sample them The analog input channel list corresponds to the channel List FIFO on the board You can enter up to 1 024 entries The channels are read in order using continuously paced scan mode or triggered scan mode from the first entry to the last entry in the channel list The board can read the channels in the channel list up to 256 times per trigger for a total of 262 144 samples per trigger using triggered scan mode Refer to page 76 for more information on the supported conversion modes Note If you select an analog input channel as the analog threshold trigger source the channel used for this trigger source must be the first channel specified in the analog input channel list refer to page 80 for more information on this trigger source If you wish you can also use software to inhibit data collection from channels in the channel list T
82. he display reads 0 0000 V 0 001 V Figure 40 shows the location of this potentiometer Potentiometer for PGH Zero PGZ Y R2 e Figure 40 Location of Potentiometer R2 on the DT3034 Board 3 Click Quit when you are finished Once you have finished this procedure continue with the next section 129 Chapter 8 Calibrating the Analog Output Subsystem This section describes how to configure the DT740 screw terminal panel for an internal or external meter and how to use the DT3034 Calibration Utility to calibrate the analog output subsystems of the board Choosing a Calibration Meter To calibrate the analog output circuitry you can use either of the following meters The internal A D converter ADC on the DT3034 board The following sections describe how to configure for calibration using either of the supported meters Configuring for the Internal ADC An external precision meter Using the board s ADC as an input to the analog output circuitry allows you to calibrate the analog output circuitry quickly without using external equipment To calibrate DACO using the internal ADC do the following 1 Connect Analog Out 0 TB41 to Analog In 2 TB5 Signal DT740 Screw Terminal Analog Output 0 TB41 Analog Input 2 TB5 2 Connect Analog Out Return to Analog In 2 Return Signal DT740 Screw Terminal Analog Out
83. hen started both subsystems are triggered and clocked simultaneously External Sample Clocks Using software specify the clock source as the external A D sample clock for the A D subsystem and as the external D A output clock for the D A subsystem Then wire an external sample clock to both the A D subsystem and the D A subsystem Then specify a synchronous trigger source for the A D and D A subsystems refer to page 108 When started both subsystems are triggered and clocked simultaneously 109 Chapter 6 110 Supported Device Driver Capabilities Data Plow and Operation DDDODE pc KT ice Ier ee eee ebee Pee e es 113 AE CEPR m 114 THUppred SES BIODE o oboe uet UH Rer eee aet AA eer prises 114 rco MC M 116 a cuu MERC 115 Dono Ems 116 o gr D E 116 Thermoeouple and RTD Support uc cess ence a RESI reme ks 117 IR SA rio EE 117 ji EAD 118 wol 119 Counter FAT sb eben A Deccan bee e GR EE ERE EE 120 111 Chapter 7 The DT3034 Device Driver provides support for the analog input A D analog output D A digital input DIN digital output DOUT and counter timer C T subsystems For information on how to configure the device driver refer to page 30 Table 8 DT3034 Subsystems DT3034 Total Subsystems on Board 1 A D 2a D A ob DIN DOUT ob 4 C T QUAD 0 a The
84. hen the board detects the selected post trigger event the board stops acquiring pre trigger data and starts acquiring post trigger data If you are using software retriggered scan mode and the post trigger event has not occurred the board continues to acquire pre trigger data using the Triggered Scan Counter to clock the operation If however the post trigger event has occurred the board continues to acquire post trigger data using the Triggered Scan Counter to clock the operation The about trigger operation stops when the specified number of post trigger samples has been acquired or when you stop the operation Refer to page 77 for more information on software retriggered scan mode Figure 26 illustrates continuous about trigger mode using a channel list of two entries channel 0 and channel 1 In this example pre trigger analog input data is acquired on each clock pulse of the A D sample clock scanning the channel list continuously until the post trigger event occurs When the post trigger event occurs post trigger analog input data is acquired continuously on each clock pulse of the A D sample clock Principles of Operation Chano ChanO Chano Chan 0 Chano Chan 0 Chan 1 Chan 1 Chan 1 Chan 1 Chan 1 Chan 1 A D Sample Clock Pre trigger data acquired Post trigger data acquired e 4 Pre trigger event occurs Post trigger event occurs Figure 26 Continuo
85. his feature is useful if you want to discard acquired values from specific entries in the channel list You can enable or disable inhibition for each entry in the analog input channel list If enabled the value is discarded after the channel is read if disabled the value is not discarded after the channel is read Specifying Digital Input Lines in the Analog Input Channel List In addition to the analog input channels you can read the 16 digital I O lines Bank A 0 to 7 and Bank B 0 to 7 of the DT3034 boards using the analog input channel list This feature is particularly useful when you want to correlate the timing of analog and digital events To read these 16 digital I O lines specify channel 32 in the analog input channel list You can enter channel 32 anywhere in the list and can enter it more than once if desired This channel is treated like any other channel in the analog input channel list therefore all the clocking triggering and conversion modes supported for analog input channels are supported for these digital I O lines if you specify them in this manner Performing Dynamic Digital Output Operations Note This feature is supported in the DataAcq SDK It is not supported in the DT Open Layers for NET Class Library Using software you can enable a synchronous dynamic digital output operation for the A D subsystem This feature is particularly useful for synchronizing and controlling external equipment Princi
86. ic for NET programs 18 Visual Basic programs 18 Visual C programs 18 Visual C programs 18 voltage ranges 116 number of 116 W waveform generation mode 91 waveform pattern 91 Windows 7 loading the device driver 31 Windows Vista loading the device driver 31 Windows XP loading the device driver 30 175 Index wiring recommendations when using your own screw terminal panel 161 wiring signals analog outputs 50 counter timer signals 52 current loop analog inputs 49 differential analog inputs 46 digital I O signals 51 event counting signals 52 54 externally cascaded counter timers 56 pseudo differential analog inputs 46 pulse output signals 55 single ended analog inputs 45 writing programs in C C 18 Visual Basic 18 Visual Basic NET 18 Visual C 18 Visual C 18 176
87. ication choose Single Analog Input from the Acquisition menu Select the appropriate DT3034 board from the Board list box In the Channel list box select analog input channel 0 In the Range list box select the range for the channel The default is 10 V Select Differential Click Get to acquire a single value from analog input channel 0 The application displays the value on the screen in both text and graphical form Verifying the Operation of a DT3034 Board Testing Single Value Analog Output To verify that the board can output a single analog output value do the following 1 g e P M gt Connect an oscilloscope or voltmeter to DACO on the board Refer to page 50 for an example of how to connect analog output signals In the Quick DataAcq application choose Single Analog Output from the Control menu Select the appropriate DT3034 board from the Board list box In the Channel list box select analog output channel 0 In the Range list box select the output range of DACO The default is 10 V Enter an output value or use the slider to select a value to output from DACO Click Send to output a single value from DACO The application displays the output value on the screen in both text and graphical form 61 Chapter 5 62 Testing Continuous Analog Input To verify that the board can perform a continuous analog input operation do the following 1 10 11 12 Connect known voltage
88. igger SupportsContinuousPrePostTrigger Yes Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Yes Supports Programmable Synchronization Modes SupportsSynchronization Synchronization Modes SynchronizationMode Interrupt Support SupportsinterruptOnChange Output FIFO Size FifoSize 4K Auto Calibrate Support SupportsAutoCalibrate a All 16 bits of the DIO lines are assigned to A D input channel 32 While the DIN subsystem itself is incapable of continuous operation continuous DIN operation can be performed by specifying channel 32 in the channel gain list of the A D subsystem and starting the A D subsystem 113 Chapter 7 Buffering Table 10 DT3034 Buffering Options DT3034 A D D A DIN DOUT C T QUAD Buffer Support SupportsBuffering Yes Yes Single Buffer Wrap Mode Support SupportsWrapSingle Yes Inprocess Buffer Flush Support SupportsinProcessFlush Yes a The data from the DT3034 board is transferred to the host in 64 byte segments therefore the number of valid samples that can be moved is always a multiple of 64 If the application moves data from the buffer before the module has transferred 64 samples to the host the resulting buffer will contain 0 samples Your application program must deal with these situations when flushing an inprocess buffer
89. igital I O Bank A 6 60 Digital I O Bank A 5 61 Digital I O Bank A 4 62 Digital Ground 63 Digital Ground 64 Digital Ground 65 Reserved 66 Reserved 67 Shield Ground 68 Analog Trigger Return 157 Appendix B Screw Terminal Assignments for the DT740 Table 32 lists the screw terminal assignments for connector J1 on the DT740 screw terminal panel Table 32 Pin Assignments for Connector J1 on the DT740 TB Ji Pin Signal Description TB J1 Pin Signal Description 1 25 Analog Input 00 2 50 Analog Input 08 00 Return 3 24 Analog Input 01 4 49 Analog Input 09 01 Return 5 23 Analog Input 02 6 48 Analog Input 10 02 Return 7 22 Analog Input 03 8 47 Analog Input 11 03 Return 9 21 Analog Input 04 10 46 Analog Input 12 04 Return 11 20 Analog Input 05 12 45 Analog Input 13 05 Return 13 19 Analog Input 06 14 44 Analog Input 14 06 Return 15 18 Analog Input 07 16 43 Analog Input 15 07 Return 17 17 Analog Input 16 08 18 42 Analog Input 24 08 Return 19 16 Analog Input 17 09 20 41 Analog Input 25 09 Return 21 15 Analog Input 18 10 22 40 Analog Input 26 10 Return 23 14 Analog Input 19 11 24 39 Analog Input 27 11 Return 25 13 Analog Input 20 12 26 38 Analog Input 28 12 Return 27 12 Analog Input 21 13 28 37 Analog Input 29 13 Return 29 11 Analog Input 22 14 30 36 Analog Input 30 14 Return 31 10 Analog Input 23 15 32 35 Analog Input 31 15 Return 33 9 Amp Lo
90. ignals to the DT740 screw terminal panel do the following to calibrate the analog output subsystem on the DT3034 board 1 From the main menu of the DT3034 Calibration Utility click Configure and then Board Select the name of the DT3034 board to configure from the combo box and then click OK From the main menu of the DT3034 Calibration Utility click Calibrate and then D A Bo M In the Meter Selection box select the meter that you are using Internal or External Internal is the default In the Mode box select Calibrate In the D A box select DAC 0 In the Voltages box select 9 3750 Qo OON gt Physically adjust potentiometer R15 labelled 0Z on the DT3034 board until the display reads 9 3750 V within 0 001 V Figure 41 shows the location of this potentiometer Potentiometers for the DACs R14 0G R12 1G TF R13 R15 1Z 0Z Figure 41 Location of Potentiometers R12 to R15 on the DT3034 Board 9 In the Voltages box select 49 3750 10 Physically adjust potentiometer R14 labelled 0G on the DT3034 board until the display reads 49 3750 V within 0 001 V Figure 41 shows the location of this potentiometer 11 In the D A box select DAC 1 12 In the Voltages box select 9 3750 13 Physically adjust potentiometer R13 labelled 1Z on the DT3034 board until the display reads 9 3750 V within 0 001 V Figure 41 shows th
