HP 81101A Reference Manual

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Page 1

Reference Guide

HP 81101A 50 MHz Pulse Generator

Page 2

Front Panel Display and Softkeys

Mode / Parameter Area

Use the CURSOR keys to move

the entry focus to a mode,

parameter format, or

parameter value

Per 1.000µs Normal

Delay1 0ps Width LeadE TraiE

100.0ns

5.00ns =LeadE

OUTPUT TRG-LEVLIMITSMODE/TRG

Press a SOFTKEY to access

the required entry screen

Screen Selection Area

Modify / Enter Area

Entry Focus

OFF

Offset Amplit

+0.0mV

1.00V

50Ω into 50.0Ω

MODE/TRG TRG-LEV MEMCARD CONFIG

Use the KNOB to select a

mode or modify parameters

and formats

Press ENTER or a UNIT key to

confirm parameter changes

MODIFY

*OFF ON

Press MORE key to access

the additional screen menus:

GRAPH

Page 3

Reference Guide

HP 81101A 50 MHz

Pulse Generator

HP Part No. 81101-91011

Printed in Germany September 1998

Edition 1.0, E0998

Page 4

Notice

 1998 Hewlett-Packard GmbH Herrenberger Str. 110–140 71034 Boeblingen Germany

Warranty

This Hewlett-Packard product has a warranty against defects in material and workmanship for a period of three years from date of shipment. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products that prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard. The Buyer shall pay Hewlett-Packard's round-trip travel expenses. For products returned to Hewlett-Packard for warranty service, the Buyer shall prepay shipping charges to HewlettPackard and Hewlett-Packard shall pay shipping charges to return the product to the Buyer. However, the Buyer shall pay all shipping charges, duties and taxes for products returned to Hewlett-Packard from another country. Hewlett-Packard warrants that its software and firmware designated by Hewlett-Packard for use with an instrument will execute its programming instructions when properly installed on that instrument. Hewlett-Packard does not warrant that the operation of the instrument software, or firmware, will be uninterrupted or error free.

Page 5

Notice

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Buyer, Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

No other warranty is expressed or implied. Hewlett-Packard specifically disclaims the implied warranties of merchantability and fitness for a particular purpose.

Exclusive Remedies

The remedies supplied are the Buyer’s sole and exclusive remedies. Hewlett-Packard shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort or any other legal theory.

Assistance

Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard products. For any assistance, contact your nearest Hewlett-Packard Sales Office.

Certification

Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States Institute of Standards and Technology, to the extent allowed by the Institute's calibrating facility, and to the calibration facilities of other International Standards Organization members.

Page 6

About this Book

This guide provides reference information primarily for programming the HP 81101A via remote control.

Chapter 1 “General Programming Aspects” on page 13 gives general

hints for programming instruments like the HP 81101A using SCPI commands.

Chapter 2 “Programming Reference” on page 25 provides detailed

information on the SCPI commands supported by the instrument.

Chapter 3 “Specifications” on page 89 lists the instrument’s technical

specifications and provides exact definitions for the instrument’s parameters.

For an introduction and information on the HP 81101A’s user interface, please refer to the Quick Start Guide, p/n 81101-91010.

Page 7

About this Book

Conventions Used in this Book

This book uses certain conventions to indicate elements of the HP 81101A’s user interface. The following table shows some examples:

Softkeys Press the MODE/TRG softkey to access the Mode/

Trigger screen.

Hardkeys Press the MORE key to switch to the alternative

softkey layout.

Alternate Keys Press SHIFT + 0 (ON/OFF) to switch on the output.

The alternate key label—which is selected by pressing the SHIFT key—is given in parentheses.

Screen Quotes Move the entry focus down to P

turn the knob to select

INTERNAL

ULSE-PERIOD

PLL.

and

Entry Focus The highlight field, that can be moved with the

cursor keys, to change modes, parameters, or parameter formats.

:VOLTage:HIGH 3V

Full command for programming a 3 V high level. The upper case letters represent the short form of the command, which results in faster programming times.

*RST Common IEE 488 command, to reset instrument

to default status.

Page 8

Safety Information

Safety

This is a Safety Class 1 instrument (provided with terminal for protective earthing). Before applying power, verify that the correct safety precautions are taken (see the following warnings). In addition, note the external markings on the instrument that are described under Safety Symbols. Do not operate the instrument with its covers removed. Replace fuse only with specified type.

Warning

Before turning on the instrument, you must connect the protective earth terminal of the instrument to the protective earth conductor of the (mains) power cord. The mains plug must only be inserted in a socket outlet with a protective earth contact. Do not negate the protective action by using an extension power cord without a protective grounding conductor. Grounding one conductor of a two-conductor outlet is not sufficient protection.

Service instructions are for trained service personnel. To avoid dangerous electric shock, do not perform any service unless qualified to do so. Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

If you energize this instrument using an auto-transformer (for voltage reduction) make sure that the common terminal is connected to the earth terminal of the power source.

Whenever it is likely that the ground protection is impaired, you must make the instrument inoperative and secure it against any unintended operation.

Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

Do not install substitute parts or perform any unauthorized modification to the instrument.

Page 9

Safety Information

Capacitors inside the instrument may retain a charge even if the instrument is disconnected from its source of supply.

Safety Symbols

Instruction Manual symbol: The instrument is marked with this symbol when it is necessary for you to refer to the instruction manual in order to protect against damage to the instrument.

Protected conductor symbol.

In the manuals:

WARNING

CAUTION Cautions call attention to a procedure, practice, or the like, which, if not

Warnings call attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury or loss of life. Do not proceed beyond a Warning until the indicated conditions are fully understood and met.

correctly performed or adhered to, could result in damage to or destruction of part or all of the equipment. Do not proceed beyond a Caution until the indicated conditions are fully understood and met.

Page 10

Safety Information

Page 11

Contents

Notice ......................................................................................... 4

About this Book ......................................................................... 6

Safety Information .................................................................... 8

Chapter 1

Chapter 2

General Programming Aspects

The HP-IB Interface Bus ......................................................... 14

HP 81101A Remote Control .................................................... 15

Programming Recommendations ............................................ 16

Common Command Summary ................................................. 18

Status Model ............................................................................ 19

Programming Reference

HP 81101A SCPI Command Summary .................................... 26

Default Values, Standard Settings ......................................... 31

Programming the Instrument Trigger Modes ........................ 35

SCPI Instrument Command List ............................................ 38

Page 12

Contents

Chapter 3 Specifications

Declaration of Conformity ..................................................... 90

HP 81101A Specifications ...................................................... 91

General ................................................................................................... 91

Timing Specifications ........................................................................... 93

Level Specifications .............................................................................. 96

Clock Sources ........................................................................................ 97

Output Modes ........................................................................................ 99

Trigger Modes ...................................................................................... 100

Trigger and Strobe Specifications ..................................................... 101

Human Interface .................................................................................. 103

Memory ................................................................................................. 103

Remote Control ................................................................................... 104

Pulse Parameter Definitions ................................................ 105

xii

Page 13

1General Programming

Aspects

This chapter provides general information on writing HP-IB/SCPI programs for instruments like the HP 81101A.

Detailed information on programming the HP 81101A can be found in

Chapter 2 “Programming Reference” on page 25.

Page 14

General Programming Aspects

The HP-IB Interface Bus

The Hewlett-Packard Interface Bus is the interface used for communication between a controller and an external device, such as the HP 81101A. The HP-IB conforms to IEEE standard 488-1987, ANSI standard MC 1.1, and IEC recommendation 625-1.

If you are not familiar with the HP-IB, please refer to the following books:

•

Hewlett-Packard Company: Publication 5952-0156, Tutorial Description of Hewlett-Packard Interface Bus.

•

The Institute of Electrical and Electronic Engineers: IEEE Standard

488.1-1987, IEEE Standard Digital Interface for Programmable Instrumentation.

•

The Institute of Electrical and Electronic Engineers: IEEE Standard

488.2-1987, IEEE Standard Codes, Formats, and Common

Commands for Use with IEEE Standard 488.1-1987.

In addition, the commands not from the IEEE 488.2 standard are defined according to the Standard Commands for Programmable Instruments (SCPI). For an introduction to SCPI and SCPI programming techniques, refer to the following documents:

•

Hewlett-Packard Press (Addison-Wesley Publishing Company, Inc.): A Beginners Guide to SCPI by Barry Eppler, 1991.

•

The SCPI Consortium: Standard Commands for Programmable Instruments, published periodically by various publishers. To obtain a copy of this manual, contact your Hewlett-Packard representative.

