National Instruments 5411 User Manual
DAQArbTM 5411
User Manual
High-Speed Arbitrary Waveform Generator
DAQArb 5411 User Manual
June 1997 Edition
Part Number 321558A-01
© Copyright 1997 National Instruments Corporation. All Rights Reserved.
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Important Information
Warranty
The DAQArb 5411 is warranted against def ects in mate rials and wor kmanship for a peri od of one year fr om the date
of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace
equipment that proves to be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instru ments software ar e warranted not to fail to execute pro grammi ng
instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as evidenced
by receipts or other documentation. National Instruments will, at its option, repair or replace soft ware media that do
not execute programming instructions if National Instruments receives notice of such defects during the warranty
period. National Instrument s does not war rant that the oper ation of the softwar e shall be un interr upted or error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside
of the package before any equipment will be accepted for warranty work. National Instruments will pay the shipping
costs of returning to the owner par ts whi ch are cov ered by w arranty .
National Instruments believes that the information in this manual is accurate. The document has been carefully
reviewed for technical accuracy. In the event that technical or typographical errors exist, National Instruments reserves
the right to make ch anges to subsequent editions of this document without prior not ice to holders of th is edition. The
reader should consult National Instruments if errors are suspected. In no event shall National Instruments be liable for
any damages arising out of or related to this docum ent or the in format ion contai ned in it.
E
XCEPT AS SPECIFIED HEREIN
SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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USTOMER’S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL
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NSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER
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shall not be liable for any delay in performan ce due to causes beyo nd it s reasonable cont rol. The warranty pr ovided
herein does not cover damages, defects, malf unctio ns, or s ervice fai lures caused by owne r’s fail ure to fol low the
National Instruments in sta llat ion, o perat ion, or ma inte na nce instr uct ions; owner ’s modif icat ion of the p roduct;
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other events outside reasonable control.
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ATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND
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Trademarks
LabVIEW®, NI-DAQ®, CVI™, DAQArb™, RTSI™, SCXI™, and Virtu alBench™ are tradem arks of Natio nal
Instruments C orporation.
Product and company names listed are trademarks or trade names of their respective companies.
WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS
National Instruments products are not design ed with comp onents and testing in tend ed to ensure a level o f reliabi lity
suitable for use in treatment and diag nosi s of humans . Appli cations of Nation al Instru men ts product s invol vin g
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medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all traditional
medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent serious injury
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monitor or safegua rd huma n he alth and sa fety in med ical or clin ical t reat ment .
About This Manual
Organization of This Manual........................................................................................ix
Conventions Used in This Manual................................................................................ x
Customer Communication.............................. ..... .........................................................x
Chapter 1
Introduction
About Your DAQArb 5411 ..........................................................................................1-1
What You Need to Get Started.....................................................................................1-2
Software Programming Choices...................................................................................1-3
National Instruments Application Software...................................................1-3
NI-DAQ Driver Software...............................................................................1-4
Optional Equipment......................................................................................................1-5
Cabling ..........................................................................................................................1-5
Unpacking.....................................................................................................................1-6
Table
of
Contents
Chapter 2
Installation and Configuration
Installation ....................................................................................................................2-1
Hardware Configuration...............................................................................................2-2
Installing the Optional Memory Module......................................................................2-2
Chapter 3
Signal Connections
I/O Connector ...............................................................................................................3-1
ARB Connector..............................................................................................3-2
SYNC Connector............................................................................................3-3
PLL Ref Connector.........................................................................................3-3
Dig Out Connector .... ...... ...............................................................................3-4
Connector Pin Assignments.............................................................3-4
Signal Descriptions............................................. ...... ...... .................3-5
SHC50-68 50-Pin Cable Connector..............................................................................3-6
Power-Up and Reset Conditions...................................................................................3-8
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National Instruments Corporation v DAQArb 5411 User Manual
Table of Contents
Chapter 4
Arb Operation
Waveform Generation..................................................................................................4-2
Update Rate.................................................................................................................. 4-3
Arb Mode......................................................................................................................4-3
Direct Digital Synthesis (DDS) Mode.......................................................................... 4-8
Triggering..................................................................................................................... 4-11
Marker Output Signal...................................................................................................4-16
