Agilent 16720A Help Volume

Help Volume

Instrument: Agilent Technologies 16720A 300 M Vectors/s Pattern Generator

Using the Agilent Technologies 16720A Pattern Generator

The Agilent 16720A Pattern Generator is used by digital design teams to emulate digital signals in circuits under development. The pattern generator can take the place of missing devices, or can act as a stimulus to functionally test prototypes.

Getting Started • “Overview of the Agilent Technologies 16720A Pattern Generator” on

page 10

• “A Beginner's Exercise” on page 17

Creating the Program • “Building an Initialization Sequence” on page 21

• “Building a Main Sequence” on page 23

• “Building a User Macro” on page 25

• “Importing Agilent 16522A ASCII Files” on page 28

• “Importing Agilent 16720A PattGen Binary Files” on page 39

• “Importing System Data Files” on page 58

• “Loading and Saving Pattern Generator Configurations” on page 61

See Also “Selecting the Correct Probe Pod” on page 62

“Connecting the Probe Pods” on page 71

“Editing Sequences” on page 73

“Working with Instruction Types” on page 78

“Working with Labels and Pods” on page 85

“Working with Macro Parameters” on page 98

“Working with Automatic Pattern Fills” on page 101

Using the Agilent Technologies 16720A Pattern Generator

“Printing the Pattern Generator Window” on page 108

“Printing Vector Sequences to a File” on page 109

“Viewing a Compiled Sequence” on page 116

Using the Intermodule Window (see the Agilent Technologies 16700A/BSeries Logic Analysis System help volume)

“Key Characteristics” on page 111

Main System Help (see the Agilent Technologies 16700A/B-Series Logic Analysis System help volume)

Glossary of Terms (see page 117)

Using the Agilent Technologies 16720A Pattern Generator

1 Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator 10

Mapping Probe Pods to the Interface 11 Vector Output Mode 12 Clock Source 13 Building a Sequence of Test Vectors 15 Running the Pattern Generator 16

A Beginner’s Exercise 17

Configure Format 17 Configure Sequence 18 Set up the Workspace 19 View the Results 19

Building an Initialization Sequence 21

Building a Main Sequence 23

Building a User Macro 25

Importing Agilent 16522A ASCII Files 28

Creating an ASCII File 30 ASCII Disk File Identifier 32 ASCII File Commands 32

Importing Agilent 16720A PattGen Binary Files 39

Creating a PattGen Binary File 40 Binary File Commands 42

Contents

Importing System Data Files 58

Data Sets 59 Data Set Labels 59 Data Set Range 60

Loading and Saving Pattern Generator Configurations 61

Selecting the Correct Probe Pod 62

Data Pod Descriptions 63 Clock Pod Descriptions 67

Connecting the Probe Pods 71

Editing Sequences 73

Cutting, Copying, Pasting, and Deleting Sequence Lines 73 Deleting Sequence Lines 74 Inserting Blank Sequence Lines 75 Go to a Line Number 76 Positioning the Sequence 76 Using Ditto " values 77

Working with Instruction Types 78

The Break Instruction 79 The Signal IMB Instruction 79 The Wait IMB Event Instruction 80 The Wait External Event Instruction 80 The User Macro Instruction 81 The Repeat Loop Instruction 82

Contents

Working with Labels and Pods 85

Creating and Inserting New Labels 86 Deleting Labels 87 Inserting Pre-assigned Labels 88 Renaming Existing Labels 88 Reordering a Label’s Pod Bits 89 Turning Labels On/Off 89 Clearing Format Labels 90 Searching for Labels 90 Swap Pods 90 Clear Pods 91 Assigning Bits to a Label 91 Label Polarity 92 Finding a label 92 Replace Labels 93 Appending Labels 94 Insert All Labels 95 Delete All Labels 95 Setting the Label Font Size 95 Adjusting Column Width 96 Setting Column Color 96 Setting the Numeric Base 97 Rearranging the Label Order 97

Working with Macro Parameters 98

Turning Parameters On 98 Inserting Parameters into a Macro 99 Assigning Parameter Values 99 Removing Parameters from a Macro 100

Working with Automatic Pattern Fills 101

Generating a Fixed Pattern Fill 101 Generating a Count Pattern Fill 102 Generating a Rotate Pattern Fill 103 Generating a Toggle Pattern Fill 105 Generating a Random Pattern Fill 106

Contents

Printing the Pattern Generator Window 108

Printing Vector Sequences to a File 109

Key Characteristics 111

Automatic Cursor Wrap 113

Recalling Macros 114

Copying Macros 115

Viewing a Compiled Sequence 116

Glossary

Index

Using the Agilent Technologies 16720A Pattern Generator

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

Description of the Agilent 16720A Pattern Generator

The Agilent 16720A Pattern Generator is a tool that generates digital signals. It is used in applications that require an external source to simulate digital circuitry or generate digital signals for functionally testing prototype hardware.

Combined with the analog and digital measurement capabilities of the logic analysis system, you have a tightly integrated solution to your digital stimulus and response measurement needs.

A Conceptual Measurement Example

The exact output pattern, clock type and speed, and number of required signals depends on your specific application. How you configure the pattern generator and what kind of signal generation sequence you create will vary. However, from a procedural standpoint, the steps are the same each time to set up, create a sequence, and run the pattern generator.

1. Select the probing (see page 62) that is compatible with your target circuit.

2. Set the Vector Output mode (see page 12) and the Clock Source (see page 13) parameters.

3. Connect the probes (see page 71) to your circuit and map the probe channels (see page 11) into the interface of the pattern generator.

4. Build a sequence of test vectors (see page 15) to generate the desired output signals.

5. Run (see page 16) the pattern generator and measure the active target circuit or prototype for the desired results.

Re-using Pattern Generator Programs

After you set up a pattern generator configuration, you may want to store it away so you can use it again. Perhaps you want to create a set

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

of test routines or circuit simulators. There are three ways to handle re-usable configurations.

• You can reload previously saved (see page 61) pattern generator configurations.

• You can import an Agilent 16522A ASCII file (see page 28) (can only be used for vector sets <= 1048576 vectors)

• You can import a Agilent 16720A PattGen Binary file (see page 39) (must be used for vector sets >1048576 vectors)

See Also “A Beginner's Exercise” on page 17

“Key Characteristics” on page 111

Mapping Probe Pods to the Interface

While the probes make the physical connection to your target circuit, a software connection is also made within the interface which routes generated signals to the proper probe output lines. This software connection is done within the Format tab and is called mapping.

The mapping process consists of logically grouping output signals that have a similar purpose to a label (see page 85) with a unique name. To add to or delete signals from a group, you simply turn On/Off the bits (see page 91) beside the label.

Example

This example shows eight channels (or bits) on probe pod 1 mapped to two labels in the interface. Bits 0-3 are assigned to label Bus_A, and bits 4-7 are assigned to label Bus_B. When a bit is assigned, an asterisk "*" appears in the bit assignment field, verifying the software connection.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

NOTE: After you set up your first measurement, use the ribbon cable ID clips to mark

the data cable numbers for future reference.

Vector Output Mode

The Vector Output Mode determines the channel width, available pods, and the frequency range for both the internal and external clock. The choice you make may be determined by trade-offs between clock speed and channel width.

Because the output mode affects clock frequency ranges, available pods, and channel width, keep your mode selection in mind when designing the circuit’s hardware interface and when mapping probe connections between the test circuit and the labels of the pattern generator.

This table shows the difference between the Full-Channel 180 MBits/s mode and the Half-Channel 300 MBits/s mode.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

Clock Source

The Clock Source field toggles between internal and external. The internal clock source is supplied by the pattern generator and controls the frequency used to output the vectors to the system under test. The external clock is provided by the user or the system under test, and is input to the pattern generator through the CLK IN probe of a clock pod.

An advantage of using an external clock is that you synchronize the vector output of the pattern generator to the system under test. No matter which clock source is used, vectors are always output on the rising edge of the clock.

Internal Clock Source

Use an internal clock source when you want to have control over the frequency of the output vectors and it is not important for the output vectors to be synchronized to the system under test.

You select clock frequencies in steps of 1. If you use the keypad to select a value between the step intervals, the value is rounded to the nearest interval.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

NOTE: If you use the keypad to change the the clock frequency value, you must press

the Enter key to register the new value. You are not required to type "Hz", you may use only a metric prefix or you may enter a floating point number, i.e. "50M" and "5e7" will both be displayed as "50MHz" after you select enter. You may also enter the value as a period, i.e. "20n" and "2e-8" will both be displayed as "50MHz".

The minimum clock period available with Vector Output Mode at Full Channel 180Mbit/s is 1MHz. Maximum clock frequency for Full Channel Mode is 180MHz. The minimum clock frequency available with Vector Output Mode at Half Channel 300Mbit/s is 1MHz. Maximum clock frequency for Half Channel Mode is 300MHz.

External Clock Source

Use an external clock source when you want to synchronize the frequency of the output vectors to the system under test. With this mode selected, you do not have direct control over the frequency of the output vectors. Output vector frequency will be the same as the external clock.

When using an external clock source the maximum clock period for the Vector Output Mode at Full Channel 180Mbit/s is 180 MHz. The maximum clock period for the Vector Output Mode at Half Channel 300Mbit/s is 300 MHz.

CAUTION: If the external clock is faster than the maximum period, the Agilent 16720A

will produce erroneous output vectors.

Clock Out Delay

The clock out delay setting lets you position the output clock with respect to the data. The zero setting is uncalibrated and should be measured to determine the initial position with respect to the data.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

Each numerical change of one on the counter results in an approximate change of 500 ps.

