Agilent 8719D Programming Guide

Page 1

Notice

Hewlett-Packard to Agilent Technologies Transition

This documentation supports a product that previously shipped under the HewlettPackard company brand name. The brand name has now been changed to Agilent Technologies. The two products are functionally identical, only our name has changed. The document still includes references to Hewlett-Packard products, some of which have been transitioned to Agilent Technologies.

Printed in USA March 2000

Page 2

Programmer’s Guide

Analyzer

08720-90293 Supersedes October

Page 3

Notice.

The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including

but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shah not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Company 1996, 1997, 1998, 1999

Page 4

Assistance

Product maintenance

products.

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Great Britain Hewlett-Packard Ltd.

Winnemh Triangle

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and other

ang assistance,

nearest

and Service Offices

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. . .

Page 5

How to Use This Guide

The Example Programs Disks

The example programs shipped with this instrument were originally written for the HP 8753D Network Analyzer, but are compatible with the HP to maintain compatibility with the HP

it will be necessary to modify certain example programs . The example programs that need modification are clearly identifled in Chapter 2, “HP BASE Programming Examples.”

Network Analyzer. ln order

The following is included with the “Programming Examples HP

disk:

HP BASE example programs (compatible with Rocky Mountain Basic)

utility,

The following is included with the “Programming Examples QuickC and QuickBASW disk:

QuickC example programs

example programs

Programming Documentation

This Programmer’s Guide consists of the following two chapters:

network analyzer under

example programs (which offer solutions for several remotely-controlled analyzer processes).

The programming examples have only been documented for HP BASE in Chapter 2. However, if the programming language QuickC or programming examples can be used or Programming Examples” as an overall guide in determining the organization and logic of the

Programming and Command Reference provides a reference for operation of the

BASIC Programming

control and provides a description of all

provides documentation for the factory-tested HP

mnemonica

is preferred, these versions of the

while referring to Chapter 2, “HP BASE

Conventions

Front-Panel Ke

Screen Text

This represents a key physically located on the instrument. This represents a “softkey,” a key whose label is determined by the

instrument’s This represents text displayed on the instrument’s screen.

Page 6

Network Analyzer Documentation Set

The Installation and Quick Start Guide

familiarizes you with the network analyzer’s front and rear panels, electrical and

environmental operating requirements, as well as procedures for installing, configuring, and verifying the operation of the analyzer.

The User’s Guide

shows how to make measurements, explains commonly-used features, and tells you how to get the most performance from your analyzer.

The Quick Reference Guide

provides a

summary of selected user features

The

Guide

provides

er’s

programming information including an HP-IB programming and command reference as well

as programming examples

The Service Guide

provides the information needed to adjust, troubleshoot, repair, and verify conformance to published specifications

Page 7

Contents

HP-IB

Where to Look for More Information Preset State Analyzer Command Syntax

Code Naming Convention

Characters units Command Formats

General Structure: Syntax Types

HP-IB Operation

Device Types

Listener Controller

HP-IB Bus Structure

Handshake Lines Control Lines

HP-IB Operational Capabilities

HP-IB Status Indicators

Bus Device Modes

System-Controller Mode

Pass-Control Mode

Analyzer Bus Modes

Setting HP-IB Addresses

Response to HP-IB

Abort

Device Clear.

Local..

Local Lockout Pass Control

Remote Trigger

Operation Complete

Reading Analyzer Data

Output Queue Command Query Identification Output syntax Marker data

.................................

...................................

..................................

.................................

Requirements

..................................

.................................

Operation

and

..........................

.........................

..............................

.............................

............................

..............................

...............................

................................

............................

..............................

............................

..............................

............................

.........................

.............................

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Mode

..............................

................................

..............................

...............................

................................

...............................

................................

...........................

............................

...........................

..........................

.............................

............................

..............................

d Reference

.....................

.......................

Universal Commands)

......

1-11

1-12 1-12 1-12 1-12 1-13 1-14 1-15 1-15 1-16 1-16 1-16 1-16

1-17 1-17 1-17 1-17

1-17

1-18

1-18 1-18 1-18

1-18

1-19

1-21

Contents-l

Page 8

Array-Data Formats Trace-Data Transfers Stimulus-Related Values

Data-Processing Chain

................................

Fast Data Transfer Commands Data Levels

Learn String and Calibration-Kit String

Error Reporting

Status Reporting The Status Byte The Event-Status Register and Event-Status Register B Error Output

Calibration

Disk

Using Key Codes. Key Select Codes for the Network Analyzer HP-IB Alphabetical Mnemonic Listing

................................

.................................

Names

Commands

............................

..........................

............................

.......................

...................

...............................

..............................

............

...............................

..............................

.............................

..................

............................

........................

1-25

BASIC Programm

Introduction

Required Equipment

Optional Equipment

System Setup and HP

Command Structure in BASIC

Command Query

Operation Complete

Running the Program

Preparing for Remote (HP-IB) Control Measurement Process

Step 2. Calibrating the Step 3. Connecting the Device under ‘I&t Step 4.

Step 5. Post-Processing the Measurement Data

Step 6. Transferring the Measurement Data

BASIC Programming Examples

Program Information.

Analyzer Features Helpful in Developing Programming Routines

Analyzer-Debug Mode

Example 1: Measurement Setup

Example

Running the Program

Example

Running the Program

Example 2: Measurement Calibration

Calibration Kits Example

Running the Program

Example

.................................

the Program

.................................

the Measurement Data

Setting Parameters

Verifying Parameters

Examples

............................

...........................

Verification

Network Analyzer Instrument Control Using BASIC

.......................

..............................

..........................

............................

..........................

............................

Setup

........................

...........................

..........................

Sweep

..............................

l-Port Calibration

.........................

.......................

..........................

Measurement Calibration

....................

.....................

..................

....................

...............

.................

......................

.....................

..............

.....

.......

2-2 2-2 2-2 2-5 2-5 2-6 2-7 2-8 2-8

2-8 2-10 2-11 2-11 2-11 2-12 2-12 2-12 2-12

2-13 2-14 2-14 2-14

2-14 2-15 2-15 2-16 2-18

2-19 2-20

2-20

2-21

2-23 2-23

Page 9

Running the Program

Example

Adapter Removal Calibration

the Program

Example

Using Raw Data to Create a Calibration (Simmcal)

Running the Program

Example

..........................

.................

..........................

........

..........................

Error Correction Processed on an External PC

Overview................................

Using the Programming Example

Running the Program

Example 3: Measurement Data Transfer

Trace-Data Formats and Transfers Example 3A: Data Transfer Using Markers

Running the Program

Example

Running the Program

Example

Running the Program

Example

Running the Program

Example

Running the Program

Example 4: Measurement Process Synchronization

Status Reporting

Mode

..........................

...................

.....................

.................

..........................

Data Transfer Using FORM 4 (ASCII Transfer)

..........

..........................

Data Transfer Using Floating-Point Numbers

..........

..........................

Data Transfer Using Frequency-Array Information

.......

..........................

Data Transfer Using FORM 1, Internal-Binary Format

..........................

...............

..............................

......

....................

the Program

Example

Generating Interrupts

the Program

Example

Power Meter Calibration

Running the Program

Example 5: Network Analyzer System Setups

Saving and Recalling Instrument States

..........................

.....................

..........................

....................

..........................

.................

...................

....................

Running the Program

Example

Reading Calibration Data

Running the Program

Example

Saving and Restoring the Analyzer Instrument State

Running the Program

Example 6: Limit-Line lbsting

Using List-Frequency Mode Example

Setting Up a List-Frequency Sweep

Running the Program

Example

Selecting a Single Segment from a

Running the Program

..........................

...................

..........................

.......

..........................

........................

.........................

..............

..........................

of Segments

......

..........................

................

....................

Running the Program

Example

Performing

Running the Program

Example 7: Report Generation

Example

Operation Using

Running the Program

Example

Controlling Peripherals Using Pass-Control Mode

Running the Program

Example

Printing with the Serial Port

..........................

While

...........

..........................

........................

Mode

............

..........................

........

..........................

.................

.....

2-26 2-27 2-28 2-29 2-34 2-36 2-36 2-36 2-37

2-42 2-43 2-43 244 2-45 2-46 248 2-49 2-50 2-51 2-53 2-54 2-55 2-56 2-56 2-57 2-58 2-59 2-61 2-62 2-65 2-66 2-66 2-66 2-67

2-68 2-70 2-71 2-73 2-74 2-74 2-74 2-76

2-77

2-79 2-79 2-80 2-82

2-83

2-85 2-86 2-86 2-87 2-88 2-90

2-91

Page 10

Running the Program

Example

Running the Program Utilizing PC-Graphics Applications Using the Plot File Example

Running the Program

Example 8: Mixer Measurements

Example

Running the Program

Limit Line and Data Point Special Functions

Overview..

Limit Segments Output Results.

Constants Used Throughout This Document

Output

Example Program of OUTPSEGAF Using BASIC

Output Minimum and Maximum Point For

Example Program of OUTPSEGAM Using BASIC

Output Data Per Point

Plotting to a

Reading ASCII Disk Files to the Instrument Controller’s Disk File

Comparison of Two Mixers

...............................

Display of Limit Lines

.............................

Status for

..........................

and Transferring

..........................

.......................

Group Delay, Amplitude or Phase

..........................

..................

......................

.................

Segments

...........................

......................

..................

Segments

.....................

Data to a Plotter

............

.............

..............

...........

..............

.....

2-92

2-93

2-94 2-95 2-96

2-99 2-100 2-100 2-103

2-104

2-105

2-107

2-108 2-109

2-110 2-111 2-112

2-112

2-114 2-115

2-116

2-117

2-118

2-119

Index

Page 11

Figures

l-l. HP-IB Bus Structure

Bus Concept FORM 4 (ASCII) Data-Transfer Character String The Data-Processing Chain Status Reporting Structure

Key Codes.

The HP

2-2. Status Reporting Structure 2-3. Connections: Comparison of Two Mixers

O-l. Hewlett-Packard l-l. Preset Conditions (1 of 5)

Code Naming Convention OPC-compatible Commands

14. HP

Status Bit Defmitions (Continued) Relationship between Calibrations and Classes Error Coefficient Arrays Disk File Names

1-12.

Additional BASIC 6.2 Programming Information

2-2. Additional HP-IB Information 2-3. Measurement Speed: Data Output and Error Correction to an External PC* . . 2-4. HP 2-5. Limit Line and Data Point Special Functions Commands 2-6. Limit Segment 2-7. Example Output: OUTPSEGAM 2-8.

2-9. 2-10. Example Output: OUTPSEGAF 2-11. Example Output: OUTPSEGM 2-12. Example Output: OUTPSEGAM 2-13. Example Output: OUTPDATP (data per point) 2-14. Example Output: OUTPDATPR (data per range of points)

................................

Commands

............................

........................

...............

.........................

Network Analyzer System with Controller

.........................

Group Delay, Amplitude or Phase .

.....................

and Service Offices

.........................

Network Analyzer Array-Data Formats

...........................

......................

..........................

..............................

.............................

...........................

........................

Network Analyzer Array-Data Formats

for Figure 2-3

Status Constants

..........................

..................

...................

..........

................

...............

..........

...........

.....................

of all segments)

.....................

for

per segment)

segments)

for

segments)

................

..........

............

..........

...........

......

1-12 1-15 1-21

2-3

2-56

2-107

. . .

1-19

1-31

2-37

246 2-105 2-108

2-110 2-110 2-112 2-114 2-115

2-117 2-118

Page 12

HP-IB Progr

and Command Reference

This chapter is a reference for operation of the network analyzer under HP-IB control. You should already be familiar with making measurements with the analyzer. Information about the HP-IB commands is organized as follows:

Analyzer Command Syntax

Code Naming Convention

Valid Characters

units

Command Formats

HP-IB Operation

Device Types

HP-IB Bus Structure

Requirements

HP-IB Operational Capabilities

Bus Device Modes

Setting HP-IB Addresses

Response to HP-IB

Analyzer Operation-Complete Commands

Reading Analyzer Data

Output Queue

Command Query

Output syntax

Marker Data

Array-Data Formats

Trace-Data Transfers

Stimulus-Related Values

Data Processing Chain

Data Arrays

Universal Commands)

Fast Data Transfer Commands

Data Levels

Learn String and Calibration Kit String

Page 13

Error Reporting

Status Reporting

The Status Byte

The Event-Status Register and Event-Status Register B

Error Output

Calibration

Disk File Names

Using Key Codes

Key Select Codes Arranged by Front-Panel

Only Commands

Alphabetical Mnemonic Listing

For information about manual operation of the analyzer, refer to the HP

Network Analyzer User’s

Where to Look for More Information

Additional information covering many of the topics discussed in this chapter is located in the following:

Tutorial &script&m. of the

discussion of all aspects of the HP-IB. A thorough overview of tutorial HP publication, HP part number 5021-1927.

for Programmable

of Electrical and Electronics Engineers, Inc, 345 East New York 10017.

Chapter 2, “HP BASIC programming examples,” includes programming examples in

HP BASIC.

presents a description and

technical details as a broad

Street, New York,

Programming and Command Reference

Page 14

Preset State

When the state. This state is defined in

When line power is cycled, or the

key is pressed, the analyzer reverts to a known state called the factory preset

l-l.

key pressed, the analyzer performs a self-test routine.

Upon successful completion of that routine, the instrument state is set to the conditions shown

l-l. The same conditions are true following a “PRES;” or “RST;” command over HP-IB,

although the self-test routines are not executed.

You

can configure an instrument state and

it as your user preset state:

1. Set the instrument state to your desired preset conditions.

2. Save the state (save/recall menu).

3. Rename that register to “UPRESET”.

The recalled each time you press

factory preset instrument state by pressing

Note

. . . . .

. . . .

key is now toggled to the

When you send a preset over HP-IB, you will always get the factory preset.

selection and your defined instrument state will be

and when you turn power on. You can toggle back to the

and selecting .:~~~~~~.

You can, however, activate the user-delined preset over HP-IB by recalling the

HP-IB Programming and Command Reference

Page 15

l-l. Preset Conditions (1 of 5)

Preset Conditions Analyzer Mode Analyzer Mode Frequency Offset

(Opt. 089)

Offset Value

High Power

External R Channel Attenuator A Attenuator B

Step Sweep Step Sweep (Opt.