Analog Output.............................................................................................................. 4-18
Phase-Locked Loops .................................................................................................... 4-22
Analog Filter Correction............................................................................................... 4-24
Digital Pattern Generation............................................................................................4-25
RTSI Trigger Lines....................................................................................................... 4-27
Calibration....................................................................................................................4-28
Waveform Size and Resolution...................................................................... 4-4
Waveform Memory ......................................................................... 4-4
Minimum Buffer Size and Resolution.............................................4-5
Waveform Linking and Looping....................................................................4-5
Waveform Staging........................................................................... 4-6
Frequency Resolution and Lookup Memory .................................................4-10
Frequency Hopping and Sweeping................................................................4-11
Trigger Sources.............................................................................................. 4-11
Modes of Operation .......................................................................................4-12
Single Trigger Mode..................................................... ...... ............. 4-12
Continuous Trigger Mode ............................................................... 4-13
Stepped Trigger Mode..................................................................... 4-14
Burst Trigger Mode.........................................................................4-15
SYNC Output and Duty Cycle.......................................................................4-19
Output Attenuation......................................................................................... 4-19
Output Impedance.......................................................................................... 4-20
Output Enable ................................................................................................4-21
Pre-attenuation Offset................................................ ....................................4-21
Master/Slave Operation.................................................................................. 4-23
DAQArb 5411 User Manual vi
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National Instruments Corporation
Appendix A
Specifications
Appendix B
Waveform Sampling and Interpolation
Appendix C
Customer Communication
Glossary
Index
Figures
Figure 1-1. The Relationship between the Programming Environment,
NI-DAQ, and Your Hardware ........................................ .......................1-4
Figure 3-1. DAQArb 5411 I/O Connector................................................................3-1
Figure 3-2. Output Levels and Load Termination
Using a 50 Ω Output Impedance...........................................................3-2
Figure 3-3. SYNC Output and Duty Cycle...............................................................3-3
Figure 3-4. DAQArb 5411 50-Pin Digital Output Connector
Pin Assignments ....................................................................................3-5
Figure 3-5. SHC50-68 68-Pin Connector Pin Assignments.....................................3-7
Table of Contents
Figure 4-1. DAQArb 5411 Block Diagram..............................................................4-1
Figure 4-2. Waveform Data Path Block Diagram....................................................4-3
Figure 4-3. Waveform Memory Architecture...........................................................4-4
Figure 4-4. Waveform Linking and Looping...........................................................4-6
Figure 4-5. Waveform Staging Block Diagram........................................................4-7
Figure 4-6. Waveform Generation Process ..............................................................4-8
Figure 4-7. DDS Building Blocks ............................................................................4-9
Figure 4-8. Waveform Generation Trigger Sources................................................. 4-12
Figure 4-9. Single Trigger Mode for Arb Mode....................................................... 4-13
Figure 4-10. Single Trigger Mode for DDS Mode.....................................................4-13
Figure 4-11. Continuous Trigger Mode for Arb Mode ..............................................4-14
Figure 4-12. Continuous Trigger Mode for DDS Mode.............................................4-14
Figure 4-13. Stepped Trigger Mode for Arb Mode....................................................4-15
Figure 4-14. Burst Trigger Mode for Arb Mode........................................................4-16
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National Instruments Corporation vii DAQArb 5411 User Manual
Table of Contents
Figure 4-15. Burst Trigger Mode for DDS Mode...................................................... 4-16
Figure 4-16. Markers as Trigger Outputs...................................................................4-17
Figure 4-17. Analog Output and SYNC Out Block Diagram.................................... 4-18
Figure 4-18. Waveform, Trigger, and Marker Timings............................................. 4-19
Figure 4-19. Output Attenuation Chain ..................................................................... 4-20
Figure 4-20. Phase-Locked Loop (PLL) Architecture...............................................4-22
Figure 4-21. Master/Slave Configurations for Phase Locking................................... 4-23
Figure 4-22. Analog Filter Correction ....................................................................... 4-25
Figure 4-23. Digital Pattern Generator Data Path...................................................... 4-26
Figure 4-24. Digital Pattern Generation Timing........................................................ 4-26
Figure 4-25. DAQArb 5411 RTSI Trigger Lines and Routing.................................. 4-27
Figure B-1. Analog Filter and Signal Images without Digital Filtering................... B-1
Figure B-2. Digital Filter, Analog Filter, and Signal Images
Figure B-3. Waveform Updates................................................................................B-2
Tables
Table 3-1. Digital Output Connector Signal Descriptions...................................... 3-6
Table 4-1. Generated Marker Positions.................................................................. 4-17
with Digital Filtering............................................................................. B-2
DAQArb 5411 User Manual viii
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National Instruments Corporation
The DAQArb 5411 User Man ual de scribe s the fe ature s, f unctions, an d
operation of the DAQArb 5411. The DAQArb 5411 is a high-speed
arbitrary wav ef or m generatin g de vi ce with performance compar ab l e t o
standalone instruments.