Building a Sequence of Test Vectors

Test vectors determine the pattern output at each clock cycle. Test vectors are positioned in a list called a sequence. When a sequence is run (see page 16), the list of vectors is executed in order of first vector to last vector. Vectors are always output on the rising edge of the clock.

In every pattern generator application, you have two sequences. An INIT SEQUENCE (initialization sequence) is used to place your circuit or subsystem in a known state. The initialization sequence is followed by the MAIN SEQUENCE. The main sequence is used for the actual pattern generation that stimulates your circuit under test. The INIT sequence is only run once, while the MAIN sequence loops if you select a repetitive run.

Using Hardware and Software Instructions

In addition to test vectors, both INIT and MAIN sequences can include predefined instruction (see page 78) elements. Instructions can create Breaks, Loops, and Wait, and can even signal the Intermodule Bus. The most useful instruction is "User Macro". With a User Macro instruction, you can create reusable sequences that accept parameters. This flexibility is very useful in prototype turn-on and environmental testing.

For more information on INIT and MAIN sequences and how to create them, see the following topics.

“Building an Initialization Sequence” on page 21

“Building a Main Sequence” on page 23

“Building a User Macro” on page 25

“Working with Instruction Types” on page 78

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Overview of the Agilent Technologies 16720A Pattern Generator

Running the Pattern Generator

If you are not changing the run options, simply select the Run icon to run a measurement. Select the Stop icon to stop a measurement.

See Also “What Happens when Run is Selected” on page 16

“What Happens when Stop is Selected” on page 16

What Happens when Run is Selected

In single run mode, the vectors are output from the first vector in the initialization sequence to the last vector of the main sequence. The last vector of the main sequence will be held at the outputs until you run again.

In repetitive run mode, the vectors in the initialization sequence will be output from first to last, one time, then the main sequence will repetitively output the vectors in that sequence until you select the Stop icon.

What Happens when Stop is Selected

When the pattern generator acknowledges stop, the vector currently being output will be held at the outputs until you run again.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

A Beginner’s Exercise

This exercise begins with the pattern generator Format tab active. If it is not active, select Format in the pattern generator window now.

In this exercise, you will create a label with eight output channels assigned to it. You will then create a "Walking Ones" output pattern using one of the automatic pattern fill functions.

NOTE: This exercise does NOT require you to connect the probes or view the output.

The intent of this exercise is to give you practice configuring the pattern generator interface. A timing analyzer display of the results is furnished for you.

1. Configure Format (see page 17) with a label called "Walk1" and all eight bits of Pod 6 assigned.

2. Select Sequence.

3. Configure Sequence (see page 18) with a Walking Ones sequence.

4. Set up the Workspace. (see page 19)

5. View the results. (see page 19)

Configure Format

1. In the pattern generator’s Format area, select the label Label1, then select Rename. In the Rename dialog, enter "Walk1", then select OK.

2. Select the bit assignment field under Pod 6 and select the menu item with all eight bits set to "*" (on).

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A Beginner’s Exercise

Configure Sequence

1. In the pattern generator’s Sequence window, select Hex and set the numeric base to Binary.

2. Select the first sequence line. This positions the cursor.

3. Select Rotate, and configure the Rotate Pattern Fill dialog as shown. Select Fill.

4. Select Close.

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A Beginner’s Exercise

Set up the Workspace

1. Open the system Workspace window.

2. Drag and drop a waveform icon onto the pattern generator icon.

3. Select the waveform icon, then select Display.

4. Select the Run icon.

View the Results

1. Select Walk 1 all in the waveform display, then select Expand.

2. Set the Samples/div to 1.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

A Beginner’s Exercise

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Building an Initialization Sequence

The initialization (INIT) sequence is the first of two vector sequences that appear in the Sequence display. Use the INIT sequence to put the circuit or subsystem into a known starting condition. You can also use the INIT sequence to arm a logic analyzer or oscilloscope with the Signal IMB instruction to begin a measurement when the MAIN sequence begins. If you leave the INIT sequence empty, it will be ignored.

What Happens when Run is Selected

Building the INIT Sequence

The INIT sequence can contain hardware and software instructions (see page 78) as well as vector data. However, instructions are not allowed on the first two vector lines.

1. Select the Sequence tab, then select INIT START.

2. Select Insert After, then select Vector.

3. Repeat for each new vector line you want to insert.

4. Select the left-most character in the new vector line.

5. Select Edit.

6. Enter in the desired vector data. As you enter the information, the default cursor wrap (see page 113) setting will roll the cursor left-to-right and top line to bottom line.

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Building an Initialization Sequence

7. Optional - If applicable, insert an instruction (see page 78) instead of entering vector data.

See Also “Working with Labels and Pods” on page 85

“Editing Sequences” on page 73

“Working with Instruction Types” on page 78

“Building a User Macro” on page 25

“Automatic Cursor Wrap” on page 113

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Building a Main Sequence

The MAIN sequence is the second of two vector sequences that appear in Sequence. Use the MAIN sequence as the primary signal generation sequence. The MAIN sequence must contain at least two vectors to output.

What Happens when Run is Selected

Building the Main Sequence

The MAIN sequence can contain hardware and software instructions (see page 78) as well as vector data. However, instructions are not allowed on the first two vector lines or the last vector line.

1. Select the Sequence tab, then select MAIN START.

2. Select Insert After, then select Vector.

3. Repeat for each new vector line you want to insert.

4. Select the left-most character in the new vector line.

5. Select Edit.

6. Enter in the desired vector data. As you enter the information, the default cursor wrap (see page 113) setting will roll the cursor left-to-right and top line to bottom line.

7. Optional - If applicable, insert an instruction (see page 78) instead of entering vector data.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Building a Main Sequence

See Also “Working with Labels and Pods” on page 85

“Editing Sequences” on page 73

“Working with Instruction Types” on page 78

“Building a User Macro” on page 25

“Automatic Cursor Wrap” on page 113

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Building a User Macro

A User Macro is a vector sequence defined by a custom name, then inserted by name into a sequence wherever the macro is needed. Macros may be inserted into the INIT or MAIN sequences of the vectors in Sequence, or into other macros. Using macros gives you the benefit of keeping INIT or MAIN sequences generic. By simply interchanging macros, you change the pattern generator output.

NOTE: Care should be taken to avoid infinite loops. For example, if macro 0 calls

macro 1, and macro 1 calls macro 0, this will cause an infinite loop.

Macros can also accept parameters (see page 98). A major benefit in using parameters is that you keep a macro’s functionality generic and still direct specific action identified by parameters. Think of a parameter as the only part of a macro that changes as the macro is reused. Each macro can accept a maximum of 10 unique parameters.

Typically, you create a macro first under the Macro tab, then insert it into sequences under the Sequence tab. You can create 100 different macros for use in one or more pattern generator sequences.

Differences between User Macros and the INIT and MAIN sequences are that macros cannot use any instruction that interacts with the intermodule bus (IMB). The reason is that these instructions can only be included once into the sequence. Since macros may be called as many times as desired, allowing these instructions within macros would violate this restriction. You remove macros from sequences by using the Delete Line(s) function.

Creating the Macro

A macro sequence can contain hardware and software instructions (see page 78) as well as vector data. However, instructions are not allowed on the first vector line.

1. In Macro, recall (see page 114) the macro that you want to create.

2. Select MACRO START.

3. Select Insert After, then select Vector.

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Building a User Macro

4. Repeat for each new vector line you want to insert.

5. Select left-most character in the new vector line.

6. Enter in the desired vector data. As you enter the information, the default cursor wrap (see page 113) setting will roll the cursor left-to-right and top line to bottom line.

7. Optional - Insert an instruction (see page 78) instead of entering vector data.

8. Enter in a name for the new macro.

9. Optional - Select Parameters and turn on any parameters you plan to use.

Inserting the Macro

1. In Sequence or Macro, select the vector line directly above where you want to insert the User Macro instruction.

2. Select Insert After, then select User Macro.

3. Select the User Macro instruction.

4. From the Macro Selection dialog that appears, select the desired macro name you want to insert.

5. Select OK.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Building a User Macro

NOTE: See The User Macro Instruction (see page 81) for restrictions on User Macro

instruction usage.

See Also “Recalling Macros” on page 114

“Copying Macros” on page 115

“Working with Macro Parameters” on page 98

“Working with Instruction Types” on page 78

“Editing Sequences” on page 73

“Working with Labels and Pods” on page 85

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing Agilent 16522A ASCII Files

You can create an ASCII text file and import it as a complete pattern generator program. In general, the ASCII file consists of a block of setup information, a block of label and channel information, and a block of pattern generator vector data. The file must be saved in ASCII format and organized as shown in step 1 of the procedure below.

1. Create the ASCII file (see page 30) in a text editor.

2. Save the file as Te x t On l y or ASCII Format in a directory on your analyzer’s hard drive.

3. In the Sequence menu bar, select File, then Import 16522A ASCII File. See the caution below.

4. From the file selection dialog that appears, select the desired path and ASCII file name.

5. Select Import.

CAUTION: Importing an Agilent 16522A ASCII file causes all current Format and

Sequence information to be overwritten. Be sure to save the pattern generator configuration before you begin the import process.

NOTE: Importing a 1048576 line 16522A ASCII file may take approximately two

minutes. If a 1048576 sequence is in memory when you begin an import, it may take up to a minute to clear the current data and up to two minutes to import the new data.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing Agilent 16522A ASCII Files

This figure shows Format after the ASCII file example shown in step 1 was imported.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing Agilent 16522A ASCII Files

Creating an ASCII File

You can create an ASCII file using any Windows, MS-DOS, or UNIX text editor. An ASCII file consists of a file identifier and three blocks of information. Each block must follow the specified order.