Display Mode

Sweep Time Start Frequency

(HP Stop Frequency

Frequency

[HP

CW Frequency 1GHz

Port Power

(HP Test Port Power

[HP

(HP

Port Power

(HP Start Power

[HP

085)

Opt. 007)

400)

Network Analyzer Mode

Off

Linear Frequency

Off

100 ms, Auto Mode

13.51 GHz

20.05

40.05 GHz

-10

-15.0

Preset

Start Power (HP

Start Power (BP

Start Power (HP

Power Span (HP

Power (HP

Coupled Power

Source Power Coupled Channels Coupled Port Power Power Range Power Range

Number of Points

Frequency List Edit Mode

Parameter

Conversion Format

Color Selections

Active Channel

Opt. 007)

Opt. 400)

Opt. 007)

Opt. 400)

Channel 3: 512;

Log Magnitude

Same Off Channel 1

Preset

-10.0

-20.0

-15.0

-25.0

20 dB

On On On On Auto; Range 0 Auto; Range 1

201

Number of

Channel 2:

Data

before

Page 16

12-3. Preset Conditions (2 of 5)

Preset Conditions

Blank Disabled

Retrace Power Standard

Set Switch Continuous Set Switch (Opt. 007

or 085) Intensity

Beeper: Done Beeper: Wamiug Off

Title

IF Bandwidth IF Averaging Factor Smoothing Aperture Phase offset Electrical Scale/Division

Correction Calibration Type

Kit

(HP Calibration Kit

(HP System ZO

Factor

Port 1 Port 2 Input A Input B

Power Meter Calibration

Hold

Factory selected value is not changed by

Off Channel 1 = Channel 2 = Empty 3000 Hz 16; off 1% 0 Degrees

Off None

3.5 mm

2.4 mm

50 ohms

Off

on Off

Value

Preset Conditions

Power Loss Correction

Sensor A/B

InterpoIated Error

Correction

Markers (coupled) Markers 1, 2, 3, 4, 5 Last Active Marker Reference Marker Marker Mode Display Markers Delta Marker Mode

Marker Search Marker Marker Width Marker Tracking Marker Marker Marker Marker Statistics

Marker

Smith Marker

Limit Lines

Limit

Edit Mode

Amplitude Offset

Beep Fail

Value

Offset

Offset (Phase)

oKset

Preset Off A

AII Markers Off

None Continuous

Off

Degrees

R+jX Mkr

Upper/Lower

describes how to set the factory preset state of

Error Correction can be on or

when the

is in the factory preset state. The User’s Guide

Error Correction.

Programming and Command Reference

Page 17

12-3. Preset Conditions (3 of 5)

Preset Viahe

Time Domain Transform

Type

Transform

-1

stop Transform

Gate

Normal

picosecond8

Gate Stop

Demodulation window

Normal

Use Memory

HP-IB

LastActiveBtate

HP-IB Mode

Last Active

Clock Time Stamp

Preset:

Parallel Port La8tActiveBtat.e

Plotter Port Plotter Baud Rate

LastActiveBtate

Handshake LmtActiveBtate

HP-IB

LastActiveBtate Port Baud Rate

LastActiveBtate

Disk Save

Data Array Raw Data Array Formatted Data Array Graphics

Select Disk Disk Fbrmat

Loop

service HP-IB

Phase Lock

Input Resolution

Plot

?lot Data ‘lot Memory ‘lot Graticule ‘lot

Marker

‘lot kale ‘lot.

Preset

Off Off

Off

Memory

11 (Aux Input)

1 The directory size

preset turns off sequencing modify (edit) mode and

calculated es 0.013% of the floppy disk

(which

or 0.006% of the hard disk size.

any running sequence.

Page 18

12-3. Preset Conditions (4 of 5)

Preset

Pen Number:

Marker

Data

Memory

Graticule

Marker

Type:

Data

Memory

7 3 6

7 7

7 7 7 7

Preset Value

Preset

Printer Mode Auto-Feed

Printer

Data Mem Data

Graticule

F&f Line

Preset

Last Active State

Blue

Slack

12-3. Preset Conditions (5 of 5)

Format

10.0

Phase (degree) Group Delay

Smith Chart Polar Linear Magnitude

90.0

10.0

1.00

0.1

0.2

1.00

Reference

5.0

0.0

5.0

0.0

1.0

0.0

1.0

1-7

Page 19

Analyzer Command Syntax

Code Naming Convention

The analyzer HP-IB commands are derived from their front-panel key titles (where possible), according to this naming convention:

Simple commands are the command name for power. If the function label contains two words, the

letters are the

three letters of the

four letters of the function they control, as in POWE, the

three mnemonic

word, and the fourth mnemonic letter is the

letter of the second word. For example, ELED is derived from electrical delay. If there are many commands grouped together in a category, as in markers or plotting pen

numbers, the command is increased to 8 letters. The

4 letters are the category label and the last 4 letters are the function specifier. As an example, category pen numbers are represented by the command PENN, which is used in combination with several functions such as PENNDATA, PENNMEMO.

The code naming guidelines, listed in lhble

make commands more meaningful and easier to remember

maintain compatibility with other products (including the HP 8510)

Note

There are times when these guidelines are not followed due to technical

are used in order to:

considerations.

Convention

1-2.

Key Power Start

Naming Convention

For HP-IB Code Use

First Four Letters

Example

Words

Two Words in a Group

Three Words

Electrical Delay

Search Right

Marker Gate--span

Pen Num Data

Three Letters of First Word,

of Second Word

Four

First Three Letters of First Word,

of Second Word, First Four Letters of Third Word

Letter ELED

Letter

Some codes require appendages (ON, OFF, 1, 2, etc). Codes that do not have a front-panel equivalent are HP-IB only commands They use a similar convention based on the common name of the function.

HP-IB Programming and Command Reference

Page 20

Valid Characters

The analyzer accepts the following ASCII characters:

letters

numbers

decimal points

semicolons (;)

quotation marks

carriage returns (CR)

Both upper- and lower-case letters are acceptable. Carriage returns, leading zeros, spaces, and unnecessary terminators are ignored, except for those within a command or appendage. If the analyzer does not recognize a character as appropriate, it generates a syntax error message and recovers at the next terminator.

The analyzer can input and output data in basic units such as Hz,

Seconds

Volts

Hz DB

Hertz

Input data is assumed to be in basic units (see above) unless one of the following

seconds,

is used

(upper and lower case are equivalent):

MS Milliseconds US Microseconds NS Nanoseconds PS

KHZ Kilohertz

MHZ Megahertz

GHZ Gigahertz

Femtoseconds

Command Formats

The The analyzer does not

commands accepted by the analyzer can be grouped into five input-syntax types

between upper- and lower-case letters

General Structure:

The general syntax structure is:

[code] [appendage] [data]

The individual sections of the syntax code are explained below.

[terminator]

[code]

The root mnemonic (these codes are described in the ‘Alphabetical Mnemonic Listing” later in this chapter.)

A OFF (toggle a function ON or OFF), or integers, which specify one capability out of several. There can be no spaces or symbols between the code and the appendage.

attached to the root mnemonic Possible appendages are ON or

Page 21

A single operand used by the root mnemonic, usually to set the value of a function. The data can be a number or a character string. Numbers are accepted as integers or example, STAR 0.2E+lO ; sets the start frequency to 2 must be enclosed by double quotation marks

For example:

A title string using where the first two

third The units of the operand, if applicable. If no units are specified, the analyxer

function when either units or a terminator are received.

properly.

the basic units as described above. The data is entered into the

BASIC would look like:

are an escape so that RMB BASIC will interpret the

with power of ten

by E (for

Character strings

[terminator]

The

SYNTAX

These are simple action commands that require no complementary information, such as AUTO ; (autoscales the active channel).

SYNTAX TYPE 2:

are simple action commands requiring limited

There can be no characters or symbols between the code and the appendage.

Note

Indicates the end of the command, enters the data, and switches the active-entry area OFF. A semicolon

are not necessary for the analyzer to interpret commands correctly, but in the case of a syntax error, the analyxer at the next terminator. The analyxer also interprets line feeds and OR IDENTIFY

syntax types are:

1: [code] [terminator]

(error correction ON or OFF) or

In the

[D] must be 2 characters For example,

; will generate a syntax error.

messages as terminators

cases:

is the recommended terminator.

attempt to recover

such as

RECAREG[D],

(recall register 1, 2, 3).

will execute, while

and EG[D],

and

END

SYNTAX

These are data-input commands such as STAR 1.0 GHZ

SYNTAX TYPE 4: [code] [appendage] [data] [terminator]

These are titling and marker commands that have an appendage, such as TITRi (title register 1

QUERY

query a front-panel-equivalent mnemonic (For example, appendages, place the question mark after the appendage.

3: [code] [data]

[code][?]

(set the start frequency to 1

(title register 2

append a question mark (?) to the root

or REAL?.)

query commands with integer

Page 22

HP-IB Operation

The Hewlett-Packard Interface Bus (HP-IB) is Hewlett-Packard’s hardware, software, documentation, and support for IEEE 488.2 and instruments. This interface allows you to operate the analyzer and peripherals in two methods:

by an external system controller

by the network analyzer in system-controller mode

Device Types

The HP-IB employs a party-line bus structure in which up to 15 devices can be connected on one contiguous bus. The interface consists of 16 signal lines and 8 ground lines within a shielded cable. With this cabling system, many different types of devices including instruments, computers, power meters, plotters, printers, and disk drives can be connected in

worldwide standards for interfacing

Every

device must be capable of performing one or more of the following interface

functions:

is a device capable of transmitting device-dependent data when addressed to talk.

There can be only one active talker at any given time. Examples of this type of device include:

power meters

disk drives

voltmeters

counters

tape readers

The network analyzer is a

when it sends trace data or marker information over the bus.

Listener

A listener is a device capable of receiving device-dependent data over the interface when addressed to listen. There can be as many as 14 listeners connected to the interface at any given time. Examples of this type of device include:

printers

power supplies

signal generators

The network

is a listener when it is controlled over the bus by a system controller.

Controller

A controller is

1. managing the operation of the bus

addressing talkers and listeners

There can be only one active controller on the interface at any time. Examples of controllers include desktop computers, minicomputers, workstations, and the network analyzer. In a

only be one master and can regain active control at any time. The analyzer is an active controller when it plots, prints, or stores to an system controller when it is operating in the system-controller mode.

as a device capable of:

system, active control can be passed between controllers, but there can

controller connected to the interface. The system controller acts as the

disk drive in the pass-control mode. The analyzer is also a

HP-IB Programming and Command Reference

Page 23

HP-IB Bus Structure

Figure l-l.

Bus Structure

Data Bus

The data bus consists of 8 bi-directional lines that are used to transfer data from one device to another. Programming commands and data transmitted on these lines are typically encoded in ASCII, although binary encoding is often used to speed up the transfer of large arrays Both ASCII- and binary-data formats are available to the analyzer. In addition, every byte transferred over HP-IB undergoes a handshake to insure valid data.

A three-line handshake scheme coordinates the transfer of data between talkers and listeners. To insure data integrity in multiple-listener transfers, this technique forces data transfers to occur at the transfer rate of the slowest device connected to the interface. With most computing controllers and instruments, the handshake is performed automatically, making it transparent to the programmer.

Control Lines

The data bus

has five control lines. The controller uses these lines to address devices and

to send bus commands. IFC (Interface Clear)

This line is used exclusively by the system controller. When this line is true (low), all devices (whether addressed or not) unaddress and revert to an idle state.

and Command Reference

Page 24

ATN (Attention)

The active controller uses this line to

the information on the data bus is command-oriented or

data-oriented. When this line is true (low), the bus is in the

command mode, and the data lines carry bus commands. When this line is false (high), the bus is in the data mode, and the data

whether

carry device-dependent instructions or data.

SRQ (Service Request)

REN (Remote Enable)

EOI (End or Identify)

This and the active controller services the requesting device. The network analyzer can be enabled to pull the SRQ line for a variety of reasons such as requesting control of the interface, for the purposes of printing, plotting, or accessing a disk.

This line is used exclusively by the system controller. When this line is set true (low), the bus is in the remote mode, and devices are addressed by the controller to either listen or talk. When the bus is in remote mode and a device is addressed, it receives instructions from the system controller via HP-IB rather than from its front panel (pressing front-panel operation). When this line is set false (high), the

bus and all of the connected devices return to local operation. This line is used by a talker to indicate the last data byte in a

multiple-byte tr a parallel-poll sequence. The analyzer recognizes the EOI line as a terminator, and it pulls the EOI line with the last byte of a message output (data, markers, plots, prints, error messages). The analyzer does not respond to parallel poll.

is set true (low) when a device requests service

HP-IB Requirements

Number of Interconnected Devices:

15 maximum.

returns the device to

or by an active controller to initiate

Interconnection Path

Message Transfer Scheme:

Data Rate:

Address Capability:

Multiple-Controller Capability:

Cable Length:

20 meters maximum or 2 meters per device

(whichever is less). Byte serial, bit parallel asynchronous data

transfer using a Maximum of 1 megabyte-per-second over the

data rate depends on the transfer rate of the slowest device connected to the bus

Primary addresses: 31 connected to the interface at given time.

In systems with more than one controller (such as this instrument), only one controller can be active at any given time. The active controller can pass control to another controller, but only the system controller can assume unconditional control. Only one

handshake system.

distances with tri-state drivers Actual

31 listen. A

of 1 talker and 14 listeners can be

controller is allowed.

Page 25

HP-IB Operational Capabilities

On the network analyzer’s rear panel, next to the HP-IB connector, there is a list of HP-IB device subsets as capabilities:

Pull-source handshake. Pull-acceptor handshake. Basic talker, answers serial poll, unaddresses if MLA is issued. No talk-only mode. Basic listener, unaddresses if MTA is issued. No listen-only mode. Complete service request (SRQ) capabilities. Complete remote/local capability including local lockout. Does not respond to parallel poll. Complete device clear Responds to a Group Execute Trigger (GET) in the hold-trigger mode. System controller capabilities in system-controller mode. Pass control capabilities in pass-control mode.

by the IEEE 488.2 standard. The analyzer has the following

drivers LEO TEO

No extended listener capabilities. No extended talker capabilities

These codes are completely explained in the IEEE Std 488 documents, published by the Institute of Electrical and Electronic Engineers, Inc, 345 East

Street, New York,

New York 11017.

1-14 HP-IB Programming and Command Reference

Page 26

BP-IB Status Indicators

When the analyzer is connected to other instruments over the HP-IB, the HP-IB status indicators illuminate to display the current status of the analyzer. The HP-IB status indicators are located in the instrument-state function block on the front panel of the network analyzer.

R = Remote Operation L = Listen mode T = Talk mode S = Service request (SRQ) asserted by the analyzer

Bus Device Modes

The analyzer uses a single-bus architecture. The single bus allows both the analyzer and the host controller to have complete access to the peripherals in the system.