Page 15

General Programming Aspects

HP 81101A Remote Control

HP-IB Address You can only set the HP-IB address from the front panel of the instrument

(refer to the Quick Start Guide). The default HP-IB address is 10.

Modes of Operation

The HP 81101A has two modes of operation:

•

Local The instrument is operated using the front panel keys.

•

Remote After receiving the first command or query via the HP-IB, the

instrument is put into remote state. The front panel is locked. To return to local operating mode, press SHIFT (LOCAL).

Page 16

General Programming Aspects

Programming Recommendations

Here are some recommendations for programming the instrument:

•

Start programming from the default setting. The common command for setting the default setting is:

*RST

•

Switch off the automatic update of the display to increase the programming speed. The device command for switching off the display is:

:DISPlay OFF

•

The SCPI standard defines a long and a short form of the commands. For fast programming speed it is recommended to use the short forms. The short forms of the commands are represented by upper case letters. For example the short form of the command to set 100 ns double pulse delay is:

:PULS:DOUB:DEL 100NS

•

To improve programming speed it is also allowed to skip optional subsystem command parts. Optional subsystem command parts are depicted in square brackets, e.g.: enable double pulse mode by

[SOURce]:PULSe:DOUBle[1] [:STATe] O N|OFF. Sufficient to use: :PULS:DOUB ON

•

For the commands to set the timing and level parameters, except of period/frequency, you can explicitly specify output 1 (for compatibility reasons). If there is no output specified, the commands will set the default output 1.

So, for setting a high level of 3 Volts for output 1 the commands are:

:VOLT:HIGH 3V # sets high level of 3 V at out 1 :VOLT1:HIGH 3V # sets high level of 3 V at out 1

•

It is recommended to test a new setting that will be programmed on the instrument by setting it up manually.

Enable the outputs so that the instrument’s error check system is on and possible parameter conflicts are immediately displayed.

Page 17

General Programming Aspects

Programming Recommendations

When you have found the correct setting, then use this to create the program. In the program it is recommended to send the command for enabling outputs (for example, :OUTPut ON) as the last command. With this procedure it is possible to switch off the error check system (:SYSTem:CHECk OFF) to increase programming speed.

The error check is enabled again by sending *RST.

*RST # set default settings :DISP OFF # switch off display update :SYST:CHEC OFF # switch off error check ... # other commands to set modes ... # and parameters :OUTP ON # enable the output

• Selftest of the instrument can be invoked by the common command

*TST

• If it is important to know whether the last command is completed, then send the common command

*OPC?

Page 18

General Programming Aspects

Common Command Summary

This table summarizes the IEEE 488.2 common commands supported by the HP 81101A:

Command Parameter Description

*CLS – Clear the status structure *ESE <0–255> Set the Standard Event Status register mask *ESE? – Read the state of the Standard Event Status enable register *ESR? – Read the state of the Standard Event Status event register *IDN? – Read the Instrument's Identification string *LRN? – Read the complete Instrument Setting *OPC – Set the Operation Complete bit when all pending actions

are complete *OPC? – Read the status of the Operation Complete bit *OPT? – Read the installed options *RCL <0–9> Recall a complete Instrument Setting from memory *RST – Reset the instrument to standard settings *SAV <1–9> Save the complete Instrument Setting to memory *SRE <0–255> Set the Service Request Enable Mask *SRE? – Read the Service Request Enable Mask *STB? – Read the Status Byte *TRG – Trigger *TST? – Execute instrument’s selftest *WAI – Wait until all pending actions are complete

Page 19

Status Model

TIONABLE STATUS

QUES

Voltage Warning Current Warning

Timi ng War ning

Frequency Warning

Operation Complete

Query Error

Device Dependent Error

Execution Error Command Error

Power On

0 1 2 3 4 5 6 7 8 9

OPERation Status

(NOT USED)

0 1 2 3 4 5 6 7 8 9

Standard Event Status

0 1 2 3 4 5 6 7

MAV

SRQ

Status Byte

0 1 2 3 4 5 6 7

General Programming Aspects

Status Model

The instrument has a status reporting system conforming to IEEE 488.2 and SCPI. The above figure shows the status groups available in the instrument.

Each status group is made up of component registers, as shown in the following figure.

Page 20

General Programming Aspects

Conditi

Enabl

Status Model

ransition

Filters

vent

Summary Bit Hardware and Firmware condition

1 0

PTR NTR

1 0

Latched

Condition Register

A condition register contains the current status of the hardware and firmware. It is continuously updated and is not latched or buffered. You can only read condition registers. If there is no command to read the condition register of a particular status group, then it is simply invisible to you.

Transition Filters

Transition filters are used to detect changes of state in the condition register and set the corresponding bit in the event register. You can set transition filter bits to detect positive transitions (PTR), negative transitions (NTR) or both. Transition filters are therefore read/write registers. They are unaffected by *CLS.

Event Register

An event register latches transition events from the condition register as specified by the transition filters or records status events. Querying (reading) the event register clears it, as does the *CLS command. There is no buffering, so while a bit is set, subsequent transition events are not recorded. Event registers are read only.

Page 21

General Programming Aspects

Status Model

Enable Register

The enable register defines which bits in an event register are included in the logical OR into the summary bit. The enable register is logically ANDed with the event register and the resulting bits ORed into the summary bit. Enable registers are read/write, and are not affected by

or querying.

*CLS

Although all status groups have all of these registers, not all status groups actually use all of the registers. The following table summarizes the registers used in the instrument status groups.

Registers in Group

Status Group

QUEStionable

*ESR? *ESE *STB? *SRE

to query.

to set,

to query

to set,

OPERation

Standard Event Status

Status Byte

1 Present, but not used. COND and EVEN always 0. 2 Use 3 Use 4 Use 5 Use

CONDition NTR PTR EVENt ENABLe

√ √ √ √ √

xxxxx

xxx

to query

*ESE?

to query

*SRE?

√

Page 22

General Programming Aspects

Status Model

Status Byte

The status byte summarizes the information from all other status groups. The summary bit for the status byte actually appears in bit 6 (RQS) of the status byte. When RQS is set it generates an SRQ interrupt to the controller indicating that at least one instrument on the bus requires attention. You can read the status byte using a serial poll or *STB?

Bit Description

0 Unused, always 0 1 Unused, always 0 2 Unused, always 0 3 QUESTionable Status Summary Bit 4 MAV—Message AVailable in output buffer 5 Standard Event Status summary bit 6 RQS; ReQuest Service 7 OPERation Status summary Bit, unused

Standard Event Status Group

Bit Description

0 Operation Complete, set by *OPC 1 Unused, always 0 2 Query Error 3 Device Dependent Error 4 Execution Error 5 Command Error 6 Unused, always 0 7 Power On

Page 23

OPERation Status Group

This Status Group is not used in the instrument.

Bit Description

0 Unused, always 0 1 Unused, always 0 2 Unused, always 0 3 Unused, always 0 4 Unused, always 0 5 Unused, always 0 6 Unused, always 0 7 Unused, always 0 8 Unused, always 0 9 Unused, always 0

General Programming Aspects

Status Model

10 Unused, always 0 11 Unused, always 0 12 Unused, always 0 13 Unused, always 0 14 Unused, always 0 15 Always 0

Page 24

General Programming Aspects

Status Model

QUEStionable Status Group

Bit QUEStionable

0 Voltage warning 1 Current warning 2 Time warning 3 Unused, always 0 4 Unused, always 0 5 Frequency warning 6 Unused, always 0 7 Unused, always 0 8 Unused, always 0 9 Unused, always 0 10 Unused, always 0 11 Unused, always 0 12 Unused, always 13 Unused, always 0 14 Unused, always 0 15 Always 0

The QUEStionable Status group is used to report warning conditions amongst the voltage, current, pulse timing and frequency parameters. Warnings occur when a parameter, although not outside its maximum limits, could be causing an invalid signal at the output because of the actual settings and uncertainties of related parameters.

Page 25

2Programming Reference

This chapter provides reference information on the following topics:

•

“HP 81101A SCPI Command Summary” on page 26

•

“Default Values, Standard Settings” on page 31

•

“Programming the Instrument Trigger Modes” on page 35

•

“SCPI Instrument Command List” on page 38

For general programming information, please refer to Chapter 1

“General Programming Aspects” on page 13.

