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Agilent Technologies 22A, 54621D, 24A, 42A, 54621A, 41A manual Frame Start Addr7 Read Ack Data or

Models: 42A 22A 41A 24A 54621A 54621D

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Triggering the Oscilloscope

To use I2C triggering

EEPROM Data Read: the trigger looks for EEPROM control byte value 1010xxx on the SDA line, followed by a Read bit and an Ack bit. It then looks for the data value and qualifier set by the Data softkey and the Data is softkey. When this event occurs, the scope will trigger on the clock edge for the Ack bit after the data byte. This data byte does not need to occur directly after the control byte.

Read

SDA
SCL
Start or	Control byte R/W Ack	Data	Ack
Restart Condition			Trigger point

Frame (Start: Addr7: Read: Ack: Data) or

Frame (Start: Addr7: Write: Ack: Data): the oscilloscope triggers on a read or write frame in 7-bit addressing mode on the 17th clock edge if all bits in the pattern match. For triggering purposes, a restart is treated as a start condition.

	Read	Write
		Write
SDA
SCL
Start or	Address R/W Ack		Data	Ack	Stop
Start or				Trigger point	Stop
Restart				Trigger point	Condition
Restart				17th clock edge	Condition
Condition				17th clock edge
Condition

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Image 88

Agilent Technologies 22A, 54621D, 24A, 42A, 54621A, 41A manual Frame Start Addr7 Read Ack Data or