91. ink 18 M MaxDifferentialChannels 115 MaxExtClockDivider 119 MaxFrequency 119 MaxMultiScanCount 114 MaxRetriggerFreq 114 MaxSingleEndedChannels 115 Measure Foundry 18 measuring frequency 102 MinExtClockDivider 119 MinFrequency 119 MinRetriggerFreq 114 N negative threshold trigger 118 number of differential channels 115 gains 116 I O channels 115 resolutions 116 scans per trigger 114 single ended channels 115 voltage ranges 116 NumberOfChannels 115 NumberOfRanges 116 NumberOfResolutions 116 NumberOfSupportedGains 116 Nyquist Theorem 75 O one shot mode 105 one shot pulse output 120 online help 59 operation modes continuous digital input 95 continuously paced scan mode 76 event counting 100 externally retriggered scan mode 78 frequency measurement 102 one shot pulse output 105 rate generation 103 repetitive one shot pulse output 107 single value analog input 76 single value analog output 90 single value digital I O 94 software retriggered scan mode 77 waveform generation 91 orderly stop analog input 76 analog output 90 output clock sources external D A output clock 88 internal D A output clock 88 output FIFO 16 90 91 92 output FIFO counter 91 output FIFO underflow error 93 output pulses 120 output ranges 88 outputting pulses continuously 103 one shot 105 repetitive one shot 107 P PCI bus master 86 PCI bus slave 92 physical specifications 149 pin assignments DT740 screw terminal pan
92. input channels are available e Differential Choose this configuration when you want to measure low level signals less than 1 V you are using an A D converter with high resolution greater than 12 bits noise is a significant part of the signal or common mode voltage exists When you choose the differential configuration 16 analog input channels are available Note We recommend that you connect all unused analog input channels to analog ground This section describes how to connect single ended pseudo differential and differential voltage inputs as well as current loop inputs to the screw terminal panels Connecting Single Ended Voltage Inputs Figure 5 shows how to connect single ended voltage inputs to the DT740 screw terminal panel DT740 Panel Jumper W1 Signal Source Installed Amp Low E Vsource N B TB33 0 D TB34 H Analog In 0 Q TB1 D 3 u W1 p TB2 D source Analog In 1 D TB3 O E 1 D D D D O D D O O Analog Ground Figure 5 Connecting Single Ended Voltage Inputs to the DT740 Shown for Channels 0 and 1 45 Chapter 4 46 Connecting Pseudo Differential Voltage Inputs Figure 6 shows how to connect pseudo differential voltage inputs to the DT740 screw terminal panel Signal Source DT740 Panel fisource q TB33 0 Analog In 0 Q 181 Y TB34
93. inuous ContinuousPreTrigger or Continuous PrePostTrigger refer to page 81 for more information about these trigger acquisition modes The initial trigger source depends on the trigger acquisition mode selected refer to page 79 for more information on the supported trigger acquisition modes and trigger sources Principles of Operation Note An A D Trigger Out signal is provided for your use This signal is high when the A D subsystem is waiting for a trigger and low when a trigger occurs In continuously paced scan mode this signal goes low when the trigger occurs and stays low until you stop the operation Triggered Scan Mode DT3034 boards support two triggered scan modes software retriggered and externally retriggered These modes are described in the following subsections Software Retriggered Scan Mode Use software retriggered scan mode if you want to accurately control both the period between conversions of individual channels in a scan and the period between each scan This mode is useful when synchronizing or controlling external equipment or when acquiring a buffer of data on each trigger or retrigger Using this mode you can acquire up to 262 144 samples per trigger 256 times per trigger x 1024 location channel list When it detects an initial trigger the board scans the channel list a specified number of times up to 256 then waits for an software retrigger to occur When the board detects an software retrigg
94. ital Ground E TB83 Q o DT740 Panel 0 External o Gating Q Switch Gate 0 O 3t Digital Ground O D m O Digital Shield dD TB108 D 0 O UD Figure 17 Connecting Pulse Output Applications to the DT740 Screw Terminal Panel Shown for Counter Output 0 and Gate 0 55 Chapter 4 TN Digital Ground D TB57 User M TB58 Counter User Clock Input P D TB59 Output 0 gt q TB60 Signal Source p TB61 P TB 2 O TESS User Clock D Input 1 External Gating DT740 Panel Switch Gate 0 Digital Ground D D emus p o F D TB108 Digital Shield E S D D Note that you can also internally cascade counters using e software if you internally cascade the counters you do not have to make the external cascading connections In this example counter 1 gate is logic high Figure 18 Cascading Counters to the DT740 Shown for Rate Generation Using Counters 0 and 1 and External Gate 0 f Digital Ground User A D ind Counter User Clock Input O s Output 0 i 7 TB59 Signal Source E Q TB61 rans D U User Clock One Shot Digital Ground gt q TB64 Input 1 O Trigger Gate 1 V DT740 Panel O O O Digital Shield Q TB108 igita ie Qo D D O Figure 19 Cascadi
95. its edges and do not touch any of the components on the board 28 Installing the Board and Loading the Device Driver Inserting the DT3034 Board into the Computer Once you have set up the expansion slots do the following to insert the DT3034 board into the computer 1 Position the board so that the cable connectors are facing the rear of the computer as shown in Figure 2 Rear of Computer DT3034 Board PCI Expansion Slot Bus Connector Figure 2 Inserting the DT3034 Board in the Computer 2 Carefully lower the board into the PCI expansion slot using the card guide to properly align the board in the slot 3 When the bottom of the board contacts the bus connector gently press down on the board until it clicks into place CAUTION Do not force the board into place Moving the board from side to side during installation may damage the bus connector If you encounter resistance when inserting the board remove the board and try again 4 Secure the board in place at the rear panel of the system unit using the screw removed from the slot cover 5 Reinstall the cover of the computer Refer to your computer s user s manual for instructions 6 Power up the computer and follow the steps in the next section 29 Chapter 2 Loading the Device Driver To load the DT3034 device driver in Windows XP follow the steps on page 30 Windows Vista follow the steps on page 31 e Windows 7 follow the ste
96. l is received DT3034 boards provide the following gate input types None A software command enables any specified counter timer operation immediately after execution This gate type is useful for all counter timer modes Logic low level external gate input Enables a counter timer operation when the external gate signal is low and disables the counter timer operation when the external gate signal is high Note that this gate type is used only for event counting frequency measurement and rate generation refer to page 100 for more information on these modes Logic high level external gate input Enables a counter timer operation when the external gate signal is high and disables a counter timer operation when the external gate signal is low Note that this gate type is used only for event counting frequency measurement and rate generation refer to page 100 for more information on these modes Falling edge external gate input Enables a counter timer operation on the transition from the high level to the low level falling edge In software this is called a low edge gate type Note that this gate type is used only for one shot and repetitive one shot mode refer to page 107 for information on these modes Rising edge external gate input Enables a counter timer operation on the transition from the low level to the high level rising edge In software this is called a high edge gate type Note that this gate type is used
97. l output line if the bit is not selected a low level signal is output to the digital output line Optionally you can enter an output value in the Hex text box Click Send The application displays the value of each digital output line of digital port B on the screen in both text and graphical form Verifying the Operation of a DT3034 Board Testing Frequency Measurement To verify that the board can perform a frequency measurement operation do the following 1 Wire an external clock source to counter timer 0 on the DT3034 board Refer to page 54 for an example of how to connect a an external clock for a frequency measurement operation Note The Quick DataAcq application works only with counter timer 0 In the Quick DataAcq application choose Frequency Counter from the Acquisition menu Select the appropriate DT3034 board from the Board list box In the Count Duration text box enter the number of seconds during which events will be counted Click Start to start the frequency measurement operation The operation automatically stops after the number of seconds you specified has elapsed and the application displays the frequency on the screen If you want to stop the frequency measurement operation when it is in progress click Stop 65 Chapter 5 Testing Pulse Output To verify that the board can perform a pulse output operation do the following 1 Connecta scope to counter timer 0 on the DT3034 boa
98. level input voltage Low level input voltage Termination 47 kQ resistor pullup to 3 3 V 33 Q series resistor Inputs Input type Level sensitive Input load 1 TTL 1 TTL 2 0 V minimum 0 8 V maximum Output driver high voltage Output driver low voltage High level input current 20 uA Low level input current 9 2 mA Outputs Output driver TTL 2 0 V minimum IOH 15 mA 2 4 V minimum IOH 3 mA 0 5 V maximum IOL 24 mA 0 4 V maximum IOL 12 mA 147 Appendix A 148 Counter Timer Specifications Table 26 lists the specifications for the C T subsystems on the DT3034 boards Table 26 C T Subsystem Specifications Feature Specifications Number of counter timers Clock Inputs Input type Input load High level input voltage Low level input voltage Hysteresis Schmitt trigger rising edge sensitive 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minimum 1 5 V maximum High level input voltage Low level input voltage Hysteresis High level input current Low level input current Minimum pulse width Maximum frequency Termination High level input current 1 0 uA Low level input current 1 0 uA Minimum pulse width 100 ns high 100 ns low Maximum frequency 5 0 MHz Termination 33 Q series resistor Gate Inputs Input type Schmitt trigger level sensitive Input load 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minim