• ASCII 000000 - required file identifier ("ASCII" followed by 5 spaces and 6 zeros). ASCDown - optional. Retained for backwards compatibility.

• 1st block (optional)

FORMat - clock, channel mode, and delay information.

• 2nd block

LABel - names and number of channels.

• 3rd block

VECTor - vector data and Repeat indicators.

File Requirements and Precautions

• The file must contain only specified pattern generator commands (see page 32), and in the order and format shown in the example below.

• The file must be saved in "ASCII" or "text only" format.

• Vector data is assumed to be entirely hexadecimal base.

• No pattern generator instructions are allowed in the data.

• No pattern generator macros are defined or invoked in the data.

• All labels consist of adjacent bits.

• The file must end with a line termination character (line feed "<lf>" or a

carriage return and line feed "<CR><lf>".

• Comments can be included after the first line (ASCII 000000). Comments begin with a slash '/' and terminate at the end of the line.

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Importing Agilent 16522A ASCII Files

ASCII File Example

NOTE: In this example, the underlined links are added for documentation purposes

only, and would NOT be part of an actual disk file’s text. Line feeds "<lf>" are shown for example purposes only, and depending on the computer and text editor used, could actually be a carriage return followed by a line feed "<CR><lf>".

ASCII 000000 (see page 32)<lf> / / This is a test of the ascii file / ASCDown (see page 33)<lf> FORMat:MODE FULL (see page 36)<lf> FORMat:CLOCk INTernal, 10E-9 (see page 36)<lf> LABel LAB1,8 (see page 33)<lf> LABel DATA,8<lf> LABel TEST,9<lf> LABel CLK,3<lf> LABel BIG,12<lf> /* /* This is the beginning of the vector part /* VECTor (see page 34)<lf> 12 34 056 7 89A<lf> / Some vectors 0 22 007 0 FFF<lf> A0 33 000 1 111<lf> /* Some more vectors */ *M<lf> 92 6F 000 1 FF0<lf> CA CA 000 1 00F<lf> // Even more vectors *R 3<lf> 00 10 011 0 ABC<lf>

NOTE: The LABel sequence specified in the 8th through 12th lines results in a

specific bit assignment. A different ordering of the LABel commands would give a different ordering to the bits.

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Importing Agilent 16522A ASCII Files

ASCII Disk File Identifier

The first line of a disk file must contain the text string "ASCII 000000". It consists of the text "ASCII" followed by 5 blanks, then 6

zeros. The purpose of this string is to uniquely identify the file as an ASCII disk file.

Example

ASCII File Commands

The following commands are used in the ASCII file to configure Sequence and Format. Commands are not case sensitive. Lowercase letters in an illustrated command simply show the long and short form difference.

The uppercase letters of the command show the mandatory portions of each command.

Commands

“ASCDown Command” on page 33

FORMat Commands

MODe (see page 36)

CLOCk (see page 36)

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Importing Agilent 16522A ASCII Files

DELay (see page 37)

ASCII Disk File Indentifier (see page 32)

“LABel Command” on page 33

“VECTor Command” on page 34

ASCDown Command

The ASCDown command was formerly used to signal the start of an ASCII file load. It causes the current pattern generator label and sequence structures to be cleared and reset to a default state. The Agilent 16720A pattern generator now does this automatically.

Example

LABel Command

The LABel command is a special means of specifying labels for use by an ASCII file. The label bits are assigned from most to least significant bits across the output pods. You must specify the label string (quotation marks on the string are optional) and the width of the field. The label base defaults to hexadecimal. There are a maximum of 126 labels. No label may be more than 32 bits wide. If a label is too wide (too many bits) for the remaining unused pattern generator bits, it will be discarded.

Command Syntax

LABel <name_str>,<width>

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing Agilent 16522A ASCII Files

<name_str> = label string a maximum of 20 characters in length. <width> = integer number of bits in the label (1 through 32).

Example

VECTor Command

The VECTor command is used after the end of the header/setup commands to signal the start of the actual pattern generator data in an ASCII file. No data is allowed in the same line as the VECTor command.

Example

Vector Data

The data portion of the ASCII file is an array of hexadecimal data fields. Each row of the array corresponds to a single line of the main program. Each column of the array corresponds to a single label as defined under

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing Agilent 16522A ASCII Files

the pattern generator Format tab.

Data fields are separated by one or more blank characters. A line termination (line feed or carriage return + line feed) signals the end of a line and the start of a new line. If a data field has more data than the label width would indicate, only the least significant bits of the data field are used. If there are more data fields in a row than there are labels, the extra data fields (last data fields in the row) are ignored. If there are fewer data fields in a row than there are labels, the data for the extra (right-most) labels will be zero.

The MAIN sequence must have at least two data lines. In the ASCII data file, a row consisting of only "*M" signals the start of the MAIN sequence. If there is to be no data in the INIT sequence, the first row of the file after the VECTor command must be "*M". Note that the quotation marks in "*M" are not really in the file.

CAUTION: Any character that is not a valid hexadecimal digit (that is, 0 through 9, or

upper/lower case A through F) are ignored and treated as field separators. This could cause problems if a mistyped character appears in the middle of a data value. For example, "12R4" will be assigned to two labels as "12" and "4".

Either of the INIT or MAIN sequences can include multiple Repeat indicators specified by "*R <count>". Note that the quotation marks around the Repeat indicator are not part of the indicator, and like the "*M", the "*R <count>" must be located on a separate line.

The Repeat indicator specifies that the previous data vector is repeated <count> more times, where <count> is a positive integer. The Repeat indicator must follow a sequence line containing a data vector or another Repeat indicator. Placing the Repeat indicator after the VECTor command or the "*M" will cause an error message to appear.

The last data row of the file must end with a line termination character. The line termination character is the flag to load the data row into the data structure. Failure to do this will result in the last data row not being loaded.

The ASCII file import mechanism assumes correctness in the data file and any header commands. Error handling is basic, and treating unexpected characters as field separators could create bizarre results when parsing the file. Error messages point to the line number where

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing Agilent 16522A ASCII Files

the parser finds the error.

Serious problems will cause the default main program to be loaded in an effort to avoid locking up the logic analysis system.

FORMat:MODe Command

The FORMat:MODe command is optional. The existing mode scheme is used if nothing is specified. FULL channel output mode limits the data rate to a maximum of 180 MHz, but allows 48 channels per card. HALF channel output mode allows an output rate of greater than 180 MHz, but limits the number of channels to 24 per card.

Command Syntax

FORMat:MODe [FULL|HALF]

Example

FORMat:CLOCk Command

The FORMat:CLOCk command is optional. The existing clock scheme is used if nothing is specified. The CLOCk command specifies the clock source for the pattern generator.

Command Syntax

FORMat:CLOCk INTernal, <clk_period>

= a real number value that corresponds to the interface selectable clock period values (example = 5E-9).

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Importing Agilent 16522A ASCII Files

FORMat:CLOCk EXTernal, [LEFifty|GTFifty|GTONe] [LEFifty] = Less than or equal to 50 MHz. [GTFifty] = Greater than 50 MHz and less than or equal to 180 MHz. [GTONe] = Greater than 180 MHz.

NOTE: The maximum clock rate is limited by the channel mode. See FORMat:MODe

(see page 36) command.

Example

FORMat:DELay Command

The FORMat:DELay command is optional. The existing delay scheme is used if nothing is specified. The DELay command specifies the clock out delay. The clock out delay setting allows positioning of the clock with respect to the data. Delay setting range is 0 - 14 with each increment delaying the clock approximately 500 ps per step.

NOTE: The delay setting that corresponds to zero is uncalibrated. You must measure

it to determine the basic clock/data timing.

Command Syntax

FORMat:DELay <delay_arg> <delay_arg> = an integer from 0 to 14 with each increment delaying

the clock by approximately 500 ps.

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Importing Agilent 16522A ASCII Files

Example

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Importing Agilent 16720A PattGen Binary Files

You can create a PattGen Binary file and import it as a complete pattern generator program. In general, the PattGen Binary file consists of a set of ASCII commands followed by a binary representation of the vectors. The file must be organized as shown in step 1 of the procedure below.

1. Create the PattGen Binary file (see page 40).

2. Make the file available in a directory on your logic analysis system hard drive using the various connectivity methods available from the logic analysis system. These include FTP, NFS, or PC file sharing.

3. Under the Format tab, select File, then select Import PattGen Binary File. See the Caution Below

4. From the file selection dialog, select the desired path and PattGen Binary file name.

5. Select Import.

CAUTION: Importing an Agilent 16720 PattGen Binary file causes all current Format

and Sequence information to be overwritten. Be sure to save the pattern generator configuration before you begin the import process.

When a PattGen Binary file is loaded, the GUI changes in the following ways:

• The Sequence and Macro tabs are disabled.

• The Output Mode (full channel/half channel) button is disabled.

• Channel assignments can not be edited.

The reason for each of these changes is the same. When a PattGen Binary file is loaded, it is loaded directly into the 16720A hardware. Because PattGen Binary files can be very large there is no internal representation that can be edited and/or displayed as there is for the 16522A ASCII or System Date files.

Changing among Full and Half channel modes requires memory to be reloaded. Changing channel assignments or adding labels with channel

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assignments also requires memory to be reloaded.

If you save a configuration after loading a PattGen file, the configuration will not contain the binary data. You will have to reload the original PattGen Binary file.

Vectors that are loaded from a PattGen Binary file can be viewed in a Listing Window attached to the output of the 16720A icon on the Workspace. The Listing Window displays vectors by reading them from memory on 16720A card.