Contents

Agilent 54621D/22D/41D/42D Mixed-Signal Oscilloscopes Display shows current input signals Horizontal Controls select sweep speed and delay parametersSoftkeys extend the functionality of command keys UtilitiesThis Book Page Contents Contents Trigger TypesUsing Labels on the Mixed-Signal Oscilloscope Run/Stop/Single/Infinite Persistence OperationSaving and Recalling Traces and Setups Capturing DataMath Functions Cursor MeasurementsUtilities Contents-6 Getting Started Getting Started Getting Started Setting up the Oscilloscope To inspect package contents To inspect package contents Package contents for 54620/40-Series Oscilloscopes To inspect options and accessories To inspect options and accessoriesTo inspect options and accessories Accessories available Model DescriptionTo inspect options and accessories Power Cords Plug Type Cable Part NumberDisconnect power from the instrument To clean the oscilloscopeTo clean the oscilloscope To adjust the handle To adjust the handlePress the power switch To power-on the oscilloscopeTo power-on the oscilloscope To adjust the waveform intensity To adjust the waveform intensityTo connect the oscilloscope analog probes To connect the oscilloscope analog probesTo compensate your analog probe To compensate your analog probePress Autoscale To use the digital probes mixed-signal oscilloscope only To use the digital probes mixed-signal oscilloscope onlyConnect the clip to a node in the circuit you want to test Signal Lead Ground Lead Clip Signals Ground To connect an RS-232 cable To connect a printerTo connect a printer Press the Autoscale key on the front panel To verify basic oscilloscope operationTo verify basic oscilloscope operation Getting started using the oscilloscope interface To verify basic oscilloscope operation Using Quick Help Getting Started Loading an updated language file from floppy disk Loading an updated language file from floppy diskPage Front-Panel Overview Front-Panel Overview Using Single versus Run/Stop Using Auto trigger mode versus Normal trigger modeViewing signal detail with acquire mode Important Oscilloscope ConsiderationsImportant Oscilloscope Considerations Using Vectors Display menu Delayed Sweep Post Acquisition Processing54620/40-series Oscilloscope Front Panels 54620/40-series Oscilloscope Front Panels54624A 4-Channel Oscilloscope Front Panel Entry knob Autoscale key Softkeys Front-Panel Operation 54621D, 54622D D, and 54642D digital channelsInterpreting the display Interpreting the displayTo use analog channels to view a signal To use analog channels to view a signalExample To use digital channels to view a signal To use digital channels to view a signalTo display signals automatically using Autoscale To display signals automatically using AutoscaleHow Autoscale Works Undo AutoscaleTo apply the default factory configuration To apply the default factory configurationTo adjust analog channel vertical scaling and position Center the signal on the display using the position knobTo adjust analog channel vertical scaling and position Measurement HintsTo set analog channel probe attenuation factor To set the vertical expand reference for the analog signalExpand About Center To display and rearrange the digital channels To display and rearrange the digital channelsTo operate the time base controls Press the Main/Delayed, then press the Vernier softkeyTo operate the time base controls First set trigger Mode/Coupling Mode softkey to Normal To start and stop an acquisitionTo make a single acquisition To start and stop an acquisitionTo use delayed sweep Press the Delayed softkeyTo use delayed sweep Press Main/DelayedTo make cursor measurements To make cursor measurementsChoose what measurement you want on that source by pressing To make automatic measurementsTo make automatic measurements To print the display To modify the display gridTo modify the display grid Triggering the Oscilloscope Trigger Out connector Triggering the OscilloscopeTo select the Mode and Coupling menu Selecting Trigger Modes and ConditionsTo select a trigger mode Normal, Auto, Auto Level To select a trigger mode Normal, Auto, Auto LevelAuto Level and Auto modes Normal mode To select Noise Reject and HF Reject To select trigger CouplingTo select trigger Coupling To set holdoff To set holdoffTo set holdoff Holdoff Operating Hints External Trigger Input External Trigger Probe SettingsExternal Trigger Input Previous menu Trigger Types MegaZoom Technology Simplifies TriggeringSelect 1, 2, Ext, or Line as the trigger source To use Edge triggeringTo use Edge triggering To use Edge triggering To use Pulse Width triggering To use Pulse Width triggeringPress the qualifier softkey to select the time qualifier Qualifiers can be set as follows Qualifier time set softkeyTo use Pattern triggering To use Pattern triggeringSpecifying an Edge in a Pattern To use can triggering To use can triggeringPress the Baud softkey to set the can signal baud rate Press the Trigger softkey to select the trigger conditionTo use Duration triggering To use Duration triggeringTo use Duration triggering When the duration trigger occurs To use I2C triggering To use I2C triggeringAck Data Stop Start Address R/W Condition Frame Start Addr7 Read Ack Data or Condition 26th clock edge To use I2C triggering To use Sequence triggering To use Sequence triggeringSequence Selected Press the Find softkey and select the Find stage condition Press the Stage softkey and select FindEdge Pattern 1 and Edge Press the Stage softkey and select Trigger on Edge Pattern 2 and Edge Nth EdgePress the Stage softkey and select Reset on Edge 1 or Pattern 1 and Edge TimeoutTo use Sequence triggering To use SPI triggering To use SPI triggeringResetting all bits in the serial data string to one value Assign source channels to the clock, data, and frame signals To use SPI triggering To use SPI triggering To use TV triggering To use TV triggeringPress the Mode softkey to select the TV triggering mode To use TV triggering Provide Correct MatchingTV standard Field Alt Field To trigger on a specific line of video Alternate TriggeringLine Numbers per Field for Each TV Standard Line Number Represents CountTo trigger on all TV line sync pulses To trigger on a specific field of the video signal To trigger on all fields of the video signal To trigger on odd or even fields Holdoff Settings To use USB triggering To use USB triggeringTo use USB triggering Trigger Out connector MegaZoom Concepts and Oscilloscope Operation MegaZoom Concepts and Oscilloscope Operation MegaZoom Concepts Deep Memory Deep MemoryMemory depth values Oscilloscope Responsiveness Oscilloscope ResponsivenessMegaZoom Technology Display Update Rate Display Update RateTo setup the Analog channels To setup the Analog channelsTurning channels off To setup the Analog channels Press the BW Limit softkey to turn on bandwidth limiting Press the Imped impedance softkeyPress the Invert softkey to inverted the selected channel Press the Probe softkey to display the channel probe menu To setup the Horizontal time base Press the Main softkey to select Main horizontal modeTo setup the Horizontal time base Main modePress the Vernier softkey to turn on the time base vernier To setup the Horizontal time base Delayed mode To setup the Horizontal time base Roll mode XY modePress the Acquire key to display the Acquire menu Acquisition ModesAcquisition Modes All points displayed after Single or Stop Peak DetectAverage Mode Smoothing # Avgs=1 or High-resolution modeRealtime Mode Display modes