Three different controller modes are possible in and

system-controller mode

talker/listener mode

system:

pass-control mode

GRAPHICS PLOTTER

PRINTER

HOST CONTROLLER

Figure

NETWORK ANALYZER

Analyzer Single Bus Concept

HPJB Programming and Command Reference

Page 27

System-Controller Mode

This mode allows the analyzer to control peripherals directly in a stand-alone environment (without an external controller). This mode can only be selected manually from the

analyzer’s front panel. It can only be used if no active computer or instrument controller is connected to the system via HP-IB. If an attempt is made to set the network analyzer to the system-controller mode when another controller is connected to the interface, the following

message is displayed on the analyzer’s display screen:

"ANOTHER SYSTEM CONTROLLER ON HP-IB BUS"

The analyzer must be set to the system-controller mode in order to access peripherals from the front panel. In this mode, the analyzer can directly control peripherals (plotters, printers, disk drives, power meters, etc) and the analyzer may plot, print, store on disk or perform power meter functions

Note

Do not attempt to use this mode for programming. HP recommends using an external instrument controller when programming. See the following section,

Mode.

This is the mode that is normally used for remote programming of the analyzer. In talker/listener mode, the analyzer and all peripheral devices are controlled from an external instrument controller. The controller can command the analyzer to talk and other devices to listen. The analyzer and peripheral devices cannot talk directly to

each

other unless the computer sets up a data path between them. This mode allows the analyzer to act as either a talker or a listener, as required by the controlling computer for the particular operation in progress.

Pass-Control Mode

This mode

the computer to control the analyzer via

(as with the talker/listener mode), but also allows the analyzer to take control of the interface in order to plot, print, or access a disk. During an analyzer controlled peripheral operation, the host computer is free to perform other internal tasks (i.e. data or display manipulation) while the analyzer is controlling the bus After the analyzer-controlled task is completed, the analyzer returns control to the

system

Note

controller.

Performing an

instrument

preset does not affect the selected bus mode, although the bus mode will return to talker/listener mode if the line power is cycled.

Note

“Specifications and Measurement Uncertainties” in the

User’s

provides information on setting the correct bus

mode from the front-panel menu.

Analyzer Bus Modes

As discussed earlier, under control, the analyzer can operate in one of three modes: talker/listener, pass-control, or system-controller mode.

In mode, the analyzer can make a plot or print using the

mode, the analyzer behaves as a simple device on the bus. While in this

; commands The analyzer will wait until it is addresses to talk by the system controller and then dump the display to a plotter/printer that the system controller has addressed to listen. Use of the commands

PLOT and

PRINALL

require control to be passed to another controller.

Page 28

In pass-control mode, the analyzer can request control from the system controller and take control of the bus if the controller addresses it to take control. This allows the analyzer to

take control of printers, plotters, and disk drives on an as-needed basis. The analyzer sets

event-status register bit 1 when it needs control of the interface, and the analyzer will transfer control back to the system controller at the completion of the operation. It will pass control

back to its controller address, specified by ADDRCONT. The analyzer can also operate in the system-controller mode. This mode is only used when

there is no remote controller on the bus. In this mode, the analyzer takes control of the bus, and uses it whenever it needs to access a peripheral. While the analyzer is in this mode, no other devices on the bus can attempt to take control. Specifically, the REN, must remain unasserted, and the data lines must be freed by

but the addressed

and IFC lines

Setting HP-IB Addresses

In systems interfaced using HP-IB, each instrument on the bus is address This address code must be different for each instrument on the bus. These addresses

are stored in short-term, non-volatile memory and are not affected when you press

cycle the power.

Note

The analyzer addresses are set by pressing the addresses must be set for the plotter, printer, disk drive, and power meter.

The default address for the analyzer is device 16, and the display address is device 17.

Note

Response to HP-IB Meta-Messages

The analyzer occupies two HP-IB addresses: the instrument itself and the display. The display address is derived from the instrument address by complementing the instrument’s least-significant bit. Hence, if the instrument is at an even address, the display occupies the next higher address. If the instrument is at an odd address, the display occupies the next lower address

. . . . . . . . . . . . . . . .

. .

There is also an address for the system controller. This address refers to the

controller when the network analyzer is being used in pass-control mode. This

is the address that control is passed back to when the analyzer-controlled

operation is complete.

In system-controller mode,

Universal Co

by an

Abort

The analyzer responds to the abort message (IFC) by halting all listener, talker, and controller functions

Device Clear

The analyzer responds to the device clear commands (DCL, SDC) by clearing the input and output queues, and clearing any HP-IB errors. The status registers and the error queue are unaffected.

The analyzer will go into local mode if the unasserted, or the front-panel local key is pressed. Changing the analyzer’s HP-IB status from remote to local does not affect any of the front-panel functions or values.

command (GTL) is received, the remote line is

HP-IB Programming and Command Reference

Page 29

Local Lockout

If the analyzer receives the local-lockout command

while it is in remote mode, it will disable the entire front panel except for the line power switch. A local-lockout condition can only be cleared by releasing the remote line, although the local command (GTL) will place the instrument temporarily in local mode.

Parallel Poll

The analyzer does not respond to parallel-poll conhgure (PPC) or parallel-poll messages.

If the analyzer is in pass-control mode, is addressed to talk, and receives the take-control

command

from the system control it will take active control of the bus. If the analyzer

is not requesting control, it will immediately pass control to the system controller’s address.

Otherwise, the analyzer will execute the function for which it sought control of the bus and then pass control back to the system controller.

Remote

The analyzer will go into remote mode when the remote line is asserted and the analyzer is addressed to listen. While the analyzer is held in remote mode, exception of

are disabled. Changing the analyzer’s HP-IB status from remote

front-panel keys (with the

local

does not affect any front-panel settings or values.

Serial Poll

The analyzer will respond to a serial poll with its status byte, as Reporting” section of this chapter. talk and issue a

enable command (SPE). Upon receiving this command, the analyzer

initiate the serial-poll sequence, address the analyzer to

in the “Status

will return its status byte. End the sequence by issuing a serial-poll disable command (SPD). A serial poll does not affect the value of the status byte, and it does not set the instrument to remote mode.

In hold mode, the analyzer responds to device trigger by taking a single sweep. The analyzer responds only to selected-device trigger

This means that it will not respond to group execute-trigger (GET) unless it is addressed to listen. The analyzer will not respond to GET if it is not in hold mode.

Page 30

Analyzer Operation

Operation Complete

Occasionally, there is a need to know when certain analyzer operations have been completed. There is an operation-complete function (OPC) that the execution of certain key commands This mechanism is activated by issuing OPC ; or OPC? ; prior to an OPC-compatible command. The status byte or ESR operation-complete bit

be set after the execution of the OPC-compatible command. For example, issuing OPC

causes the OPC bit to be set when the the OPC

The analyzer

causes the analyzer to output a one (1) when the command execution is complete.

the computer by not transmitting the one (1)

sweep is

completed. For example, executing OPC? ; , and then immediately querying the analyzer causes the bus to

the instrument preset is complete and the analyzer outputs a one

As another example, consider the timing of sweep completion. Send the command string SWET

S; OPC?

then waits for completion of a

SING; to the analyzer. This string sets the analyzer sweep time to 3 seconds, and

sweep to respond with a one (1). The computer should be programmed to read the number one (1) response from the analyzer indicating completion of the

sweep. At this point a

trace exists and the trace data could be read into the

computer.

1-3. OPGcompatible

a synchronization of programs with

then

SING;

Issuing OPC? ; in place of

the command has

CLEAREG<Ol to 31) DATI

mmands

are OPC-comptible if there is only one standard in the class.

INSMTUNR

SAVC

SAVEREG<Ol to 31> NOOP NUMG

SING

PRES

RAID

REFD

HP-IB Programming and Command Reference

WAIT

to G>

Page 31

Reading Analyzer Data

Output Queue

Whenever an output-data command is received, the analyzer puts the data into the output queue (or buffer) where it is held until the system controller outputs the next read command. The queue, however, is only one event long: the next output-data command will overwrite the data already in the queue. Therefore, it is important to read the output queue immediately after every query or data request from the analyzer.

Command Query

All instrument functions can be queried to

the current ON/OFF state or value. For instrument state commands, append the question mark character (?) to the command to query the state of the functions. Suppose the operator has changed the power level from the analyzer’s front panel. The computer can ascertain the new power level using the analyzer’s command-query function. If a question mark is appended to the root of a command, the analyzer will output the value of that function. For instance, to 7 receives

and

outputs the current RF source power at the test port. When the analyzer

; ,it prepares to transmit the current RF source power level. This condition

the analyzer front-panel talk light

In this case, the analyzer transmits the

7 DB

sets the source power

output power to the controller. ON/OFF commands can be also be queried. The reply is a one (1) if the function is ON or a

zero (0) if it is OFF. For example, if a command controls an active function that is underlined on the analyzer display, querying that command yields a one (1) if the command is underlined or a zero (0) if it is not. As another example, there are nine options on the format menu and only one option is underlined at a time. Only the underlined option will return a one when queried.

For instance, send the command string DUAC? ; to the analyzer. If dual-channel display is switched ON, the analyzer will return a one (1) to the instrument controller.

Similarly, to determine if phase is being measured and displayed, send the command string

PHAS? ; to the analyzer. In this case, the analyzer will return a one (1) if phase is currently being displayed. Since the command only applies to the active channel, the response to the PHAS? ; query depends on which channel is active.

Identification

The analyzer’s response to IDN? ; is HEWLETT PACKARD, model number of the instrument and

is the

The analyzer also has the capability to output its serial number with the command OUTPSEBN; ,

and to output its installed options with the command OUTPOPTS

0, X . XX where 87NND is the

revision of the instrument.

Output Syntax

The following three types of data are transmitted by the analyzer in ASCII format:

response to query

certain output commands

ASCII floating-point (FORM 4) array transfers

Page 32

Marker-output commands and queried commands are output in ASCII format only, meaning that each character and each digit is transmitted as a separate byte, leaving the receiving computer to reconstruct the numbers and strings. Numbers are transmitted as 24character strings, consisting of:

DDDDDDDDDDDDDDD

3 digits

Figure

Decimal

Point

15 digits Sign Exponent

FORM 4 (ASCII) Data-Transfer Character String

for negative, blank for positive.

3 digits

Digits to the left of the decimal point.

Decimal point Standard decimal point.

15 digits

Exponent

Digits to the right of the decimal point. Exponent notation.

for negative,

for positive.

Two digits for the exponent.

When multiple numbers are sent, the numbers are separated by commas When number pairs

are sent, the numbers are separated by a comma and terminated with a line feed (IF).

Marker data

The network analyzer offers several options for outputting trace-related data. Trace information can be read out of the analyzer in several methods Data can be selectively read from the trace using the markers, or the entire trace can be read by the controller. If only specific information is required (such as a single point on the trace or the result of a marker search), the marker output command can be used to read the information. points can be read using the much faster data transfer than when using markers to output information on these commands, see “Limit Line and Data Point

commands. These commands allow a

data points For more

Functions,

Chapter 2.

data

located in

read the trace data using the marker, the marker must

be assigned to the desired frequency. This is accomplished using the marker commands The controller sends a marker command followed by a frequency within the trace-data range. If the actual desired frequency was not sampled, the markers can be set to continuous mode and the desired marker value will be linearly interpolated from the two nearest points This interpolation can be prevented by putting the markers into discrete mode. Discrete mode allows the marker to only be positioned on a measured trace-data point.

As an alternative, the analyzer can be programmed to choose the stimulus value by using the MARKER SEARCH function. Maximum,

determined with

MARKER SEARCH. ‘lb continually update the search, switch the

minimum, target value, or bandwidths search can be

marker tracking ON. The trace-maximum search will remain activated until:

The search is switched

The tracking is switched OFF.

Page 33

All markers are switched OFF.

Marker data can be output to a controller with a command to the analyzer. This set of

commands causes the analyzer to transmit three numbers: marker

1, marker value 2, and marker stimulus value. For example, in log-magnitude display mode we get the log magnitude at the marker complete listing of

l), zero (for value

and the marker frequency. See

for a

the possibilities for values 1 and 2. The three possibilities for the marker

stimulus value are:

frequency

time (as in time domain, Option 010 Only)

power (in power sweep mode)

Units as a Function of Display Format

Marker OUTPMAEK

Format

value 1

PHASE degrees

seconds

POLAR

REAL real

IMAGINARY

LIN MKR

G +

Siemens

LIN MKR

real

2 value 1 value 2

t t

degrees real degrees real

Siemens Siemens Siemens

degrees real

t t

degrees

seconds

real real real

real real

real

t t

degrees seconds

real

real ohms

real

value

degrees degrees

degrees

t t t t

marker readout values are the marker values displayed in the upper right-hand corner of the display.

They also correspond to the value and ‘Value 2 is not

MAG data expressed as: "Watts,” for single input measurements (A,B,R), and “Units,” for ratioed

in this format, though it is included in data transfers. See also OUTPFORF.

value associated with the fIxed marker.

1-22 HP-IB Programming and Command Reference

Page 34

Array-Data Formats

The analyzer can transmit and receive arrays in the analyzer’s internal binary format as

as four different numeric formats The current format is set with the

FORM3,

and

commands. These commands do not affect learn-string transfers,

calibration-kit string transfers, or non-array transfers, such as command query, or output

marker values. A transmitted array will be output in the current format, and the analyzer

attempt to read incoming arrays according to the current format. Each data point in an array is a pair of numbers,

a real/imaginary pair. The number of data points in each array is the same as

the number of points in the current sweep. The five formats are described below:

The analyzer’s internal binary format, 6 bytes-per-data point. The array is preceded by a four-byte header. The first two bytes represent the string “#A”, the standard block header. The second two bytes are an integer representing the number of bytes in the block to

data transfers, not to be modified by the computer nor interpreted by the user,

are required. IEEE

by the same header as in biased exponent, and a

floating-point format, 8 bytes-per-data point. The data is preceded

Each number consists of a l-bit sign, an S-bit

mantissa. FORM 2 is the format of choice if your

computer supports single-precision floating-point numbers IEEE

floating-point format, 16 bytes-per-data point. The data is preceded by the same header as in FORM 1. Each number consists of a l-bit sign, an

biased exponent, and a

mantissa. This format may be used with double-precision floating-point numbers. No additional precision is available in the analyzer data, but FORM 3 may be a convenient form for transferring data to your computer.

ASCII floating-point format. The data is transmitted as ASCII numbers, as described in “Output Syntax”.

There is no header. The analyzer always uses FORM 4 to transfer data that is not related to array transfers (i.e. marker responses and instrument settings).