Page 26

Programming Reference

HP 81101A SCPI Command Summary

Command Parameter Description

:ARM

[:SEQuence[1] | :STARt]

[:LAYer[1]] :EWIDTh

[:STATe]

:FREQuency

:IMPedance :LEVel :PERiod

:SENSe :SLOPe :SOURce

ON|OFF|1|0 Set/read External Width mode <value> Set/read trigger frequency, when

<value> Set/read impedance at EXT INPUT <value> Set/read threshold level at EXT INPUT <value> Set/read trigger period, when PLL(INT2)

EDGE|LEVel Set/read trigger on edge or gate on level POS|NEG|EITH Set/read trigger slope at EXT INPUT IMM|INT2|EXT|MAN Set/read trigger source

(Trigger mode and source)

PLL(INT2) used as source

used as source

(VCO|PLL|EXT INPUT|MAN key)

see page

:DISPlay

[:WINDow]

[:STATe]

:MMEMory

:CATalog? :CDIRectory :COPY :DELete :INITialize :LOAD

:STATe

:STORe

:STATe

ON|OFF|1|0 Set/read front panel display state

[A:] Read directory of memory card [<name>] Change directory on memory card <source>[,A:],<dest>[,A:] Copy a file on memory card <name>[,A:] Delete a file from memory card [A:[DOS]] Initialize memory card to DOS format

<n>,<name> Load file from memory card to memory n

<n>,<name> Store memory n to memory card

Page 27

Programming Reference

HP 81101A SCPI Command Summary

Command Parameter Description

:OUTPut[1]

[:NORMal]

[:STATe]

:IMPedance 47

[:INTernal]

:EXTernal

:POLarity

[:SOURce]

:CURRent[1]

[:LEVel]

[:IMMediate]

[:AMPLitude] :OFFSet :HIGH :LOW

:LIMit

[:HIGH] :LOW :STATe

:FREQency

[:CW | :FIXed]

:AUTO

:HOLD[1]

:PHASe[1]

[:ADJust]

:PULSe

:DCYCLe[1] :DELay[1]

:HOLD

:UNIT

OFF|ON|1|0 Set/read normal output state

<value> Set/read internal source impedance of

output

<value> Set/read expected external load imped-

ance at output

NORM|INV Set/read output polarity

<value> Set/read channel amplitude current <value> Set/read channel offset current <value> Set/read channel high level current <value> Set/read channel low level current

Set/read maximum current limits Set/read minimum current limits

ON|OFF|1|0 Enable/Disable the current limits

<value> Set/read frequency of pulses ONCE Measure frequency at CLK-IN VOLT|CURR Switch between VOLtage and CURRent

command subtrees

<value> Set/read channel phase

<value> Set/read channel duty cycle <value> Set/read channel delay (to leading edge) TIME|PRATio Hold absolute delay|phase delay fixed

with varying frequency

S|SEC|PCT|DEG|RAD Set/read delay units

see page

Page 28

Programming Reference

HP 81101A SCPI Command Summary

Command Parameter Description

:DOUBle[1]

[:STATe]

:DELay

:HOLD

:UNIT

:HOLD[1]

:PERiod

:AUTO :TDELay[1] :TRANsition[1]

:HOLD

:UNIT

[:LEADing]

:TRAiling

:AUTO

:TRIGger[1]

:VOLTage

:WIDTh[1]

OFF|ON Enable/disable double pulses per pulse

period <value> Set/read delay between double pulses TIME|PRATio Hold absolute delay|phase delay fixed

lay fixed with varying frequency <value> Set/read pulse period ONCE Measure pulse period at CLK-IN <value> Set/read trailing edge delay

TIME|WRATio Hold absolute transitions|transitions as

width ratio fixed with varying width per

period S|SEC|PCT Set/read transition time units <value> Set/read leading edge transition <value> Set/read trailing edge transition OFF|ON|ONCE Couple trailing edge to leading edge

TTL|ECL Set/read TRIGGER|STROBE OUTput

levels <value> Set/read channel pulse width

see page

[:SOURce]

:ROSCillator

:SOURce :EXTernal

:FREQuency

:VOLTage[1]

[:LEVel]

[:IMMediate]

[:AMPlitude]

INTernal|EXTernal Set/read PLL reference source

<value> Set/read frequency of external PLL

reference

<value> Set/read channel amplitude voltage

Page 29

HP 81101A SCPI Command Summary

Command Parameter Description

:OFFset :HIGH :LOW

:LIMit

[:HIGH] :LOW :STATe

:STATus

:OPERation

[:EVENt]? :CONDition :ENABle :NTRansition

:PTRansition :PREset :QUEStionable

[:EVENt]?

:CONDition?

:ENABLe

:NTRansition

:PTRansition

<value> Set/read channel offset voltage <value> Set/read channel high level voltage <value> Set/read channel low level voltage

Set/read maximum voltage limit Set/read minimum voltage limit

ON|OFF|1|0 Enable|Disable the voltage limits

Read Operation event register Numeric Read Operation condition register Numeric Set/Read Operation enable register Numeric Set/Read Operation negative transition

Clear and preset status groups

Read Questionable event register

Read Questionable condition register Numeric Set/Read Questionable enable register Numeric Set/Read Questionable negative transi-

tion register Numeric Set/Read Questionable positive transi-

tion register

Programming Reference

see page

:SYSTem

:CHECk

[:ALL]

[:STATe] :ERRor? :KEY

:PRESet :SECurity

OFF Switch error checking off

Read error queue

Numeric Simulate key press or read last key

pressed no function

Page 30

Programming Reference

HP 81101A SCPI Command Summary

Command Parameter Description

[:STATe] :SET :VERSion? :WARNing

[:COUNt]?

:STRing?

:BUFFer?

:TRIGger

[:SEQuence [1] | :STARt]

:COUNt

:IMPedance

:LEVel

:SLOPe

:SOURce

ON|OFF Switch security on and off Block data Set/read complete instrument setting

Read SCPI compliance setting

Read number of active warnings Read active warnings as concatenated

string Read maximum possible length of con-

catenated string

(Pulse mode and period source)

<value> Set/read number of triggered periods to

be generated per ARM event <value> Set/read impedance at CLK-IN <value> Set/read threshold level at CLK-IN POS|NEG Set/read trigger slope at CLK-IN IMM | INT[1] | INT2 |EXT Set/read trigger source

(IMM | VFO | PLL | CLK-IN)

see page

Page 31

Programming Reference

Default Values, Standard Settings

Parameter *RST, Default Values

:ARM : EWIDth:STATe OFF

:FREQuency 100kHz

:IMPedance 50

:LEVel +1.00V

:PERiod 10.00µs

:SENSe EDGE

:SLOPe POS

:SOURce IMMediate

:DISPlay [:WINDow] [:STATe] ON

:MMEMory :CATalog? not applicable

:CDIRectory not applicable

:COPY not applicable

:DELete not applicable

:INITialize not applicable

:LOAD :STATe not applicable

:STORe:STATe not applicable

:OUTPut[1][:NORMal][:STATe] OFF

:IMPedance[:INTernal] 50

:EXTernal 50.0

:POLarity NORMal

[:SOURce]:CURRent[1][:LEVel][:IMM][:AMPL] 20.0mA (from 50Ω into 50Ω)

:OFFset 0.0mA (from 50Ω into 50Ω)

:HIGH +10.0mA (from 50Ω into 50Ω)

:LOW –10.0mA (from 50Ω into 50Ω)

:LIMit[:HIGH] +10.0mA

Ω

Page 32

Programming Reference

Default Values, Standard Settings

Parameter *RST, Default Values

:LOW –10.0mA

:STATe OFF

:FREQ [:CW|:FIXed] 1.00MHz

:AUTO not applicable

:HOLD VOLT

:PHASe[1][:ADJust] 0.0

:PULSe:

:DCYCle[1] 10.0% (derived from Width and Period)

:DELay[1] 0.0

:HOLD TIME

:UNIT S

:DOUBle[1][:STATe] OFF

:DELay 250 ns

:HOLD TIME

:UNIT S

:HOLD[1] WIDTh

[:SOURce]:PULSe:PERiod 1µs

:AUTO not applicable

:TDELay[1] 100ns

:TRANsition[1|2]:HOLD TIME

:UNIT S

[:LEADing] 5.0 ns

:TRAiling 5.0 ns

:AUTO ON

:TRIGger[1]:VOLTage TTL

:WIDTh[1] 100ns

:ROSCillator:SOURce INTernal

:EXTernal:FREQ 5MHz

Page 33

Programming Reference

Default Values, Standard Settings

Parameter *RST, Default Values

[:SOURce]:VOLTage[1]

:LEVel]

[IMMediate]