99. ls Table 2 Screw Terminal Assignments for Connector J1 on the DT740 Screw Terminal Panel TB J1Pin Signal Description TB J1 Pin Signal Description 1 25 Analog Input 00 2 50 Analog Input 08 00 Return 3 24 Analog Input 01 4 49 Analog Input 09 01 Return 5 23 Analog Input 02 6 48 Analog Input 10 02 Return 7 22 Analog Input 03 8 47 Analog Input 11 03 Return 9 21 Analog Input 04 10 46 Analog Input 12 04 Return 11 20 Analog Input 05 12 45 Analog Input 13 05 Return 13 19 Analog Input 06 14 44 Analog Input 14 06 Return 15 18 Analog Input 07 16 43 Analog Input 15 07 Return 17 17 Analog Input 16 08 18 42 Analog Input 24 08 Return 19 16 Analog Input 17 09 20 41 Analog Input 25 09 Return 21 15 Analog Input 18 10 22 40 Analog Input 26 10 Return 23 14 Analog Input 19 11 24 39 Analog Input 27 11 Return 25 13 Analog Input 20 12 26 38 Analog Input 28 12 Return 27 12 Analog Input 21 13 28 37 Analog Input 29 13 Return 29 11 Analog Input 22 14 30 36 Analog Input 30 14 Return 31 10 Analog Input 23 15 32 35 Analog Input 31 15 Return 33 9 Amp Low 34 34 Analog Ground 35 8 Analog Shield Ground 36 33 Analog Shield Ground 37 7 15 V Output 38 32 Power Ground 39 6 15 V Output 40 31 Reserved 41 5 Analog Output 0 42 30 Analog Output 0 Return 43 4 Analog Output 1 44 29 Analog Output 1 Return 45 3 Reserved 46 28 Reserved 47 2 Reserved 48 27 Reserved 49 1 5 V Refer
100. ly or as a one shot Savethe input data to disk This chapter describes how to install and run the Quick DataAcq application 58 Verifying the Operation of a DT3034 Board Running the Quick DataAcq Application The Quick DataAcq application is installed automatically when you install the driver software To run the Quick DataAcq application do the following 1 If you have not already done so power up your computer and any attached peripherals 2 Click Start from the Task Bar 3 Browse to Programs Data Translation Incl DT Open Layers for Win32 QuickDataAcq The main menu appears Note The Quick DataAcq application allows you to verify basic operations on the board however it may not support all of the board s features For information on each of the features provided use the online help for the Quick DataAcq application by pressing F1 from any view or selecting the Help menu If the system has trouble finding the help file navigate to C Program Files Data Translation Win32 dtdataacq hlp where C is the letter of your hard disk drive 59 Chapter 5 60 Testing Single Value Analog Input To verify that the board can read a single analog input value do the following 1 Connect a voltage source such as a function generator to analog input channel 0 differential mode on the DT3034 board Refer to page 46 for an example of how to connect a differential analog input In the Quick DataAcq appl
101. manual is provided on the Data Acquisition OMNI CD About this Manual e DTx EZ Getting Started Manual UM 15428 This manual available from Data Translation describes how to use the ActiveX controls provided in DTx EZ to access the capabilities of Data Translation data acquisition boards in Microsoft Visual Basic or Visual C e LV Link Online Help This help file describes how to use LV Link with the LabVIEW graphical programming language to access the capabilities of Data Translation data acquisition devices e PCI Specification PCI Local Bus Specification PCI Special Interest Group Portland OR Revision 2 1 June 1 1995 Microsoft Windows XP Windows Vista or Windows 7 documentation Where To Get Help Should you run into problems installing or using a DT3034 board our Technical Support Department is available to provide prompt technical assistance Refer to Chapter 9 starting on page 135 for more information If you are outside the U S or Canada call your local distributor whose number is listed on our web site www datatranslation com 13 About this Manual 14 Overview Featibes cesset dha EN R NTE ee E E RRR ARN RR ade Eres d 16 PUP POs SOME e eee aoe rede HER Oque e tegmen sde tar 18 JADUGESDIIBS rad da Oaks ERR eR Re ahve wed A ate ERA abe nee and R S 19 20 Getting Started Procedure 15 Chapter 1 Features Table 1 lists the key features of the DT3034 board 1
102. mers Y Y Clk 16 bit ea PCI Bus Interface mM gt Figure 20 Block Diagram of the DT3034 Board 70 Principles of Operation Analog Input Features This section describes the features of the analog input A D subsystem including the following Analog input resolution Analog input channels Input ranges and gains A D sample clock sources Analog input conversion modes Trigger sources and trigger acquisition modes Data formats and transfer Error conditions Analog Input Resolution DT3034 boards have a fixed analog input resolution of 16 bits The analog input resolution cannot be changed in software Analog Input Channels DT3034 boards support 32 single ended or pseudo differential analog input channels or 16 differential analog input channels Refer to Chapter 4 starting on page 39 for a description of how to wire these signals Use software to specify the channel type Note For pseudo differential inputs specify single ended in software in this case how you wire these signals determines the configuration DT3034 boards can acquire data from a single analog input channel or from a group of analog input channels Channels are numbered 0 to 31 for single ended and pseudo differential inputs and 0 to 15 for differential inputs The following subsections describe how to specify the channels Specifying a Single Channel The simplest way to acquire data from a single c
103. ms The frequency then is 10 Hz since 10 Hz 3 3 s 3 Events Counted External C T Clock Input Signal uH Duration over which the frequency is measured 300 ms frequency measurement frequency starts measurement stops Figure 33 Example of Frequency Measurement Rate Generation Use rate generation mode to generate a continuous pulse output signal from the counter this mode is sometimes referred to as continuous pulse output or pulse train output You can use this pulse output signal as an external clock to pace other operations such as analog input analog output or other counter timer operations While the pulse output operation is enabled the counter outputs a pulse of the specified type and frequency continuously As soon as the operation is disabled rate generation stops The period of the output pulse is determined by the clock input signal and the external clock divider If you are using one counter not cascaded you can output pulses using a maximum frequency of 10 MHz this is the frequency of the clock output signal In rate generation mode either the internal or external C T clock input source is appropriate depending on your application refer to page 96 for more information on the C T clock source Using software specify the counter timer mode as rate generation rate the C T clock source as either internal or external the polarity of the output pulses hi
104. n The A D sample clock paces the acquisition of each channel in the channel list this clock is also called the A D pacer clock Note If you enter digital I O channel 32 in the channel list the A D sample clock internal or external also paces the acquisition of the 16 digital input lines The following subsections describe the internal and external A D sample clocks in more detail Internal A D Sample Clock The internal A D sample clock uses a 20 MHz time base Conversions start on the falling edge of the counter output the output pulse is active low Using software specify the clock source as internal and the clock frequency at which to pace the operation The minimum frequency supported is 1 2 Hz 1 2 Samples s The maximum frequency supported is 500 kHz 500 kSamples s According to sampling theory Nyquist Theorem specify a frequency that is at least twice as fast as the input s highest frequency component For example to accurately sample a 20 kHz signal specify a sampling frequency of at least 40 KHz Doing so avoids an error condition called aliasing in which high frequency input components erroneously appear as lower frequencies after sampling Note You can access the output signal from the A D sample clock using screw terminal 79 on the DT740 screw terminal panel External A D Sample Clock The external A D sample clock is useful when you want to pace acquisitions at rates not available with the in
105. n is 16 digital I O lines 0 to 7 of Bank B are represented as bits 8 to 15 of the digital value Digital I O Operation Modes DT3034 boards support the following digital I O operation modes Single value operations are the simplest to use but offer the least flexibility and efficiency Use software to specify the digital I O line and a gain of 1 the gain is ignored Data is then read from or written to the digital I O line For a single value operation you cannot specify a clock or trigger source Single value operations stop automatically when finished you cannot stop a single value operation 94 Principles of Operation Continuous digital input takes full advantage of the capabilities of the DT3034 boards In this mode you enter all 16 digital input lines as channel 32 of the analog input channel list using software This mode is programmed through the A D subsystem Using this mode you can specify a clock source scan mode trigger source trigger acquisition mode and buffer for the digital input operation Refer to page 72 for more information on specifying digital input lines for a continuous digital input operation Dynamic digital output supported by the DataAcq SDK only is useful for synchronizing and controlling external equipment and allows you to output data to two dynamic digital output lines each time an analog input value is acquired This mode is programmed through the A D subsystem refer to page 72 for
106. ndows needs your permission to continue appears Click Continue The Windows Security dialog box appears Click Install this driver software anyway The driver files are installed Open the Control Panel Double click the Open Layers Control Panel icon Select the DT3034 board to configure and then click Advanced By default the prompt Handles Overloaded Bus is checked If you are using an Optiplex computer or experience timing problems with your DT3034 board uncheck this box When you are finished click Close Once you have finished loading the device driver perform the steps in Chapter 3 starting on page 33 to attach and configure the screw terminal panel Windows 7 Once you have installed the software from the Data Acquisition OMNI CD installed a DT3034 board and powered up the host computer the hardware is found automatically Perform the following steps to configure the device driver 1 2 3 5 Open the Control Panel Double click the Open Layers Control Panel icon Select the DT3034 board to configure and then click Advanced By default the prompt Handles Overloaded Bus is checked If you are using an Optiplex computer or experience timing problems with your DT3034 board uncheck this box When you are finished click Close Once you have finished loading the device driver perform the steps in Chapter 3 starting on page 33 to attach and configure the screw terminal panel 31 Chap
107. ng Counters for the DT740 Shown for One Shot Using Counters 0 and 1 and External Gate 1 56 Y Verifying the Operation of a DT3034 Board Running the Quick DataAcq Application 6606 cece eee e 59 Testing omple yalue Analog Input eee errente nepa se Fere ees RI pd 60 Testing Single Value Analog Output nesie e E 61 Testing Continuous Anales Input scienee tio e ex a R 62 Testing Sing leValue Mie tal Topul TTT 63 Testing omete Yalue Digital Clot cota eere er ee teme een teet ies 64 Testing Prequericy Meastwemient o oscri oceno tini euE ra er ee E 65 Testing Pulse CUIDE epeei rese SE sept os DE eene ote Feet end a 66 57 Chapter 5 Install the Board and Load the Device Driver see Chapter 2 starting on page 23 Attach and Configure the Screw Terminal Panel see Chapter 3 starting on page 33 Wire Signals see Chapter 4 starting on page 39 Verify the Operation of the Board ON this chapter al You can verify the operation of a DT3034 board using the Quick DataAcq application Quick DataAcq allows you to do the following Acquire data from a single analog input channel or digital input port Acquire data continuously from one or more analog input channels using an oscilloscope strip chart or Fast Fourier Transform FFT view Measure the frequency of events Output data from a single analog output channel or digital output port Output pulses either continuous