PC-DOS point. The data is preceded by the same header as in FORM 1. The byte order is reversed to comply with PC-DOS formats If you are using a PC-based controller, FORM 5 is the most effective format to use.

The

terminates each

transmitted. Table

floating-point format with 4 bytes-per-number, 8 bytes-per-data

sion by asserting the EOI interface Iine with the last byte

offers a comparative overview of the five array-data formats.

1-23

Page 35

1-5.

8719D/20D/22D Network Analyzer Array-Data Formats

Format type

FORM 1 FORM 2

FORM 3

FORM 4

FORM 5

Type of Data

Internal IEEE

IEEE

ASCII

PC-DOS

Data Value

3 4

Bytes per point

2 data values

6 8

Bytes per trace

1206

1608

3216

10,050

1608

with header

1210 1612

3220

1612

Trace-Data Transfers

Transferring trace-data from the analyzer using an instrument controller can be divided into three steps:

1. allocating an array to receive and store the data

2. commanding the analyzer to transmit the data

3. accepting the transferred data Data residing in the analyzer is always stored in pairs for each data point (to accommodate

real/imaginary pairs). Hence, the receiving array has to be two elements wide, and as deep

as the number of points in the array being transferred. Memory space for the array must be

declared before any data can be transferred from the analyzer to the computer. As mentioned earlier, the analyzer can transmit data over HP-IB in five different formats. The

type of format affects what kind of data array is declared (real or integer), because the format determines what type of data is transferred. Examples of data transfers using different formats are discussed “Example 3: Measurement Data Transfer.” For information on the various types of data that can be obtained (raw data, error-corrected data, etc), see “Data Levels,” located later in this chapter.

For information on transferring trace-data by selected points, see “Limit Line and Data Point Special

Note

located in Chapter 2.

“Example

located in Chapter 2, explains how to access disk

Reading ASCII Disk Files to the Instrument Controller’s Disk

from a computer.

HP-IB Programming and Command Reference

Page 36

Stimulus-Related Values

Frequency-related values are calculated for the analyzer display. The start and stop frequencies or center and span frequencies of the selected frequency range are available to the programmer.

In a linear frequency range, the frequency values can be easily calculated because the trace

data points are equally spaced across the trace. Relating the data from a linear frequency sweep to frequency can be done by querying the start frequency, the frequency span, and the number of points in the trace.

Given that information, the frequency of point

in a linear-frequency sweep is represented by

the equation:

frequency + (n-1) x

In most cases, this is an easy solution for determining the related frequency value that

corresponds with a data point. This technique is illustrated in “Example

Data Transfer

Using FORM 4 (ASCII Format).” When using log sweep or a list-frequency sweep, the points are not evenly spaced over the

frequency range of the sweep. In these cases, an effective way of determining the frequencies of the current sweep is to use the OUTPLIML command. Although this command is normally

used for limit lines, it can also be used to identify all of the frequency points in a sweep. Limit lines do not need to be on in order to read the frequencies directly out of the instrument with the OUTPLIML command. Refer to example

“Data Transfer Using Frequency Array

Information.

Note

Another method of identifying all of the frequency points in a sweep is to use the marker commands MARKBUCKx and OUTPMARK in a FOR NEXT programming loop that corresponds to the number of points in the sweep. MARKBUCKx places a marker at a point in the sweep, where x is the number of the point in a sweep, and OUTPMARK outputs the

value as part of

the marker data.

Programming and Command Reference

1-25

Page 37

Data-Processing Chain

This section describes the manner in which the analyzer processes measurement data. It includes information on data arrays, common output commands, data levels, the learn string, and the calibration kit string.

Data Arrays

shows the different kinds of data available within the instrument:

pre-raw measured data

raw measured data

error-corrected data

formatted data

trace memory

calibration coefficients

Trace memory can be directly output to a controller with , but it cannot be directly transmitted back.

Programming and Command Reference

Page 38

One channel shown.

OUTPMEMO

Raw Data

OUTPDATF

OUTPFORM OUTPFORF

Accessible Array

OUTPRAF

Figure 1-4. The Data-Processing Chain

All the data-output commands are designed to insure that the data transmitted reflects the current state of the instrument:

OUTPDATA,

OUTPFORM, OUTPDATF,

and OUTPFORF will not

transmit data until all formatting functions have completed.

OUTPPRE transmits data in conjunction with

Programming Example

OUTPLIML,

lhke4

Error Correction Processed on an External PC.

and OUTPLIMF will not transmit data until the limit test has

occurred (if activated).

mode and the SWPSTART command. See

Programming and Command Reference

Page 39

OUTPMARK will activate a marker if a marker is not already selected. It will also insure that

any current marker searches have been completed before transmitting data.

insures that the statistics have been calculated for the current trace before transmitting data. If the statistics are not activated, it will activate the statistics long enough to update the current values before deactivating the statistics

OUTPMWID insures that a bandwidth search has been executed for the current trace before transmitting data. If the bandwidth-search function is not activated, it will activate the bandwidth-search function long enough to update the current values before switching OFF the bandwidth-search functions

Fast Data Transfer Commands

The HP 8753D has four distinct fast data transfer commanda These commands circumvent the internal “byte handler” routine and output trace dumps as block data. In other words, the

analyzer outputs the entire array without allowing any process swapping to occur ASCII data transfer times are not affected by these routines. However, there are speed improvements with binary data formats The following is a description of the four fast data transfer commands:

format. This data may be input to the analyzer using the INPUDATA command.

output format, but only the first number in each of the OUTPF’ORM data pairs is actually

and

formats, the INPUFORM command may not be used to re-input the data back into the thus eliminating it reduces the number of bytes transferred.

outputs the error corrected data from the active channel in the current output

outputs the formatted display trace array from the active channel in the current

-..-.

. . . .._._..._.

. . . .

Because the data array does not contain the second value for these display

The second value may not be

in some display formats (see ‘0ble

OUTPMEMF outputs the memory trace from the active channel. The data is in real/ii

pairs, and, as such, may be input back into the memory trace using INPUDATA or

memory trace using the

outputs the raw measurement data trace The data may be input back into the

command.

Data Levels

Different levels of data can be read out of the

in Figure 14.

following list describes the different types of data that are available from

the network

Pre-raw data

This is the raw data without attenuator offsets applied. With raw offsets turned off, the calibration coefficients generated

can be transferred to an external controller and used with

the data gathered using the

Programming Example 2E: lhke4 on an External Computer. The four arrays refer to

and S22 respectively. These four arrays are available only if

2-port correction or

Raw data

in The basic measurement data, reflecting the

parameters,

pairs

averaging, and IF bandwidth. If a full 2-port

measurement calibration is activated, there are actually four

Refer to the data-processing chain

commands See

Error Correction Processed

S21,

mode is on. This data is represented

1-28 HP-IB

Proflnmming and Command Reference

Page 40

raw arrays kept: one for each raw S-parameter. The data can

be output to a controller with the commands

Normally, only raw 1 is available, and it holds the current parameter. If a 2-port measurement calibration is active, the four arrays refer to

and

respectively. This data is represented in

real/imaginary pairs

Error-corrected data

This is the raw data with error-correction applied. The array represents the currently measured parameter, and is stored in real/imaginary pairs. The error-corrected data can be output to

a controller with the OUTPDATA

command. The OUTPMEHO

command reads the trace memory, if available. The trace

memory also contains error-corrected data. Note that neither raw nor error-corrected data reflect such post-processing functions as electrical-delay offset, trace math, or time-domain

Formatted data

This is the array of data actually being displayed. It reflects all post-processing functions such as electrical delay and time domain. The units of the array output depend on the current display format. See

for the various units

as a

function of display format.

Calibration coefficients

The results of a measurement calibration are arrays containing calibration coefficients. These calibration coefficients are then used in the error-correction routines. Each array corresponds to a

error term in the error model. The HP 87530

User’s

which error coefficients are used for

Network

specific calibration types, as well as the arrays those coefficients can be found in. Not all calibration types use all 12 arrays The data is stored as real/imaginary pairs

Generally, formatted data is the most useful of the five data levels, because it is the same information the operator sees on the display. However if post-processing is unnecessary (e.g. possibly in cases involving smoothing), error-corrected data may be more desirable. Error-corrected data also affords the user the opportunity to input the data to the network analyzer and apply post-processing at another time.

Learn String and Calibration-Kit String

The learn string is a the limit-test tables, and the list-frequency table for the current instrument state. It does not include calibration data or the information stored in the save/recall registers.

The learn string can be output to a controller with the command, which commands the analyzer to start transmitting the binary string. The string has a llxed length for a given firmware revision. The array has the same header as in FORM 1. See Example 5, ‘Using the

String.”

The calibration kit includes a set of key characteristics of the calibration standards used to

determine the calibration accuracy. There are default kits for several different connector types. There is also space for a user-defined calibration kit. The command OUTPCALK outputs the currently active calibration kit as a binary string in FORM 1. As with the learn string, the

calibration-kit string has a fixed length for a given

of the instrument state. It includes all the front-panel settings,

revision.

HP-IB Programming and Command Reference

1-29

Page 41

Error Reporting

This section describes the analyzer’s error-reporting process. It includes information on status reporting, the status byte, the event-status registers, and the error output.

Status Reporting

The analyzer status reporting structure is depicted in Figure

Refer to lhble

description of each bit within the status reporting structure.

ESNB

for a

SRE

2048

1024 512 256 128 64 32

64 32 16

EVENT STATUS REGISTER

Figure

4 2

Status

EVENT STATUS REGISTER B

Structure

130

Page 42

1-6. Status Bit

Status Byte

Bit Name

Waiting for reverse GET

Waiting for forward GET

Check event-status register B

Check error queue

Message in output queue

Check event-status register

One of the enabled status-byte bits is causing an

6 Request service

7 Preset

Bit

1 Request control

2 Query error

3 4 Execution error

5 Syntaxerror

6 User request

7 Power on

Bit

or calibration step complete

Data entry complete

Limit failed, Channel 2

Limit failed, Channel 1

Search failed, Channel 2

Search failed, Channel 1

7 Copy Complete

complete

Bit

sweep, number of groupa

routine waiting or done

Not applicable for the Not applicable for the BP

An error has occurred and the message has been placed in the error queue, but has not been read yet.

A command has prepared information yet.

An instrument preset has been executed.

A command for which OPC has been enabled has completed operation.

control of a peripheral, and needs control of mode.

The analyxer has been addressed to talk

queue to transmit. A sequence has executed the assert SRQ command. A command was received that could not be executed.

The incoming HP-IB can only be cleared by a device clear or an instrument preset.

The operator has pressed a front-panel key or turned the RPG.

A power-on sequence has occurred since the last read of the register.

A single sweep, group, or calibration step has been completed since the last

read of the register. An internal service routine has completed operation, or is waiting for an

operator response.

A terminator key has been pressed or a value entered over HP-IB since the

last read of the

Limit test failed on Channel 2.

Limit test failed on Channel 1.

A marker search was executed on

found.

A marker search was executed on Channel 1, but the target value was not

found.

A copy has been completed since the last read of the register.

Definition

ded

perform an operation that

Requires passcontrol

but

there is nothing in the output

Definition

but the target value was not

Programming and Command Reference

Page 43

1-7. Status Bit Definitions (Continued)

Limit failed, Channel 4 Limit failed, Channel 3 Search failed, Channel 4

Search failed, Channel 3

Event

Limit test failed on channel 4. Limit test failed on channel 3.

A marker search was executed on Channel 4, but the target value was not

found. A marker search was executed on Channel 3, but the target value was not

found.

Begister B (Contimed)

Status Byte

The analyzer has a status-reporting mechanism that reports information about specific analyzer functions and events The status byte (consisting of summary bits) is the top-level register. Each bit reflects the condition of another register or queue. If a summary bit is set (equals

the corresponding register or queue should be read to obtain the status information and

clear the condition. Reading the status byte does not affect the state of the summary bits.

The summary bits always reflect the condition of the summarized queue or register. The

status byte can be read by a serial poll or by using the command OUTPSTAT.

this command, the sequencing bit can be set by the operator during the execution of a test

sequence. OUTPSTATdoes not automatically put the instrument in remote mode, thus giving

the operator access to the analyzer front-panel functions The status byte:

When using

the error queue

summarizes two event-status registers that monitor specific conditions inside the instrument

contains a bit that is set when the instrument is issuing a service request (SRQ) over HP-IB

contains a bit that is set when the analyzer has data to transmit over HP-IB

Any bit in the status byte can be selectively enabled to generate a service request (SRQ) when set. Setting a bit in the service-request-enable register with the corresponding bit in the status byte. The units variable

represents the binary equivalent of

the bit in the status byte. For example, enables status-byte bits 3 and 4 (since

command enables the

= 24) and disables all the other bits SRE will not affect the state of the status-register bits.

The status byte also summarizes two queues: the output queue and the error queue. (The error queue is described in the next section.) When the analyzer outputs information, it puts the information in the output queue where it resides until the controller reads it. The output queue is only one event long. Therefore, the next output request will clear the current data. The summary bit is set whenever there is data in the output queue.

The Event-Status Register and Event-Status Register B

The event-status register and event-status register B are the other two registers in the status-reporting structure. They are selectively summarized by bits in the status byte via enable registers. The event-status registers consist of latched bits. A latched bit is set at the

beginning of a specific trigger condition in the instrument. It can only be cleared by reading

the register. The bit will not be reactivated until the condition occurs again. If a bit in one of these two registers is enabled, it is summarized by the summary bit in the status byte. The registers are enabled using the commands same manner as

The units variable represents the binary equivalent of the bit in the

status byte.

, both of which work in the

132

Page 44

If a bit in one of the event-status registers is enabled, and therefore, the summary bit in the

status byte is enabled, an SRQ will be generated. The SRQ will not be cleared until one of the five following conditions transpire:

1. The event-status register is read, clearing the latched bit.

2. The summary bit in the status byte is disabled.

3. The event-status register bit is disabled.

4. The status registers are cleared with the CLES ; command.

5. An instrument preset is performed.

133

Page 45

Service requests generated when there are error messages or when the instrument is waiting for the Group Execute Trigger (GET) command are cleared by:

reading the errors issuing GET (disabling the bits) clearing the status registers

Error Output

When an error condition is detected in the analyzer, a message is generated, displayed on the analyzer’s display screen, and placed in the error queue. Error messages consist of an error number followed by an ASCII string no more than

same message that appears on the analyzer’s display. The error queue holds up to 20 error messages in the order in which they occur. The error messages remain in the error queue until the errors are read by the system controller using the command OUTPERRO. The OUTPERRO

command outputs one error message.

long. The string contains the

Note

The error queue can only be cleared by performing an instrument preset or by cycling the line power. In order to keep the queue up-to-date, it is important to read all of the messages out of the queue each time errors are detected.