[:AMPLitude] 1.0V

:OFFSet 0.0V

:HIGH 500mV

:LOW –500mV

:LIMIt[:High] +500V

:LOW –500V

:STATe OFF

:STATus: :OP ERation not applica ble

:PRESet not applicable

:QUEStionable[:EVENt]? not applicable

:CONDition? not applicable

:ENABle not applicable

:NTRansition not applicable

:PTRansition not applicable

:SYSTem :CHECk [:ALL][:STATe] ON

:ERRor? not applicable

:KEY +255

:PRESet not applicable

:SECurity[:STATe] OFF

:SET not applicable

:VERSion "1992.0

:WARNing[:COUNt]? not applicable

:STRing? not applicable

:BUFFer? not applicable

:TRIGger :COUNt 1

:IMPedance 50

Ω

Page 34

Programming Reference

Default Values, Standard Settings

Parameter *RST, Default Values

:LEVel 1.0V

:SLOPe POSitive

:SOURce IMMediate

Page 35

Programming Reference

Programming the Instrument Trigger Modes

The following figure shows the instrument’s arming/triggering model:

:ARM Event detection layer

:ARM:SOURce IMMediate (Internal VFO) INTernal2 (Internal PLL) EXTernal (EXT INPUT) Manual (MAN key)

:TRIGger Event detection layer

:TRIGger:SOURce IMMediate (Internal VFO) INTernal2 (Internal PLL) EXTernal2 (CLK IN)

:TRIGger:COUNt n

You program the comprehensive triggering capabilities of the instrument using the SCPI :ARM and :TRIGger subsystems. Using these two command subsystems you can program the operating modes of the instrument, which are set up using the M panel.

:ARM:SENSe EDGE (Triggered) LEVel (Gated)

armed?

yes

triggered?

yes

generate

pulse period and

increment counter

COUNTER = :TRIG:COUNt?

yes

reset counter

ODE/TRIGGER SCREEN

on the front

Page 36

Programming Reference

Programming the Instrument Trigger Modes

Use the :ARM subsystem to select the overall triggering mode of the instrument (CONTINUOUS, TRIGGERED, GATED, EXT WIDTH), and the :TRIGger subsystem to select the pulse period source, triggering and number of pulse periods per :ARM event (BURST or PATTERN length).

Continuous

Set Continuous mode by arming the instrument from its internal oscillator:

:ARM:SOURce IMMediate Arm from internal oscillator.

Tri gg er ed

Set Triggered mode by arming the instrument on edges from the EXT INPUT:

:ARM:SOURce EXTernal1 Arm from EXT INPUT :ARM:SENSe EDGE Arm on edge :ARM:SLOPe POSitive Arm on positive edge :ARM:LEVel 1V Set EXT INPUT threshold

You can also arm the instrument from the PLL and set the frequency (or period) of the PLL to the required triggering rate:

:ARM:SOURce INTernal2 Arm from PLL :ARM:SENSe EDGE Arm on edge :ARM:SLOPe POSitive Arm on positive edge :ARM:FREQuency <value> Set PLL frequency

NOTE The PLL (INTernal2) cannot be used as :ARM:SOURce (triggering rate) if

it is already being used as :TRIGger:SOURce (pulse period source).

Gated

Set Gated mode by arming the instrument on levels from the EXT INPUT:

:ARM:SOURce EXTernal1 Arm from EXT INPUT :ARM:SENSe LEVel Arm on signal level :ARM:SLOPe POSitive Arm on positive level

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Programming Reference

Programming the Instrument Trigger Modes

External Width

Set External Width mode using the :EWIDth[:STATe ] command:

:ARM:EWIDth ON Switch on EXT WIDTH mode

This command disables the arm-trigger system. The arm-trigger system is reenabled by switching OFF EWIDth mode.

Pulses

Set Pulses mode by setting the :TRIGger:COUNt to 1 so that a single triggered pulse period is generated for every arm event. The trigger source sets the pulse period:

:TRIGger:COUNt 1 Single pulse period per arm event :TRIGger:SOURce INTernal1 Pulse period f rom internal osc. :DIGital:PATTern OFF Disable pattern data.

Pulse period Source :TRIGger SOURce

internal OSC. internal PLL CLK-IN

INTernal[1] INTernal2 EXTernal2

NOTE The internal PLL (INTernal2) cannot be used as :TRIGger:SOURce

(pulse period source) if it is already being used as ARM:SOURce (triggering rate).

Note that in triggered pulses mode the pulse period source is not relevant because a single pulse is generated for each ARM event.

Burst

Set Burst mode by setting the :TRIGger:COUNt to the burst length required. The trigger source sets the pulse period for the pulses within the burst.

:TRIGger:COUNt 16 Burst of 16 pulse periods :TRIGger:SOURce INTernal1 Pulse period from internal osc. :DIGital:PATTern OFF Disable pattern data

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Programming Reference

SCPI Instrument Command List

The following reference sections list the instrument commands in alphabetical order. In addition to a command description, the attributes of each command are described under the following headings. Not all of these attributes are applicable to all commands. The commands are conform to the IEEE 488.2 SCPI standard.

Command Shows the short form of the command. Long Shows the long form of the command. Form Most commands can be used in different forms:

Set The command can be used to program the instrument Query The command can be used to interrogate the instru-

ment. Add a ? to the command if necessary.

Event The command performs a one-off action.

Parameter The type of parameter, if any, accepted by the command. The minimum

and maximum value of numeric parameters can be accessed by the option MINimum or MAXimum.

Parameter Suffix The suffixes that may follow the parameter.

Functional Coupling

Value Coupling Any other parameter that is also changed by the command. Range Coupling Any other parameters whose valid ranges may be changed by the

*RST value The value/state following a *RST command. Specified Limits The specified limits of a parameter. Absolute Limits Some parameters can be programmed beyond their specified limits. Example Example programming statements.

Any other commands that are implicitly executed by the command.

command.

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Programming Reference

SCPI Instrument Command List

Command :ARM:EWID

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:EWIDth[:STATe]

Form Set & Query

Parameter

*RST value

ON | OFF | 1 | 0 OFF

Description Use this command to enable the EXT WIDTH trigger mode available on

ODE/TRIGGER SCREEN

the M the

:ARM

and

:TRIG

. When EXT WIDTH mode is switched on, the rest of

system is disabled.

In EXT WIDTH mode a signal applied to the EXT INPUT determines the width and period of the output signal(s) from the instrument. You can still control the edge transition times and levels of the output signal(s).

Command :ARM:FREQ

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:FREQuency[:CW][:FIXed]

Form Set & Query Parameter Numeric

Parameter Suffix

*RST value

with engineering prefixes, e.g.:

100 kHz

MHZ

is Megahertz.

Specified Limits 1 mHz to 50 MHz Description Use this command to program the frequency of the PLL (INTernal2)

when it is used as the

:ARM:SOURce

for internal triggering of pulses,

bursts or patterns. If you are using the PLL as

use the

[:SOURce]:FREQuency[:CW|:FIXed]

:TRIGger:SOURce

to set the pulse frequency,

command.

Example To set up bursts of four 20 MHz pulses occurring at a burst rate of 2 MHz:

:TRIG:SOUR INT :FREQ 20 MHZ :ARM:SOUR INT2 :ARM:SENS EDGE :ARM:FREQ 2 MHZ :TRIG:COUNT 4

Select internal osc. as pulse period source Set pulse frequency to 20 MHz Select PLL as triggering source Sense edge of PLL signal Set triggering frequency to 2 MHz Set burst length to 4

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Programming Reference

SCPI Instrument Command List

Command :ARM:IMP

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:IMPedance

Form Set & Query Parameter Numeric

Parameter Suffix

OHM

with engineering prefixes, e.g.:

MOHM

is Megaohms.

*RST value 50 Ω Specified Limits 50 Ω or 10 kΩ Description Use this command to program the input impedance of the EXT INPUT

connector. Note that only two settings are available. If you try to program any other value, it will be rounded to one of the specified values.

Example To set up the input impedance and the triggering threshold of the EXT

INPUT connector:

:ARM:IMP 50OHM :ARM:LEV 2.5V

Set EXT INPUT impedance to 50 Set EXT INPUT threshold to 2.5 V

Ω

Command :ARM:LEV

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:LEVel

Form Set & Query Parameter Numeric

Parameter SuffixV with engineering prefixes. *RST value +1.0 V Specified Limits –10 V to +10 V Description Use this command to program the triggering threshold of the EXT INPUT

connector.

Example To set up the input impedance and the triggering threshold of the EXT

INPUT connector:

:ARM:IMP 50OHM :ARM:LEV 2.5V

Set EXT INPUT impedance to 50 Set EXT INPUT threshold to 2.5 V

Ω

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Programming Reference

SCPI Instrument Command List

Command :ARM:PER

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:PERiod

Form Set & Query Parameter Numeric

Parameter SuffixS or

SEC

with engineering prefixes.