You can exit the Binary Mode (where editing is disabled) either by loading a non-binary file (i.e. 16522A ASCII) or by selecting Enable Sequence Tab in the File menu. This causes the vectors that were loaded from the binary file to be replaced by the default vectors, which are two vectors of all zero values.

Creating a PattGen Binary File

The PattGen Binary is primarily designed for deep (>1048576) vector sets and the various other formats (i.e. 16522A ASCII) will be used for shorter sets. The deep vector sets can be generated from tools, such as Verilog simulators, and translated to PattGen Binary by third party tools or customer-developed translation utilities. The changes to vectors, labels, etc. should be made in the tool that originally generated the vectors (i.e. Verilog).

Example

C/C++ code for generating PattGen Binary is available on the logic analysis system in the directory /logic/demo/pattgen which contains these files.

• simple_pg.c- A very simple example of how to generate PattGen Binary.

• simple pgb- The PattGen Binary file created by simple_pg.c

• pattgen.c- A more extensive example with command line options.

• binary_yacc.y- A simple utility that will parse and print PattGen Binary.

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• binary_lex.1- A simple utility that will parse and print PattGen Binary.

• makefile- Rules for building the examples with typical C/C++ compilers.

• ToolDevKit - A directory containing instructions for installing a Workspace

Tool that will generate a PattGen Binary file from vectors captured with a logic analyzer. See the README file in that directory for details.

• fastReader - A utility that will translate Fast Binary files to PattGen Binary files. Source code and a .exe file are included. See the README file in that directory for details.

File Requirements and Precautions

• The file must contain only specified pattern generator commands (see page 42), and in the order and format shown in the example below.

• The file must be created in binary byte-stream format.

• Vector data must be entirely in binary.

• No pattern generator instructions are allowed in the data.

• No pattern generator macros are defined or invoked in the data.

• Labels may consist of adjacent bits or arbitrarily ordered bits.

• Each ACSII command must end with a line termination character (line

feed "<lf>" or a carriage return and line feed "<CR><lf>"

• Comments can be included after the first command (PGBINARY).

• Comments begin with a slash '/' and terminate at the end of the line.

PattGen Binary Example

NOTE: In this example only the ASCII pattern generator commands are shown. The

binary vector data is not illustrated. This example is available on the logic analysis system in the file /logic/pattgen/demo/simpe.pgb.

PGBINARY MODE FULL CLOCK INTERNAL 5e7 MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0]

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LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] WIDTH 6 DEPTH 4096 BEGIN

NOTE: The LABEL sequence specified in the 5th through 10th lines results in a

specific bit assignment. Different POD assignments in those LABEL commands would give a different ordering to the bits.

PattGen Binary File Identifier

The first line of a PattGen Binary file must contain the text string "PGBINARY". The purpose of this string is to uniquely identify the file as a PattGen Binary file.

Example

PGBINARY MODE FULL CLOCK INTERNAL 5e7 // 50 MHz MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0} LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] WIDTH 6 DEPTH 4096 BEGIN

Binary File Commands

The following ASCII commands are used in the PattGen Binary file to configure Sequence and Format. Commands may be all uppercase or

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all lowercase, but not mixed. Commands may not be abbreviated or truncated.

Commands

PattGen Binary File Identifier (see page 42)

CLOCK (see page 43)

DELAY (see page 44)

MODE (see page 45)

RMODE (see page 46)

LABEL (see page 46)

ORDER (see page 49)

WIDTH (see page 50)

DEPTH (see page 50)

BREAK (see page 52)

EVENT (see page 52)

WAIT (see page 53)

SIGNAL (see page 54)

MAIN (see page 55)

BEGIN (see page 56)

Binary Data (see page 57)

CLOCK Command

The CLOCK command is optional. The existing clock scheme is used if nothing is specified. The CLOCK command specifies the clock source for the pattern generator.

Command Syntax

CLOCK EXTERNAL

Set the clock mode to externally clocked.

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NOTE: The maximum clock rate is limited by the channel mode. See MODE

command.

Example

PGBINARY MODE FULL CLOCK INTERNAL 5e7 // 50 MHz MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0] LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] WIDTH 6 DEPTH 4096 BEGIN

DELAY Command

The DELAY command is optional. The existing delay scheme is used if nothing is specified. The DELAY command specifies the clock out delay. The clock out delay setting allows positioning of the clock with respect to the data. Delay setting range is 0 - 14 with each increment delaying the clock approximately 500 ps per step.

NOTE: The delay setting that corresponds to zero is uncalibrated. You must measure

it to determine the basic clock/data timing.

Command Syntax

DELAY <delay_arg> <delay_arg> = an integer from 0 to 14 with each increment delaying the clock by approximately 500 ps.

Example

PGBINARY MODE FULL

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CLOCK INTERNAL 5e7 // 50 MHz DELAY 6 MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0] LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] WIDTH 6 DEPTH 4096 BEGIN

MODE Command

The MODE command is optional. The existing mode scheme is used if nothing is specified. FULL channel output mode limits the data rate to a maximum of 180 MHz, but allows 48 channels per card. HALF channel output mode allows an output rate of up to 300 MHz, but limits the number of channels to 24 per card.

Command Syntax

MODE [FULL|HALF]

Example

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RMODE Command

The RMODE command is optional. The existing run mode scheme is used if nothing is specified. SINGLE indicates that a run will output the INIT part followed by the MAIN part one time each. REPETITIVE indicates that a run will output the INIT part once followed by the MAIN part repeating until the STOP icon is selected.

Command Syntax

RMODE [SINGLE][REPETITIVE]

Example

PGBINARY MODE FULL RMODE SINGLE CLOCK INTERNAL 5e7 // 50 MHz MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0] LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] WIDTH 6 DEPTH 4096 BEGIN

LABEL Command

The LABEL command is a special means of specifying labels for use by a PattGen Binary file. The first <integer> following the POD keyword is the pod number. Pods are numbered from 0...N where N is the maximum number pods in a logic analysis system minus 1. In the 16720A the number of pods would be 0...29 in Full channel mode or

0...14 in Half channel mode when five cards are connected as a master card and four expander cards. The pods are numbered from left to right. By using index numbers rather than the names they would have in the logic analysis system (i.e. B6 for Pod 6 in Slot B) the command is independent of how the logic analysis system is configured. Bit

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assignment are from Most Significant Bit to Least Significant Bit.

Command Syntax

LABEL <name> { POD <integer> { <integer> | [ <integer> : <integer> ] }} <name_str> = label string a maximum of 20 characters in length. The name string must begin with a letter (A-Z, a-z) or underscore (_) and can be followed by letters, underscores, or digits (0-9). A label may not be a keyword (see page 48). If you wish to use a keyword as a label, you may do so by enclosing it in quotes. <integer> = POD index or bit number.

Example

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Example

PGBINARY MODE FULL RMODE SINGLE CLOCK INTERNAL 5e7 // 50 MHz MAIN 0 LABEL Select0 POD 0 7 LABEL Select1 POD 0 6 LABEL IN_BUS0 POD 0 [5:2] LABEL IN_BUS1 POD 0 [1:0] POD 1 [7:6] LABEL IN_BUS2 POD 1 [5:2] LABEL IN_BUS3 POD 1 [1:0] POD 2 [7:6] LABEL OUT_BUS POD 2 [5:2] WIDTH 7 DEPTH 4096 BEGIN

Keywords

The following are keywords in the PattGen Binary file and may not be used as labels.

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ORDER Command

The Order command provides an optional means for specifying the order that data for labels will appear. If the order is not specified it is assumed to be the order in which labels were defined. If the ORDER command contains only a subset of the labels that have been defined, then the subsequent BEGIN command refers only to the labels named in the ORDER command.

Command Syntax

ORDER { <name_str> } <name_str> = label string a maximum of 20 characters in length.

Example

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WIDTH Command

The WIDTH command defines how wide, in number of bytes, the binary data will be. The width is determined by summing the size, rounded up to full bytes, of every label that is defined or named in an ORDER command. The total number of data bytes in the file must be (DEPTH * WIDTH). WIDTH must be defined before the binary data part begins. The binary data part also contains the width. This redundant information is used as one verification of the binary data.

Command Syntax

WIDTH <integer> <integer> = number of bytes wide the binary data will be.

Example

DEPTH Command

The DEPTH command defines how may vectors will appear in the binary data. The total number of bytes in the binary data part of the file must be (DEPTH * WIDTH). DEPTH must be defined before the binary data part begins. The binary data part also contains the depth. This redundant information is used as one verification of the binary data.

The DEPTH has the following restrictions based on the MODE (FULL

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or HALF) that the instrument will be in.

FULL Channel Mode

• INIT part must be an even number of vectors.

• MAIN part must be an even number of vectors.

• Total depth can be no more than 8,388,608.

• Total depth can be no less than 4, 096.

HALF Channel Mode

• INIT part must be a multiple of 4 vectors.

• MAIN part must be a multiple of 4 vectors.

• Total depth can be no more than 16,777,216.

• Total depth can be no less than 4,096.

Command Syntax

DEPTH <integer> <integer> = number of vectors in the binary data.

Example

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BREAK Command

The BREAK command places a hardware BREAK instruction on a vector number <integer>. Vectors are numbered from 0 to DEPTH - 1.

Command Syntax

BREAK <integer> <integer> = the vector where a hardware BREAK instruction is to be placed.

Example

NOTE: A BREAK instruction can go on any vector except the first vector or the last

vector. The last vector instruction is used to implement single and repetitive run modes and is not available for other instructions. Attempting to place an instruction on or beyond the last vector is an error.

EVENT Command

The EVENT command sets a pattern into one of the four external event registers. These event registers can be specified in WAIT instructions. If the pattern is NONE then a wait on this event will always wait. If the pattern is an integer, its value is interpreted according to the following table.