Organization of This Manual
The DAQArb 5411 User Manual is organized as follows:
• Chapter 1, Introduction, describes the DAQArb 5411, lists the
optional software and op tion al equipm en t, a nd e xplai ns how to
unpack your DAQArb 5411.
• Chapter 2, Installation and Configuration, describes how to install
and configure your DA QAr b 5411 .
• Chapter 3, Signal Connections, describes the I/O co nnectors, signal
connections, and digital interface to the DAQArb 5411.
• Chapter 4, Arb Operation, describes how to use your
DAQArb 5411.
• Appendix A, Specifications, lists the specifications of the
DAQArb 5411.
• Appendix B, Waveform S ampling and I nter polation, describes the
basics of waveform sampling and interpolation.
• Appendix C, Customer Communication, co ntain s f orm s y ou ca n
use to request help from National Instruments or to comment on our
products and manuals.
•The Glossary contains an alphabetical list and description of terms
used in this manual, including abbreviations, acronym s, metric
prefixes, mnemonics, and symbols.
•The Index cont ains a n al phabe tical list o f key te rms a nd topic s in
this manual, including the page whe re you can fin d ea ch on e.
About
This
Manual
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National Instruments Corporation ix DAQArb 5411 User Manual
About This Manual
Conventions Used in This Manual
The following conventions are used in this manual:
<> Angle brackets enclose the name of a key on the keyboard (for example,
<option>). Angle brackets containing numbers separated by an ellipsis
represent a range of values associated with a bit or signal name (for
example, DBIO <3.. 0>).
arb Arb is a generic term that denotes one or more of the PCI-5411 and
AT-5411 arbitrary wa ve form ge nera ting device s.
bold Bold text denotes the names of menus, menu items, parameters, dialog
box, dialog box buttons or o ptions, ico ns, window s, Windo ws 95 tabs,
or LEDs.
bold italic Bold italic text denotes a note, caution, or warning.
DAQArb 5411 DAQArb 5411 is a generic term that denotes one or more of the
PCI-5411 and AT-54 11 arbitra ry w avef orm gen erating devic es .
italic Italic text denotes emphasis, a cross reference, or an introduction to a
key concept. This font also deno tes text from which y ou supply the
appropriate word or v alue, as in Wind ow s 3 .x .
italic monospace
monospace Text in this font denotes text or characters that should literally enter
Italic text in this font denotes that you must enter the appropriate words
or values in the place of these items.
from the keyboard, sections of co de, pro gramming ex ample s, and
syntax examples. This font is also used for the pro per names of disk
drives, paths, directories, programs, subprogram s, subroutines, device
names, functions, operations, variables, file names and exten sions, and
for statements and c omm en ts take n from p rogra ms.
The Glossary lists abbreviations, acronym s, metric prefixes,
mnemonics, symbols, and ter ms.
Customer Communication
National Instruments wants to rece ive you r com ments o n ou r prod ucts
and manuals. We are interested in the applications you develop with our
products, and we want to help if you have problems with them. To make
it easy for you to contact us, this manual contains comment and
configuration forms for you to complete. These for ms are in
Appendix C, Customer Communication, at the end of this manual.
©
DAQArb 5411 User Manual x
National Instruments Corporation
Chapter
Introduction
This chapter describes the DAQA rb 5411, lists the op tional sof tware
and optional equipment, and explain s how to unpack you r
DAQArb 5411.
About Your DAQArb 5411
Thank you for buying a National Instrument s DAQArb 5411 device.