108. nications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le Minist re des Communications du Canada Table of Contents About this Manual isens e enaa a a ehh nnn 11 Intended Audiences ia eden ebbe a eee wre ed 11 How this Manual is Organized 11 Conventions Used in this Manual 0 Ra aR eee teen ene eae 12 Related Information 20r El eee ee yee ede eed OE ed e Fee e ad 12 Where Lo Get Help ii uam et eia d sis E EA cbr ed 13 Chapter 1 Overview ooooooccccconn Rh hh n hn 15 E atutes e UE e e OR E RES Ee Oe iR eie RU 16 Supported Software eee REGIE We rupe o NI He e en rece ete 18 Accessories LL eR a i XH IS ASAS Re EAR 19 Getting Started Procedure ssr ir ore a E EE nee eee eee 20 Part 1 Getting Started vaccine Vache 21 Chapter 2 Installing the Board and Loading the Device Driver 23 Unpacking cec tre ERE Seite UC EUR Tee E RR e RE HR 25 Setting up the Comp lter cessisse ve i p xe per NAER PURO d Ra eel ls 26 Setting up Expansion Slots s eet eade er pU E ER reti eade ded 27 Removing the Board for Handling s 28 Inserting the DT3034 Board into the Computer 6 eens 29 Loading the Device Driver ec re e EUR ttu 30 Windows XE ee UE EROR E EHE ER HERR RR DAR 30 Windows Vistas eb e PEU Rue ld ed eA RR E E
109. ning applications The supply on the DT3034 board is current limited through a 10 O resistor and is specified for a maximum load current of 3 mA Screw terminal TB49 45 0 V reference on the DT740 screw terminal panel is also current limited through a 10 Qresistor and is provided for applications that require a reference less than 1 mA Screw terminal TB112 5 V output on the DT740 screw terminal panel is current limited through a series 10 Q resistor and supports loads up to 100 mA Note that you must take the drop current I multiplied by resistance R across the series 10 Ga resistor 1 V at 100 mA into consideration To provide maximum signal integrity screw terminals TB35 TB36 and TB51 to TB56 on the DT740 screw terminal panel have been reserved for external shield connections from the J1 connector Screw terminals TB105 and TB108 on the DT740 screw terminal panel have been reserved for external shield connections from the J2 connector In addition multiple ground connections have been allocated for all the digital and clock signals for proper shielding and current capacity Note If you are connecting a high speed clock to the DT740 it is recommended that you connect the return to the adjacent ground screw terminal Table 2 lists the screw terminal assignments for connector J1 on the DT740 screw terminal panel Table 3 lists the screw terminal assignments for connector J2 on the DT740 screw terminal panel Wiring Signa
110. nterference This equipment has been tested and found to comply with CISPR EN55022 Class A and EN61000 6 1 requirements and also 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 harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Changes or modifications to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing interference to radio television and other electronic devices Canadian Department of Communications Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Commu
111. oHighPulse 120 SupportsNegExternalTTLTrigger 118 SupportsNegThreshold Trigger 118 SupportsOneShot 120 SupportsOneShotRepeat 120 SupportsPosExternalTTL Trigger 118 SupportsPosThresholdTrigger 118 SupportsProgrammableGain 116 SupportsRateGenerate 120 SupportsSimultaneousStart 113 SupportsSingleEnded 115 SupportsSingleValue 113 SupportsSoftwareResolution 116 SupportsSoftwareTrigger 118 SupportsTriggeredScan 114 SupportsVariablePulseWidth 120 SupportsWrapSingle 114 T technical support 138 threshold level 80 90 threshold trigger analog input channel 80 90 108 external 80 89 negative 118 positive 118 throughput maximum 119 minimum 119 transferring data analog input 85 analog output 90 92 trigger acquisition modes about trigger 84 post trigger 81 pre trigger 82 trigger sources analog input channel 80 90 108 analog threshold trigger 80 89 external digital TTL trigger 80 89 software trigger 79 89 triggered scan 77 114 number of scans per trigger 114 retrigger frequency 114 Triggered Scan Counter 77 triggers external negative digital 118 external positive digital 118 negative analog threshold 118 positive analog threshold 118 software 118 troubleshooting procedure 136 technical support 138 troubleshooting table 136 TTL trigger analog input 80 analog output 89 U unipolar signals 74 units counter timer 96 unpacking 25 using your own screw terminal panel 161 V variable pulse width 120 Visual Bas
112. ocedure e Chapter 2 Installing the Board and Loading the Device Driver describes how to install the DT3034 board and load the DT3034 Device Driver e Chapter 3 Attaching and Configuring a Screw Terminal Panel describes how to attach the DT740 screw terminal panel to a DT3034 board and how to configure the screw terminal panel for use with a DT3034 board Chapter 4 Wiring Signals describes how to wire signals to a DT3034 board using the DT740 screw terminal panel 11 About this Manual Chapter 5 Verifying the Operation of a DT3034 Board describes how to verify the operation of a DT3034 board with the Quick DataAcq application Chapter 6 Principles of Operation describes all of the board s features and how to use them in your application Chapter 7 Supported Device Driver Capabilities lists the data acquisition subsystems and the associated features accessible using the DT3034 Device Driver Chapter 8 Calibration describes how to calibrate the analog I O circuitry of the board Chapter 9 Troubleshooting provides information that you can use to resolve problems with the board and the device driver should they occur Appendix A Specifications lists the specifications of the board Appendix B Connector Pin Assignments shows the pin assignments for the connectors on the board and for the DT740 screw terminal panel Appendix C Using Your Own Screw Terminal Panel describes
113. on The application displays the values acquired from each channel in a unique color on the oscilloscope view Click Stop from the Toolbar to stop the operation Verifying the Operation of a DT3034 Board Testing Single Value Digital Input To verify that the board can read a single digital input value do the following 1 gu m m Connect a digital input to digital input line 0 of port A on the DT3034 board Refer to page 51 for an example of how to connect a digital input In the Quick DataAcq application choose Digital Input from the Acquisition menu Select the appropriate DT3034 board from the Board list box Select digital input port A by clicking Port A Click Get The application displays the value of each digital input line in port A on the screen in both text and graphical form 63 Chapter 5 64 Testing Single Value Digital Output To verify that the board can output a single digital output value do the following 1 guo m m Connect a digital output to digital output line 0 of port B on the DT3034 board Refer to page 51 for an example of how to connect a digital output In the Quick DataAcq application choose Digital Output from the Control menu Select the appropriate DT3034 board from the Board list box Select digital output port B by clicking Port B Click the appropriate bits to select the digital output lines to write to If the bit is selected a high level signal is output to the digita
114. or the retrigger specify either an external digital TTL trigger When the retrigger occurs the board scans the channel list the specified number of times then waits for another external retrigger to occur The process repeats continuously until either the allocated buffers are filled or you stop the operation refer to page 85 for more information on buffers The conversion rate of each channel is determined by the frequency of the A D sample clock refer to page 74 for more information on the A D sample clock The conversion rate of each scan is determined by the period between external retriggers therefore it cannot be accurately controlled The board ignores external triggers that occur while it is acquiring data Only external retrigger events that occur when the board is waiting for a retrigger are detected and acted on Principles of Operation To select externally retriggered scan mode use software to specify the following parameters The dataflow as Continuous Triggered scan mode as enabled Theretrigger source as an external digital TTL trigger The number of times to scan per trigger or retrigger also called the multiscan count Note If you are using an external trigger source as the initial trigger and want to retrigger externally specify the same trigger source as the retrigger For example if you are using an external digital TTL trigger as the initial trigger specify the external digital TTL tri
115. ples of Operation Two dynamic digital output lines are provided 0 and 1 These lines are set to a value of 0 on power up a reset does not affect the values of the dynamic digital output lines Note that these lines are provided in addition to the other 16 digital I O lines see page 94 for more information on the digital I O features Using software specify the values to write to the dynamic digital output lines using the analog input channel list As each entry in the analog input channel list is read the corresponding value you specified is output to the dynamic digital output lines For DT3034 boards you can specify the following values for the dynamic digital output lines 0 00 in binary format 1 01 in binary format 2 10 in binary format or 3 11 in binary format where a value of 1 means that the line goes high and a value of 0 means that the line goes low Each bit in binary format corresponds to the value to write to the dynamic digital output line For example a value of 1 01 in binary format means that a value of 1 is output to dynamic digital output line 0 and value of 0 is output to dynamic output line 1 Similarly a value of 2 10 in binary format means that a value of 0 is output to dynamic digital output line 0 and value of 1 is output to dynamic output line 1 For example assume that the analog input channel list contains channels 5 6 7 8 that dynamic digital output operations are enabled and that the valu
116. ps on page 31 Windows XP Once you have installed the software from the Data Acquisition OMNI CD installed a DT3034 board and powered up the host computer the New Hardware Found dialog box appears Do the following to load the device driver in Windows XP 1 2 3 4 5 6 10 11 12 Click Next Click Search for a suitable driver for my device recommended Click Specify a location and click Next Browse to Windows Inf DT3034 Inf and then click Open Click OK Click Next The files are copied Click Finish Open the Control Panel Double click the Open Layers Control Panel icon Select the DT3034 board to configure and then click Advanced By default the prompt Handles Overloaded Bus is checked If you are using an Optiplex computer or experience timing problems with your DT3034 board uncheck this box When you are finished click Close Once you have finished loading the device driver perform the steps in Chapter 3 starting on page 33 to attach and configure the screw terminal panel 30 Installing the Board and Loading the Device Driver Windows Vista Once you have installed the software from the Data Acquisition OMNI CD installed a DT3034 board and powered up the host computer the New Hardware Found dialog box appears Do the following to load the device driver in Windows Vista 1 8 Click Locate and install driver software recommended The popup message Wi