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Values can be ORed together, i.e. a value of #H22 would indicate patterns of ( 101 + 001 ).

Command Syntax

EVENT [ A | B | C | D ] [ NONE | <integer> ] A, B, C, D = four external wait event registers. NONE - value that indicates "always wait". <integer> = the event pattern from the table above.

Example

PGBINARY MODE FULL RMODE SINGLE MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0] LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] EVENT A #H01 WAIT A 100 WIDTH 6 DEPTH 4096 BEGIN

WAIT Command

The WAIT command places a hardware instruction on vector number

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<integer>. Vectors are numbered from 0 to DEPTH -1. There can only be one WAIT INB instruction in a configuration.

Command Syntax

WAIT [ IMB | A | B | C | D ] <integer> IMB = Inter-Module Bus. A, B, C, D = external wait events. <integer> = the vector where a hardware WAIT instruction is to be placed.

Example

NOTE: A WAIT instruction can go on any vector except the first vector or the last

SIGNAL Command

The SIGNAL command places a hardware SIGNAL IMB instruction on vector number <integer>. Vectors are numbered from 0 to DEPTH -1.

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There can only be one SIGNAL instruction in a configuration.

PGBINARY

MODE FULL RMODE SINGLE CLOCK INTERNAL 5e7 // 50 MHz MAIN 0 LABEL Label0 POD 0 [7:0] LABEL Label1 POD 1 [7:0] LABEL Label2 POD 2 [7:0] LABEL Label3 POD 3 [7:0] LABEL Label4 POD 4 [7:0] LABEL Label5 POD 5 [7:0] SIGNAL 100 WIDTH 6 DEPTH 4096 BEGIN

NOTE: A SIGNAL instruction can go on any vector except the first vector or the last

MAIN Command

The MAIN command gives the vector number where the MAIN part of the vector set begins. The vectors prior to the MAIN vector comprise the INIT part. This is defaulted to zero (no INIT part). Vectors are numbered from 0 to DEPTH -1.

Command Syntax

MAIN <integer> <integer> = the vector number where the MAIN part of the vector set begins.

Example

PGBINARY

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BEGIN Command

The BEGIN command is the last command in the ASCII part of the file. It is terminated with a newline or a comment like all other commands. The binary data immediately follows the newline.

Command Syntax

BEGIN <binary data>

Example

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BEGIN

Binary Data

The Binary Data begins with a simple eight byte header that gives the DEPTH and WIDTH in binary. These values must match the DEPTH and WIDTH given as ASCII commands earlier in the file. These values must be written as 32 bit integers in big-endian order, i.e. the first byte is the most significant byte. This is followed by the binary data itself.

• 4 bytes = number of vectors.

• 4 bytes = number of bytes per vector.

• (WIDTH * DEPTH) bytes = the binary data.

Each vector is comprised of one value for each LABEL that has been defined or named in an ORDER command. The number of bytes for each label is the lowest possible integer number of bytes given the bit width of the label. For example, a 17 bit label will require 3 bytes (24bits), a 16 bit label will require 2 bytes (16 bits).

The bytes are taken to be in big-endian order. If a label is comprised of a smaller number of bits than are written for that label (i.e. a 17 bit label that receives 24 bit data) the least significant bits are used and the excess most significant bits are discarded. This number must match the number of bytes required for the labels that have been defined or named in an ORDER command.

The remaining length of the file after the newline following “BEGIN” must be (8 + DEPTH + WIDTH).

If a LABEL is defined for pods that are not in the current hardware (i.e. POD 7 for a 1 board system) the configuration is truncated to what fits and a warning is emitted.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Importing System Data Files

If you store logic analyzer data using the File Out tool, in either Internal, ASCII, or Fast Binary format, you can import these files into the pattern generator’s INIT or MAIN sequences.

The "Import System Data File" dialog will only load files saved using the File Out tool. For ASCII files created in a PC or UNIX text editor, use Import 16522A ASCII File (see page 28). For PattGen Binary files created in a PC or UNIX program, use Import 16720A PattGen Binary File (see page 39).

CAUTION: Importing a File Out tool file causes all current Format and Sequence

information to be overwritten. Be sure to save the pattern generator configuration before you begin the import process.

NOTE: Importing a 1048576 line System Data file may take approximately two

minutes. If a 1048576 sequence is in memory when you begin an import, it may take up to a minute to clear the current data and up to two minutes to import the new data.

1. Select the Sequence tab.

2. Select File from the menu bar, then Import System Data File.

3. From the Import System Data File dialog, load the desired File Out tool file. See the note below.

4. Select the desired data set (see page 59).

5. Select the desired labels (see page 59).

6. Select a data set range (see page 60) to import. If you select "Partial", the range integers you specify will correspond to state numbers found in a state listing of the same data set.

7. Select the location to insert the samples. Samples are inserted at the beginning of the selected sequence. See the caution below.

8. Select Import.

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Importing System Data Files

NOTE: If in step 3 you entered the file name into the text entry field using a keyboard,

you must press the Return key on your keyboard to start the file import process instead of selecting the Import field.

Data Sets

A data set is defined as data captured from a single source. For example, the data captured from analyzer one of a logic analyzer is a single source. Because the File Out tool allows multiple analyzers worth of data to be stored within the same file, you pick only one data set to import into the pattern generator.

Data Set Labels

All labels in a single data set are listed along with each label’s corresponding channel width. If a label is wider than the pattern

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Importing System Data Files

generator’s maximum allowable channel width (32 channels), the label is marked "unavailable". Labels wider than 32 channels cannot be selected.

Data Set Range

When you select a data set, the "from" and "to" fields update to the minimum and maximum values of the state listing. Both positive and negative integers are valid.

CAUTION: If the range of data samples is too large for the pattern generator sequence

(1048576 vectors), a message will appear giving you the choice to continue or not. If you continue, data will be imported starting from the beginning of the file. At the point where you run out of vectors, data will be missing. To solve this problem, reduce the range of samples you are importing.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Loading and Saving Pattern Generator Configurations

You can save pattern generator settings and data to a configuration file. You can also save any tools connected to the pattern generator. Later, you can restore your data and settings by loading the configuration file.

• Loading Configuration Files (see the Agilent Technologies 16700A/B- Series Logic Analysis System help volume)

• Saving Configuration Files (see the Agilent Technologies 16700A/B- Series Logic Analysis System help volume)

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Selecting the Correct Probe Pod

The following equivalent circuit information is provided to help you select the appropriate clock and data pods for your application.

“Data Pod Descriptions” on page 63

“Clock Pod Descriptions” on page 67

Data Cable Characteristics without a Data Pod

The data cables without a data pod provide an ECL-terminated (470 ohm; to -3.25V) differential signal. These signals are usable when received by a differential receiver, preferably with a 100 ohm termination across the lines. These signals should not be used singleended due to the slow fall time and shifted voltage threshold; they are not ECL compatible.

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Clock Cable Characteristics without a Clock Pod

The clock out signals (CLKOUT and not-CLKOUT) without a clock pod provide an ECL-terminated (215 ohm to -3.25V) differential signal. These signals are usable when received by a differential receiver, preferably with a 100 ohm termination across the lines. These signals should not be used single-ended due to the slow fall time and shifted voltage threshold; they are not ECL compatible.

See Also “Connecting the Probe Pods” on page 71

Data Pod Descriptions

E8141A LVDS Data Pod

Output type 65LVDS389 (LVDS data lines) 10H125 (TTL non-3-state channel 7) 3-state enable positive true TTL; no connect=enabled Maximum clock 300 MHz Skew Typical less than 1 ns, worst case 2 ns Recommended lead set E8142A

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10473A 3-State 2.5 V Data Pod

Output type 74AVC16244 3-state enable negative true, no connect=enabled Maximum clock 300 MHz Skew Typical less than 1 ns, worst case 2 ns Recommended lead set 10498A

10476A 3-State 1.8 V Data Pod

Output type 74AVC16244 3-state enable negative true, no connect=enabled Maximum clock 300 MHz Skew Typical less than 1.5 ns, worst case 2.5 ns Recommended lead set 10498A

10483 3-State 3.3V Data Pod

Output type 74AVC16244 3-state enable negative true, no connect=enabled Maximum clock 300 MHz Skew Typical less than 1 ns, worst case 2 ns Recommended lead set 10498A

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10469A PECL Data Pod

Output type 100EL09 (5V) with 348 pulldown to ground and 42 ohm in series Maximum clock 300 MHz Skew Typical less than 500 ps, worst case 1 ns Recommended lead set 10498A

10471A LVPECL Data Pod

Output type 100LVEL90 (3.3V) with 215 ohm pulldown to ground and 42 ohm in series Maximum clock 300 MHz Skew Typical less than 500 ps, worst case 1 ns. Recommended lead set 10498A

10461A TTL Data Pod

Output type 10H125 with 100 ohm in series Maximum clock 200 MHz Skew Typical less than 2 ns; worst case 4 ns (note 1) Recommended lead set 10498A

10462A 3-State TTL/CMOS Data Pod

Output type 74ACT11244 with 100 ohm in series 10H125 on non 3-state channel 7 (note 2), 3-state enable negative true, 100K ohm to GND, enabled on no connect. Maximum clock 100 MHz Skew Typical less than 4 ns; worst case 12 ns (note 1) Recommended lead set 10498A

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10464A ECL Data Pod (terminated)

Output type 10H115 with 348 ohm pulldown, 42 ohm in series Maximum clock 300 MHz Skew Typical less than 1 ns; worst case 2 ns (note 1) Recommended lead set 10498A

10465A ECL Data Pod (unterminated)

Output type 10H115 (no termination) Maximum clock 300 MHz Skew Typical less than 1 ns; worst case 2 ns (note 1) Recommended lead set 10347A

10466A 3-State TTL/3.3 volt Data Pod

Output type 74LVT244 with 100 ohm in series 10H125 on non 3-state channel 7 (see note 2) 3-state enable negative true, 100K ohm to GND, enabled on no connect. Maximum clock 200 MHz Skew Typical less than 3 ns; worst case 7 ns (note 1) Recommended lead set 10498A

Note 1

Typical skew measurements made at the pod connector with approximately 10 pF/50K ohm load to GND; worst case skew numbers are a calculation of worst case conditions through circuits. Both numbers apply to any channel within a single or multiple module system.