Calibration

Measurement calibration over the front-panel. For detailed information, refer to “Optimizing Measurement Results” in the

Network

1. Start by selecting a calibration kit, such as 50 ohm type N.

2. Select a calibration type, such as

ea&

calibration, the reflection, opened before the classes in the subsequence are called, and then closed at the end of each subsequence.

4. If a class has more than one standard in it, select a standard from the menu presented to STANG).

5. If, during a calibration, two standards are measured to satisfy one class, the class must be

closed with DONE

follows the same command sequence as a calibration from

User’s

l-port

transmis

sion,and isolation subsequences must be

../..../........

)

The

to STANG commands will hold off the

until completion because they trigger a sweep. If a class has only one standard in it, which means that it will trigger a sweep when called, the class command will also hold off the

Note

Since different class, any automated calibration sequence is valid only for a specific

1-34 HP-IB Programming and Command Reference

kits can have a different number of standards in a given

kit.

Page 46

1-8. Relationship between

and Classes

. TRL TRL

1 These subheadings must be 2 These subheadin@ must be called when doing TRL

when doing

Page 47

Error

3 4

9 10 11 12

1 One path, 2-port cal duplicates arrays 1 to 2 Response and isolation corrects for

transmission measurements, aud for reflection measurements.

Meaning of fhxt subscript:

D = directivity S

source match

reflection tracking

or isolation L-load match T

transmission tracking

ELF

ERR

in arrays 7 to 12.

and trawmission tracking in

and reflection tracking in

ELF

ERR

Meaning of second subscript:

R = reverse

136

Page 48

Disk File Names

Disk DOS format, the

the kind of information in the distinguish

Error corrected data, raw data, formatted data, memory traces, and calibration

FORM 3 data

decoded.

created by the analyzer consist of a state name of up to eight characters, such as

appended with up to two characters. In

The first appended character is the

format, the

name is

type,

The second appended character is a data index, used to

of the same type.

are

(IEEE

lists the appended characters and their meanings

I, P Instrument state

floating point format). The other files are not meant to be

Disk File Names

Four-channel

corrected data

Raw data

Display graphia,

Channel 1

Channel 2

Channel 3

Channel 4

Ch2/Ch4,rawarrays6t~8

raw arrays 1

Formatted data

Memory trace

Cal data, channel 1

Cal data, channel 2

2 F

Full page

plot)

Channel 1

Channel 2 Channel 3

3 4

Channel 4

Channel 1

Channel 2 Channel 3

Channel 4

CoefEcientsltoQ

B C

Sameaschannell

Lower

10 11 12

Right

Error corrected data (S2P)

plot)

Lower

Channel 1

Channel 2

HPJB Programming and Command Reference

137

Page 49

Using Key Codes

Using key codes to using other HP-IB commands This may be

remote control of the analyzer keys and can be used as an alternative

but it is a

recommended

programming practice to use the HP-IB command mnemonic appropriate for the function

desired.

Figure 1-6. Key Codes

When using key codes, the following notes must be taken into consideration:

Note 1: Note 2:

Note 3:

An “invalid key” is reported with a 63.

outputs the key code of the last key pressed. This command reports a

KOR?

outputs the last key code or knob count. If the reply is positive, it is a key code. If it is negative, then set bit 15 equal to bit 14, and the integer is the

knob count. It can be either positive or negative. There are about

two byte

120 counts per turn.

Page 50

Key Select Codes for the Network Analyzer

The HP-IB mnemonics in the following table are equivalent. For example, all of the mnemonics that correspond to softkeys accessed by means of the

AVG CAL-Error correction, calibration CAL-Calibration kits CAL-Power Meter Calibration CHANNEL COPY DISPLAY ENTRY FORMAT LOCAL

MENU (stimulus) MARKER MARKER FCTN SAVE/RECALL-Internal registers SAVE/RECALL-Disk SCALE REF SEQ-Sequencing STIMULUS

key, will be listed under the

key in the following table.

arranged by their front-panel key

SYSTEM-Limit testing SYSTEM-Transform

Column headings:

Function Action Mnemonic S ? 0

Symbol conventions:

D I

The front-panel function affected by the mnemonic The effects of the mnemonic on that function. The HP-IB mnemonic Syntax type. See “Syntax Types”, earlier in this chapter. Interrogate response. If a response is defined, it is listed. OPC-compatible command.

The range of acceptable inputs and corresponding units.

Optional data.

Numerical data.

An integer appendage that is part of the command. For example, where I= 1 to 5, indicates that the actual commands are CLEAl,

A character string operand which must be enclosed by double quotes A necessary appendage.

and

An either/or choice in appendages

Page 51

l-11. Key Select Codes

Averaging

smoothing

Correction

correction

Receiver

Factor

Set aperture

Set bandwidth

CAL-error correction,

Resume a previous& started

Set power level for receiver calibration

Mnemonic

AVG

SMOOAPER[D]

RESC

3 D

2 l,o

3 D

2 l,o

0.06 to 20%

loo, 300,

power

Adapter

set switching

receiver

Port 1 Port 2 Input A Input B

Set value

Set Value

Cal Port1

Adapter Adapter: Adapter: waveguide Remove adapter

measures

3 D 3 D f10 3 D 3 D 2 l,o

3 D

1 1

0.1

3 D

1 1

MODS

2 l,o

Hold measure6

then only 2 parameters)

Number of

CSWIOFF

2 l,o

3 D

Page 52

Key Select Codes (continued)

Function

Sweep modes

Calibrate

Intermediate

1 patI-&-port

Intermediate

Chop A and B

None

Response and Isol

l-port

z-port

One path

Reflection

Transmission Reflection Isolation

Transmission

Reflection

Reflection Line/match 1 Line/match 2

corn

Mnemonic

CHOPAB

CALN CALIRESP CALIRAI

REFOP

TRAN REFL

1 1

0,1

1 1 1

1 1 1 1

response

class

reflection

elect

elect isolation

hat standard

another menu.

(forward open)

(forward short)

(forward load)

(reverse open)

(reverse short)

match

isolation

are

measured

isolation

RAIRESP

FWDT

FWDM REVM

FWDI

OMII

if there

If there is more than one standard in the class, the class

only one standard in the class. If there is just one standard,

1 1

1 1 1 1 1 1

1 1 1 1

1 1 1

HP-IB Programming and Command Reference

Page 53

Key Select Codes (continued)

Function

standard

Sliding

load

Offset

load

Done

with:

Save

Select

default kits

correction, calibration (continued) Standard A Standard B Standard C

Standard D Standard E Standard F Standard G

Done

Load no Load offset

Reflection

load

and

l-port cal

a-port

N, 76 ohm

User-defined

SLID

LOAN

DONE

REFD

OFLD RESPDONE RAID

CAL-calibration kits

CALKUSED CALKTRLK

Mnemonic

s ? 0

1 1 1 1 1 1 1

1 1

1 1 1

1 1 1 1 1 1 1

1 l,0 1 l,0 1 l,0 1 l,0 1 1 l,0 1 l,0 1 l,0

1 l,0 1 l,0

kit

Modify

Define number std. definition)

142

Modify current

kit for the HP

and Command Referenca

and selects the HP 86062 series cal

for the

Page 54

Key Select Codes (continued)

Function

Define std. type

parameters

Define

std. offsets

Arbitrary

Fixed load Sliding load

load

Delay Loss Z0

frequency

Max. frequency

Waveguide

Mnemonic

kits (continued)

OFLS

OFSD[D]

3 3 3 3

1 1 1

3 3

3 3 3

1 1

0,1 0,1

(lo-15

0.1 to

Std.

done

Label std.

(forward open) (forward short) (forward load)

(reverse open) (reverse short) (reverse load)

Forward Tram Forward Match Reverse Reverse Match

Reflect Line or Match

3 3 3 3 3

3 3 3 3 3 3 3 3 3 3

LO char.

numbers numbers numbers numbers numbers numbers numbers numbers

numbers numbers numbers numbers numbers

143

Page 55

Key Select Codes (continued)

Function

done

Label

Resp.

Forward Forward Match LABEFWDM[ Reverse Tram LABEREVT[$]

Reverse Match

TRL Reflect TRL Liue or Match LABETRLL[$]

kit

done

isolation LABERESI[$]

Mnemonic

kits

CLAD

KITD

(continued)

3 3 3 3 3 3 3 3 3 3 3 3 3 3 3

3 10char.

char.

char. 10 10

char. 10

char. 10 char.

Save kit

Into user

Cal SET REF: Thru SET REF: Reflect

System

SAVEUSEK

SETRREFL

1 1 1 1

144

Page 56

Key Select Codes (continued)

Function

Edit power loss

table

Action

Off

Each sweep

sweep

Number of readin@

Edit

sequent Edit segment N Done with sequent Delete segment Done

Mnemonic

meter caIibration

PWMCOFF[D]

PWMCEACS[D]

PWEMCAL

SADD SEDI[D] SDON SDEL

1 3

D 1 1 1 1

Cal power:

-100 to loo

1 to 100

-100 to 100 dB

Sensor B HP

1 to 12

only

with

power loss

table

sensor

segment

For frequency or power sweeps, refer to Chapter 12, ‘Preset State and Memory

pass control mode when using the BP-IB port.

Frequency Value

sensor menu A sensor menu B segment

factor

segment

Guide.

CALFSENA

3 3

1 1 3 1

1 1 1

3 3

D D

in the

-9900

to 12

9900

only

145

Page 57

Key Select Codes (continued)

Function

Channel

Title plot

Printer

Printer setup

Plotter

Plotter setup

CH 1 active CH 2 active CH 3 active CH 4 active

Auto feed

Form feed

Default

Auto feed

Form feed

Default

Action

Mnemonic

COPY

PRINALL

2 l,o

PRNTRFORF

DEFLPRINT

2 l,o

s ? 0

1 1 1

1 1

10 char.

List

Operating

parameters

page

PREP

or Operating parameters

print color

Requires pass control mode when using the HP-IB port.

eturna 1, 2, 3, or 4.

Monochrome

Color PRIC

are not

but the channel active status may be found by using OUTPCHAN which

RESD

PRIS

1 1

146

Page 58

l-10. Key Select Codes (continued)

Print feature color Data channel 1

Data channel 2 Data channel 3 Data channel 4 Memory channel 1

Plotted

Memory Memory channel 3 Memory channel 4

GraticuIe Reference Iine

Data Memory Graticule

Marker

COPY

(continued)

PCOLMEMOl<color>

2 2

2 2 2 2 2 2 culon?~ 2 2 2 2 2 l,o 2 l,o 2 l,o 2 l,o 2 l,o

colors*

‘en number

wale

Left lower Left upper

lower

Data Memory Graticule

Marker

Data Memory

1 1

RIGL

PENNMARK[D]

1 1 1

3 3 3 3 3

3 3

1 1

. . .

. . . . . . . . .

. . . . . .

10 10 10 10 10

10 10

147

Page 59

Key Select Codes (continued)

Action

split One-graticule Two-graticule display

display

Two-graticule channel 2 on top

Two-graticule display with channel 3 on

Four-graticule display with channel 2 iu upper right

Four-graticule display with channel 3 in upper right

(Channel 2 data divided by channel 1 data, and displayed on channel 2)

Data

Memory only

Data

and mem

Data mem

with

Mnemonic

DISPLAY

DISPMEMO DISPDATM DISPDDM

DIVI

DISPDMM

2 2 1 1 1 1

1 1 1 1

notation

Data mem

Blank

Display

done

Background intensity

colors

Default colors

1 3 2 4

3 1 1 1

100

char.

148

Page 60

Key Select Codes (continued)

Modify specific

feature

Action

Ch 1 memory

Ch 2 memory

Ch 3 memory COLOCHSM

Ch 4 memory COLQCH4M Graticule Reference Iine

Brightness Color COLOR[D] Tiut Reset color to default

Mnemonic

s ?

1 1 1 1 1 1 1 1 1

1 1 1

3 D 3 D 3 D 1

149

Page 61

Key Select Codes (continued)

Function

Step keys

Entry off

Format

HP-IB modes

Debug

Action

UP Down

Phase Delay Smith chart Polar

Real

Use pass control

Display comma&~

Mnemonic

ENTRY

DOWN

FORMAT

LOGM

DELA

LINM REAL IMAG

USEPASC

s ? 0

1 1

1 1 1

1 1

2 l,o

Disk drive

HP-IB addresses

meter

Select plotter type Plotter

Select printer type

unit Volume

Plotter Printer Disk drive Controller ADDRCONT[D]

Address

HPGL printer

DeskJet LaserJet PRNTYPLJ

DISCVOLU[D]

ADDRDISC[D]

PRNTYPDJ

PRNTYPPJ PRNTYPEP

3 D 3 D

3 D 3 D 3 D 3 D

3 2

1 1

1 1 1 1 1 1

0 to 30

Page 62

Key Select Codes (continued)

Function

LOCAL (continued)

Select printer port HP-IB

serial

Parallel

serial Disk

Printer serial port Baud rate

port Handshake

port

Baud rate

port Handshake

port

Mnemonic

PRNPRTHPIB PRNPRTPARA PRNPRTSERI

1 1 1

1 1 1 1

3 D

2 1,0

3 D

2 1,0

1200, 2400,

GPIO = Gen.Purpose I/O,

use

AIR

B/R

A B R Selects Analog input

S-Parameters

parameters Z%mmmission

off

AR BR

MEASB

RFLP

CONVZTRA

1 1 1 0,l 1 0,l 1 1

1 0,l

1 0,l 1

1 1 1 1 0,l 1 0,l 1

Syntax type 1 when ANABOF’F. Syntax type 3, and range = 1 to 31, when ANABON. Refer to the

for

on the analog bus.