The DAQArb 5411 fa mily co nsists o f two dif fere nt d evice s f or you r
choice of bus: the PCI-5411 for the PCI bus and the AT- 5411 for the
ISA bus. Your 5411 devic e ha s th e follow ing f eature s:
• One 12-bit resolution analog output chan nel
• Up to 16 MHz sine a nd TT L wav ef orm o utpu t
• Software selectable output impedances of 50 Ω and 75 Ω
• Output attenuation levels from 0 to 73 dB
• Phase-locked loop (PLL) syn chron iza tion to e xterna l cl ocks
• Sampling rate of 610 S/s to 40 MS/s
• 2,000,000-sample onboa rd waveform memory
• Waveform linking and looping for arbitra ry wavefor m genera tion
• Digital and analog filters
• 32-bit direct digital synthesis ( DDS) for stan dard fun ction
generation
• External trigger input
• Marker output as trigger output
• 16-bit digital pattern generation with clock
• Real-Time System Integration (RTSI) triggers
1
All 5411 devices follow industry-standard Plug and Play specifications
on both buses and offer seamless integration with compliant systems. If
your application requires more than one channel of arbitrary waveform
generation, you can synchronize multiple devices on all platforms using
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National Instruments Corporation 1-1 DAQArb 5411 User Manual
Chapter 1 Introduction
RTSI bus triggers on devices that use the RTSI bus or the digital trigger
on the I/O connector.
Detailed specifications of the DAQArb 5411 devices are in
Appendix A, Specifications.
What You Need to Get Started
To set up and use your DAQArb 5411, you will need the following:
❑ One of the following DAQArb 5411 devices:
– PCI-5411
– AT-5411
DAQArb 5411 User Manual
❑
❑ NI-DAQ for PC compatibles, version 5.0 or later
❑ One of the following software packages and documentation:
–VirtualBench-Arb
– VirtualBench-Function Generator
–LabVIEW
– LabWindows
– Any standard C compiler
®
/CVI
❑ Cables and accessories
– SMB to BNC, 50 Ω cable
– SHC50-68 50-pin to 68-pin cable for pattern generator outputs
(optional)
– SCB-68 terminal block acce ssory in ge neric conf iguration
(optiona l)
❑ 16 MB memory module (optional)
❑ Your computer
DAQArb 5411 User Manual 1-2
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National Instruments Corporation
Software Programming Choices
There are several op tions to choo se from whe n programm ing your
National Instruments DAQ hardware . You can use LabVIEW,
LabWindows/CVI, or Vir tualBenc h.
National Instruments Application Software
LabVIEW and LabWindows/CVI are innovative program development
software packages for data acquisition and control applications.
LabVIEW uses graphic al pro gra m ming, w her ea s La bWind ows/CV I
enhances traditional pr ogr am ming la ngu ages. B oth p acka ges includ e
extensive libraries for data acquisition, instrument control, data
analysis, and graphic al data p res entation .
LabVIEW features interactive graphics, a state-of-the-art user
interface, and a po werf ul g raphic al progr am ming langua ge. The
LabVIEW Data Acquisition V I Libr ary, a se ries of vir tual instrum ents
(VIs) for using LabVIEW with National Instrum ents DAQ hardwa re, is
included with LabVIEW.
Note: DAQArb 5411 devices can use only the Advanced Analog Output VIs in
LabVIEW for analog output functions.
Chapter 1 Introduction
LabWindows/CVI features interactive graphics, a state-of-the-art user
interface, and uses th e ANSI standa rd C pr ogr am ming la nguage . The
LabWindows/CVI Data Ac quisition Lib rary, a se ries of fun ctions f or
using LabWindows/CVI with National Instruments DAQ hardware, is
included with the NI-DAQ software kit.
Using LabVIEW or La bWin d ows/ CVI so ftware will greatly reduce the
development time fo r you r data ac quisition an d con trol ap plicat ion.
VirtualBench is a suite of VIs that allows you to use your data
acquisition products just as you use standalone instruments, but you
benefit from the processing, display, and storage capabilities of PCs.
VirtualBench instrume nts load and sa ve w avef orm d ata to disk in the
same forms used in popular spreadsheet programs and word processors.
A report generation capability complements the raw data storage by
adding timestamps, measurements, user name, and comments.
The complete Vi rtual Ben ch suit e con tains Virt ualB ench- Arb,
VirtualBench-Func tion Gener ator, Virt ualBen ch-Sc ope,
VirtualBench-DSA, VirtualBench-DMM, and VirtualBench-Logger.