117. put Return TB42 Analog Input 2 Return TB6 To calibrate DAC1 using the internal ADC do the following 1 Connect Analog Out 1 to Analog In 3 130 Signal DT740 Screw Terminal Analog Output 1 TB43 Analog Input 3 TB7 Calibration 2 Connect Analog Out Return to Analog In 3 Return Signal DT740 Screw Terminal Analog Output 1 Return TB44 Analog Input 3 Return TB8 Follow the instructions on page 132 Configuring for an External Meter To calibrate DACO using an external voltage meter do the following 1 Connect Analog Out 0 to the positive side of the precision voltage meter Signal DT740 Screw Terminal Analog Output 0 TB41 2 Connect Analog Out 0 Return to the negative side of the precision voltage meter Signal DT740 Screw Terminal Analog Output 0 Return TB42 To calibrate DAC1 using an external voltage meter do the following 1 Connect Analog Out 1 to the positive side of the precision voltage meter Signal DT740 Screw Terminal Analog Output 1 TB43 2 Connect Analog Out 1 Return TB44 to the negative side of the precision voltage meter Signal DT740 Screw Terminal Analog Output 1 Return TB44 131 Chapter 8 Using the DT3034 Calibration Utility Once the DT3034 Calibration Utility is running and you have connected the required calibration s
118. r buffers that you allocate in software It is recommended that you allocate a minimum of two buffers for analog input operations and add them to the subsystem queue using software Data is written to the queued input buffers continuously when no more empty buffers are available on the queue the operation stops The data is gap free Error Conditions DT3034 boards can report the following analog input error conditions to the host computer A D Over Sample Indicates that the A D sample clock rate is too fast This error is reported if a new A D sample clock pulse occurs while the ADC is busy performing a conversion from the previous A D sample clock pulse The host computer can clear this error To avoid this error use a slower sampling rate Input FIFO Overflow Indicates that the analog input data is not being transferred fast enough from the Input FIFO across the PCI bus to the host computer This error is reported when the Input FIFO becomes full the board cannot get access to the PCI bus fast enough The host computer can clear this error but the error will continue to be generated if the Input FIFO is still full To avoid this error close other applications that may be running while you are acquiring data If this has no effect try using a computer with a faster processor or reduce the sampling rate Host Block Overflow Indicates that the host computer is not handling data from the board fast enough This error is reported i
119. r event occurs ChanO Chan2 ChanO Chan 2 Chano Chan 2 ChanO Chan 1 Chan 1 Chan 1 A D Sample Clock Board waits for Pre trigger event occurs retrigger event Retrigger event occurs Post trigger even pre trigger data is pre trigger data is Occurs acquisitio acquired for two scans of acquired until stops the channel list post trigger event Occurs Figure 25 Continuous Pre Trigger Mode with Triggered Scan 83 Chapter 6 84 About Trigger Acquisition Use about trigger acquisition mode when you want to acquire data both before and after a specific external event occurs This operation is equivalent to doing both a pre trigger and a post trigger acquisition Using software specify the following parameters The dataflow as ContinuousPrePostTrigger The pre trigger source as Software The post trigger source as the external digital TTL trigger or the external analog threshold trigger e If you are using triggered scan mode the retrigger source as Software Refer to page 76 for more information on the supported conversion modes refer to page 79 for information on the supported trigger sources Note When using about trigger acquisition you cannot use an external retrigger in triggered scan mode refer to page 77 for more information on triggered scan mode The about trigger acquisition starts when you start the operation W
120. r total channel count For the best results shielded twisted pairs are a must The shield must connect at one end so that ground currents do not travel over the shield In low level voltage applications differential inputs reduce problems not only due to electrostatic and magnetic noise but due to cross talk and thermal errors One problem to consider with differential inputs is the bias current error The differential impedance is usually hundreds of megaohms With a very small bias current multiplied by this high input impedance the voltage produced is out of the common mode input range of the instrumentation amplifier An external resistor must be provided to return this bias current to the analog common of the data acquisition board This resistor is typically in the order of 1 kQ to 100 kQ from the input low side to analog common Alternatively the external common can be returned through a 10 Qto 100 kOresistor to analog common it cannot be 0 Q due to ground currents Using Your Own Screw Terminal Panel Analog Outputs Most data acquisition boards have a minimum of two analog output channels with a resolution of 12 to 16 bits even though the accuracy may be less On all Data Translation boards we ensure that the analog outputs do not break into a high frequency oscillation with high capacitance loads that may be experienced with long cables Typically the analog outputs drive 1 000 pF without degradation and bandwidth limit wi
121. range from 2 to 2 048 samples Specify both DACs in the analog output channel list When it detects a trigger the board cycles through the analog output channel list converting and outputting the specified waveform for the specified DACs When the output FIFO empties the board issues a retransmit pulse to the output FIFO This allows the board to output the same pattern continuously to the DACs without having to reload the output FIFOs The buffer wrap mode must be single in this mode refer to page 92 for more information on buffers 91 Chapter 6 92 The conversion rate is determined by the frequency of the D A output clock The maximum throughput rate in this mode is 500 kHz 500 kSamples s in 100 mV steps or 200 kHz 200 kSamples s in full scale steps Refer to page 88 for more information on the D A output clock To select waveform generation mode use software to specify the following parameters Set the dataflow to Continuous e Set WrapSingleBuffer to True to use a single buffer Set the trigger source to any of the supported trigger sources Refer to page 89 for more information on the supported trigger sources Data Format and Transfer Data from the host computer must use offset binary data encoding for analog output signals such as 0000 to represent 40 V and FFFFh to represent 10 V Using software specify the data encoding as binary The host computer transfers data as 32 bit words from one or more allocate
122. rd Refer to page 55 for an example of how to connect a scope a pulse output to counter timer 0 Note The Quick DataAcq application works only with counter timer 0 2 In the Quick DataAcq application choose Pulse Generator from the Control menu 3 Select the appropriate DT3034 board from the Board list box 4 Select either Continuous to output a continuous pulse stream or One Shot to output one pulse 5 Select either Low to high to output a rising edge pulse the high portion of the total pulse output period is the active portion of the signal or High to low to output a falling edge pulse the low portion of the total pulse output period is the active portion of the signal 6 Enter a percentage or use the slider to select a percentage for the pulse width The pulse width determines the duty cycle of the pulse 7 Click Start to generate the pulse s The application displays the results both in text and graphical form 8 ClickStop to stop a continuous pulse output operation One shot pulse output operations stop automatically 66 Part 2 Using Your Board D Principles of Operation Aralo Input Pearubgl copre esce E A ne pede asi qe t erede ten 7 Analoge Output Fenes arias cnet dane ehEUeREPE RUE epe e ne diee tb oe ten 87 Digital I O Peas oc cce teer Re RIDES y ee Er Ee pa C RE Er REFUS 94 Counter Timer Features ci hoe cca tree eck ep Eee ia 96 Synchronizing AD and D A Subsystems x ae 0 R er e ee ree v
123. rdware properly using the instructions in Chapter 2 Check that you have installed and configured the device driver properly using the instructions in Chapter 2 Search the DT Knowledgebase in the Support section of the Data Translation web site at www datatranslation com for an answer to your problem If you still experience problems try using the information in Table 22 to isolate and solve the problem If you cannot identify the problem refer to page 138 Table 22 Troubleshooting Problems respond Board does not Symptom Possible Cause Possible Solution The board configuration is Check the configuration of your device driver to incorrect ensure that the board name and type are correct The board is incorrectly aligned Check that the slot in which your DT3034 board is in a PCI expansion slot located is a PCI slot and that the board is correctly seated in the slot The board is damaged Contact Data Translation for technical support refer to page 138 Intermittent Loose connections or Check your wiring and tighten any loose connections operation vibrations exist or cushion vibration sources The board is overheating Check environmental and ambient temperature consult the board s specifications on page 149 of this manual and the documentation provided by your computer manufacturer for more information Electrical noise exists Check your wiring and either provide better shielding or rerou
124. red scan mode usage as enabled The retrigger source as Software Thenumber of times to scan per trigger or retrigger also called the multiscan count The frequency of the Triggered Scan Counter The initial trigger source depends on the trigger acquisition mode selected refer to page 79 for more information on the supported trigger acquisition modes and trigger sources Note An A D Trigger Out signal is provided for your use This signal is high when the A D subsystem is waiting for a trigger and low when a trigger occurs In software retriggered scan mode this signal stays low until the desired number of samples have been acquired then goes high until the software retrigger is generated Externally Retriggered Scan Mode Use externally retriggered scan mode if you want to accurately control the period between conversions of individual channels and retrigger the scan based on an external event Like software retriggered scan mode this mode allows you to acquire 262 144 samples per trigger 256 times per trigger x 1024 location channel list Note Use externally retriggered scan mode with continuous post trigger acquisitions only refer to page 81 for more information on post trigger acquisitions When it detects an initial trigger post trigger source only the board scans the channel list up to 256 times then waits for an external retrigger to occur Specify any supported post trigger source as the initial trigger F