Page 63

Key Select Codes (continued)

Level

Always couple power Port power coupling

Power range Source power on/off Attenuator A (Option 086) Attenuator B (Option 086)

Mnemonic

MENU fstimul~~

PRANOQ POWROQ

2 2 2 2 2 2

2 2 2 2 2 2 2 2 2 2

2 2 2 2 2 2 2 2 2 2 2 2 2 3 3

0to55dB 0to55dB

Time

Measurement

Selects fastest sweep time

Restart

Programming and Command Reference

0.Ol to

Page 64

Key Select Codes (continued)

channels On/off

freq

type

MENU (stimnlns) (continued)

Hold

Number of groups Continuous

External trigger off External trigger on sweep External trigger on point

Manual trigger on point

Set value

Linear

List Select a segment Select all segments Power

CW time

HOLD TRIG SING NUMG[D]

FRER

POIN[D]

LINFREQ

LISFREQ

ASEG POWS

Mnemonic

? 0

1 0,l

2 0,l 2 0,l

1 0,l 1 0,l

3 D

2 l,o

3 D

1 0,l 1 0,l 1 0,l 3 0,l 1 0,l 1 0,l 1 0,l

2 0,l

OPC

1 to 999

3, 11, 26, 51, 101

201,401, 801, 1601

1 Add segment Edit segment N SEDI[D]

Delete segment Done Clear list

frequency or power sweeps, refer to Chapter 12, ‘Preset State and Memory Allocation,” in the

For CW time sweep,

Guide. For CW time: 0 to

on:

l/time step.

SADD

CLEL

hours. For frequency sweep, transform on:

1 3 D 1 1 1

l/frequency

Page 65

Key Select Codes (continued)

Function

Edit

segment Single segment sweep

active

Barker zero

reference

start

Center

Done with segment

All segment sweep ASEG

zero omets

Fixed marker DEZRFIXM

Mode off

Action

Mnemonic

MENU (stimuIns) (continued)

SPAN[D]

SDON

MARKER

3 D 3 D 3 D 3 D 3 D 3 D 3 D 1

1 1

3 D 1

rmget

1 to 1632

Fixed

mkr position Stimulus

Value Aux value MARKFAUV[D]

placement Discrete

Continuous

Couple channels

Uncouple MARKUNCO

Linear

For frequency or power sweeps, refer to Chapter 12, ‘Preset State and Memory

8719DBODBZD

For CW time sweep, transform on:

For

mag:

500 units. For SWR:

degrees,

User’s

500

For phase:

500 units. The scale is

seconds, and 10

For CW time: 0

500 degrees. For Smith chart and PoIaz

24 hours. For frequency sweep, transform on:

step.

positive, end has minimum values of

3 D 3 D 3 D

1 1

2 l,o

1 1 1

500 units. For

Amplitude range#

in the

l/frequency

magnitude:

HP-IB Programming and Command Reference

Page 66

Key Select Codes (continued)

Function

markers

function to

marker value

Action

MARKER

Linear

R+jX G+jB

start

Center

Reference MARKREF Delay

Off Maximum

Minimum

Search left Search right

Mnemonic

(continued)

SMIMLIN

SMIMGB

MARKDELA

s ? 0

1 0,l 1 1 0,l 1 0,l 1

2 l,o

1 1

1 1 1 1

1 0,l 1 0,l

1 0,l

3 D

1 1

For log mag:

Value Width on/off

500 dB. For phase:

3 D

500 degrees. For Smith chart and Polar:

500 units. For linear magnitude:

Amplitude

Programming and Command Reference

Page 67

Key Select Codes (continued)

Save

Clear Selected reg

Store

Title Disk file

Selected reg Selected reg

Selected reg

Selected reg Selected reg

reg

Internal reg

Save state llle

Plot

Selected

Action

Mnemonic

SAVEREG

CLEAREG

RECA RECAREG

PURG

s ? 0

2 2

4 4 4 4

1 to 5

01 to31

31, 10 char. 01 to 31, 10 char. 01

31, 10 char.

Copy Copy Iabels from register titles

with disk

format

Load

Requires pass control mode when using the HP-IB port.

Data (error correcte$

Formatted data User graphics Data only (error corrected,

From Recall file title&

Thiserrorcorrecteddat.aisthesameasthatoutputbythecomman d

from

titles

pairs)’

SAVUBINA

1 1

2 l,o

2 l,o 2 l,o 2 l,o 2 l,o

1 1

Page 68

Key Select Codes (continued)

Function

Select storage

Disk format

bference

Action

disk

LIF Directory size

memory

Internal disk

disk

DOS

Value

Position Value

Set deIay

Waveguide deIay

Mnemonic

INIE

INTM INTD

EXTD INTD FORMATDOS FORMATLIF

REFV[D] MARKREF

COAD WAVD

1 1

1 1 1 1

3 3

1 1

256

to 8192

Amplitude ranges

Amplitude range#

10.0

For log mag:

units. For

degrees,

sequence

to select seq.

Duplicate seq. X

Print sequence I

Title sequence I Clear sequence I

500

For phase:

500 units. The

seconds, and 10

CONS

sequence

PTOS DONM

500 degrees. For Smith chart and

is always positive, and has minimum values of

2 2 2

2 2

500 units. For

360 deg

magnitude:

Page 69

Key Select Codes (continued)

TTL

I/O

Save/recall

sequences

Special

functions

Action

out high continuously out low continuously low

end sweep high

end sweep low

I/O forward

reverse Programs alI GPIO output bits Set Clear specilled bit on GPIO Specify input GPIO bit for PARAIN(D]

IFBI Input GPIO bit high

SEQ

Input GPIO bit low

SEQ

Store sequence I to

Peripheral address Title to peripheral TIlTF%RI Wait D seconds SEQWAIT[D] Pause Marker to CW freq.

Title to HP-IB printer Title to pwr Show menus SHOM Assert seq. status bit Read pwr

title string

Send number into TITTMEM

trace memory

bit on GPIO SETBIT[D]

do IFBIHIGH

sequence I from

TSI’IOREV PARAOUT[D]

CLEABIT[D]

ADDRPERI[D]

EMIB

? 0

1 1 1 1 1

1 3 2 2 2

2 2

3 D

1 1 1 1 1 1 1 1

D ecision

then do sequence I

counter

Requires pass control when

Set value Increment by 1 Decrement by 1 If counter equals 0

then do sequence

If counter not equal to

0 then do sequence

the HP-IB port.

INCRLQOC DECRLOOC

0 to 32,760

Page 70

Key Select Codes (continued)

Function

STIMULUS

stimulus

Set clock

mode

Frequency oKset

For frequency or power sweeps, refer to Chapter 12, “Preset State and Memory

For CW time sweep, transform on:

Center

start

Time stamp

set date

Set time

attenuator Retrace power RETP<ONIOFF> Step sweep

Network analyzer Tuned receiver INSMTUNR External R channel EXTRCHAN

Value

Select up converter Select down converter DCONV View measurement/mixer

setup

For CW time: 0

INSMNETA

24 hours. For frequency sweep, transform on:

step.

Mnemonic

CENT[D]

SPAN[D]

SYSTEM

2 l,o 3 3

2 l,o 2 2

2 l,o

3 1 1 1 1

2 l,o

s ? 0

3 D 3 D 3 D 3 D

1 1 1

DD MMM YYY

frequency range of instrument

in the

l/frequency

Programming and Command Reference

Page 71

Key Select Codes (continued)

Function

Limit line

Limit test

Beeper

Limit oKset

Amplitude hlarker to offset

Edit table Begin

Add segment Edit segment D Delete segment Done with edit Clear list

Edit segment

Marker to Upper Iimit Lower Iimit Delta limits Middle value Marker to middle kgment done

edit

Action

EM-limit testing

LIMIMAOF

EDITLIML

value

Limittype

Iine type

point type

For frequency or power sweeps, refer to Chapter 12,

8719D/zOD/zaD

tip. For CW time sweep, transform on:

Guide For CW time: 0 to 24 hours. For frequency sweep, transform on:

l/time step.

Mnemonic

State and Memory

2 2

1 1

1 1 1

1 1 1 1 1

Amplitude range#

1 to 18

in the

l/frequency

l-mget

For log

500 units. For SWR:

degrees,

500

seconds, and 10

For phase:

500 units. The scale is always positive, and has minimum values of

500 degrees. For

chart and

500 units. For Iinear magnitude:

dB,

Page 72

Key Select Codes (continued)

Function

Time Domain Transform

Set freq

Mode Low pass impulse

Specify gate menu

Window

Window shape Demodulation

Maximum

Normal

Minimum Any value

Use trace memory

Action

Mnemonic

LOWPIMPU

SPEG

DEMOAMPL DEMOPHAS

1 1 1 1

l,o 1 1 1

2 3

dependent

shape

Wide

For frequency or power sweeps, refer

For CW time sweep, transform on:

Guide. For CW time: 0 to 24 hours. For frequency sweep, transform on:

1 1 1 1

-I

Chapter 12, “Preset State and Memory Allocation,” in the

step.

l/frequency

and Command Reference

Page 73

HP-IB Only Commands

1-12. HP-IB Only Commands

Action

Identify instrument

Key code

Move marker

On completion

Plot/print

Copy default

IDN?

KEY [D]

KOR?

Mnemonic SyntaxJ

MISCELLANEOUS

Outputs the PACKARD, 87NND,O,XXX”, where model number of the instrument and

revision of the instrument.

D Imitates pressing a key. The data transmitted is the

last key code or knob count. If the reply is

positive, it is a key code. If it is negative, then set bit

16 the RPG knob count. It can be either positive or negative. There are about 120 counts per turn.

D Moves the marker to the selected point on the trace.

On a 201 point sweep, D can range from 0 to 200.

Causes reporting of the completion.

Includes the plotting the screen.

Sets up a default state for copy.

bit 14, and the resulting two byte integer is

Description

string: “HEWLETT

is the is the

menu keys when printing or

command

Revision

Displays the software revision on the

the learn

from the analyzel The valid parameters are: 0: Defaults to current revision. 201: Revision 612: Revision

revision to input to and output

2.01

6.12

Page 74

Only Co

(continued)

Action

start

No operation

Select

l-port cal

External

trigger

NOOP

Mnemonic

syntax

JS (continued)

Description

Initiates a sweep and immediately releases the bus, allowing the analyzer to initiate data output as soon as the appropriate data is ready. Use in conjunction with

1,0

Initiates a mode in which every measurement cycle is characterized by sweeping in both the forward and reverse directions and collecting raw data for all four S-parameters. The sweeping can occur when a

analyzer is in continuous, number of external trigger mode.

Creates a cycle that has no operation. OPC compatible.

Provides access to functions within the l-port cal

menu. (HP 8610 compatibility.)

Sets the trigger polarity high. Sets the trigger polarity low.

or SING

mode only.

is received or when the

‘ormatted Data

meter

WAIT

INPUFORM[D]

SAVC

INPUCALK[D]

Makes the analyzer wait for a clean sweep when used with the OPC command.

D D

3 3

errorsorrected data.

formatted data.

raw data.

an individual error coefficient array. Issue the

command

type), then input each of the appropriate

error

issue

OPC compatible command denotes completion of

the error coefllcienta transfer

power meter cal array.

kit.

specifies the data

using “INPUCALC”.

the instrument.

be entered

the learn string. Preceded by SELL if learn

string is not current revision.

Page 75

Only Co

(continued)

Action

function

channel OUTPCHAN

OUTPOPTS

Serial number

dentify OUTPIDEN

Interp. cal.

OUTPDATF

Mnemonic

. . .

syntax ? Description

OUTPUT 1

Outputs value of function in active entry area in ASCII format.

Outputs the active channel number.

Outputs an ASCII

Outputs the serial number of the analyzer.

See IDN?

Outputs the selected error

active channel. Each array is the same as a data array.

See

Outputs the active

Outputs the error corrected data from the active

channel in Fastdatatransferco

of the options

array from the

l-9, for the contents of the arrays.

the selected interpolated

kit, a less than 1000 byte string

pairs. See Figure l-4.

mmand for OUTPDATA.

coel&ient array.

Error

formatted

Power meter

meter cal. OUTPPMCAL

OUTPERRO

OUTPFORM

OUTPFORF

OUTPIPMCAL

Outputs the oldest error in the error queue. The error

number is

format (FORM 4).

Outputs the formatted trace data from the active channel in current transferred.

Fast data transfer

transferred. See

Outputs the interpolated power meter channel 1 or channel 2.

Outputs power meter channel 2. Values are sent as 100 times the power meter reading in

Outputs the code of the format. See Figure for a knob turn.

by the error message in ASCII

units. See

command for OUTPFORM. Only the

number of the OUTPFORM data pairs is

l-4.

array for channel 1 or

key pressed, in ASCII

for key codes. -1

l-4 for data

array for

1-64 HP-IB Programming and Command Reference

Page 76

HP-IB Only Co

mmands (continued)

Action

Learn

External source

smoothing

Sequencing

Limit

Limitlist

Limit marker

Mnemonic

OUTPRFFR

OUTPSEQ

OUTPLIMF

OUTPLIML

syntax

OUTPUT (continued)

Outputs the learn string in binary, not intended for decoding.

Outputs source instrument mode.

Outputs the smoothing aperture.

Outputs sequence I (I = 1 to 6) listing over HP-IB.

Outputs the limit results as described under OUTPLIML for only those

Outputs the Iimit test results for each The results consist of four numbers. The

for no test, 0 for fail, 1 for pass. The third number is the upper limit value, and the fourth is the lower Iimit value. This is an ASCII transfer (FORM 4).

OUTPLIML for the active marker.

Description

source RF frequency when in external

points that failed.

point.

is the

value tested, the second is the test

Marker

Memory

Marker statistics

Bandwidth

Bandwidth+ loss

Plot

OUTPMARK

OUTPMEMO

OUTPMWID

Outputs the active marker values in 3 numbers. The

two numbers are the marker values, and the last

the stimulus value. See

Outputs the memory trace from the active channel. It

be treated the same as data from

Fast data transfer comman

Outputs marker statistics: mean, standard deviation,

and peak to peak deviation. ASCII format (FORM 4).

Outputs results of bandwidth searchzbandwidth, center;

and Q. ASCII format (FORM 4).

Same operation as OUTPMWID plus the loss value.

Outputs the

HP-IB port. Can be directed

plot string in ASCII format to the

for the marker values

for OUTPMEMO.

plotter or

HP-IB Pro6ramming and Command Reference

Page 77

HP-IB Only

mmands (continued)

Pre-raw data

data

Mnemonic

OUTPPRIN OUTPPRNALL

syntax ?

OUTPUT (continued)

1 1

1 1 1

Outputs the print string of the dispIay graphics. Outputs

Operating and marker parameters in ASCII. Activate the desired function with LISV to print values or OPEF to print operating parameters prior to this command.

Array 1 that pre-raw data has not had sampler correction nor attenuator offsets applied. Use in conjunction with

mode Array 2 Array 3 (512 data). Array 4

Array 1 (Sll the active channel. Raw 1 holds the sin&e parameter data unless a

1 holds

respectively. The data is in Array 2 Array 3 (512 data). Array 4 Fast data transfer

Description

List Values or current page of

data). Analogous to OUTPRAW except

data).

uncorrected data arrays for

and the following arrays hold

data).

mmand for

is on, in which case raw

pairs.

and

byte

title

Max values

Min

values OUTPAMIN*

Min/Max

Min/max

For the detinition of a limit segment, see “Example Display of Limit Lines” in the Chapter 2 section titled “Limit

Refer to the “Lhnit Line and Data Point Special Functions” section in Chapter 2.

values

value

and Data Point Special

Outputs the status byte. ASCII format (FORM 4).