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National Instruments Corporation 1-3 DAQArb 5411 User Manual
Chapter 1 Introduction
Your DAQArb 5411 kit conta ins a free copy of Virtua lBenc h-Arb a nd
VirtualBench-Function Generator. VirtualBench-Arb is a turn-key
application you can u se to g ener ate wa vefor ms as yo u wo uld with a
standard arbitrary waveform generator.
NI-DAQ Driver Software
The NI-DAQ driver sof tware is included at no ch ar ge with all National
Instruments DAQ hardware. NI-DAQ is not packaged with accessory
products. NI-DAQ has an extensive library of functions that you can
call from your application pr ogr amming e nvir onmen t.
Whether you are u sing co nventiona l p rogra mm ing lang uage s,
LabVIEW, LabWindow s/CV I, or Vi rtualBe nch, you r applica tion uses
the NI-DAQ driver software, as illustrated in Figure 1-1.
Conventional
Programming Environment
DAQ or
SCXI Hardware
Figure 1-1.
The Relationship between the Programming Environment,
NI-DAQ, and Your Hardware
LabVIEW,
LabWindows/CVI, or
VirtualBench
NI-DAQ
Driver Software
Personal
Computer or
Workstation
DAQArb 5411 User Manual 1-4
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National Instruments Corporation
Optional Equipment
National Instruments offers a var iety of pr odu cts to use w ith yo ur
DAQArb 5411, incl ud ing pro bes , cable s, an d o ther ac cessor i es, a s
follows:
• Shielded and unshielde d I/O con nector b locks (SCB-6 8, TB X-68 ,
CB-68)
•RTSI bus cables
For more specific information about these products, refer to your
National Instruments catalogue or web site, or call the office
nearest you.
Cabling
The following list gives recommended part numbers for cables that you
can use with your 5 411 devic e:
• BNC male to BNC male, 50 Ω cable from ITT Pomona E lectro nics
(part number BNC-C-xx)
• BNC male to BNC male, 75 Ω cable from ITT Pomona E lectro nics
(part number 2249-E-xx)
• BNC female to RC A ph ono plug ada pter, fr om ITT Pom ona
Electronics (part number 5319)
•BNC 50 Ω fe ed -throug h te rminato r adapt er from IT T Pom ona
Electronics (part number 4119-50)
• BNC female -f ema le ad ap te r fr om ITT P om ona El ec tro ni cs
(part number 3283)
Chapter 1 Introduction
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National Instruments Corporation 1-5 DAQArb 5411 User Manual
Chapter 1 Introduction
Unpacking
Your device is shipped in an antistatic package to prevent electrostatic
damage to the device . Ele ctros tatic disc harg e can da mage seve ral
components on the device. To avoid such damage in handling the
device, take the following prec autions:
• Ground yourself via a ground ing strap or by holdin g a grounded
object.
• Touch the anti-static package to a metal part of your computer
chassis before rem oving the d evic e f rom the pack age .
• Remove the device from the package and inspect the device for
loose components or any other sign of d amag e. Notify Na tiona l
Instruments if the device appear s damaged in any way. Do not
install a damaged dev ice into yo ur comp uter .
• Never touch the exposed pins of connectors.
DAQArb 5411 User Manual 1-6
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National Instruments Corporation
Installation and
Chapter
Configuration
This chapter descr ibes how to in stall and conf igure your DAQArb 5411.
Installation
Note:
You should install your driver software before installing your hardware.
Refer to the
installation information.
If you have an older version of NI-DAQ already in your system, that
software will not work with your device. Install NI-DAQ from the NI-DAQ
software CD shipped with yo ur DAQArb 54 11.
You can install the PCI-5411 in any PCI slot and the AT-5411 in any ISA
slot in your comput er. Ho we ver, f or be st n oise perf or manc e, leav e as
much room as p ossi ble b etwee n th e DAQAr b 5 411 and oth er har dwar e.
Before installing your 5411 device, consu lt your PC user man ual or
technical reference manual for specific instructions and warnings.