*RST value 10.00 µs Specified Limits 20 ns to 999.5 s Description Use this command to program the period of the PLL (INTernal2) when it

is used as the

:ARM:SOURce

for internal triggering of pulses, bursts or

patterns. If you are using the PLL as

[:SOURce]:PULSe:PERiod

:TRIGger:SOURce

use the

command to set the pulse period.

Example To set up bursts of four 50 ns pulses occurring every 500 ns:

:TRIG:SOUR INT :PER 50 NS :ARM:SOUR INT2 :ARM:SENS EDGE :ARM:PER 500ns :ARM:TRIG:COUNT 4

Select internal osc.as pulse period source Set pulse period to 50 ns Select PLL as triggering source Sense edge of PLL signal Set triggering period to 500 ns Set burst length to 4

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Programming Reference

SCPI Instrument Command List

Command :ARM:SENS

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:SENSe

Form Set & Query

Parameter

*RST value

EDGE | LEVel EDGE

Description Use this command to select Triggered or Gated mode by choosing

whether the instrument arms on the edge(s) or level of the arming signal. When sensing edges, the instrument triggers when the arming signal

crosses the selected threshold level (

:ARM:SLOP

(

). This corresponds to the Triggered mode selected on the

:ARM:LEV

) in the selected direction

Mode/Trigger screen when using the front panel. When sensing levels, the instrument triggers as long as the arming signal

is above (

:ARM:SLOP POS

threshold level ( selected on the M

), or below (

:ARM:LEV

ODE/TRIGGER SCREEN

). This corresponds to the Gated mode

:ARM:SLOP NEG

) the selected

when using the front panel.

Command :ARM:SLOP

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:SLOPe

Form Set & Query

Parameter

*RST value

POSitive | NEGative | EITHer POS

Description Use this command to select the trigger slope for the arming signal when

triggering on edges. Use

EITHer

to trigger on both the positive and negative edges of the arming signal. This allows you to trigger at twice the frequency of the arming signal.

If you are arming on levels, use this command to select whether the instrument triggers during the positive or negative cycle of the arming signal.

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Programming Reference

SCPI Instrument Command List

Command :ARM:SOUR

Long

:ARM[:SEQuence[1]|STARt][:LAYer]:SOURce

Form Set & Query

Parameter

*RST value

IMMediate|INTernal[1]|INTernal2|EXTernal[1]|MANual IMM

Description Use this command to select the triggering mode of the instrument by

selecting the source of the arming signal:

Triggering Source :ARM:SOURce Mode

Internal Osc. PLL EXT INPUT MAN key

:ARM:SENSe EDGE | LEVel

Use

IMMediate|INTernal[1] INTernal2 EXTernal1 MANual

to choose between Triggered and

Continuous Triggered | Gated by PLL Triggered | Gated by EXT IN Triggered | Gated by MANKey

Gated.

Command :DISP

Long

:DISPlay[:WINDow][:STATe]

Form Set & Query

Parameter

*RST value

ON | OFF | 1 | 0 ON

Description Use this command to turn the front panel display on and off. Switching

off the display improves the programming speed of the instrument. *RST switches the display back on. Use

:SYSTem:PRESet

to perform an

*RST without switching the display back on.

Example To switch off the front panel display:

DISP OFF

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Programming Reference

SCPI Instrument Command List

Command :MMEM:CAT?

Long

:MMEMory:CATalog?

Form Query

Parameter

["A:"]

*RST value Not applicable Description Use this command to get a listing of the contents of the currently

selected directory on the memory card. As there is only one memory card slot, the parameter A: is optional. The information returned is: <bytes_used>,<bytes_free>[,<file_entry>]

<bytes_used> <bytes_free> <file_entry>

The total number of bytes used on the memory card. The total number of bytes still available on the memory card. String containing the name, type and size of one file: "<file_name>,<file_type>,<file_size>"

The <file_type> is always blank. A directory name has <file_size> = 0.

Command :MMEM:CDIR

Long

:MMEMory:CDIRectory

Form Event

Parameter

["directory_name"]

*RST value Not applicable Description Use this command to change the current directory on the memory card.

If you don't specify a directory name parameter, the root directory is selected.

Note that you cannot use DOS pathnames as directory names, you can only select a directory name within the current directory.

Use the directory name ".." to move back to the parent directory of the current directory, unless you are already in the root directory "\".

Examples To change to different directories on the memory card:

:MMEM:CDIR :MMEM:CDIR "PERFORM" :MMEM:CDIR ".."

Select root directory Select directory "PERFORM" Select parent directory

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Programming Reference

SCPI Instrument Command List

Command :MMEM:COPY

Long

:MMEMory:COPY

Form Event

Parameter

"filename"[,"A:"],"copyname"[,"A:"]

*RST Not applicable Description Use this command to copy an existing file filename in the current

directory to a new file copyname. If copyname is the name of a subdirectory in the current directory, a copy of the file filename is made in the sub-directory. Use ".." as copyname to copy a file into the parent directory of the current directory.

Examples To copy files on the memory card:

:MMEM:COPY "test1","test2" :MMEM:COPY "test1",".."

Copy test1 to test2 Copy test1 into parent directory

Command :MMEM:DEL

Long

:MMEMory:DELete

Form Event

Parameter

"filename"

*RST Not applicable Description Use this command to delete file filename from the currently selected

directory.

Command :MMEM:INIT

Long

:MMEMory:INITialize

Form Event

Parameter

["A:"[,"DOS"]]

*RST Not applicable Description Use this command to initialize a memory card to DOS format.

CAUTION Initializing a memory card destroys any existing data on the card.

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Programming Reference

SCPI Instrument Command List

Command :MMEM:LOAD:STAT

Long

:MMEMory:LOAD:STATe

Form Event

Parameter

<n>,"filename"[,"A:"]

*RST Not applicable Specified Limits <n> = 0 to 9 (integer) Description Use this command to load a complete instrument setting from file

filename in the current directory into memory <n> in the instrument. Memories 1 to 9 are the internal customer memories. Memory 0 holds the

default setting.

Examples See next command.

Command :MMEM:STOR:STAT

Long

:MMEMory:STORe:STATe

Form Event

Parameter

<n>,"filename"[,"A:"]

*RST Not applicable Specified Limits <n> = 0 to 9 (integer) Description Use this command to store a complete instrument setting from memory

<n> to file filename in the current directory on the memory card. Memories 1 to 9 are the internal memories. Use memory 0 to store the

current instrument setting to a file.

Examples To load/save instrument settings from/to the memory card:

:MMEM:LOAD:STAT 1,"FREQPERF" :MMEM:LOAD:STAT 0,"AMPTEST" :*SAV 2 :*RCL 3"

Load FREQPERF into memory 1 Load AMPTEST as current setting Save current setting in memory 2 Recall memory 3 as current setting

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Programming Reference

SCPI Instrument Command List

Command :OUTP[1]

Long

:OUTPut[1][:NORMal][:STATe]

Form Set & Query

Parameter

*RST value

ON | OFF | 1 | 0 OFF

Description Use this command to switch the normal OUTPUT on or off. Example To switch on the output:

:OUTP ON

Command :OUTP[1]:IMP

Long

:OUTPut[1]:IMPedance[:INTernal]

Form Set & Query Parameter Numeric

Parameter Suffix

OHM

with engineering prefixes, e.g.:

MOHM

is Megaohms.

*RST value 50 Ω Specified Limits 50 Ω or 1 kΩ Description Use this command to program the source impedance of the OUTPUT

connector. Note that only two settings are available. If you try to program any other value, it will be rounded to one of the specified values.

Example To program the source impedance:

:OUTP:IMP 50OHM

Set OUTPUT impedance to 50

Ω

Command :OUTP[1]:IMP:EXT

Long

:OUTPut[1]:IMPedance:EXTernal

Form Set & Query Parameter Numeric

Parameter Suffix

OHM

with engineering prefixes, e.g.:

MOHM

is Megaohms.

*RST value 50.0 Ω

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Programming Reference

SCPI Instrument Command List

Specified Limits 0.1 Ω to 1 MΩ Description Use this command to set the expected load impedance of the device

under test at the OUTPUT connectors. If you have a non-50 Ω load, the output levels at the device under test will not be the levels you program or set via the front panel unless you set the expected load using this command.