Outputs max values for all limit line segments.

Outputs min values for

Outputs Iimit test segment

Outputs Iimit test

the

min value for

title. ASCII format

max stimuhq max value, min

4).

limit Iine segments.

se@. Outputs the

active segmentat

for a

segment.

1-66 HP-IB Programmin6 and Command Reference

Page 78

HP-IB Only Co

mmands (continued)

Data: point

Data: range

Limit test: chl Limit test:

test:

Limit test: ch4

Limit test status

report

Mnemonic

OUTPDATP

OUTPDATR

syntax

(continued)

1 1 1 1

Description

Outputs trace data indexed by point. (see SELPT[D])

Outputs trace data for range of points. (see SELMINPT[D],

Outputs Outputs Outputs Outputs

Outputs the segment number and its limit test

See

mmand is similar to OUTPLIMF except that it

reports the number of

test.

Outputs the date of the clock in the following format: DDMMMYYYY

of limit test for channel 1. of limit test for of limit test for channel 3. of limit test for channel 4.

all active segmentat

the

and trace values for each failed point in the

test

for a

segment.

followed by the

2 1,0

Segment

point

specify point

Refer to the “Limit Line and Data Point 3pecial Functions” section in Chapter 2.

returned for limit test status are: 1 (PASS), 0

For the defhrition of a limit segment, see “Example Display of Limit Lines” in the Chapter 2 section titled “Limit

Outputs the

Enables/disables and max

Selects segment OUTPSEGM w

1 to

D Selects the last point number in the range of points

that the from 0 to the number of points minus 1.

Selects the that the OUTPDATR w from 0 to the number of points minus 1.

D Selects point number that the OUTPDATR command

-1 (NO-LIMIT)

report. D can range from 0 to the number of points

minus 1.

of the clock in the following format:

recording per segment. Min

are recorded per limit segment.

for the OUTPSEGF and

to report on. D can range from

mmandwillreport. Dcanrangc

point number in the range of

Page 79

HP-IB Only Co

Mnemonic syntax ?

OUTPUT

1 1 1 1 1

(continued)

HP 8719/20/22 internal format, with header. 32 bit floating point, with header (IEEE).

64 bit floating point, with header (IEEE). ASCII format. No header. 32 bit PC format (bytes reversed).

Press Label

Clear CLES

ESB? ESR?

Enable

ESNB[D]

Averaging MENUAVG

MENUDISP

Marker

MENUMEAS

Marker function

MENURECA

MENUSBQU

2 4

STATUS REPORTING

1 1 1

MENUS

1 1 1 1 1 1 1 1

1 1 1 1

Activates

Writes label (10 char) to indicated softkey I, where I = 1

commands

Clears the status byte.

Returns event-status register B. Returns the

Returns the status byte.

Enables event-status register. (O<D<265)

Enables event-status register B. (O<D<256)

D Enables SRQ.

I, I= 1 to 8.

mmand requires previous

and MENUOFF;.

1-66

Page 80

Alphabetical Mnemonic Listing

Mnemonic

Description

Measures and displays A/B on the active channel. Sets adapter electrical delay. Controller HP-IB address: the address where control is returned

after a pass control. Disk HP-IB address. Peripheral HP-IB address (for sequencing). See also Plotter HP-IB address. Power meter HP-IB address Printer HP-IB address Sets adapter to Sets adapter to ALC control. Places the analyzer in the alternate inputs measurement mode,

where measurements are made on alternate sweeps See also

CHOPAB Enables the analog bus for service use.

Measures and displays the data at the auxihary input (ANALOG IN).

Measures and displays A/R on the active channel.

ASEG ASSS

AUTO

These 3 commands control the warning beeper, causing it to sound if the indicated condition occurs:

Uses all segments for list frequency sweep. See also SSEG[D]. Asserts the sequence status bit. Attenuator A (Option 085 Only). Attenuator B (Option 085 Only).

Enables and disables the auxiliary channels (3 and 4). OPC-compatible.

Auto scale the active channel.

Sets the averaging factor on the active channel. Turns averaging ON and off on the active channel. Restart the averaging on the active channel.

Sets the background intensity of the display.

Selects the time domain

mode.

The completion of functions such as save, done with calibration

standard, and data trace saved. A

test

HP-IB Programming and Command Reference

Page 81

The generation of a warning message. Blanks the display.

Measures and displays B/R on the active channel.

These commands set the open capacitance values of an open circuit while it is being defined as

a calibration standard.

Accepted for compatibility with the HP 8510, where its function is to begin a calibration sequence.

These commands set the power meter calibration factor corrections for the particular sensor used. Sensor B is only

Sets the calibration factor. Selects the frequency for the calibration factor correction.

which has two input channels:

CALFSENA

CALFSENB

These commands begin a calibration sequence:

These commands select a default calibration kit:

Edits the sensor A calibration factor table. Edits the sensor B calibration factor table.

Short, load, open, thru One-path Response and isolation. Response.

l-port.

reflect, line or Line, reflect, match

(HP

2.92’ (HP (HP

(HP

kit).

Note

selects the HP

the HP 85052 series

(HP

Type-N 50 Type-N 75

kit for the HP

kits for the HP

kit and HP 85050 series).

ohm (HP 85032B/E

ohm (HP 85036B/E

and selects

kit). kit).

Page 82

TRL

(HP

cal kit).

CALKUSED

CALN

CALZLINE

User-defined calibration kit.

Calibration: none. Turns calibration type to off. Provides access to the power meter calibration functions. Recalls cal set associated with Port 1 for adapter removal. Recalls cal set associated with Port 2 for adapter removal. Establishes the line or match standard(s) as the characteristic

impedance for a Establishes the system

for a

calibration.

(see

as the characteristic impedance

Adjusts the color brightness of the selected display feature. (See COLOXXXX commands)

Sets the center stimulus value. If a

frequency segment is being

edited, sets the center of the list segment. Makes channel 1 the active channel. OPC-compatible. Makes channel 2 the active channel. OPC-compatible. Makes channel 3 the active channel. OPC-compatible. Makes channel 4 the active channel. OPC-compatible. Places the analyzer in the chop measurement mode. See also

CLAD

Class done, modify cal

specify class

These commands call reflection standard classes during a calibration sequence. If only one standard is in the class, it is measured. If there is more than one, the standard being used must be selected with

If there is only one standard in the class, these

commands are OPC-compatible.

l-port, opens l-port, shorts l-port, loads

l-port, opens l-port, shorts

l-port, loads

These commands (all OPC- compatible) clear the indicated save/recall registers:

Clears save/recall register 1. Clears save/recall register 2. Clears

register 3. Clears save/recall register 4. Clears save/recall register 5. Clears the limit line list. Should be preceded by EDITLIML.

Page 83

Clears

the save/recall registers. OPC-compatible.

Clears the specified bit on the GPIO. Clears save/recall registers 01 through 31.

are the same as

through

compatible.

These commands clear the sequence from the internal registers:

Sequence 1. Sequence 2. Sequence 3. Sequence 4. Sequence 5. Sequence 6.

Clear the currently selected list. This could be a frequency list, power loss list, or limit test list.

Clears the status register, the event-status registers, and the enable registers.

Same as CLES. Selects coaxial electrical delay. See also WAVD.

COAX

Selects coaxial offsets instead of waveguide while defining a standard during a

kit modification.

through

These commands select the indicated display feature for color modification:

Channel 1 data and limit lines.

Channel 1 memory. Channel 2 data and limit lines. Channel 2 memory. Channel 3 data and limit lines.

Channel 3 memory.

Channel 4 data and limit lines Channel 4 memory. Graticule. Reference line.

Warning.

Adjusts the color saturation for the selected display feature.

CONS

Continues the paused sequence.

1-72 HP-IB Programming and Command Reference

Page 84

Continuous sweep trigger mode.

These 6 commands convert the S-parameter data to:

Inverted S-parameters.

CONVOFF

Conversion OFF.

transmission.

Copies labels from file titles. Copies labels from register titles. Turns interpolative error correction ON and OFT. Turns error correction ON and Couples and uncouples the stimulus between the channels Couple the power when coupled channels is turned OFF, COUCOFF. Selects test set continuous switching (ON) or test set hold (OFT)

when there is a 2-port calibration active. Continuous switching

is allowed only when the power ranges on both attenuator ports

are set the same. When continuous switching is ON, the analyzer

measures all four S-parameters each time before displaying the

data for a full 2-port cal measurement. In test set hold mode, the analyzer measures all four S-parameters once and then measures the desired parameter continuously. measurement and it is less accurate than a full

is known as a fast 2-port

calibrated

measurement.

DATI

Sets the CW frequency for power sweep and CW frequency modes While the list frequency table segment is being edited, it sets the center frequency of the current segment.

Selects the CW time sweep type.

This command divides the data in channel 2 by the data in channel

1 and displays the result on channel 2. Dual display must be on

(DUACON;).

Positions channels in a 2X display with channel 2 on top. Positions channels in a 2X display with channel 3 on top. Positions channels in a

display with channel 2 in the upper right. Positions channels in a 4X display with channel 3 in the upper right. Stores trace in channel memory. OPC- compatible. Selects down converter for mixer measurements.

Turns the HP-IB debug mode ON and OFF. When ON, the analyzer

scrolls incoming

commands across the display.

Page 85

DECRLOOC

Decrements the sequencing loop counter by 1.

DEFC DEFLPIUNT

Sets the default colors for all display features Sets the printer to the following default setup conditions:

Monochrome

Auto-feed

Print Colors:

Data

Magenta

Green Data Memory

Blue

Red

Graticule

Black

Text

Black

Sets up the following default state for copy. There is no equivalent front-panel key.

Plotter Type: PLOTTER Plotter Port: SERIAL

Printer Type: Printer Port:

DESKJET

PARALLEL Baud Rate: Handshake:

9600 Xon-Xoff

HP-IB Address: 5

Parallel Port:

COPY

Begins standard definition during

Baud Rate: 19200 Handshake:

Address: 1

kit modification. D is the

standard number. Displays the data formatted as group delay. Turns the delta marker mode

These 6 commands make the indicated marker the delta reference:

Marker 1. Marker 2. Marker 3. Marker 4. Marker 5.

marker.

Xon-Xoff

Turns on transform demodulation and sets the transform demodulation to amplitude demodulation. Only has a meaningful effect with a CW time transform.

and Command Reference

Page 86

Turns the transform demodulation function OFF.

DEMOPHAS

DISCVOLU[D]

Sets the transform demodulation to phase demodulation. Only has a meaningful effect with a CW time transform.

Sets the plotter to the following default setup conditions

Plot Data On Plot Mem On Plot Grat On Plot Text On Plot Mkr On

Auto-feed On

Scale Plot Pull Plot Speed Past

Pen Number:

Data Memory 5 Graticule 1

Marker 7

Line Type:

Data

Memory 7

Sets the number of

in the directory at disk initialization.

only.

Specifies which disk in an external multiple-disk drive to be used for save/recall.

which volume of an external multiple-volume disk drive to

be used for save/recall.

When on, displays the response and sthnulus values for all markers that are turned on; when off, only the active marker’s value is displayed.

These 6 commands display the indicated combinations of data and trace memory on the active channel:

Data only. Data and memory.

DISPDDM DISPDMM DISPMEMO DM

DONE

Data divided by memory (linear division, log subtraction). Data minus memory (linear subtraction). Memory only. Same as DISPDDM.

Done with a class of standards, during a calibration. Only needed when multiple standards are measured to complete the class

DONM DOSEQ DOWN

Done modifying a test sequence. Begins execution of the selected sequence. I = 1 to 6. Decrements the value in the active entry area (down key).

channel display ON or OFF

Duplicates sequence X to sequence Y. X,Y = 1 to 6.

Programming and Command Reference

Page 87

Done editing list frequency or limit table.

Begins editing limit table.

ELED[D]

Sets the electrical delay offset. Send out a beep during a sequence. Tums the active entry area

ESB?

Outputs event-status register B. Enables the selected event-status register bits to be summarized by

bit 5 in the status byte. An event-status register bit is enabled when the corresponding bit in the operand D is set.

ESNB[D]

Enables the selected event-status register B bits to be summarized by bit 2 of the status byte. A bit is enabled in the register when the corresponding bit in the operand D is set.

ESR?

Outputs the value of the event-status register.

These commands include the indicated information when a register is stored on disk. See

l-4 for data types:

Adds error corrected data (real and imaginary pairs) along with the other

Error corrected data array only (real and imaginary pairs). Formatted trace data. Uses currently selected format for data. User graphics Raw data arrays (real and

pairs).

Sets the external trigger line high. Sets the external trigger line low. Deactivates the external trigger mode. OPC- compatible. Activates the external trigger mode. OPC- compatible. Sets the external trigger to auto trigger on point. OPC- compatible.

Sets the internal phase lock reference selection switch on or off. This allows the analyzer to receive its R channel input through the R CHANNEL IN port or from its own internal source.

Specifies a fixed load, as opposed to a sliding load or offset load, when

a standard during a cal kit

These 5 commands set the data format for array transfers in and out of the instrument:

internal format. Preceded by 4 byte header.

32 bit floating point format. Preceded by 4 byte header.

64 bit floating point format. Preceded by 4 byte header.

Programming and Command Reference

Page 88

ASCII format. No header.

32 bit floating point PC format. Bytes reversed. Preceded by 4 byte

header.

These commands define the format to use on disk initializations:

FORMATDOS

Selects DOS as the disk format.

Selects LIF as the disk format.

Activates the frequency offset instrument mode. OPC- compatible.

Frequency blank. Turns OFF frequency notation.

HP-IB free run. Acts the same as CONT; .

Selects full page plotting, as opposed to plotting in one of the four

quadrants

These 3 commands select a forward calibration class, during a

They are OPC-compatible if there is only one standard in the class:

FWDI

FWDM

Isolation.

Match.

Transmission.

These 5 commands control the time domain gate:

Center time.

Gate ON/OFF, OPC-compatible.

Span time.

Start time.

Stop time.

These 4 commands set the gate shape:

Minimum.

Normal.

GATSWTDE

GOSUB

HOLD

IDN?

Wide.

Invokes a sequence as a subroutine. I =

to 6.

Puts the sweep trigger into hold.