Follow these general instructions to install your DAQArb 5411:
1. Write down the DAQArb 5411 serial number on the DAQArb 5411
2. Turn off your computer.
3. Remove the top cover or access port to the I/O channel.
4. Remove the expansion slot cover on the back pan el of the
5. For the PCI-5411, insert the card into a PCI slot. For the AT-5411,
6. Screw the mounting bracket of the DAQArb 5411 to the back panel
7. Visually verify the installation.
2
DAQArb 5411 R ea d Me Fir st
Hardware and Software C onfigur ation For m in Appe ndix C,
Customer Communication. You may need this seri al number fo r
future reference if you need to contact technical support.
computer.
insert the card into a 16-bit ISA slot. It may be a tight fit, but do not
force the device into place.
rail of the computer.
document for software
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National Instruments Corporation 2-1 DAQArb 5411 User Manual
Chapter 2 Installation and Configuration
8. Replace the cover.
9. Plug in and turn o n y our com puter.
The PCI-5411 or AT-5 411 is now in stalled .
Hardware Configuration
The DAQArb 5411 is a fully software-con figur able, Plug a nd Play
device. Configuration information is stored in nonvolatile memory. The
Plug and Play services que ry the d evi ce, rea d the in forma tion, a nd
allocate resources for items such as base address, interrupt level, and
DMA channel. After assigning these resources, the operating system
enables the de vice fo r ope ratio n.
Installing the Optional Memory Module
The standard onboard memory for the DAQArb 5411 is 4 MB. You can
upgrade to a 16 MB memory mod ule to store large wa veform buffer s
directly on the card. Perform the following steps to install the new
memory module:
1. Turn off the co mpu ter and remo ve the top c over or ac cess port to
the I/O channel.
2. Unscrew the bracket and remove the DAQArb 5411 from the slot it
has been plugged into.
3. Gently place your DAQArb 5411 on a flat surface with the
component and memory module side facing up.
4. Unfasten the two scre ws on the sid e of the m emor y modu le.
5. Gently unplug the memory modu le from the ma in board and store
the old memory module in an antistatic bag to avoid damage to the
components.
6. Properly align the new 16 MB memory module over the connectors
and plug it into the connectors.
7. Fasten the two sc rew s y ou re mo ved in ste p 4.
8. Follow the regular installation steps described in the Installation
section earlier in this chapter.
DAQArb 5411 User Manual 2-2
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National Instruments Corporation
Chapter
ARB
SYNC
PLL Ref
Dig Out
Signal Connections
This chapter describes the I/O connectors, signal connections, and
digital interface to the DAQArb 5411.
I/O Connector
The DAQArb 5411 ha s four con ne ctors: thr ee SM B conne c tors and a
50-pin mini-SCSI type connector , as shown in Figure 3-1 .
3
Figure 3-1.
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National Instruments Corporation 3-1 DAQArb 5411 User Manual
DAQArb 5411 I/O Connector
Chapter 3 Signal Connections
ARB Connector
The ARB connector p rov ides the w ave for m outp ut. The ma ximu m
output levels on this connector depend on the type of load termination.
If the output of a DAQArb 5411 terminates into a 50 Ω load, the output
levels are ±5 V, as shown in Figure 3-2. If the output of DAQArb 5411
terminates into a high impedance load (HiZ), the output levels are
±10 V. If the output terminates into any other load, the levels are:
R
V
= ± x 10 V
out
L
RL + R
O
where V
impedance in ohms, and R
DAQArb 5411. By default, R
is the maximum output voltage level, RL is the load
out
is the output impedanc e on the
O
= 50 Ω, but the software can also set it
O
to 75 Ω.
Note: Software will set the voltage output levels based on a 50 Ω load termination.
For more information o n w ave fo rm ge nera tion an d ana log ou tput
operation, refer to Cha pte r 4 , Arb Operation. For specifications on the
waveform output signal, see Appendix A, Specifications.
DAQArb 5411
=
R
50
R
HiZ
Load
=
L
Ω
Load
=
L
±5 V
±10 V
ARB
RO =
Ω
50
50 Ω Load
DAQArb 5411
ARB
R
O
Ω
50
Figure 3-2.