125. reset to 0 when the output FIFO is reset To avoid the output FIFO underrun error in continuously paced mode the host computer can read the output FIFO counter to determine how many samples remain in the output FIFO and transfer more data before the output FIFO empties The conversion rate is determined by the frequency of the D A output clock The maximum throughput rate in this mode is 500 kHz 500 kSamples s in 100 mV steps or 200 kHz 200 kSamples s in full scale steps Note that rate is system dependent Refer to page 88 for more information on the D A output clock To select continuously paced analog output mode use software to specify the following parameters e Set the dataflow as Continuous Set WrapSingleBuffer to False to use multiple buffers A minimum of two buffers is recommended Set the trigger source as any of the supported trigger sources Refer to page 89 for more information on the supported trigger sources Waveform Generation Use waveform generation mode if you want to output waveforms repetitively Before this process can begin the host computer must transfer the entire waveform pattern to output to the DACs from a single buffer allocated in computer memory into the output FIFO on the board Use software to allocate a single buffer and to specify the waveform pattern If you are using a single DAC the waveform pattern can range from 2 to 4 096 samples if you are using two DACS the waveform pattern can
126. rigger source for the A D and D A subsystems as the external analog threshold trigger Then wire an external analog threshold trigger to the screw terminal panel Using software allocate a simultaneous start list put the A D and D A subsystems on the simultaneous start list prestart the subsystems then start the subsystems When started both subsystems are triggered simultaneously when the external analog event occurs One of the analog input channels Using software specify the trigger source for the A D and D A subsystems as one of the analog input channels Then wire an external analog threshold trigger to one of the 32 or 16 analog input channels depending on the channel type specified Using software allocate a simultaneous start list put the A D and D A subsystems on the simultaneous start list prestart the subsystems then start the subsystems When started both subsystems are triggered simultaneously when the external analog event occurs on the specified analog input channel Principles of Operation Synchronizing the Clocks You can synchronize the clocks of the A D and D A subsystems as follows Internal Sample Clocks Using software specify the clock source as the internal A D sample clock for the A D subsystem and the internal D A output clock for the D A subsystem Specify the same frequency for both internal clock sources Then specify the trigger source for the A D and D A subsystems as the software trigger W
127. rising edge digital trigger OL TRG EXTERN for DataAcq SDK users or an external negative digital TTL trigger for a falling edge digital trigger OL TRG EXTRA for DataAcq SDK users Analog Threshold Trigger For analog input operations an analog trigger event occurs when the DT3034 detects a transition from above a threshold level to below a threshold level falling edge or a transition from below a threshold level to above a threshold level rising edge The following analog threshold trigger sources are available External Analog Trigger input signal This trigger source is supported by the DataAcq SDK it is not supported by the DT Open Layers Class Library Connect an external analog trigger signal to screw terminal 107 on the DT740 screw terminal panel Using software specify the trigger source as either a rising edge OL TRG EXTRA 1 for DataAcq SDK users or falling edge analog threshold trigger OL_TRG_EXTRA 2 for DataAcq SDK users Oneofthe analog input channels after gain is applied also called the output of the programmable gain amplifier PGA Using software specify the trigger source as either a positive threshold trigger or negative threshold trigger Using software specify the analog input channel used as the analog threshold trigger as the first channel in the channel list refer to page 72 for more information On DT3034 boards the threshold level is set using a dedicated 8 bit DAC the second D A subs
128. roviding that they are not performing single value operations Refer to page 76 and page 90 for more information on single value operations You can synchronize the A D and D A subsystems in two ways by synchronizing the triggers and by synchronizing the clocks This section describes these two methods Synchronizing the Triggers You can synchronize the triggers of the A D and D A subsystems as follows Software trigger Using software specify the trigger source for the A D and D A subsystems as the software trigger Then using software allocate a simultaneous start list put the A D and D A subsystems on the simultaneous start list prestart the subsystems and start the subsystems When started both subsystems are triggered simultaneously External digital TTL trigger Using software specify the trigger source for the A D and D A subsystems as the external digital TTL trigger Then wire an external digital TTL trigger to both the A D subsystem and the D A subsystem Using software allocate a simultaneous start list put the A D and D A subsystems on the simultaneous start list prestart the subsystems then start the subsystems When started both subsystems are triggered simultaneously when the external digital event occurs External Analog threshold trigger This option is supported only when using the DataAcq SDK it is not supported using the DT Open Layers for NET Class Library Using software specify the t
129. s Preparing to Wire toa Screw Terminal Patiel 0 eicere re RR ea 41 are Terminal ASSISTED oes oo coe ee ges ned dR RM rye erede red eee doeet 42 Connecting Analog Input Siptiale 2er ec ee bates aes eee ee eet 45 Connecting Analog Ouipur Slenals e res Ad R deett 50 Connecting Digital LO Sigmals lt e TE cae ee eR Ree ER Re RE RE HO det ne td 51 Connecting Counter TimerSignalg eese a e a ee EAS rd 52 39 Chapter 4 40 C Install the Board and Load the Device Driver see Chapter 2 starting on page 23 Attach and Configure the Screw Terminal Panel see Chapter 3 starting on page 33 Wire Signals this chapter 7 N Verify the Operation of the Board see Chapter 5 starting on page 57 UN E Wiring Signals Preparing to Wire to a Screw Terminal Panel This section describes wiring recommendations when connecting signals to a DT3034 board and screw terminal panel Wiring Recommendations Follow standard ESD procedures when wiring signals to the board Use individually shielded twisted pair wire size 14 to 26 AWG when using a DT3034 board in highly noisy electrical environments Separate power and signal lines by using physically different wiring paths or conduits To avoid noise do not locate the screw terminal panel and cabling next to sources that produce high electro magnetic fields such as large electric motors power lines solenoids and electric arc
130. s such as 1 2 or 2 3 or 3 4 can be cascaded in software If not using cascaded timers this value is approximately 305 18 Hz 119 Chapter 7 Counter Timers 120 Table 21 DT3034 Counter Timer Options DT3034 Cascading Support SupportsCascading A D D A DIN DOUT C T Yes QUAD Event Count Mode Support SupportsCount Yes Generate Rate Mode Support SupportsRateGenerate Yes One Shot Mode Support SupportsOneShot Yes Repetitive One Shot Mode Support SupportsOneShotRepeat Yes Up Down Counting Mode Support SupportsUpDown Edge to Edge Measurement Mode Support SupportsMeasure Continuous Edge to Edge Measurement Mode Support SupportsContinuousMeasure High to Low Output Pulse Support SupportsHighToLowPulse Yes Low to High Output Pulse Support SupportsLowToHighPulse Yes Variable Pulse Width Support SupportsVariablePulseWidth Yes None internal Gate Type Support SupportsGateNone Yes High Level Gate Type Support SupportsGateHighLevel Yes Low Level Gate Type Support SupportsGateLowLevel Yes High Edge Gate Type Support SupportsGateHighEdge Yes Low Edge Gate Type Support SupportsGateLowEdge Yes Level Change Gate Type Support SupportsGateLevel Clock Falling Edge Type SupportsClockFalling Clock Rising Edge Type SupportsClockRising Gate Falling Edge Type SupportsGateFallin
131. s unless the signals are enclosed in a mumetal shield On the DT740 screw terminal panel we recommend that you connect the shields as follows Connect the analog shield to screw terminals TB35 and TB36 and to TB51 through TB56 Connect the digital shield to screw terminals TB105 and TB108 Connect the analog and digital shields to one end only When first installing the board we recommend that you do the following Wire a function generator or a known voltage source to analog input channel 0 use the differential configuration Wire an oscilloscope or voltage meter to analog output channel 0 Wire a digital input to digital I O Port A Wire a external clock or scope to counter timer channel 0 If you have not done so already install the DT3034 software Run the Quick DataAcq application described in Chapter 5 starting on page 57 to verify that the board is operating properly Once you have determined that the board is operating properly wire the signals according to your application s requirements 41 Chapter 4 Screw Terminal Assignments 42 Screw terminals TB1 to TB56 on the DT740 screw terminal panel correspond to the analog I O channels from the DT3034 board Screw terminals TB57 to TB112 on the DT740 screw terminal panel correspond to the digital I O signals from the DT3034 board Screw terminals TB37 15 V and TB39 15 V on the DT740 screw terminal panel are available for low current signal conditio
132. s 108 69 Chapter 6 This chapter describes the analog input analog output digital I O counter timer and synchronous features of the DT3034 board To frame the discussions refer to the block diagram shown in Figure 20 Note that bold entries indicate signals you can access Trigger Clock A D Trig gt Buffer gt A D Trig Out Logic LR A D Trig A D Cik H A D Clk Out Ext A D Clock p A D Counter Ext A D TTL 24 bits Le A D Cik Ext D A Clock D A Counter 1 K Entry Ext D A TTL 24 bit gt D A Clk w CGL FIFO Analog Trigger TScan Counter rea pa 20 MHz Clock Be S Parameter R Ch Sel Reg Gain Sel Ext Analog Trigger H Input Sel 4K Output Output FIFO Analog In gt FIFO P Counter nalog 32 Channel Mux Ch Sel 16 bit Analog Out 1 DC Y gt Analog Out 0 bi nalog Out Gain Se Gain Amp gt sre L 9 1 2 4 8 D A Clk Lo 8 bit m DIO Bank B A D Cik 16 bit ADC MUX DAC Mt Bidirectional 7 0 ay 8 bit Latch DIO Ports y Y Sora DIO Bank A Tristat idirectional x 7 9 Input Sel istate Y Y a 8 bit Latch 7 0 Y Compare ETT ita 4 User Le Clk 3 0 2 Input FIFO oR Counter User Gate 3 0 User Out 3 0 a Analog Trigger MHz Ti
133. s are ignored In an abrupt stop the board stops outputting samples immediately all subsequent triggers are ignored Continuously Paced Analog Output Use continuously paced analog output mode if you want to accurately control the period between conversions of individual analog output channels in the analog output channel list The host computer transfers digital values to write to the DACs from allocated circular buffers in computer memory to the output FIFO on the board The DT3034 board has a 4 kSample output FIFO Use software to allocate the number of buffers and to specify the values It is recommended that you allocate a minimum of two buffers Principles of Operation When it detects a trigger the board outputs the values in the output FIFO to the DACs at the same time Even samples 0 2 4 and so on are written to entry 0 in the channel list odd samples 1 3 5 and so on are written to entry 1 in the channel list The operation repeats continuously until no more buffers are on the subsystem queue or you stop the operation Refer to page 92 for more information on buffers Ensure that the host computer transfers data to the output FIFO fast enough so that the output FIFO does not empty completely otherwise an output FIFO underrun error results Note that the output FIFO counter increments each time the host loads a value into the output FIFO and decrements each time the DAC reads a value from the output FIFO the counter is