Outputs the

where

the

is the model number of the instrument and

revision of the instrument.

string: HEWLETT PACKARD,

0, X . XX,

These 7 commands branch an executing sequence to a new sequence if the following condition is satisfied.

IFBIHIGH

Tests the

input GPIO bit (see

If high, invokes

the sequence which follows

Page 89

IFBILOW

Tests the specified input GPIO bit (see

If low,

invokes

the sequence which follows. Sets the IF bandwidth. If loop counter equals zero, then do the sequence that follows If loop counter does not equal zero, then do the sequence that

follows. If limit test fails, then do sequence that follows. If limit test passes, then do sequence that follows

IMAG

Selects the imaginary display format. Increments the sequencing loop counter by 1. Initializes the internal disk. All previous information on the disk

will be destroyed. Initializes the external disk. All previous information on the disk

will be destroyed. Requires pass control when using the HP-IB port.

These commands input

individual error coefficient array. Before sending an array, issue a CALIXXXX ; command, where XXXX specifies the calibration type of the data. Then input the array or arrays Lastly store the data with SAVC

. The instrument goes into hold, displaying

uncorrected data. Complete the process by triggering a sweep. See for the contents

of the different arrays.

Array 1. Array 2. Array 3. Array 4. Array 5. Array 6. Array 7. Array 8. Array 9. Array 10. Array 11. Array 12. Inputs a cal kit read out with

data should be saved into the user

. After the transfer, the

kit area with SAVEUSEK; .

Inputs an error corrected data array, using the current setting of the

FORM command. Inputs a formatted data array, using current the current setting of

the Inputs a learn string read out by

command.

; .

Page 90

These commands input power meter calibration arrays into the instrument. Values should be entered as

x power meter reading in

Channel 1.

INPUPMCALZ

These commands input a raw data array using the current format. See

Channel 2.

for the

meaning of the arrays The instrument stops sweeping, error corrects the data, then formats

and displays the data.

Array 1. Array 2. Array 3. Array 4.

These commands select the instrument mode. They are

OPC-compatible.: Standard network analyzer. OPC-compatible. Tuned receiver. OPC-compatible.

Selects the internal disk as the active storage device. Sets the display intensity, 50 to 100 percent. Selects the internal memory for save/recall. Done with isolation subsequence in a 2-port calibration.

OPC-compatible. Begins the isolation subsequence step in a 2-port calibration. Selects isolation for one path, two port calibration.

Sends a keycode, equivalent to actually pressing the key. It does not matter if the front-panel is in remote mode. See Figure key codes

Calibration kit done This is the last step in modifying a cal kit.

KOR?

Outputs last key code or knob count. If the reply is positive, it is a key code. If it is negative, then set bit 15 equal to bit 14, and the resulting two byte integer is the RPG knob count. It can be either positive or negative. There are about 120 counts per turn.

These commands enter labels for the standard classes during a cal kit modification:

Forward match. Forward transmission. Response, response and isolation. Response. Reverse match. Reverse

for the

(opens).

(shorts).

Programming and Command Reference

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(loads).

LABK[

(opens). (shorts). (loads).

TRL line or match. TRL thru.

reflect. Enters a cal kit label during a cal kit modification. Enters a standard’s label during standard definition.

Selects a plot in the left lower quadrant. Selects a plot in the left upper quadrant. Enters the limit line amplitude offset. Turns the display of the limit lines ON and Marker to limit offset. Centers the limit lines about the current

marker position using the limit amplitude offset function. Enters the stimulus offset of the limit lines. Turns limit testing ON and OFT.

These 8 commands edit a limit test segment. The limit table editing is begun with and a segment is brought up for editing with SEDI

or added using SADD

. The segment is

closed with SDON; , the table is closed with EDITDONE;

Sets the limit delta value while editing a limit line segment. Sets the lower limit value. Sets the middle limit value. Sets the limit stimulus break point. Makes the segment a flat line. Makes the segment a sloping line. Makes the segment a single point. Set the upper limit value.

Selects a linear frequency sweep. Selects the linear magnitude display format. Enters the line type for plotting data. Enters the line type for plotting memory. Selects the list frequency sweep mode.

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Activates the list values function. The next page of values can be called with NEXP

and the previous page can be called with

; . The current page can be plotted or printed, in raster graphics mode, with PLOT;, or PRINALL

respectively. The entire L;

(Since these commands may need to take control of an HP-IB peripheral, the system controller must have pass control capability.)

These 5 commands load the command. The actual

from disk with the name indicated by the previous

loaded depends on the file title in the

command. Requires pass control mode.

Loads the preceding TITF 1; command.

preceding

These 6 commands load the command. The actual

from disk with the name indicated by the previous

loaded depends on the

command. Requires pass control mode.

Loads sequence 1 from disk. Loads sequence 2 from disk.

Loads sequence 3 from disk.

position specified by the

from disk using the

name provided by the

command.

from disk using the

name provided by the

; command.

from disk using the

name provided by the

command.

from disk using the file name provided by the

; command.

title in the

position specified in the

LOAN

LOGFREQ LOGM

Loads sequence 4 from disk. Loads sequence 5 from disk.

Loads sequence 6 from disk.

Measures the load as not being offset when a standard has been

as an offset load (see OFLS).

Measures the load as being offset when a standard has been

as an offset load (see OFLS). Sets the local oscillator frequency for use in frequency offset mode. Selects a log frequency sweep. Selects the log magnitude display format.

Turns ON the low pass impulse transform. Turns ON the low pass step transform.

Same as

(output learn string).

Same as INPULEAS (input learn string).

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Sets the external trigger to manual trigger on point. OPC-compatible.

These commands make the indicated marker active and set its stimulus value:

Marker 1. Marker 2. Marker 3. Marker 4. Marker 5.

Places the active marker on a specific sweep point (bucket). D is the bucket number, ranging from 0 to number of points less 1.

Sets the center stimulus value to that of the active marker’s stimulus value.

Places the markers continuously on the trace, not on discrete points (interpolates the marker values between discrete points).

Couples the markers between the channels, as opposed to

Sets the CW frequency to the active marker’s frequency.

electrical length so group delay is zero at the active marker’s

Places the markers on the discrete measurement points Sets the auxiliary value of the hxed marker position. Works in

coordination with MARKFVALandMARKFSTI. Sets the

position of the hxed marker. Sets the value of the fixed marker position. Same as

(search for maximum on current channel’s trace).

During a limit segment edit, makes the marker amplitude the limit segment middle value.

Sane as

(search for

minimum on current channel’s trace). Turns all markers and marker functions OFT. Sets the reference value to that of the active marker’s amplitude. Sets the span for the entire trace to that of the span between the

active marker and the delta reference marker. Sets the start

to that of the active marker’s

During a limit segment edit, sets the limit stimulus break point to that of the active marker’s

Sets the stop

to that of the active marker’s

Uncouples the markers between channels, as opposed to

Places the hxed marker at the active marker position and makes it the delta reference.

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Sets the number of power meter readings per point used during a power meter calibration.

OFLD

Offset loads done. Selects the calibration standard load as being an offset load, as opposed to

a sliding or fixed load, during a cal kit modification.

These 3 commands specify the offset value for the indicated parameter for a standard being

during a

kit modification:

Delay offset.

OFSL[D]

Loss offset.

Impedance offset.

Omits the isolation step of a calibration sequence. Operation complete. Reports the completion of the next command

received by setting bit 0 in the event-status register, or by replying to an interrogation if OPC? ; is issued.

OPEP

Presents a list of key operating parameters. NEXP ; calls the next page of parameters and the previous page can be called with . Requesting a plot or print copies the current page. The current page can be plotted or printed, in raster graphics mode, with PLOT;, or PRINALL mode, with of an

respectively. The entire list can be printed, in

. Since these commands need to take control

text

peripheral, the system controller must have pass control

capability.

When the auxiliary channels are enabled in 2x or 4x split mode, formats the display so that the auxiliary channels are vertically or horizontally aligned to their primary channels

Outputs the value of the active function, or the last active function if the active entry area is OFF.

Outputs the max values for all limit line segments Outputs the

values for all limit line segments.

Outputs the smoothing aperture in stimulus units, rather than as a percentage.

These 12 commands output an error correction array for the active calibration on the active channel. See set form determined by the

for the contents of each array. Each array is output in the currently

command. The data is in real/imaginary pairs, the same

number of pairs as points in the sweep.

Array 1. Array 2. Array 3.

Array 4. Array 5. Array 6. Array 7.

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Array 8. Array 9. Array 10. Array 11. Array 12.

OUTPCALK

OUTPCHAN

OUTPDATA

OUTPDATF

OUTPFAJP

Outputs the currently active calibration kit, as a less than 1000 byte

string. The data is in FORM 1.

Outputs the active channel number, where:

1 = channel 1

channel 4

84 Outputs the error corrected data from the active channel. See

Figure

and

command. Fast data transfer command for OUTPDATA. = Outputs the trace data indexed by point (see Outputs the trace data for range of points (see

SELMAXPT[D]).

Outputs the oldest error message in the error queue. Sends fkst the

error number, and then the error message itself as a string no longer than 50 characters.

This command is similar to number of

followed by the

except that it reports the

and trace values

for each failed point in the test.

OUTPFORM

Outputs the formatted display data array from the active channel.

See

format. See also

for the contents of the array as a function of display

command.

Fast data transfer command for OUTPFORM.

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These 12 commands output an interpolated error coeihcient array for the active calibration on the active channel. See

for the contents of each array. Array 1. Array 2. Array 3. Array 4. Array 5. Array 6. Array 7. Array 8. Array 9. Array 10. Array 11. Array 12.

OUTPIDEN

Outputs the identification string for the analyzer: HEWLETT

PACKARD, instrument and

. XX where

is the

is the model number of the

revision of the instrument.

These 2 commands output the interpolated power meter calibration arrays for channels 1 and

Channel 1. Channel 2.

Outputs the key code of the last key pressed. An invalid key is

reported with a 63, a knob turn with a -1. See

for the

front-panel key codes Outputs the learn string, which contains the entire front panel state,

the Iimit table, and the Iist frequency table. It is always in binary format not intended for decoding.

Outputs the status of the

test for channel 1. Outputs the status of the Iimit test for channel 2. Outputs the status of the Iimit test for channel 3. Outputs the status of the Iimit test for channel 4.

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These 3 commands output the Iimit test results. The results consist of four fields. First is the stimulus at that point. Fourth is the lower Iimit at that point. If there are no

for the point. Second is an integer indicating test status. Third is the upper Iimit

at that point, the

third and fourth fields are zero. The test status is-l for no test, 0 for fail, and 1 for pass.

Outputs the Iimit test results for each failed point. Outputs the Iimit test results for each point in the sweep. This is an

ASCII transfer. Outputs the Iimit test results at the marker.

Outputs the marker values. The

response values, and the last is the

two numbers are the marker

value. See

for

the meaning of the response values as a function of display format.

OUTPMEMO

Outputs the memory trace from the active channel. The data is in

pairs, and can be treated the same as data read with

the OUTPDATA command. Fast data transfer command for OUTPMEMO. Outputs the marker statistics: mean, standard deviation, and

peak-to-peak variation in that order. If statistics is not ON, it is turned ON to generate current values and turned OFF again. See also

OUTPMWID

Outputs the marker bandwidths search results: bandwidth, center, and Q in that order. If widths is not ON, it is turned ON to generate current values and turned OFF again.

Performs the same operation as OUTPMWID plus appends the loss

Outputs an ASCII string of the options

OUTPPLOT

Outputs the plot string. Can

directed to a plotter, or read into the

computer.

These commands output the power meter calibration array. Values should be entered as 100 times the power meter reading in sweep,

has not been taken:

A default array is used if a power meter calibration

Channel 1. Channel 2.

These 4 commands output the pre-raw measurement data. See Figure 14 for the meaning of the data. Analogous to OUTPRAW except that pre-raw data has not had sampler correction nor attenuator offsets applied. These offsets are not necessary for data that corrected. See BASIC programming Example External Computer. The arrays hold

Array 1 Array 2 Array 3 Array 4

data). data). data).

data).

and

Error Correction Processed on an

respectively:

HP-IB Programming and Command Reference

be fully error

Page 99

Outputs a raster dump of the display, intended for a graphics printer.

OUTPPRNALL

Outputs all of the List Values or Operating parameters in text mode. Activate the desired function by preceding with LISV or OPEP, respectively.

These 5 commands output the raw measurement data. See Figure 14 for the meaning of the data. Normally, array 1 holds the current parameter. If a hold

and

respectively:

calibration is active, the arrays

Fast data transfer command for Array 1. Array 2. Array 3.

Array 4.

OUTPSEGAF

Outputs the segment number and it’s limit test status for all active

segments

Outputs the limit test

for all segments Outputs the segment nwnber, max stimulus, max value, min stimulus, min value for all active segments

Outputs the limit test status for a

segment. See

SELSEG[D] .

OUTPSEGM

Outputs limit test

for a Outputs I’s sequence listing. I = 1 to 6. Outputs the serial number of the analyzer.

OUTFSTAT Outputs the status byte.

Outputs the display title.

Specify the input GPIO bit to be used by IFBIHIGH and tests.

Selects use of the parallel port: for general purpose copy function.

Programs all GPIO output bits (0 to 255) at once. Inserts a pause into a sequence. Same as ADDRCONT. Indicates where control will be returned after

a pass control.

segment. See SELSEG[D].

or for the

1-88 HP-IB Programming and Command Reference

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These 12 commands select the color for printing the indicated display feature where <COLOR>

is one of the following colors: white, cyan, magenta, blue, yellow, green, red, or black.

Channel 1 data. Channel 2 data. Channel 3 data.

Channel 4 data.

Channel 1 memory. Channel 2 memory. Channel 3 memory. Channel 4 memory.

Graticule. Reference line. Displays text.

Warning text.

Selects whether trace data is plotted.

These 5 commands select the pen (value for D) for plotting the indicated display feature for the active channel:

PLOS<SLOW(FAST>

PLOT

Data trace.

Graticule.

Markers and marker text. Memory trace.

and user graphics Selects whether the graticule is plotted. Sets the phase offset. Selects the phase display format. Selects the pen speed for plotting. (Slow is useful for transparency

plotting.) Initiates a plot.

Selects the plotter handshake mode as either Xon-Xoff or DTR-DSR. Sets the plotter port to disk (either internal disk or external disk). Sets the plotter port to HP-IB. Sets the plotter port to parallel. Sets the plotter port to serial. Turns ON and OFT the plotter auto feed. Sets the plotter baud rate. Sends a form feed to the plotter.

Selects HP-GL compatible Selects

as the plotter type.

HP-IB Programming and Command Reference