Note 2

Channel 7 on the 3-state pods has been brought out in parallel as a non 3-state signal. By looping this output back into the 3-state enable line, the channel can be used as a 3-state enable.

See Also “Clock Pod Descriptions” on page 67

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Selecting the Correct Probe Pod

“Connecting the Probe Pods” on page 71

Clock Pod Descriptions

E8140A LVDS Clock Pod

Clock output type 65LVDS179 (LVDS) and 10H125 (TTL) Clock output rate 200 MHz maximum (LVDS and TTL) Clock out delay approximately 8 ns total in 14 steps Clock input type 65LVDS179 (LVDS with 100 ohm) Clock input rate DC to 150 MHz (LVDS) Pattern input rate 10H124 (TTL) (no connect=logic 1) Clock in to clock out approximately 30 ns Patt in to recognition approximately 15 ns + 1 clock period Recommended lead set 10498A

10472A 2.5 V Clock Pod

Clock output type 74AVC16244 Clock output rate 200 MHz maximum Clock out delay approximately 8 ns total in 14 steps Clock input type 74AVC16244 (3.6 V maximum) Clock input rate DC to 200 MHz Pattern input rate 74AVC16244 (3.6 V maximum; no connect=logic 0) Clock in to clock out approximately 30 ns Patt in to recognition approximately 15 ns + 1 clock period Recommended lead set 10498A

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10475A 1.8 V Clock Pod

10477A 3.3 V Clock Pod

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10468A PECL Clock Pod

Clock output type 100EL90 (5V0 with 348 ohm pulldown to ground and 42 ohm in series Clock output rate 300 MHz maximum Clock input delay approximately 8 ns total in 14 steps Clock input type 100EL91 PECL (5V), no termination (no connect is logic 0) Clock input rate DC to 300 MHz Pattern input type 100EL91 PECL (5V), no termination (no connect is logic 0) Recommended lead set 10498A

10470A LVPECL Clock Pod

Clock output type 100LVEL90 (3.3V) with 215 ohm pulldown to ground and 42 ohm in series Clock output rate 300 MHz maximum Clock out delay approximately 8 ns in 14 steps Clock input type 100LVEL91 PECL (3.3V), no termination Clock input rate DC to 300 MHz Pattern input type 100LVEL91 PECL (3.3V), no termination Clock in to clock out approximately 30 ns Patt in to recognition approximately 15 ns + up to 1 clock period Recommended lead set 10498A

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10460A TTL Clock Pod

Clock output type 10H125 with 42 ohm series; true & inverted Clock output rate 100 MHz maximum Clock out delay 8 ns maximum in 14 steps Clock input type TTL - 10H124 Clock input rate DC to 100 MHz Pattern input type TTL - 10H124 (no connect is logic 1) Clk-in to clk-out Approx. 30 ns Patt-in to recognition Approx. 15 ns + up to 1 clk period Recommended lead set 10498A

10463A ECL Clock Pod

Clock output type 10H116 differential unterminated; differential with 348 ohm to -5.2v and 42 ohm series Clock output rate 300 MHz maximum Clock out delay 11 ns maximum in 9 steps Clock input type ECL - 10H116 with 50K ohm to -5.2v Clock input rate DC to 300 MHz Pattern input type ECL - 10H116 with 50K ohm (no connect is logic 0) Clk-in to clk-out Approx. 30 ns Patt-in to recognition Approx. 15 ns + up to 1 clk period Recommended lead set 10498A

See Also “Data Pod Descriptions” on page 63

“Connecting the Probe Pods” on page 71

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Connecting the Probe Pods

NOTE: Clock and Data pods are required for a proper signal interface. There are

different types (see page 62) available, and they should match your target circuit characteristics. In addition, depending on the Vector Output Mode (see page 12) selected, some pods may not be available for use.

Direct Pod-to-Board Connection

Plug the pod directly into the ©3M 2520-series, or similar alternative connector on the PC board.

Jumper Cable-to-Pod Connection

Use this method when you have clearance problems on the PC board. Construct a flat-ribbon cable and connect as shown above.

NOTE: You can obtain equivalent connectors from sources other than 3M.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Connecting the Probe Pods

Probe Lead Set to Board Pin Connection

Two probe lead assemblies are available for connecting to PC board pins.

• 10498A 8-channel probe lead set.

• 10347A 8-channel probe lead set, 50-ohm coaxial for unterminated signals.

The probe tips of both lead sets plug directly into any 0.1-inch grid with

0.026- to 0.033-inch diameter round pins or 0.025-inch square pins. These probe tips work with the 5090-4356 surface mount grabbers and the 5959-0288 through-hole grabbers.

NOTE: The LVDS Data Pod must be connected to the leads in such a way that the

striped row of cables faces up.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Editing Sequences

•“Cutting, Copying, Pasting, and Deleting Sequence Lines” on page 73

•“Deleting Sequence Lines” on page 74

•“Inserting Blank Sequence Lines” on page 75

•“Go to a Line Number” on page 76

•“Positioning the Sequence” on page 76

•“Using Ditto " values” on page 77

Cutting, Copying, Pasting, and Deleting Sequence Lines

NOTE: When you use the Cut and Copy operations from the menu bar, you are

placing the sequence lines in a temporary storage buffer. All subsequent Paste operations will insert sequence lines from the storage buffer until new lines are cut or copied. When you use the Delete operation from the menu bar, the sequence lines are not placed in the temporary buffer. They are just deleted.

1. Select the sequence lines to cut, copy, or delete by highlighting the first line.

2. To select the entire sequence, select Edit from the menu bar, then Select All Lines.

3. From the menu bar, select Edit, then Cut Line(s), Copy Line(s), or Delete Lines(s).

4. Select the sequence line just above where you want to paste the sequence lines. This positions the cursor. When pasting sequence lines, the lines are placed after the cursor line.

5. If you are pasting cut or copied lines, select Edit from the menu bar, then Paste Line(s).

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Editing Sequences

NOTE: Cutting or deleting all the sequence lines causes the sequence to be reset to

the power-up state.

Restrictions on Use

The above operations will not be allowed if the result of the operation places an instruction on one of the following vectors:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

In addition, the above operations will not be allowed if the result of the operation places a hardware instruction immediately after another instruction. Hardware instructions must follow data vectors.

Deleting Sequence Lines

CAUTION: When you delete sequence lines, they are permanently removed. If you want

to place them in a temporary storage buffer, use the Cut (see page 73) operation from the menu bar.

NOTE: To highlight a line, drag from the bottom of the desired line to the top of the

desired line.

Deleting Single Lines

• To delete single lines, highlight the line that is to be deleted.

• Select Delete Line(s) from the Edit menu.

Deleting Multiple Lines

• To delete multiple lines, highlight the lines that are to be deleted.

• Select Delete Line(s) from the Edit menu.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Editing Sequences

Delete All Lines

To delete all lines in a sequence, go to the menu bar and select Edit -> Select All Lines, then Edit -> Delete Lines(s). Deleting all lines causes

the sequence to be reset to the power-up state.

Restrictions on Use

You are not allowed to delete the following sequence lines:

• The INIT START line.

• The INIT END line.

• The MAIN START line.

• The MAIN END line.

• The MACRO START line.

• The MACRO END line.

A delete will not be performed if the result of the delete places an instruction on one of the following lines:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

A delete will not be performed if the result of the delete does either of the following:

• Places a hardware instruction immediately after another instruction.

• Causes the MAIN sequence to contain fewer than two data vectors.

Inserting Blank Sequence Lines

Inserting blank lines (see page 77) is a very useful operation when starting a new sequence. After you insert a new line, you replace the ditto values with the desired normal data values.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Editing Sequences

Inserting Blank Lines

1. To position the cursor, select the vector line directly above where you want to insert lines.

2. Select Insert After, then select Vector to insert a new vector line.

3. Repeat for each new vector line you want to insert.

NOTE: You can also insert blank sequence lines by using the keyboard as follows: *

Select the vector line directly above where you want to insert the new data vector. * Press the Insert key on your keyboard one time for each new vector line you want to insert.

NOTE: The new blank lines are inserted with ditto values.

See Also

“Using Ditto " values” on page 77

Go to a Line Number

1. From within the Sequence or Macro tab, select any vector line.

2. Select Goto Line.

3. In the Goto Line dialog that appears, enter the desired line number.

4. Select OK.

See Also

“Positioning the Sequence” on page 76

Positioning the Sequence

Using the Keyboard

Among the keyboard keys that insert and delete data vectors, the pattern generator defines four other keys used to position the

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Editing Sequences

sequence when either the Sequence or Macro tab is active. Specifically, these additional keys are defined:

1. Home - move to the first line of the sequence.

2. End - move to the last line of the sequence.

3. Page Up - scroll upward by one screen worth of data.

4. Page Down - scroll downward by one screen worth of data.

To use the positioning keys, perform the following steps:

1. From within Sequence or Macro, select any vector line.

2. Press one of the above keys on the keyboard.

See Also

“Go to a Line Number” on page 76

Using Ditto " values

In any existing data vector, with the exception of the first, you can replace normal data values with ditto values (designated by the double quotation marks).