134. s eh 139 Contents Appendix A Specifications ooooocoococcnrrnna eA 141 Analog Input Specifications sessa nen 142 Analog Output Specifications 0 0 0 0 een 145 Digital I O Specifications isses n 147 Counter Timer Specifications ssssssssssssss nen 148 Power Physical and Environmental Specifications lessen 149 Connector Specifications sn aaa a E ee enn es 150 Regulatory Sp cifications s s ies essai asm i mh ER E Rp H 151 Appendix B Connector Pin Assignments elleseseeeeesee 153 Connector J1 on the DT3034 Board 0 ccc cette een eee 154 Connector J2 on the DT3034 Board 156 Screw Terminal Assignments for the DT740 lisse 158 Appendix C Using Your Own Screw Terminal Panel 161 Analog Inputssie misses tee eee tavi b dieere ate deas e pesa 163 Single Ended Inputs o ce rect ths recep Ee DER Fade ae 163 Pseudo Differential Inputs seen 163 Differential Inputs oett tee merit rcs a tetur suc ad E moo M en Lx oci tg 164 Analog Outputs s ere tone ete ee e NR edd tete E dee ora ug 165 Digital Inputs and Counter TimerInputs seen 166 Digital Outputs a oes E totu dt de a cd ost tato trc ci ket 167 Cabling Information 2 eec pers ep ecce Ee AS 168 Jc c EET 169 Contents 10 About this Manual This manual describes how to set up and install the following components e DT3034 software e DT3034 board DT3034 D
135. select PGH Zero If the displayed value is not 0 0000 V within 0 001 V continue with Calibrating the PGH Zero Setting on page 129 otherwise click Quit when you are finished calibrating the analog input circuitry Once you have finished this procedure continue with Calibrating the Analog Output Subsystem on page 130 Note If you are not satisfied with the analog input calibration you can load the factory default settings stored in the EEPROM by clicking Restore in the Factory Settings box Using the Manual Calibration Procedure If you want to manually calibrate the analog input circuitry instead of auto calibrating it do the following 1 From the main menu of the DT3034 Calibration Utility click Configure and then Board 2 Select the name of the DT3034 board to configure from the combo box and then click OK 3 From the main menu of the DT3034 Calibration Utility click Calibrate 4 Click A D 5 In the Reference Source box select the reference that you are using Internal or External Internal is the default 6 Inthe Range box select Bipolar and then Zero 7 Click the increment or decrement arrows in the Manual Adjustment box until the display reads 0 0000 V within 0 001 V 8 In the Range box select Bipolar and then FS for full scale 9 Click the increment or decrement arrows in the Manual Adjustment box until the display reads 5 V with the internal reference or 49 3750 V with the external re
136. shold trigger to trigger both the A D and the D A subsystems ensure that you use the same analog trigger type for both subsystems either external or one of the analog input channels The polarity of the triggers however can be different Analog Output Conversion Modes DT3034 boards support the following conversion modes Single value operations are the simplest to use but offer the least flexibility and efficiency Use software to specify the range gain and analog output channel among other parameters and output the data from that channel For a single value operation you cannot specify a clock source trigger source or buffer Single value operations stop automatically when finished you cannot stop a single value operation Continuous analog output operations take full advantage of the capabilities of the DT3034 boards In this mode you can specify an analog input channel list clock source trigger source buffer and buffer wrap mode Two continuous analog output operations are supported continuously paced and waveform generation mode These modes are described in the following subsections To stop a continuously paced analog output operation you can stop sending data to the board letting the board stop when it runs out of data or you can perform either an orderly stop or an abrupt stop using software In an orderly stop the board finishes outputting the specified number of samples then stops all subsequent trigger
137. sion slots 27 setting up the computer 26 simultaneous start list 113 single buffer wrap mode 114 single ended channels 115 number of 115 single ended inputs 45 single value operations 113 analog input 76 analog output 90 digital I O 94 slot selection 27 software packages 18 software supported 18 software trigger 118 analog input 79 analog output 89 software triggered scan mode 77 specifications 141 analog input 142 analog output 145 connector 150 counter timer 148 digital I O 147 environmental 149 physical 149 power 149 regulatory 151 specifying a single channel analog input 71 analog output 87 digital I O 94 specifying one or more channels analog input 72 analog output 88 digital I O 72 stopping an operation analog input 76 analog output 90 subsystem descriptions A D 71 C T 96 D A 87 DIN and DOUT 94 SupportedGains 116 SupportedResolutions 116 SupportedVoltageRanges 116 SupportsBinaryEncoding 115 Index SupportsBuffering 114 SupportsCascading 120 SupportsChannelListInhibit 115 SupportsContinuous 113 SupportsContinuousPrePostTrigger 113 SupportsContinuousPreTrigger 113 SupportsCount 120 SupportsDifferential 115 SupportsDigitalEventTrigger 118 SupportsExternalClock 119 SupportsGateHighEdge 120 SupportsGateHighLevel 120 SupportsGateLowEdge 120 SupportsGateLowLevel 120 SupportsGateNone 120 SupportsHighToLowPulse 120 SupportsInProcessFlush 114 SupportsInternalClock 119 SupportsLowT
138. sources such as the outputs of a function generator to analog input channels 0 and 1 on the DT3034 board using the differential configuration Refer to page 46 for an example of how to connect a differential analog input In the Quick DataAcq application choose Scope from the Acquisition menu Select the appropriate DT3034 board from the Board list box In the Sec Div list box select the number of seconds per division 1 to 00001 for the display In the Channels list box select analog input channel 1 and then click Add to add the channel to the channel list Channel 0 is automatically added to the channel list Click Config from the Toolbar From the Config menu select ChannelType and then select Differential From the Config menu select Range and then select Bipolar or Unipolar depending on the configuration of your board The default is Bipolar From the Scope view double click the input range of the channel to change the input range of the board 10 V 5 V 2 5 V 1 25 V for bipolar ranges or 0 to 10 V 0 to 5 V 0 to 2 5 V or 0 to 1 25 V for unipolar ranges The default is 10 V Note that the display changes to reflect the selected range for all the analog input channels on the board In the Trigger box select Auto to acquire data continuously from the specified channels or Manual to acquire a burst of data from the specified channels Click Start from the Toolbar to start the continuous analog input operati
139. t on the falling edge of the external D A output clock signal Using software specify the clock source as external For DT3034 boards the clock frequency is always equal to the frequency of the external D A output clock input signal that you connect to the board through the screw terminal panel Trigger Sources A trigger is an event that occurs based on a specified set of conditions DT3034 boards support the following trigger sources for analog output operations Software trigger External digital TTL trigger Analog threshold trigger This subsection describes these trigger sources in more detail Software Trigger A software trigger event occurs when you start the analog output operation the computer issues a write to the board to begin conversions Specify the software trigger source in software External Digital TTL Trigger For analog output operations an external digital trigger event occurs when the DT3034 board detects either a rising or falling edge on the External D A TTL Trigger input signal connected to screw terminal 75 on the DT740 screw terminal panel The trigger signal is TTL compatible Using software specify the trigger source as either an external positive digital TTL trigger for a rising edge digital trigger OL TRG EXTERN for DataAcq SDK users or an external negative digital TTL trigger for a falling edge digital trigger OL TRG EXTRA for DataAcq SDK users Analog Threshold Trigger For
140. te unshielded wiring Data appears to be An open connection exists Check your wiring and fix any open connections invalid A transducer is not connected Check the transducer connections to the channel being read The board is set up for Check your wiring and ensure that what you specify differential inputs while the in software matches your hardware configuration transducers are wired as single ended inputs or vice versa 136 Troubleshooting Table 22 Troubleshooting Problems cont Symptom Possible Cause Possible Solution Computer does not boot Board is not seated properly Check that the slot in which your DT3034 board is located is a PCI slot that the board is correctly seated in the slot and that the board is secured in the Slot with a screw The power supply of the computer is too small to handle all the system resources Check the power requirements of your system resources and if needed get a larger power supply consult the board s specifications on page 149 of this manual System lockup Board is not seated properly Check that the slot in which your DT3034 board is located is a PCI slot that the board is correctly seated in the slot and that the board is secured in the slot with a screw 137 Chapter 9 138 Technical Support If you have difficulty using a DT3034 board Data Translation s Technical Support Department is
141. ter 2 32 9 Z Attaching and Configuring a Screw Terminal Panel Attaching the DT740 Screw Terminal Panel Configuring the DT740 Screw Terminal Panel Chapter 3 34 un Install the Board and Load the Device V Driver see Chapter 2 starting on page 23 Attach and Configure the Screw Terminal Panel this chapter Wire Signals see Chapter 4 starting on page 39 C Verify the Operation of the Board see Chapter 5 starting on page 57 Attaching and Configuring a Screw Terminal Panel Attaching the DT740 Screw Terminal Panel If you are using the DT3034 board you first need to attach the DT740 screw terminal panel to the board before you can wire signals Connector J1 on the screw terminal panel brings out all of the analog signals from connector J1 on the board cable EP307 connects connector J1 on the screw terminal panel to the DT3034 board Connector J2 on the screw terminal panel brings out all of the digital and counter timer signals from connector J2 on the board cable EP308 connects connector J2 on the screw terminal panel to the DT3034 board Figure 3 illustrates how to attach the DT740 screw terminal panel to the DT3034 board Analog I O Connector J1 DT3034 Board B EP307 Cable di DT740 Screw EP308 Cable ds Terminal Panel A Digital I O Connector J2 Figure 3 Attaching the D
142. ternal A D sample clock or when you want to pace at uneven intervals Connect an external A D sample clock to screw terminal 76 on the DT740 screw terminal panel Conversions start on the falling edge of the external A D sample clock input signal Using software specify the clock source as external The clock frequency is always equal to the frequency of the external A D sample clock input signal that you connect to the board through the screw terminal panel 75 Chapter 6 76 Analog Input Conversion Modes DT3034 boards support the following conversion modes Single value operations are the simplest to use but offer the least flexibility and efficiency Use software to specify the range gain and analog input channel among other parameters acquire the data from that channel and convert the result The data is returned immediately For a single value operation you cannot specify a clock source trigger source trigger acquisition mode scan mode or buffer Single value operations stop automatically when finished you cannot stop a single value operation Scan mode takes full advantage of the capabilities of the DT3034 board In a scan you can specify a channel list clock source trigger source trigger acquisition mode scan mode and buffer Two scan modes are supported continuously paced scan mode and triggered scan mode often called burst mode These modes are described in the following subsections Using soft