Example To set the expected load impedance:

:OUTP:IMP:EXT 47.6OHM

Set load impedance at OUTPUT to 47.6Ω

Command :OUTP[1]:POL

Long

:OUTPut[1]:POLarity

Form Set & Query

Parameter

*RST value

NORMal | INVerted NORM

Description Use this command to invert the signal at the OUTPUT. Example To invert and re-invert the signal:

:OUTP:POL INV :OUTP:POL NORM

Inverted signal at OUTPUT Normal signal at OUTPUT

Command :CURR[1]

Long

[:SOURce]:CURRent[1][:LEVel][:IMMediate][:AMPLitude]

Form Set & Query Parameter Numeric

Parameter suffixA with engineering prefixes.

*RST value 20 mA (50 Ω into 50 Ω) Specified Limits 10 V Outputs (from high Z into short): max. 400 mA typical

3.8V Outputs (50 Ω into short): max. 152 mA typical

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Programming Reference

SCPI Instrument Command List

Value coupling

Amplitude = High – Low

Offset =

High – Low

Range coupling Offset Description Use this command to program the amplitude current of the OUTPUT

signal. Note that to set the OUTPUT levels in terms of current, you first have to execute the [:SOURce]:HOLD CURRent command to enable the [:SOUR

The available current range is limited by the combination of:

• Specified Voltage limits

• Actual OUTPUT Impedance setting :OUTPut:IMPedance

• Actual Expected Load impedance setting:

Example To program the amplitude current of the output signal:

:HOLD CURR :CURR 75MA

]:CURR

:OUTPut:IMPedance:EXTernal

ENT

subsystem.

Enable CURRENT subsystem Set OUTPUT amplitude to 75 mA

Command :CURR[1]:OFFSet

Long Form Set & Query Parameter Numeric Parameter suffix A with engineering prefixes.

*RST value 0.0 µA (50 Ω into 50 Ω)

Value coupling

[:SOURce]:CURRent[1][:LEVel][:IMMediate]:OFFSet

Amplitude = High – Low

Offset =

High – Low

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Programming Reference

SCPI Instrument Command List

Range coupling Amplitude Description Use this command to program the offset current of the OUTPUT signal.

Note that to set the OUTPUT levels in terms of current, you first have to execute the [:SOURce]:HOLD CURRent command to enable the :SOURce]:CURRent subsystem.

The available current range is limited by the combination of:

• Specified Voltage limits

• Actual OUTPUT Impedance setting :OUTPut:IMPedance

• Actual Expected Load impedance setting

Example To program the offset current of the output signal:

:HOLD CURR :CURR:OFF 50MA

Enable CURRENT subsystem Set OUTPUT offset to 50 mA

Command :CURR[1]:HIGH

Long

[:SOURce]:CURRent[1][:LEVel][:IMMediate]:HIGH

Form Set & Query Parameter Numeric Parameter suffix A with engineering prefixes.

Value coupling

Amplitude = High – Low

Offset =

High – Low

Range coupling Low level *RST value +10 mA (50 Ω into 50 Ω) Specified Limits 10 V Output (from high Z into short): –396 mA to 400 mA typical

3.8 V (from 50 Ω into short): –82 mA to 152 mA typical

Description Use this command to program the high level current of the OUTPUT

signal. Note that to set the OUTPUT levels in terms of current, you first

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SCPI Instrument Command List

have to execute [:SOURCE]:HOLD CURRent command to enable the [:SOURCE]:CURRent subsystem.

The available current range is limited by the combination of:

• Specified Voltage limits

• Actual OUTPUT Impedance setting :OUTPut:IMPedance

• Actual Expected Load impedance setting:

:OUTPut:IMPedance:EXTernal

Example To program the high level current of the output signal:

:HOLD CURR :CURR:HIGH 150MA

Enable CURRENT subsystem Set OUTPUT high level to 150 mA

Command :CURR[1]:LOW

Long

[:SOURce]:CURRent[1][:LEVel][:IMMediate]:LOW

Form Set & Query Parameter Numeric

Programming Reference

Parameter suffix A with engineering prefixes. Value coupling

Amplitude = High – Low

Offset =

Range coupling High level *RST value –10 mA (50 Ω into 50 Ω) Specified Limits 10 V Outputs (from high Z into short): –400 mA to 396 mA typical

3.8 V Outputs (from 50 Ω into short): –84 mA to 150 mA typical

Description Use this command to program the low level current of the OUTPUT

signal. Note that to set the OUTPUT levels in terms of current, you first have to execute the [:SOURce]:HOLD CURRent command to enable the [:SOURce]:CURRent subsystem.

The available current range is limited by the combination of:

High – Low

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Programming Reference

SCPI Instrument Command List

• Specified Voltage limits

• Actual OUTPUT Impedance setting :OUTPut:IMPedance

• Actual Expected Load impedance setting:

:OUTPUT:IMPedance:EXTern al

Example To program the low level current of the output signal:

:HOLD CURR :CURR:LOW 50 MA

Enable CURRENT subsystem Set OUTPUT low level to 50 mA

Command :CURR[1]:LIM

Long

[:SOURce]:CURRent[1]:LIMit[:HIGH]

Form Set & Query Parameter Numeric Parameter suffix A with engineering prefixes. *RST value +10.0 mA Description Use this command to set/read the high level current limit. If you switch

on current limiting, the high level current cannot be set above the programmed limit.

The current is not limited by the OUTPUT hardware, this is a software limit.

Example To set the high level current limit for the output signal:

:HOLD CURR :CURR:LIM 50 MA :CURR:LIM:STAT ON

Enable CURRENT subsystem Set OUTPUT high level current limit to 50 mA Switch on OUTPUT limits

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Programming Reference

SCPI Instrument Command List

Command :CURR[1]:LIM:LOW

Long

[:SOURce]:CURRent[1]:LIMit:LOW

Form Set & Query Parameter Numeric

Parameter suffixA with engineering prefixes. *RST value –10.0 mA Description Use this command to set/read the low level current limit. If you switch on

current limiting, the low level current cannot be set below the programmed limit.

The current is not limited by the OUTPUT hardware, this is a software limit.

Example To set the low level current limit for the output:

:HOLD CURR :CURR:LIM:LOW –50MA :CURR:LIM:STAT ON

Enable CURRENT subsystem Set OUTPUT low level current limit to –50 mA Switch on OUTPUT limits

Command :CURR[1]:LIM:STAT

Long

[:SOURce]:CURRent[1]:LIMit:STATe

Form Set & Query

Parameter

*RST value

ON | OFF | 1 | 0 OFF

Description Use this command to switch the output limits on or off. When you switch

on the output limits, you cannot program the output levels beyond the programmed limits, until you switch off the output limits. The limits apply whether you program high/low levels or amplitude/offset levels.

NOTE You can switch the limits on and off in both the

and the

[:SOURce]:VOLTage

subsystems but the current and voltage

[:SOURce]:CURRent

limits are not enabled/disabled independently. The voltage and current limits are always enabled/disabled together.

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Programming Reference

SCPI Instrument Command List

Example To set and activate the current limits for the output:

:HOLD CURR :CURR:LIM 50MA :CURR:LIM:LOW –50MA :CURR:LIM:STAT ON

Enable CURRENT subsystem Set OUTPUT high level current limit to 50 m Set OUTPUT low level current limit to –50m Switch on OUTPUT limits

Command :FREQ

Long

[:SOURce]:FREQuency[:CW|:FIXed]

Form Set & Query Parameter Numeric

Parameter Suffix

with engineering prefixes, or

MHZ

for Megahertz.

Value coupling

Period =

Frequency

*RST value 1.00 MHz Specified limits 1 mHz to 50 MHz Description Use this command to set/read the pulse frequency. Select the frequency

source for the pulse frequency using

:TRIGger:SOURce

. The currently selected source is programmed by this command. Note that the specified limits and available resolution depend on the selected source.

You cannot set the pulse frequency if you have selected the CLK-IN connector as the frequency source (

:TRIG:SOUR EXT

Example To set the pulse frequency to 40 MHz:

:TRIG:SOUR INT :FREQ 40MHz

Select internal osc. as pulse trigger Set pulse frequency to 40 MHz

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Programming Reference

SCPI Instrument Command List

Command :FREQ:AUTO

Long

[:SOURce]:FREQuency[:CW|:FIXed]:AUTO

Form Event

Parameter

ONCE

*RST value Not applicable Description Use this command to measure the frequency at the CLK-IN connector. If

the CLK-IN connector is the selected pulse frequency source, you can then read the measured value with

:FREQ?

Example To measure and read the frequency at the CLK-IN connector:

:TRIG:SOUR EXT :FREQ:AUTO ONCE :FREQ?