Ditto values indicate that the previous data value should be repeated for the current data vector. Ditto values save you effort by requiring you to only enter in the data values that change.

NOTE: When you insert blank lines, they are inserted as ditto values.

1. From either the Sequence or Macro tab, select the data field that you want to edit. This positions the cursor.

2. Select Insert After.

3. Select Vector.

See Also

“Inserting Blank Sequence Lines” on page 75

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Instruction Types

Instructions are like programming commands. They are inserted into a sequence for the purpose of executing their designated control over the flow of the sequence. There are two types of instructions: hardware and software. The differences between these types are described below.

Inserting Instructions into Sequences

1. Select the vector line directly above where you want to insert the new instruction.

2. Select Insert After.

3. Select the desired instruction to insert.

Hardware Instruction Types

The following hardware instruction types are available. Each of these instructions can affect external hardware or the pattern generator hardware.

•“The Break Instruction” on page 79

•“The Signal IMB Instruction” on page 79

•“The Wait IMB Event Instruction” on page 80

•“The Wait External Event Instruction” on page 80

Software Instruction Types

The following software instruction types are available. Each of these instructions only affects the execution flow of the currently running sequence. However, a User Macro software instruction can include hardware instructions.

•“The User Macro Instruction” on page 81

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

•“The Repeat Loop Instruction” on page 82

See Also “Building a Main Sequence” on page 23

“Building an Initialization Sequence” on page 21

“Building a User Macro” on page 25

The Break Instruction

The Break instruction causes a break at the current vector. In single run mode, this instruction halts the sequence and holds the outputs at the value of the previously outputted data value. In repetitive run mode, this instruction pauses the sequence at the current vector momentarily, then continues. The duration of the pause depends on the activity of other modules in the frame.

Working with Instruction Types

Restrictions on Use

The Break instruction must follow data vectors. Also, the Break instruction is not allowed on the following vector lines of a sequence:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

The Signal IMB Instruction

The Signal IMB instruction creates an arming signal on the intermodule bus when the instruction is executed. This arming signal allows the pattern generator to cross trigger other modules in the frame.

Restrictions on Use

The Signal IMB instruction, as with all hardware instructions, must follow data vectors. Also, the Signal IMB instruction can only be used

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Working with Instruction Types

one time in a sequence, and consequently it is not allowed in a user macro or a repeat loop. The Signal IMB instruction is not allowed on the following vector lines of a sequence:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

See Also Using the Intermodule Window (see the Agilent Technologies 16700A/B-

Series Logic Analysis System help volume)

The Wait IMB Event Instruction

The Wait IMB Event instruction halts the execution of the program sequence until an IMB signal is received by the pattern generator.

Restrictions on Use

The Wait IMB Event instruction, as with all hardware instructions, must follow data vectors. Also, the Wait IMB Event instruction can only be used one time in a sequence, and consequently it is not allowed in a user macro or a repeat loop. The Wait IMB Event instruction is not allowed on the following vector lines of a sequence:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

The Wait External Event Instruction

The Wait External Event instruction halts the execution of the program sequence until one of four designated events (A-D) is received by the pattern generator.

Because the Wait External Event is an OR’ing function of the toggled

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Instruction Types

"On" wait patterns, as soon as one of the selected wait patterns is satisfied, the sequence continues. The wait patterns are specified on the three input lines of the clock pod: Wait0, Wait1, and Wait2.

To choose and configure a particular event, select the Wait External Event instruction, then from the External Wait Pattern dialog, toggle the appropriate fields.

Restrictions on Use

The Wait External Event instruction, as with all hardware instructions, must follow data vectors. Wait External Events are not allowed on the following vector lines of a sequence:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

The User Macro Instruction

The User Macro instruction lets you insert a group of vectors that have

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Instruction Types

a specific function. At run time, the user macro is expanded into its corresponding vectors. A typical macro application would be a generic test stimulus that is used by multiple circuits. By containing the device or circuit specific test vectors within a macro, you can simply interchange the macro and reuse the same INIT and MAIN SEQUENCE.

Macros can contain parameters. Using parameters in a macro gives you the same benefit as using macros in a sequence. By passing parameters, you can reuse the same macro for other purposes.

Restrictions on Use

The User Macro instruction is not allowed on the following vector lines of a sequence:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

• The last vector of the MAIN sequence.

See Also “Building a User Macro” on page 25

“Working with Macro Parameters” on page 98

The Repeat Loop Instruction

The Repeat Loop instruction inserts the start and end vectors of a repeat loop, along with one blank data vector row, below the selected vector row. Once the loop has been created, you can insert or copy vectors and instructions into the loop.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Instruction Types

Set the number of loop repetitions (maximum 20,000) by selecting the "Start Loop" vector line and editing the Loop Count dialog. At run time, the loop count determines the number of times to expand the loop’s body into individual vectors. Both the start and end vectors of a repeat loop are removed from the sequence if either one is included in a delete operation.

Nested Repeat Loop Instructions

This example shows a nested loop. Loop[1] is a walking ones pattern that is repeated five times. Loop[2] is a bit pattern of all ones that is repeated twice directly in the middle of the walking ones pattern of Loop[1].

Restrictions on Use

The following instructions can NOT be used in a repeat loop:

• The Signal IMB instruction.

• The Wait IMB Event instruction.

The Repeat Loop instruction is not allowed on the following vector lines of a sequence:

• The first or second vector of the INIT sequence.

• The first or second vector of the MAIN sequence.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Instruction Types

• The last vector of the MAIN sequence.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

Access label and pod operations from either the Edit pick in the menu bar, or under the label name field itself. When you select operations from the menu bar, they are global to all labels or pods in the window. When you select operations from under the label name, they are directed at the individual label.

In addition, label and pod operations in the Sequence and Macro displays are centered around adding or deleting. Operations in the Format display are centered around initial creation and configuration.

NOTE: Label operations are performed on labels assigned in Format. If labels are not

created, assigned bits, and turned on in Format, they do not appear in Sequence or Macro. Also, depending on the Vector Output Mode (see page 12), some pods may not be available.

Operations in Format

•“Creating and Inserting New Labels” on page 86

•“Deleting Labels” on page 87

•“Renaming Existing Labels” on page 88

•“Reordering a Label's Pod Bits” on page 89

•“Turning Labels On/Off” on page 89

•“Clearing Format Labels” on page 90

•“Finding a label” on page 92

•“Swap Pods” on page 90

•“Clear Pods” on page 91

•“Assigning Bits to a Label” on page 91

•“Label Polarity” on page 92

Operations in Sequence and Macro

•“Inserting Pre-assigned Labels” on page 88

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

•“Deleting Labels” on page 87

•“Replace Labels” on page 93

•“Finding a label” on page 92

•“Appending Labels” on page 94

•“Insert All Labels” on page 95

•“Delete All Labels” on page 95

•“Searching for Labels” on page 90

•“Setting Column Color” on page 96

•“Adjusting Column Width” on page 96

•“Rearranging the Label Order” on page 97

•“Setting the Numeric Base” on page 97

•“Setting the Label Font Size” on page 95

Creating and Inserting New Labels

Creating New Labels in Format

You create labels in Format to uniquely identify groups of assigned pod bits (see page 91) that have a common purpose or identity. Inserting and assigning labels are part of the mapping process (see page 11) for your application.

1. Select the label where you want to insert the new label, then select Insert before or Insert after.

2. In the Enter Label Name dialog that appears, enter in the new label name. If you do not provide a label name, a default name is assigned.

3. Select OK if you are done, or Apply if you have more labels to insert.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

NOTE: Duplicate label names are not allowed.

Mode

If you are creating a series of new labels, you have the option to automatically assign bits in a "walking ones" pattern across the label series. You do this by toggling the Mode field to Walking ones.

Select the Pod, the starting Bit, and the walk direction. As you enter new label names and select Apply, a single bit is automatically assigned under each new label in a "walking ones" pattern.

Working with Labels and Pods

Deleting Labels

1. Select the label to be deleted.

2. Select Delete.

See Also “Clearing Format Labels” on page 90

“Delete All Labels” on page 95

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

Inserting Pre-assigned Labels

NOTE: If labels are not created, assigned bits, and turned on in Format, they do not

appear in subsequent label operation dialogs in Sequence and Macro.

1. From the Sequence or Macro tab, select the label where you want to insert the new label, then select Insert Before or Insert After.

2. In the Select Label dialog that appears, select the pre-assigned label name to insert.

3. Select OK if you are done, or Apply if you have more labels to insert.

See Also “Searching for Labels” on page 90

Renaming Existing Labels

1. Under Format, select the label you want to rename, then select Rename.

2. In the Rename dialog, enter in the new label name.

3. Select OK if you are done, or Apply if you have more labels to rename.

NOTE: When you select Apply, the next label is automatically highlighted. This lets

you rename multiple labels very quickly.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

Reordering a Label’s Pod Bits

Use the Reorder bits feature to remap the physical probe connections to the interface without changing the actual probe connections. This feature allows the probe tips for each channel to be physically connected where convenient.

1. Under the Format tab, select the label you want to reorder bits on, then select Reorder bits.

2. Set the bit order by one of the following options:

• To reorder bits individually, for each channel, enter the number of the

bits you want to map the channel to.

• To arrange the bits sequentially, select the field at the top of the dialog,

then select Default Order.

• To reverse the order of the bytes, select the field at the top of the

dialog, then select Big Endian - Little Endian mapping. This option is only available for labels that have either 24 or 48 channels.

3. Select OK.

NOTE: Reordering the bits of a label does not reorder the physical output signals of

the channels assigned to that label. The bit order of a label is a displayorientation concept, useful only when entering data values.