Press the Display key to view the Display menuInfinite Persistence Clear displayVectors On/Off Pan and Zoom Pan and ZoomZoom To pan and zoom a waveform To pan and zoom a waveformRun/Stop/Single/Infinite Persistence Operation Acquiring Data Acquiring DataSingle versus Run/Stop Memory Depth/Record Length Memory Depth/Record LengthRun/Stop versus Single SingleTo run and stop an acquisition To take a single tracePress the Single key To run and stop an acquisitionConnect a signal to the oscilloscope Set up the trigger To capture a single eventTo capture a single event Operating HintsTo use infinite persistence To use infinite persistenceClearing stored infinite persistence waveforms Press the Display key, then press the Clear Display softkey To clear the waveform displayTo clear the waveform display Configuring the Mixed-Signal Oscilloscope To display digital channels using AutoscaleInterpreting the digital waveform display Activity indicatorInterpreting the digital waveform display List of stacked channels To turn individual channels on and off To turn individual channels on and offTo force all channels on or all channels off To change the display size of the digital channelsPress the Turn on or Turn off softkey DisplayedTo change the logic threshold for digital channels To change the logic threshold for digital channelsUsing Digital Channels to Probe Circuits Using Digital Channels to Probe CircuitsInput Impedance High-Frequency Probe Equivalent Circuit Probe Grounding Best Probing Practices Using Labels on the Mixed-Signal Oscilloscope To turn the label display on or off To turn the label display on or offPress the Label key To assign a predefined label to a channelTo assign a predefined label to a channel To define a new label Label Assignment Auto-Increment FeaturesTo define a new label To define a new label Label List Management To reset the label library to the factory default Press the Default Library softkeyTo reset the label library to the factory default Defaulting labels without erasing the default libraryPress the Save/Recall key to display the Save/Recall menu Saving and Recalling Traces and SetupsMaking a hardcopy print To Autosave traces and setups To Autosave traces and setupsMegaZoom Concepts and Oscilloscope Operation To save traces and setups to a new file on the floppy disk To save traces and setups to a new file on the floppy diskTo create a new file name, press the New File softkey To recall traces and setups To recall traces and setupsRecalling overwrites current settings Press the CSV, TIF, or BMP softkey Saving printing screen images to floppy diskSaving printing screen images to floppy disk Recalling the factory default setup Recalling the factory default setupMaking Measurements Making Measurements Concepts about the 54620/40-series OscilloscopesMain and Delayed Sweep Capturing DataMaking Measurements To use delayed sweep To reduce the random noise on a signal To reduce the random noise on a signalLF Reject Use averaging to reduce noise on the displayed waveform Press the Acquire key, then press the Averaging softkeySmoothing # Avgs=1 or High-resolution mode Making Measurements Characterize the glitch with delayed sweep Press the Main/Delayed key, then press the Roll softkey To use the Roll horizontal modeTo use the Roll horizontal mode To use the XY horizontal mode To use the XY horizontal modeSignal centered on the display Calculate the phase difference using the formula below Signals are 90 out of phase Signals are in phase Math Functions Math Operating HintsMath Scale and Offset Math Scale and OffsetMath Scale and Offset are Set Automatically Multiply MultiplySubtract SubtractDifferentiate DifferentiateFigure below shows an example of differentiate Integrate IntegrateIntegrate and Signal Offset FFT Measurement FFT MeasurementAliasing FFT Operation Scale and offset considerations FFT Measurement Hints FFT Measurement FFT Measurement Hints Cursor Measurements To make cursor measurements Select the X and Y softkeys to make a measurement Cursor Examples Cursors measure frequency of pulse ringing Measuring pulse width with cursors Phase Delay Automatic MeasurementsAverage Amplitude Base Maximum Minimum Peak-to-Peak RMS Top Preshoot OvershootMaking automatic measurements Making automatic measurementsMaking time measurements automatically Making time measurements automaticallyFFT measurements Digital channel time measurementsCounter Duty CycleFrequency PeriodMaking time measurements automatically Fall Time Rise Time+ Width WidthMaking time measurements automatically At Min Isolating an event for frequency measurementMaking Delay and Phase Measurements Making Delay and Phase MeasurementsDelay Digital channel measurementsPhase Measurement Making voltage measurements automatically Making voltage measurements automaticallyMath Measurements and Units Measurement definitions Using delayed sweep to isolate a pulse for Top measurement TopMaking overshoot and preshoot measurements Making overshoot and preshoot measurementsPreshoot Making overshoot and preshoot measurements Overshoot Page Utilities Utilities To configure Quick Help languages To configure Quick Help languagesLoading an updated language file from floppy disk Language Info softkeyTo update your instrument to the latest application software To configure a printer To configure a printerPress the Format softkey to select the print format CSV length Scale factorsGray scale printing Form feedTo use the floppy disk Deleted files cannot be recoveredTo use the floppy disk To set up the I/O port to use a controller To set up the I/O port to use a controllerPress the XON DTR softkey to set the RS-232 handshake Press the Baud softkey to set the RS-232 baud ratePin Number Signal RS-232 ConnectionsTo set the clock To set the clockTo set up the screen saver To set up the screen saverPress the Saver softkey to select the screen saver type To set up the screen saver To perform service functions To perform service functionsPress Start User Cal to start the routine User CalSelf test User Cal StatusAbout Oscilloscope Default Library softkey mixed-signal oscilloscopes only To set other optionsTo set other options Expand softkeyPerformance Characteristics Performance Characteristics Acquisition Analog Channels Agilent 54620-series Performance CharacteristicsAcquisition Digital Channels on 54621D and 54622D only Agilent 54620-series Performance Characteristics Vertical System Analog ChannelsVertical System Digital Channels 54621D and 54622D only Accuracy = ±2.0%80 mV + 0.4%80 mV = ±1.92 mVHorizontal Sample rate of 200/400 MSa/sTrigger System CanDigital D15 D0 Channel Triggering 54621D and 5462 2D Analog Channel TriggeringExternal EXT Triggering Measurement Features Display SystemFFT StoragePower Requirements General CharacteristicsInstallation categories Agilent 54620-series Performance Characteristics Agilent 54640-series Performance Characteristics Acquisition Digital Channels on 54641D and 54642D onlyAgilent 54640-series Performance Characteristics Vertical System Digital Channels 54641D and 54642D only Range Ns/div to 50 s/div Resolution Vernier Minimum pulse width setting 2 ns Digital D15 D0 Channel Triggering 54641D and 54642D Display System Window Rectangular, Flattop, Hanning Noise Floor General Characteristics Page Index NumericsIndex Missing acknowledge condition, I2C triggerIndex-3 Index-4 Declaration of Conformity Product Regulations EMCDeclaration of Conformity Product Regulations Safety Document Warranty Agilent Technologies, Inc