Select ext CLK-IN as pulse trigger Measure frequency at CLK-IN Query pulse frequency

Command :HOLD

Long

[:SOURce]:HOLD

Form Set & Query

Parameter

*RST value Description Use this command to enable either of the

VOLTage | CURRent VOLT

[:SOURce]:CURRent

subsystems.

[:SOURce]:VOLTage

You can control the signal levels of the instrument’s OUTPUT in terms of voltage or current.

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Programming Reference

SCPI Instrument Command List

Command :PHAS[1]

Long

[:SOURce]:PHASe[1][:ADJust]

Form Set & Query Parameter Numeric

Parameter suffix

Functional coupling

DEG

Programming the pulse phase also executes

PHASe

RAD

. A parameter without a suffix is interpreted as

RAD

[:SOURce]:PULSe:HOLD

so that the pulse phase is held constant when the signal frequency

is changed.

Value coupling

Phase

360

Period

Delay =

*RST value 0.0 Specified limits 0 to 360° constrained by delay and period limits. Description Use this command to set/read the relative phase delay of the output

signal. This is equivalent to setting an absolute or percentage pulse delay

[:SOURce]:PULSe:DELay

with

If you want the phase delay to remain constant when the pulse period is varied (rather than the absolute pulse delay) use

[:SOURce]:PULSe:DELay[1]:HOLD PRATio

Example To set and hold the phase delay:

:PHAS 180 DEG :PULS:DEL:HOLD PRAT

Set OUTPUT phase to 180 Hold OUTPUT phase constant with varying period

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SCPI Instrument Command List

Command :PULS:DCYC[1]

Long Form Set & Query Parameter Numeric

Value coupling

*RST value 10.0% (derived from width and period) Specified limits 0.001% to 99.9%, depends on width, transition & period. Description Use this command to program the duty cycle of the pulse signal. If you

Example To set and hold the duty cycle:

[:SOURce]:PULSe:DCYCle[1]

Width =

want to set an absolute pulse width use If you want the pulse duty cycle to remain constant when the pulse

period is varied (rather than the absolute pulse width use)

:SOURce]:PULSe:HOLD[1] DCYCle

:PULS:DCYC 25PCT :PULS:HOLD DCYC

Duty Cycle

100

Period

[:SOURce]:PULSe:WIDTh[1]

Set OUTPUT duty cycle to 25% Hold duty cycle constant with varying period

Command :PULS:DEL[1]

Long Form Set & Query Parameter Numeric

Parameter suffixS with engineering prefixes. You can change the default unit using

Value coupling

[:SOURce]:PULSe:DELay[1]

[:SOURce]:PULSe:DELay[1]:UNIT.

Phase =

Delay

× 360

Period

Delay

Period

× 100

*RST value 0.0

Delay% =

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Programming Reference

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Specified limits 0.00 ns to 999 s (limited by period – 20 ns) Description Use this command to set/read the pulse delay. Delay is the time between

the start of the pulse period and the start of the leading edge of the pulse. If you want the pulse delay to remain constant when the pulse period is

varied (rather than the phase delay) use

[:SOURce]:PULSe:DELay[1]:HOLD TIME.

Example To set and hold the pulse delay:

:PULS:DEL 500NS :PULS:DEL:HOLD TIME

Set OUTPUT delay to 500 ns Hold OUTPUT delay constant with varying period

Command :PULS:DEL[1]:HOLD

Long

[:SOURce]:PULSe:DELay[1]:HOLD

Form Set & Query Parameter TIME | PRATio *RST value TIME Description Use this command to set/read the coupling between the pulse period and

the pulse delay:

TIME The absolute pulse delay is held fixed when the

pulse period is varied (pulse phase varies).

PRATio The pulse phase delay (delay as ratio of period) is

held fixed when the pulse period is varied (pulse delay varies).

Example To set and hold the pulse delay:

:PULS:DEL 500ns :PULS:DEL:HOLD TIME

Set OUTPUT delay to 500ns Hold OUTPUT delay constant with varying period

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Command :PULS:DEL[1]:UNIT

Long

[:SOURce]:PULSe:DELay[1]:UNIT

Form Set & Query

Parameter

*RST value

S | SEC | PCT | DEG | RAD S

Description Use this command to set/read the default units for the pulse delay

parameter. The default unit of a parameter is the unit used when the parameter is programmed to a value without a unit suffix.

Example To set the pulse delay to 50% of period:

:PULS:DEL:UNIT PCT :PULS:DEL 50

Set OUTPUT delay unit to % Set OUTPUT delay to 50% of period

Command :PULS:DOUB[1]

Long

[:SOURce]:PULSe:DOUBle[1][:STATe]

Form Set & Query

Parameter

*RST value

OFF | ON OFF

Description Use this command to switch double-pulse mode on or off. In double-

pulse mode two pulses are generated per pulse period. The delay between the leading edges of the first and second pulse can be adjusted.

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Programming Reference

SCPI Instrument Command List

Command :PULS:DOUB[1]:DEL

Long

[:SOURce]:PULSe:DOUBle[1]:DELay

Form Set & Query Parameter Numeric

Parameter suffixS with engineering prefixes. You can change the default unit using

[:SOURce]:PULSe:DOUBle:DELay[1]:UNIT.

Value coupling

DblDel% =

DblDel

× 100

Period

*RST value 0.0 Specified limits 10 ns to 999.5 s (width +10 ns) to (period – width – 10 ns)

min. period: 20 ns

Description Use this command to set/read the delay between the leading edges of the

two pulses in double-pulse mode. The first pulse always starts at the start of the pulse period.

If you want the double delay to remain constant when the pulse period is varied (rather than the double delay as percentage of period) use

[:SOURce]:PULSe:DOUBle[1]:DELay:HOLD TIME.

Example To set and hold the double-pulse delay:

:PULS:DOUB ON :PULS:DOUB:DEL 500NS :PULS:DOUB:DEL:HOLD TIME

Switch on Double pulses on OUTPUT Set interpulse delay to 500 ns Hold interpulse delay fixed with varying pulse period

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Programming Reference

SCPI Instrument Command List

Command :PULS:DOUB[1]:DEL:HOLD

Long

[:SOURce]:PULSe:DOUBle[1]:DELay:HOLD

Form Set & Query

Parameter

*RST value

TIME|PRATio TIME

Description Use this command to set/read the coupling between the pulse period and

the double-pulse delay:

TIME The absolute double-pulse delay is held fixed when the

pulse period is varied.

PRATio The double-pulse delay as percentage of period is held

fixed when the pulse period is varied.

Example To set and hold the double-pulse delay:

:PULS:DOUB ON :PULS:DOUB:DEL 50 PCT

:PULS:DOUB:DEL:HOLD PRAT

Switch on double-pulses on OUTPUT Set interpulse delay to 50% of pulse period Hold interpulse delay as fixed percentage of pulse period

Command :PULS:DOUB[1]:DEL:UNIT

Long

[:SOURce]:PULSe:DOUBle[1]:DELay:UNIT

Form Set & Query

Parameter

*RST value

S | SEC | PCT S

Description Use this command to set/read the default units for the double delay

parameter. The default unit of a parameter is the unit used when the parameter is programmed to a value without a unit suffix.

Example To set the double-pulse delay to 50%:

:PULS:DOUB:DEL:UNIT PCT :PULS:DOUB:DEL 50

Set OUTPUT double delay unit to % Set OUTPUT double-pulse delay to 50% of period

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Command :PULS:HOLD[1]

Long

[:SOURce]:PULSe:HOLD[1]

Form Set & Query

Parameter

*RST value

WIDTh | DCYCle | TDELay WIDTh

Description Use this command to set whether the pulse width, the pulse duty cycle or

the pulse trailing edge delay is held constant when the pulse period is changed.

Example To set and hold the delay and the duty cycle:

:PULS:DEL:HOLD TIME

:PULS:DEL 20NS :PULS:HOLD DCYC

:PULS:DCYC 25PCT

Hold OUTPUT delay fixed when frequency varies Set OUTPUT delay to 20ns Hold OUTPUT duty cycle fixed when frequency varies Set OUTPUT duty cycle to 25%

Command :PULS:PER

Long

[:SOURce]:PULSe:PERiod

Form Set & Query Parameter Numeric

Parameter SuffixS with engineering prefixes.

Value coupling

Frequency =

Period

*RST value 1 µ Specified limits 2 ns to 999.5 s Description Use this command to set/read the pulse period. Select the pulse period

source using

:TRIGger:SOURce.

The currently selected source is programmed by this command. Note that the specified limits and available resolution depend on the selected source.