143. th higher capacitive loads The grounds of most boards are optimized for analog inputs at the expense of some logic or high frequency noise on the analog outputs This is because the analog and digital grounds of the board are connected at the ADC s input The analog outputs are brought out as a high and a low signal but the low side is the analog ground at the DAC s output buffer To remove the high frequency noise and smooth the glitch energy on the analog outputs you can install a 15 kHz RC filter on the output a 100 Q resistor in series with the output and a 0 1 uF capacitor between the output side of the 100 O resistor and output low 165 Appendix C Digital Inputs and Counter Timer Inputs TTL type inputs must have current limiting so that circuitry is not damaged when power is removed On all Data Translation PCI boards current limiting is used to prevent damage in this fault condition On high speed clock inputs a ground that is located in the connector next to the clock must be connected as a twisted pair with the high speed clock input 166 Using Your Own Screw Terminal Panel Digital Outputs If you are using the high drive capability of any of the PCI boards ensure that the load is returned to the digital ground provided in the connector next to the outputs If just eight of the digital outputs are switching 16 mA per output then 128 mA of current flows To minimize problems with ringing loading and EMI
144. um 1 5 V maximum 1 0 uA 1 0 uA 100 ns high 100 ns low 5 0 MHz 33 Q series resistor Counter Outputs Output driver Output driver low voltage Termination Output driver high voltage TTL 2 0 V minimum IOH 15 mA 2 4 V minimum IOH 3 mA 0 5 V maximum IOL 24 mA 0 4 V maximum IOL 12 mA 33 O series resistor Specifications Power Physical and Environmental Specifications Table 27 lists the power physical and environmental specifications for the DT3034 boards Table 27 Power Physical and Environmental Specifications Feature Specifications Power 5 V x0 25 V 1 5 A nominal 5V not used 12 V 0 12 A nominal 42V 0 1 A nominal 15 V Output J1 pins 6 and 7 10 mA nominal Physical Dimensions 8 5 inches length by 4 2 inches width Weight 5 95 ounces 170 grams Environmental Operating temperature range Storage temperature range Relative humidity 0 C to 70 C 25 C to 85 C To 95 noncondensing 149 Appendix A 150 Connector Specifications Table 28 lists the connector specifications for the DT3034 boards and corresponding cables Table 28 Connector Specifications for the DT3034 Board Feature Specifications 50 Pin Connector Plug for cable Cable shell kit Cable wire Receptacle for board Latching posts AMP Tyco 5787131 1 AMP Tyco 787133 1 AMP Tyco 57506 1 AMP Tyco 6658751 1
145. us About Trigger Mode Figure 27 illustrates the same example using software retriggered triggered scan mode The multiscan count is 2 indicating that the channel list will be scanned twice per trigger or retrigger In this example pre trigger analog input data is acquired on each clock pulse of the A D sample clock for two scans then the board waits for the software retrigger event When the software retrigger occurs the board begins acquiring pre trigger data until the post trigger event occurs Then the board finishes scanning the channel list the specified number of times but acquires the data as post trigger samples On all subsequent software retriggers post trigger data is acquired Chan 0 Chan 0 Chan 0 Chan 0 Chan 0 Chan 1 Chan 1 Chan 1 Chan 1 Chan 1 T Sample Clock Re trigger event Pre trigger event Re trigger event Post trigger event occurs occurs occurs pre trigger occurs post trigger post trigger pre trigger data is data is acquired until data is acquired until data is acquired acquired for 2 scans of post trigger occurs the end of the number Tor 2 scans of the channel list of scans the channel list Figure 27 Continuous About Trigger Mode with Triggered Scan Data Format and Transfer To represent unipolar signals DT3034 boards use straight binary data encoding such as 0000 to represent 0 V and FFFFh to represent full scale To represent bipolar signals
146. w 34 34 Analog Ground 35 8 Analog Shield Ground 36 33 Analog Shield Ground 37 7 15 V Output 38 32 Power Ground 39 6 15 V Output 40 31 Reserved 41 5 Analog Output 0 42 30 Analog Output 0 Return 43 4 Analog Output 1 44 29 Analog Output 1 Return 45 3 Reserved 46 28 Reserved 47 2 Reserved 48 27 Reserved 49 1 5 V Reference Out 50 26 Analog Ground 51 Analog Shield Ground 52 Analog Shield Ground 53 Analog Shield Ground 54 Analog Shield Ground 55 Analog Shield Ground 56 Analog Shield Ground 158 Connector Pin Assignments Table 33 lists the screw terminal assignments for connector J2 on the DT740 screw terminal panel Table 33 Screw Terminal Assignments for Connector J2 on the DT740 TB J2Pin Signal Description TB J2 Pin Signal Description 57 51 52 Digital Ground 58 17 User Clock Input 0 59 16 User Counter Output 0 60 50 External Gate 0 61 49 Digital Ground 62 15 User Clock Input 1 63 14 User Counter Output 1 64 48 External Gate 1 65 47 Digital Ground 66 13 User Clock Input 2 67 12 User Counter Output 2 68 46 External Gate 2 69 45 Digital Ground 70 11 User Clock Input 3 71 10 User Counter Output 3 72 44 External Gate 3 73 43 Digital Ground 74 9 External D A Sample Clock In 75 8 External D A TTL Trigger 76 7 External A D Sample Clock In 77 6 External A D TTL Trigger 78 5 A D Trigger Out 79 4 A D Sample
147. ware you can stop a scan mode operation by performing either an orderly stop or an abrupt stop In an orderly stop the board finishes acquiring the specified number of samples stops all subsequent acquisition and transfers the acquired data to host memory all subsequent triggers or retriggers are ignored In an abrupt stop the board stops acquiring samples immediately the acquired data is not transferred to host memory but all subsequent triggers or retriggers are ignored Continuously Paced Scan Mode Use continuously paced scan mode if you want to accurately control the period between conversions of individual channels in a scan When it detects an initial trigger the board cycles through the channel list acquiring and converting the value for each entry in the channel list this process is defined as the scan The board then wraps to the start of the channel list and repeats the process continuously until either the allocated buffers are filled or you stop the operation Refer to page 85 for more information on buffers The conversion rate is determined by the frequency of the A D sample clock refer to page 74 for more information on the A D sample clock The sample rate which is the rate at which a single entry in the channel list is sampled is determined by the frequency of the A D sample clock divided by the number of entries in the channel list To select continuously paced scan mode use software to specify the dataflow as Cont
148. xternal C T clock 97 external D A output clock 88 internal A D sample clock 75 internal C T clock 97 internal D A output clock 88 internal retrigger clock 77 internally cascaded C T clock 97 clocks base frequency 119 external 119 internal 119 maximum external clock divider 119 maximum throughput 119 minimum external clock divider 119 minimum throughput 119 common ground sense DT740 36 configuring the DT740 screw terminal panel 36 connecting signals analog outputs 50 counter timer signals 52 current loop analog inputs 49 differential analog inputs 46 digital I O signals 51 event counting signals 52 54 externally cascaded counter timers 56 pseudo differential analog inputs 46 pulse output signals 55 single ended analog inputs 45 connector J1 pin assignments 154 DT740 screw terminal panel 43 158 connector J2 pin assignments 156 DT740 screw terminal panel 44 159 connector specifications 150 continuous analog input about trigger 113 continuously paced scan mode 76 externally retriggered scan mode 78 post trigger 113 pre trigger 113 software retriggered scan mode 77 continuous analog output 113 continuously paced analog output 90 waveform generation mode 91 continuous counter timer 113 continuous digital input 113 continuous operations about trigger analog input 84 counter timer 103 post trigger analog input 81 pre trigger analog input 82 conversion modes 76 continuous analog output 90 continuousl
149. y paced scan mode 76 dynamic digital output 95 externally retriggered scan mode 78 single value analog input 76 single value analog output 90 software retriggered scan mode 77 conversion rate 76 77 78 counter timer 96 C T clock sources 96 cascading 120 cascading internally 97 channels 115 clock sources 119 duty cycle 99 event counting 120 gate types 98 Index high edge gate type 120 high level gate type 120 high to low output pulse 120 internal gate type 120 low edge gate type 120 low level gate type 120 low to high output pulse 120 one shot mode 120 operation modes 100 pulse output types 99 rate generation mode 120 repetitive one shot mode 120 specifications 148 units 96 variable pulse width 120 when using your own screw terminal panel 166 counting events 100 current loop inputs 49 current shunt resistors DT740 37 customer service 139 D D A output clocks external 88 internal 88 D A subsystem 87 specifications 145 DAQ Adaptor for MATLAB 18 data encoding 115 analog input 85 analog output 92 data flow modes continuous about trigger 113 continuous C T 113 continuous digital input 113 continuous post trigger 113 continuous pre trigger 113 single value 113 data format analog input 85 analog output 92 data transfer analog input 85 analog output 92 DataAcq SDK 18 description of the functional subsystems A D 71 C T 96 D A 87 DIN and DOUT 94 device driver 18 differential channels 115 di
150. ystem The hysteresis is fixed at 50 mV Using software program the threshold level by writing a voltage value to this DAC this value can range from 10 V to 10 V Note If you are using an analog threshold trigger to trigger both the A D and the D A subsystems ensure that you use the same analog trigger type for both subsystems either external or one of the analog input channels The polarity of the triggers however can be different Principles of Operation Trigger Acquisition Modes DT3034 boards can acquire data in post trigger mode pre trigger mode or about trigger mode These trigger acquisition modes are described in more detail in the following subsections Post Trigger Acquisition Use post trigger acquisition mode when you want to acquire data when a post trigger or retrigger if using triggered scan mode occurs Using software specify the following parameters e The dataflow as Continuous The trigger source to start the post trigger acquisition the post trigger source as any of the supported trigger sources Refer to page 76 for more information on the supported conversion modes refer to page 79 for information on the supported trigger sources Post trigger acquisition starts when the board detects the post trigger event and stops when the specified number of post trigger samples has been acquired or when you stop the operation If you are using triggered scan mode the board continues to acquire

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