DAQArb 5411 User Manual 3-2
Output Levels and Load Termination Using a 50 Ω Output Impedance
High Impedance Load
©
National Instruments Corporation
SYNC Connector
Chapter 3 Signal Connections
The SYNC c onn ec tor i s a tr an sis to r-t r ans is to r- lo gic (T TL ) versi on o f
the sine waveform being generated at the output. You can think of the
SYNC output as a very high f reque ncy re solution,
software-programmable cloc k source for m an y app lica tions. You ca n
also vary the duty cycle of SYNC output on the fly by software control,
as shown in Figure 3-3. t
generated and t
w/tp)
x 100 %.
is (t
ARB Output
SYNC Output
(50% Duty Cycle)
SYNC Output
(33% Duty Cycle)
is the pulse width of the SYNC output. The duty cycle
w
is the time period of the sine wave being
p
t
p
t
w
PLL Ref Connector
Note: You can also lock the DAQArb 5411 to o ther National Instruments cards
over the RTSI bus using the 20 MHz RTSI clock signal.
Figure 3-3.
SYNC Output and Duty Cycle
You can route the SYNC output to the RTSI lines over the RTSI bus.
The SYNC output is derived from a comparator connected to the analog
waveform and is intend ed to be use d w hen th e wave form is a sine
function. The SYNC output will provide a meaningful waveform only
when you are ge nera ting a sine w ave on the ARB ou tput. For m ore
information on SYNC output, see Chapter 4, Arb Operation.
The PLL Ref connector is a phase-locked loop (PLL) input connector
that can accept a referen ce clock from an e xternal so urce and p hase lock
the DAQArb internal clock to this external clock. Th e refere nce clock
should not deviate more than ±100 ppm of its no minal frequenc y. The
minimum amplitude levels of 1 V
are required on this clock. You can
pp
lock reference clock frequen cies of 1 MHz and 5–2 0 MHz in 1 MHz
steps.
©
National Instruments Corporation 3-3 DAQArb 5411 User Manual
Chapter 3 Signal Connections
Dig Out Connector
If no external reference clock is available, the DAQArb 5411 will
automatically tune the internal clock to the best accuracy possible. For
more information on PLL operation, refer to Chapter 4, Arb Operation.
Dig Out is a 16-bit digital I/O connector that contains the 16-bit digital
pattern outputs, digital pattern clock outp ut, marke r ou tput, exter nal
trigger input, and power output.
Connector Pin Assignments
Figure 3-4 shows the DAQArb 5411 50-pin digital connector.
DAQArb 5411 User Manual 3-4
©
National Instruments Corporation
Chapter 3 Signal Connections
DGND
NC
DGND
NC
DGND
NC
DGND
+5V
DGND
MARKER
DGND
RFU
DGND
RFU
DGND
PA(13)
DGND
PA(13)
DGND
PA(7)
DGND
PA(4)
DGND
PA(1)
DGND
50
EXT_TRIG25
2449
2348
2247
2146
2045
1944
1843
1742
1641
1540
1439
1338
1237
1136
1035
NC
NC
NC
NC
NC
NC
+5V
+5V
+5V
PCLK
RFU
RFU
RFU
PA(15)
PA(14)
934
PA(12)
833
PA(11)
732
PA(9)
631
PA(8)
530
PA(6)
429
PA(5)
328
PA(3)
227
PA(2)
126
PA(0)
Figure 3-4. DAQArb 5411 50-Pin Digital Output Connector Pin Assignments
Signal Descriptions
Table 3-1 gives the pin name s and signa l descrip tions u sed o n the
DAQArb 5411 digital output connector.
©
National Instruments Corporation 3-5 DAQArb 5411 User Manual
Chapter 3 Signal Connections
Table 3-1.
Digital Output Connector Signal Descriptions
Signal Name Type Description
DGND – Digital ground
EXT_TRIG Input External trigger—The external trigger input signal is a
TTL-level signal that you c an use to sta rt or step thr ough a
waveform generation. For more information on trigger sources
and trigger mode, see Chapter 4, Arb Operation .
MARKER Output Marke r—A marker is a TTL-level output signal that you can set
up at any point in the waveform being gene rated. You can use
this signal to synchronize or trigge r o ther d ev ices a t a c erta in
time within waveform generation.
NC – Not connected.
PA<0..15> Output Digital pattern generator—The 16-bit dig it al re pr ese nta tio n of
the analog waveform is available as digital pattern outputs
along with the clock to which it is synchronized. This data is
available directly from the memory after some sample clocks
pipeline delay. The digital pattern outputs are available as TTL
output levels.
