Datathres?, Rdatadelup and rdatadeldn | Tektronix 071-0590-00

Remote Commands

data_thres?

Data Threshold Query. Returns the current threshold voltage for the Analyzer DATA input.

Min. Abbr.	data_thre?
Returns	<NR2>
Example	data_thres?	(command)
	DATA_THRES -1.50	(response)

rdata_del_up and rdata_del_dn

Reference Data Delay Up/Down (Default). This command pair is used to increment (rdata_del_up) or decrement (rdata_del_dn) the current REF DATA delay by the default increment of 0.1 nSec.

Min. Abbr.	rdata_del_u
	rdata_del_d
Arguments	none
Examples	rdata_del_up
	rdata_del_dn

rdata_del_up [v] and rdata_del_dn [v]

Reference Data Delay Up/Down. This command pair is used to increment

(rdata_del_up) or decrement (rdata_del_dn) the current REF DATA delay by v, where v is in <NR3> format and may be set in the range 0.1 nSec to 3.99 nSec in 0.1 nSec steps.

Min. Abbr.	rdata_del_u
	rdata_del_d
Argument	v:	<NR3>, 0.10E-9 to 3.90E-9 in 0.10E-9 steps.
Examples	rdata_del_up 1.00E-9
	rdata_del_dn 1.00E-9

C-62	GB1400 User Manual

Image 280

Tektronix 071-0590-00 user manual Datathres?, Rdatadelup and rdatadeldn, Rdatadelup v and rdatadeldn