Turning Labels On/Off

Turning labels off prevents output signals from appearing on the associated probe channels. When a label is turned off, it is removed from the Sequence and Macro areas. However, the label’s name and bit assignments are preserved.

To toggle labels On/Off in Format, select the label that you want to modify and toggle the Label On/Off selection.

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Working with Labels and Pods

Clearing Format Labels

The Clear Format Labels command is located under Edit in the Format menu bar. When you select Clear Format Labels, all userassigned labels are permanently removed, and the default label Lab1 is reset.

Searching for Labels

In all label selection dialogs, where a list of label names appears, a text entry field is available for a quick search of label names. Simply enter in a search string, and all labels that begin with that string appear in the list.

Swap Pods

The Swap Pods command is located under Edit in the Format menu bar. When you select Swap Pods, the bit assignments for the two designated pods are swapped across all labels.

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Working with Labels and Pods

Clear Pods

The Clear Pods command is located under Edit in the Format menu bar. When you select Clear Pods, all bit assignments for all labels under the designated pod are cleared.

Assigning Bits to a Label

The bits in a label correspond to the physical pattern generator probe channels. When you run the pattern generator, data is output on all bits (channels) that are assigned to labels. Unassigned bits are inactive.

• An asterisk "*" indicates an assigned bit.

• A period "." indicates an unassigned bit.

To Assign Bits

1. Select the bit assignment field to the right of the label name you want to define. Each bit assignment field corresponds to the data pod listed above it.

2. Select the bits you want to change, toggling them between an asterisk and a period.

3. When the bits are assigned as desired, close the dialog box.

Select the bit assignment field or dialog to see a shortcut menu for assigning groups of bits.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

NOTE: Labels can have a maximum of 32 channels assigned to them, however, you

cannot assign any single output channel to more than one label.

Bits assigned to a label are numbered from right to left. The least significant assigned bit on the far right is numbered 0. The next assigned bit to the left is numbered 1, and so on. Labels can contain bits that are not consecutive; however, bits are always numbered consecutively within a label.

Label Polarity

The pattern generator can display each label’s data in both positive and negative logic. The default polarity for all labels is positive. To toggle the polarity, select the label’s polarity field under the Format tab.

NOTE: Toggling the polarity of a label does not toggle the physical output signal. The

polarity of a label is a display orientation concept, useful only when entering data values.

Finding a label

Access the Find Label feature under Edit in the menu bar of all tabs. The Find Label feature locates specified labels, then displays them.

The search functionality is similar to a text based keyword search. After you enter the label name and select Next or Prev, the list of labels is rolled, exposing the label whose text characters, left to right, match the label name entered.

You can search for a complete label name as shown below in example 1, or enter just the base name and use the Next or Prev fields to roll through the list as in example 2.

Example 1

You have a list of labels named Data1 through Data15. Enter the complete name Data7 in the text entry field, then select Next. The

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

label named Data7 appears on the left-most side of the displayed labels.

Example 2

You have a list of labels named Data1 through Data15. Enter only the base name Data in the text entry field, then use the Next or Prev fields to roll the list of labels.

Replace Labels

The Replace Label command is available in the Sequence and Macro tabs.

NOTE: To highlight a line, drag from the bottom of the desired line to the top of the

desired line.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

1. Highlight the label to replace.

2. Select Replace.

3. From the Select Label dialog that appears, select one or more new labels to replace the existing label.

4. Select OK if you are done, or Apply if you have more labels to replace.

See Also “Searching for Labels” on page 90

Appending Labels

The Append Label command is located under Edit in the Sequence and Macro menu bar. The Append Label command adds labels to the right of the list of labels in Sequence and Macro.

1. In Sequence or Macro, select Edit, then select Append Label.

2. From the Select Label dialog that appears, select the new labels to append.

3. Select OK if you are done, or Apply if you have more labels to append.

See Also “Searching for Labels” on page 90

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Labels and Pods

Insert All Labels

The Insert All Labels command is located under Edit in the Sequence and Macro menu bar. Select this command to insert all valid labels under the Format tab into the sequence.

Delete All Labels

The Delete All Labels command is located under Edit in the Sequence and Macro menu bar. Select this command to delete all assigned labels in the sequence.

Setting the Label Font Size

Font settings are global. The font size you select is applied to all text in the display area.

1. From the menu bar select Options, then select Font.

2. Select a font size from the list.

Example of Font Sizes

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Working with Labels and Pods

Adjusting Column Width

1. Select the right edge of the label box.

2. Drag the box edge to the desired width.

Setting Column Color

NOTE: To highlight a line, drag from the bottom of the desired line to the top of the

desired line.

1. Select the Sequence or Macro tab.

2. Highlight a label, then select Change Color.

3. Select the desired color.

4. Select OK.

Setting Default Label Color

The Default Label Color command lets you set the label color for all new labels inserted into either Sequence or Macro.

1. Select the Sequence or Macro tab.

2. From the menu bar, select Options, then select Default Label Color.

3. From the Default Color dialog that appears, select the desired color.

4. Select OK.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Setting the Numeric Base

1. Select the label’s base field.

2. Select the desired base type.

Rearranging the Label Order

1. Select the desired label.

2. Drag the label to its new location.

Working with Labels and Pods

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Macro Parameters

Parameters are used to pass values into macros. A major benefit in passing parameters is that you keep a macro’s functionality generic and still direct specific action identified by parameters. Think of a parameter as the only part of a macro that changes as the macro is reused.

Use this procedure after creating your macro or recalling it in the Macro display:

1. From Macro, turn the desired parameters on. (see page 98)

2. Insert the parameters. (see page 99)

3. Assign values to the parameters. (see page 99)

NOTE: Macro parameters are passed as 32-bit values. If fewer than 32 bits are

assigned to a label in Format, the most significant bits of the parameter value are truncated when the parameter is used as data for the given label.

See Also “Building a User Macro” on page 25

“Recalling Macros” on page 114

“Removing Parameters from a Macro” on page 100

Turning Parameters On

You have 10 available parameters per macro. You cannot use parameters until you turn them on.

1. From Macro, select Parameters..., then select On.

2. Optional - If you want a custom parameter name, select anywhere in the name field and enter a name.

3. Select Close.

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Inserting Parameters into a Macro

Working with Macro Parameters

NOTE: Because parameters replace a data field within data vectors, you can only set

them on an existing data vector. They cannot be set on instruction vectors.

The following procedure is performed after your macro is created, recalled into the Macro display, and the parameter is turned on. (see page 98)

1. From Macro, select the data field you want to replace. This positions the cursor.

2. Select over any vector line and select Set Parameter.

3. From the Set Parameter dialog, select the parameter you want to set.

4. Select OK.

See Also “Working with Macro Parameters” on page 98

Assigning Parameter Values

Parameter values are easily set or changed from the tab in which the

Chapter 1: Using the Agilent Technologies 16720A Pattern Generator

Working with Macro Parameters

macro instruction was inserted. Assigned parameter values are displayed in parentheses next to their corresponding macro instruction. Parameter values are always displayed as hexadecimal values.

1. From the Sequence tab (or the Macro tab, if the macro is nested), select the macro instruction.

2. From the Set Parameters dialog that appears, enter in the new parameter values.

3. Select OK.

NOTE: Macro parameters are passed as 32-bit values. If fewer than 32 bits are

assigned to a label in Format, the most significant bits of the parameter value are truncated when the parameter is used as data for the given label.

Removing Parameters from a Macro

1. From Macro, select the data field that contains the parameter to be removed.

2. Highlight over any vector line and select Clear Parameter.

100

Agilent 16720A Help Volume

Specifications and Main Features

Frequently Asked Questions

User Manual

Using the Agilent Technologies 16720A Pattern Generator

Contents

Using the Agilent Technologies 16720A Pattern Generator

Overview of the Agilent Technologies 16720A Pattern Generator

Mapping Probe Pods to the Interface

Vector Output Mode

Clock Source

Building a Sequence of Test Vectors

Running the Pattern Generator

What Happens when Run is Selected

What Happens when Stop is Selected

Configure Format

Configure Sequence

Set up the Workspace

View the Results

Building an Initialization Sequence

Building a Main Sequence

Building a User Macro

Importing Agilent 16522A ASCII Files

Creating an ASCII File

ASCII Disk File Identifier

ASCII File Commands

ASCDown Command

LABel Command

VECTor Command

FORMat:MODe Command

FORMat:CLOCk Command

FORMat:DELay Command

Importing Agilent 16720A PattGen Binary Files

Creating a PattGen Binary File

PattGen Binary File Identifier

Binary File Commands

CLOCK Command

DELAY Command

MODE Command

RMODE Command

LABEL Command

Keywords

ORDER Command

WIDTH Command

DEPTH Command

BREAK Command

EVENT Command

WAIT Command

SIGNAL Command

MAIN Command

BEGIN Command

Binary Data

Importing System Data Files

Data Sets

Data Set Labels

Data Set Range

Loading and Saving Pattern Generator Configurations

Selecting the Correct Probe Pod

Data Pod Descriptions

Clock Pod Descriptions

Connecting the Probe Pods

Editing Sequences

Cutting, Copying, Pasting, and Deleting Sequence Lines

Deleting Sequence Lines

Inserting Blank Sequence Lines

Go to a Line Number

Positioning the Sequence

Using Ditto " values

Working with Instruction Types

The Break Instruction

The Signal IMB Instruction

The Wait IMB Event Instruction

The Wait External Event Instruction

The User Macro Instruction

The Repeat Loop Instruction

Working with Labels and Pods

Creating and Inserting New Labels

Deleting Labels

Inserting Pre-assigned Labels

Renaming Existing Labels