PCLK Output Digital pattern clock —The digital pattern clock output
synchronizes the digital pattern output. This data is available
directly from the memory after some sample clocks pipeline
delay. The clock output is available as a TTL output level.
RFU – Reserved for future use. Do not connect signals to this pin.
+5V Output +5 V p ow er —A +5 V ou tput signal is availa ble on the DAQArb
to power external devices. The maximum current you can draw
is 100 mA.
SHC50-68 50-Pin Cable Connector
You can use an optional SHC50-68 50-pin to 68-p in cable for pattern
generator output. The cable connects to the digital outpu t connector on
the DAQArb 5411. Figure 3-5 shows the 68-pin connector pin
assignments on the SHC50-68 ca ble.
©
DAQArb 5411 User Manual 3-6
National Instruments Corporation
Chapter 3 Signal Connections
Note: The SHC50-68 connector use s the sa me signals as the D AQArb 5411
digital output connector, shown in Table 3- 1.
PA(0)
PA(1)
PA(2)
PA(3)
PA(4)
PA(5)
PA(6)
PA(7)
PA(8)
PA(9)
PA(10)
PA(11)
PA(12)
PA(13)
PA(14)
PA(15)
MARKER
RFU
PCLK
RFU
RFU
RFU
RFU
+5V
NC
NC
NC
NC
NC
NC
NC
NC
NC
EXT_TRIG
23
26
27
28
29
30
31
32
33
34
10
11
12
13
14
15
16
17
18
19
20
21
22
24
25
1
35
2
36
3
37
4
38
5
39
6
40
7
41
8
42
9
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
+5V
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
Figure 3-5. SHC50-68 68-Pin Connector Pin Assignments
©
National Instruments Corporation 3-7 DAQArb 5411 User Manual
Chapter 3 Signal Connections
Power-Up and Reset Conditions
When you power-up your computer, the DAQArb 5411 is in the
following state:
• Output is disabled and set to 0 V
• Sample clock is set to 4 0 MH z
• Trigger mode is set to continuous
• Trigger source is set to automatic (the software provide s the
triggers)
• Digital f ilt e r is enabled
• Output attenuation remains unchanged from previous setting
• Analog filter remains unchanged from previous setting
• Output impedance remains unchanged from previous setting
• Digital pattern generatio n is disa bled
When you reset the board usin g NI -DA Q or any ap plication sof tware
calling NI-DAQ, your DAQArb is in the following state:
• Output is disabled and set to 0 V
• Sample clock is set to 4 0 MH z
• Trigger mode is set to continuous
• Trigger source is set to automatic (the software provide s the
triggers)
• Digital f ilt e r is enabled
• Output attenuation is set to 0 dB
• Analog filter is enabled
• Output impedance is set to 50 Ω
• Digital pattern generatio n is disa bled
• PLL reference frequ en cy i s se t t o 20 MH z
• PLL reference source is se t to in ternal tuning
• RTSI clock source is disabled
• SYNC duty cycle is set to 50%
DAQArb 5411 User Manual 3-8
©
National Instruments Corporation
Chapter
Arb Operation
This chapter describes how to use your DAQArb 5411.
Figure 4-1 shows the DAQArb 5411 block diagram.
RTSI Bus
Instruction
FIFOs
IFIFO
Control
Clock
Controls
Filter
Controls
Bus
Interface
RTSI
Control
Waveform
Sequencer
Trigger
Control
Data Path
DDS +
Lookup
Memory
AMM
Control
DDS
Control
Analog
Control
Memory Connector
Digital
Filter
DAC
Memory
Controller
Pattern
Generation
Circuit
Attenuators,
Filter, and
Amplifier
Level
Crossing
Detector
PLL and
Clocking
4
Digital Connector
ARB
SYNC
PLL Ref
ISA/PCI Channel
Figure 4-1.
DAQArb 5411 Block Diagram
The DAQArb 5411 consists of a bus interface that communicates with
the ISA bus for the AT-5411 or the PCI bus for the PCI -54 11. The bus
interface block handles Plug and Play protocols for assigning resources
to the device and providing drivers for the data and address bus that are
local to the device. The waveform sequencer performs multiple
©
National Instruments Corporation 4-1 DAQArb 5411 User Manual
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