Contents

This document supports firmware version 2.2 and above Page Warranty How to Reach Customer Service TEK-WIDE Table of Contents Tutorial Table of Contents Menus Gpib Theory of Operation Glossary Glossary-1 Index Index-1 List of Figures List of Tables Safety SMA Connectors Behavior of Outputs Turning Power On or OffDo Not Remove Instrument Covers Static Sensitive Device Notice How This Manual is Organized Conventions Related Manuals Xvi Getting Started GB1400 Pattern Generator and Error Detector Features Symmetrical, Low-Jitter Output Waveforms ApplicationsPrbs Or User-Defined Test Patterns Sample Applications Adjustable Inputs For Maximum Flexibility Auto Search For Easy SetupPowerful Analysis And Reporting Functions Burst Mode Ordering Information GigaBERT GB1400GB1400T GB1400R GB Comparison GB660/CSA907A GB700 GB1400 Feature Tx and Rx GB1400 Instrument Configurations Standard and Burst Option GB1400 with Burst Option Initial Self-Check Procedure ProcedurePage Operating Basics Functional Overview Bert Basics GB1400 Example, Bert Application Clock Data Controls, Indicators and Connectors Front Panel, GB1400 Generator Tx Front Panel, GB1400 Analyzer RX Display Formats 1405000 PN23Generator Tx Display Frequency kHz Pattern Output Frequency kHz Error Rate Totalize Delay/ Memory1405000 0E-06 2410538 PN23 Analyzer RX DisplayPage Outputs and Inputs Generator Output Connectors Section= clock bar = not clock Generator Clock Section Generator Output Section Generator Rear Panel Changing the Line Fuse Analyzer Input Section Analyzer Monitor Section Analyzer Rear Panel Connectors, Terminations, and Levels DATA/DATA BAR Controls and Indicators Power SwitchesReset to Factory Default View Angle and Panel Lock Keys Gpib Section Controls Pattern Controls and Function Keys Function Soft Keys F1, F2, F3, and F4 Analyzer Inputs Generator Error Inject Section Affected Input Allowable Control Analyzer Error History Section Sync Loss Analyzer Error Detection Section Analyzer Sync Controls Burst Mode Option Burst Mode Usage Specifications for Burst Mode Transmitter Burst Mode Option Data Value Pecl Option for GB1400 Tx Display SettingECL Levels Pecl Levels Basic Bert testing with the GB1400 Key Feature of TutorialObjective of Tutorial Equipment Required Setup units with default settings Instrument Connections and Controls Setup Generator for PRBS-23 Mode Connect the Generator to the Analyzer Setup Analyzer for AUTO-SEARCH Operation Change the Prbs pattern type Turn off Auto Search and change Generator Outputs Key several times to setup the analyzer for totalize Data signal not detected. Selected Your data signalError Rate display shows no Data or a 50% Error Rate You are starting to detect the data signal This Concludes the Tutorial Applications Two Auto Search Synchronization Methods Phase Application Note Auto Search Synchronization Auto Search Algorithm Fast Method Auto Search will find the Data DelayAuto Search will find the Data V-THRESHOLD voltage Auto Search will find the Data Pattern and Polarity II. Auto Search Algorithm BER MethodAuto Search will then attempt to find the Data Pattern Auto Search will determine the Data Delay Page Consideration In Determining The Eye Data Width Delay SpecificationsConsideration In Determining The Data Eye Center GB700/ GB1400 Optical Component Test Fiber Optic Link Test Example Fibre Channel Link Testing Parallel and High-speed Serial Testing Qpsk Modems, I & Q Qpsk Qpsk BER Testing using Prbs Data for 2-Channel I & Q Channel Bert Application Example Reference Turning Instrument Power ON/OFF Menu OverviewFunctions Common to Generator TX and Analyzer RX Selecting 115 VAC or 230 VAC Operation Recalling the Default Setup Selecting a PatternLocking the Front Panel Pattern Definitions Selecting the Active Pattern Selecting Prbs PatternsSelecting the Current Word Pattern Prbs 2n-1 Test Patterns Selecting RECALLing a Saved Word Pattern Word Creating Word Patterns Using Front Panel Controls Word PatternsBasics Standard Instruments Instruments Equipped with 1-Mbit Option Length Fill Creating Word Patterns Using MenusOrder Creating Word Patterns Under Remote Control Saving Word Patterns 1-Mbit Memory Option Recalling Word Patterns 1-Mbit Memory Option Generator TX Functions Clock Source and FrequencyExternal Clock Input Clock Source Saving a Frequency Recalling a Frequency Data and Clock Outputs Overview Generator Clock and Data Output Equivalent Circuits Output Setup Rules vs. Termination Impedance Amplitude and Baseline Offset Logically Inverting Output Data D-INV Procedure for Single-ended Operation TX only Procedure for Differential Operation TX onlySingle-ended or Differential Operation Pattern Sync and CLOCK/4 Outputs Error Injection Selecting an Error Inject Mode Procedure to Control Error Injection Mode Error Inject InputData Inhibit Logic Automatic Setup Functions Sync Disable KeyAnalyzer RX Functions Auto Search Key Actions Taken by Analyzer when Synchronization is Lost Auto Search With Prbs Patterns Relationship between Auto Search and Disable How to Disable Automatic Pattern ResynchronizationAuto Search with Non-PRBS Patterns Synchronization Lock Threshold Procedure to Set Sync ThresholdSynchronization Threshold Clock, Data, and Reference Data Inputs Input Parameters Input Data Delay How F2 and F3 Determine Which Input Can be Set UpProcedure to Add Delay Controls Input Termination Procedure for Selecting Input TerminationInput Terminations for CLOCK, DATA, and REF Data Logically Inverting Input Data Input Decision ThresholdInput Threshold Range as a Function of Termination Procedure for Selecting the Reference Data Mode Selecting the Reference Data ModeSingled-ended or Differential Operation Output Setup Monitor Outputs Error Detection Set Up BER How Totalize Results are Measured How Window Results Are Measured How Test Results Are Measured Window Measurement Process Test Measurement Process Display Mode Totalize, Window, or Test Totalize Process Set UpProcedure to Select a Results Display Mode How to Tell Which Display Mode is Active Window Process Set Up Procedure Test Process Set Up BER and Bit Errors Procedure to View Desired BER and Bit Error ResultsViewing Results All Other Results Test Process only Basic Report Setup Procedure Printing Results Reports Analyzer Setup Report Example Analyzer Setup Report End-of-Test Reports Procedure to Enable or Disable End-of-Test ReportsExample End-of-Test Report End-of-Window Reports Procedure to Enable or Disable End-of-Window ReportsExample End-of-Window Report On-Error Reports Example On-Error ReportProcedure to Enable On-Error Reports Procedure to Generate an On-Demand Test Summary Report BER = TE / TB Result DefinitionsAll Other Results Test Intervals Only ES = TSE US Error History Indicators Analyzer performance history indicators areLocated in the Error History section of the front Panel. These indicators will latch on when the indicated Analyzer Error Messages Procedure To Set Up the Audio Alert FunctionClear Control Audio Beeper Function Procedure for Stopping the Test Process Procedure for Starting the Test Measurement ProcessStarting and Stopping Measurements Starting New Totalize and Window Measurement Intervals Functions Performed Using the Menu System Example Procedure Illustrating Menus and FunctionsMenus Menu and Function Pages More Length Mode Report F1ESC F4SET Test Mode = Untimed F1ESC F4SET Reports on = EOT/ERROR General Rules for Using the Menu System Menu Summaries 10. Menu Descriptions 11. Analyzer Menu System Overview 12. Generator Menu System Overview Word Menu Function Definitions F1ESC F2- -F3 F4SET Word AT ddddd = bbbbbbbbWord Edit Edit Format Word Length Length F1ESC F2- -F3 F4SET LENmmmmm Bytes + n BitsWord Length Fill Word Memory WITHhh Word Fill Fill Word Order Order F1ESC F4SET Word Order = ccc FirstWord Order Word Synchronization Threshold Sync Word Sync Thres LEVEL= dWord Sync Buffer Buffer Auto Fast BER Test Length Length F1ESC F2- -F3 F4SET Test Length = hhmmssTest Length Test Mode Mode F1ESC F4SET Test Mode = cccccccTest Mode Test Reports Report F1ESC F4SET Reports on = cccccccccTest Report Test Threshold Thres F1ESC F4SET Error Threshold = eeeeeTest Thres Test Squelch Squel On Error Squelch = cccTest Squel Test Print Print Test Print Test View Previous VIEW-PRE F1ESC F4SET result namecount %Test VIEW-PRE Test View Current VIEW-CUR Test VIEW-CUR Window Mode Mode F1ESC F4SET Window Mode = cccccccWindow Mode Format F1ESC F4SET Window LEN = 1.0eEE BitsWindow Interval in Bits Bits Window Bits Window Interval in HrsMinSec Second F1ESC F2- -F3 F4SET Window LEN = hhmmssWindow Second Window Reports Report END of Window Print = cccWindow Report RS-232 Baud Rate Baud Baud = ddddBaud RS-232 Parity Parity F1ESC F4SET Parity = ccccParity RS-232 Data Bits Size Size = dSize RS-232 End-of-Line Char. EOL F1ESC F4SET EOL = cccccEOL RS-232 Xon/Xoff XON/XOFF F1ESC F4SET XON/XOFF Enable = cccXON/XOFF RS-232 Echo Echo F1ESC F4SET RS232 Echo Enable = cccEcho F1ESC F4SET Terminator = cccccc Utility Option Option Util Option Utility Version VER Util VER Time Option Date F1ESC F2- -F3 F4SET Date = mmm dd yyDate Time Option Time F1ESC F2- -F3 F4SET Time = hhmmssTime Reference Appendices GB1400 Generator TX Internal Clock SourceExternal Clock Source SMA Data Patterns Data Output True and Complement Rear Panel Auxiliary Outputs Phase A, Phase B, Clock/2 Error InjectionClock Output True and Complement NRZ-L RS-232 and Gpib Interfaces AC-Power RequirementsMechanical Clock Input GB1400 AnalyzerData Input Reference Data Input AUX Synchronization Measurements BER Printer Interface Specifications Bert Primer/ Technical Articles Bert used to test physical layer Bert DefinitionBert Building Blocks Bert Pattern Generation Prbs Patterns Prbs Prbs Generation Circuits a few sample diagrams Doutput Other Tx Patterns Bert Receiver or Error Analyzer Components Bert ClockOutput Amplifiers Data Coding, NRZ Error Comparator Received Data Pattern ReferenceData Input Amplifiers BER Computation Confidence Requires Collecting Many Errors Stress TestingConfidence Level in BER Measurement Additional Reading Eye Width Measurement Other Bert FeaturesAuto-Synch Pattern Lock Error InsertionPattern Loading Software Jitter Generation Bit error rate testing How long is long enough? BER Ideal pulse Stressing through pattern generation Bert Technical Articles Bert Technical Articles Bert Technical Articles Ensure Accuracy Of Bit-Error Rate Tests Page Supplying Data Patterns Bert Noise-Margin Stressing Μ F Avergage = Average = Page Data patterns for clock recovery stressing Data Patterns Stored + Peak Examining Jitter 2f BΦ θif B Amplitude UI peak-to-peak Frequency Jitter Tolerance Bert Affects Accuracy Example of Error Rate Measurement Abstract BER Measurement Inaccuracy versus Test Time = n / T Inaccuracy 95% = 2 σ / n ≈ 2/ n Testing for an Upper Limit on Error Rate Reduced Test Time by Stressing SNR = 20 log S / N rms Attenuation dB Example BER Example BER Summary Poisson Error Process Pn = rT n e−rT . n BER Biography Remote Commands Type of Commands Starts on Overview Datathres DATATHRES? Command Line Rules Command Line Terminator Setting Arguments Outside of Legal Ranges Command Examples Command Summary Alphabetical Bytesync n Analyzer only Bytesync? Remote Commands Rescurrate? Tse? Cls Ese n Esr? Ese?Idn? Opc Lrn?Opc? Rst Sre n Sre? Stb? Tst? WaiTse v Analyzer Only Tse? Analyzer Only Tsr? Analyzer Only Datainvert? Datainvert onoffDatapattern prbs word rdata Prbslength Datapattern?Prbslength? Saveword m Recallword mWordbits l, b1 b2 Wordlength l Wordbits?Wordmemlen m, l Wordmemord? Wordmemord m, msb lsbWordmemord? m Wordmemory m, l, b1, b2 Wordmemory? m Wordorder msb lsb Example Wordorder lsbPage Wordorder? Memory allocation for Word Memory storage Wordmemory? Gpibaddress? GpibaddressGpibbus offbus talklisten Gpibbus? Rsecho onoffRsecho? Rspmtlf onoff Rspmtlf? Rsprompt sRsxonxoff onoff Rspmtlf on Rsxonxoff? Allmem? Wordmemory 0, 16, #HAA, #HBB Wordmemory 1, 8, #HF0 Header? Header on offLogo? Options? ViewangleViewangle? Viewangle Clockfreq? ClockfreqClockmemory? Clockmemory m, f Clockmemory? mClocksource intext Clocksource? Clockstep Clockstep?Clockstpup and clockstpdn Clockstpup v and clockstpdn Recallfreq m Savefreq m Amplitude? AmplitudeClockampup and clockampdn Clockampup v and clockampdn ClockamplClockampl? Clockoffup and clockoffdn Clockoffup v and clockoffdn ClockoffsetClockoffset? Dataampup and dataampdn Dataampup v and dataampdn DataamplDataampl? Dataoffup and dataoffdn Dataoffset Dataoffup v and dataoffdnDataoffset? Offset Offset? Errorrate? Errorrate offextrate3rate4rate5rate6rate7Errorsingle Analyzer Commands Resbits? Rescurrate? Resdmper? Resdm?Resefs? Resefsper? Reserrors?Reselapsed? Resesper? Reses?Reslos? Resses? Resphaes?Ressesper? Resstop? Resstart?Ressync? Restesper? Restes?Restotrate? Resusper? Resus?Totalbits? Totalrate? Totalerror?Totaltime? Clockterm neg2v gnd ac Clockterm? Datadelup and datadeldn Datadelay? DatadelayDatadelup v and datadeldn Dataterm neg2v gnd ac Dataterm? Datathrup v and datathrdn Datathrup and datathrdnDatathres Rdatadelup and rdatadeldn Datathres?Rdatadelup v and rdatadeldn Rdatadelay Rdatadelay?Rdataterm neg2v gnd ac Rdataterm? Rdatathrup v and rdatathrdn Rdatathrup and rdatathrdnRdatathres Rdatathres? Autosearch auto off disab Autosearch? Automode ber, fast Automode? Autosample n Autosample? Autothresh? Autothresh nAutowidth? Dispselect total window test ErrorresetDispselect? Histrybits? Histryclear Histryphase? Histrypower?Histryphase on Histrystat? Histrysync? Sync? Testlength t TestdiscardTestlength? Testmode? Testmode untimedtimedrepeatTestprev currentprevious Testprev? Testreport eotonerrorbothnoneTestprint Testsquelch onoff Testreport?Testsquelch? Teststate runstop Teststate? Testthres Testthres? Winerror? WinbitlenWinbitlen? Winbits? Winmode bitssec Winmode?Winprev currentprevious Winprev? Winreport onoff Winrate?Winreport? Winseclen? Winseclen sWintime? Printenable? Printenable onoffPrintport parallel gpib serial Printstring s Printport?Printport Parallel Audioratup v and audioratdn Audioratup and audioratdnAudiorate Audiovol Audiorate?Audiovol? Audiovolup and audiovoldn Audiovolup v and audiovoldn Date yyyy-mm-dd Date? Time s Time? MB Option Commands Byteblock a, i, b1, ..., bn Byteblock? a Bytedelete a Byteedit a, b1 Byteedit? a Bytefill i, b1, b2, ..., bn Byteinsert a, i, b1, ..., bn Bytelength m, n Bytelength? Bytemode n Bytemode? Ratio errors/bits Bytesync n Analyzer onlyBytesync? Analyzer only Level Editbegin n Editcntrl? Editend n 102 Using the Gpib Interface Gpib Interface Device Settings Programming Gpib Remote Commands Gpib Connector Pin-OutsInterface Functions Gpib Status Reporting Gpib Numeric ResponsesStatus Byte Service Request SRQ Service Request EnableStandard Event Status Register Test Status Event Enable Register Analyzer only Standard Event Status Enable RegisterTest Status Event Register Analyzer only Gpib Common Commands Additional SRQ Gpib Commands Rx onlyPower-on settings IEEE-488.2 Programming Manual Requirements Specific Command Implementations Overlapped vs. Sequential CommandsFunctional Elements Self Test Query Using the RS-232 Interface Option RS-232 Interface Device Settings RS-232 Interface Testing RS-232 Interface Hardware/ Handshaking Considerations Programming RS-232C Remote Commands RS-232C Error Messages Using GPIB, RS-232 Customer Acceptance Test For GB1400 Generator & Analyzer Performance Verification Functional Test Setup for Functional Test of Standard Instrument Confirmation of Frequency Function Confirmation of Generator Output Data Level Change Confirmation of Error Injection Rates Confirmation of Selectable Analyzer Terminations Performance Verification Confirmation of Buttons and Indicators Panel Lock On OFF Addr Returning to Factory Default Settings How to Recall Factory Default SettingsUsing Front Panel Controls Via Remote Control Data Pattern Generator TX Factory Default SettingsCLOCK/ Data Outputs Remote Interfaces EOI/LFCR/LF Misc Error Beeper Analyzer RX Factory Default SettingsAuto Search/Pattern Synchronization Time and Date PrinterCurrent BER Test Parameters Misc Cleaning the CRT Cleaning the ExteriorCleaning the Interior Cleaning Instructions What is MLPE? Pattern Editor Requirements and FeaturesBefore You Begin List of Features Minimum Requirements If you are using an alternate shell, such as Norton Desktop List of Files on this Disk RS-232 Cabling Page Page Read Before Opening Sealed Wrapper Pattern Editing Software Pattern Editing Software Pattern Editing Software PLL Clock Source PCB Design OverviewData Generator PCB Data and Clock Output Amplifier PCB GB1400 Analyzer RX Input Amplifier PCB Common to both GB1400 TX and GB1400 RX Error Counter PCBFront Panel PCB GB1400 Tx Figure I-2. Block Diagram GB1400 RX Glossary/ Index Bit Error AddressAnalog-to-Digital Converter Attenuation Error Detection Bit RateByte Channel Residual error rate Multi-Channel CableNoise RS-232C Glossary-4 Auto Search Appendices Figures Index-3 Tables