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You cannot set the pulse period if you have selected the CLK-IN connector as the frequency source (:TRIG:SOUR EXT).

Example To set the pulse period using the internal oscillator:

:TRIG:SOUR INT :PULS:PER 25NS

Select internal osc. as pulse trigger Set pulse frequency to 25 ns

Command :PULS:PER:AUTO

Long

[:SOURce]:PULSe:PERiod:AUTO

Form Event Parameter ONCE *RST value Not applicable Description Use this command to measure the period at the CLK-IN connector. If the

CLK-IN connector is the selected pulse period source, you can then read the measured value with :PULS:PER?

Example To measure the period at the CLK-IN connector:

:TRIG:SOUR EXT :PULS:PER:AUTO ONCE :PULS:PER?

Select ext. CLK-IN as pulse trigger Measure period at CLK-IN Query pulse period

Command :PULS:TDEL[1]

Long

[:SOURce]:PULSe:TDELay[1]

Form Set & Query Parameter Numeric Parameter Suffix S with engineering prefixes. *RST value 100 ns Specified Limits 10 ns to 999.5 s (max. period –10 ns) Description Use this command to program the delay of the trailing edge of the pulse

relative to the start of the pulse period. This is an alternative method of programming the pulse width.

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Example To program the pulse width by means of the delay parameters:

:PULS:DEL 500NS :PULS:DEL:HOLD TIME

:PULS:TDEL 750NS

Set OUTPUT delay to 500 ns Hold OUTPUT delay constant with varying period Set OUTPUT trailing delay to 750 ns

Command :PULS:TRAN[1]:HOLD

Long

[:SOURce]:PULSe:TRANsition[1]:HOLD

Form Set & Query

Parameter

*RST value

TIME | WRATio TIME

Description Use this command to set the coupling between transition times and the

pulse width:

TIME

The absolute transition times are held when the pulse width is varied.

WRATio

The ratio of transition time to pulse width is held when the pulse width is varied.

Example To set the coupling between transition times and the pulse width:

:PULS:TRAN:HOLD TIME

:PULS:TRAN:HOLD WRAT

Hold OUTPUT transitions fixed when pulse width varies Hold OUTPUT transition width ratio when pulse width varies

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Programming Reference

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Command :PULS:TRAN[1]:UNIT

Long

[:SOURce]:PULSe:TRANsition[1]:UNIT

Form Set & Query

Parameter

*RST value

S | SEC | PCT S

Description Use this command to set the default units for the pulse transition times.

The default unit is used when the parameter is programmed to a value without a unit suffix.

Command :PULS:TRAN[1]

Long

[:SOURce]:PULSe:TRANsition[1][:LEADing]

Form Set & Query Parameter Numeric

Parameter suffixS with engineering prefixes, or

PCT

*RST value 5ns Specified limits 5ns to 200ms

Parameter coupling

By default: Trailing edge = Leading edge with

:PULS:TRAN:TRA:AUTO OFF

Use

to enable independent programming

:PULS:TRAN:TRA:AUTO

of the trailing edge within a 1:20 ratio for the ranges.

Description Use this command to set/read the transition time of the pulse leading

edge. Note that the leading and trailing edges of the pulse have to fit within the defined pulse width.

Example To set leading and trailing edges independently:

:PULS:TRAN1 6NS :PULS:TRAN:TRA:AUTO OFF

:PULS:TRAN:TRA 15 NS

Set OUTPUT leading edge to 6 ns Enable independent setting of trailing edge Set OUTPUT trailing edge to 15 ns

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Programming Reference

SCPI Instrument Command List

Command :PULS:TRAN[1]:TRA

Long

[:SOURce]:PULSe:TRANsition[1]:TRAiling

Form Set & Query Parameter Numeric

Parameter suffixS with engineering prefixes, or PCT *RST value 5ns Specified limits 5 ns to 200 ms

Parameter coupling

By default: Trailing edge = Leading edge with

:PULS:TRAN:TRA:AUTO OFF

Use

to enable independent programming

:PULS:TRAN:TRA:AUTO

of the trailing edge within a 1:20 ratio for the ranges.

Description Use this command to set/read the transition time of the pulse trailing-

edge. Note that the leading and trailing edges of the pulse have to fit within the defined pulse width.

Example To set the leading and trailing edges independently:

:PULS:TRAN 6NS :PULS:TRAN:TRA:AUTO OFF

:PULS:TRAN:TRA: 15NS

Set OUTPUT leading edge to 6ns Enable independent setting of trailing edge Set OUTPUT trailing edge to 15 ns

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Programming Reference

SCPI Instrument Command List

Command :PULS:TRAN[1]:TRA:AUTO

Long

:[SOURce]:PULSe:TRANsition[1]:TRAiling:AUTO

Form Set & Query

Parameter

*RST value

ON|OFF|ONCE ON

Description Use this command to set/read the automatic coupling of the pulse trailing

edge transition time to the leading edge transition time.

ON The trailing edge transition time is automatically

set to the same value as the leading edge, and is updated automatically each time the leading edge transition time changes.

OFF The trailing edge transition time is independently

programmable.

ONCE The trailing edge transition time is set ONCE to

the same value as the leading edge.

Example To set leading and trailing edges independently:

:PULS:TRAN 6NS :PULS:TRAN:TRA:AUTO OFF

:PULS:TRAN:TRA 15NS

Set OUTPUT leading edge to 6 ns Enable independent setting of trailing edge Set OUTPUT trailing edge to 15 ns

Command :PULS:TRIG[1]:VOLT

Long

[:SOURce]:PULSe:TRIGger[1]:VOLTage[:LEVel][:IMMediate] [:AMPlitude]

Form Set & Query

Parameter

*RST value

TTL | ECL TTL

Description Use this command to set/read the output levels at the TRIGGER OUT

connector.

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Programming Reference

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Command :PULS:WIDT[1]

Long

[:SOURce]:PULSe:WIDTh[1]

Form Set & Query Parameter Numeric

Parameter suffixS with engineering prefixes *RST value 100 ns Specified limits 10 ns to 999.5 s (max. period –10 ns) Description Use this command to program the width of the pulse signal. If you want

to set width as duty cycle use

[:SOURce]:PULSe:DCYCle[1]

If you want the pulse width to remain constant when the pulse period is varied (rather than the duty cycle) use

[:SOURce]:PULSe:HOLD[1] WIDTh

Example To set and hold the pulse width:

:PULS:WIDT 50NS :PULS:HOLD WIDTH

Set OUTPUT pulse width to 50 ns Hold pulse width constant with varying period

Command :ROSC:SOUR

Long

[:SOURce]:ROSCillator:SOURce

Form Set & Query

Parameter

*RST value

INTernal | EXTernal INT

Description Use this command to set/read the reference source for the PLL. If you

select the external reference (CLK-IN connector), you can choose to use a 5 MHz or 10 MHz reference signal using

INTernal EXTernal

Lock the PLL to a reference signal at the

Lock the PLL to its internal reference

:ROSC:EXT:FREQ

CLK-IN connector. The external reference signal can be 5 or 10 MHz.

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Programming Reference

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Example To set up the external PLL reference:

:ROSC:SOUR EXT :ROSC:EXT:FREQ 10 MHZ

Set external PLL reference (CLK-IN) Set expected PLL reference frequency to 10 MHz

Command :ROSC:EXT:FREQ

Long

[:SOURce]:ROSCillator:EXTernal:FREQuency

Form Set & Query Parameter Numeric *RST value 5 MHz Specified limits 5 MHz or 10 MHz Description Use this command to set/read the expected reference frequency for the

PLL at the CLK-IN connector. The external reference can be a 5 or 10 MHz signal. Note that if you program any value other than the two specified values, the value will be set to the nearest of the two specified values.

Example To set up the external PLL reference:

:ROSC:SOUR EXT :ROSC:EXT:FREQ 10MHZ

Set external PLL reference (CLK-IN) Set expected PLL reference frequency to 10 MHz

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Programming Reference

SCPI Instrument Command List

Command :VOLT[1]

Long Form Set & Query Parameter Numeric

Parameter suffixV with engineering prefixes.

Value coupling

[:SOURce]:VOLTage[1][:LEVel][:IMMediate][:AMPLitude]

High = Offset +

Amplitude

Low = Offset

–

Amplitude

Range coupling With Offset, see page 71 *RST value 1.00 V Specified limits 100 mVpp to 10.0 Vpp (values are valid from 50 Ω into 50 Ω) Description Use this command to program the amplitude voltage of the output signal.

Note that to set the output levels in terms of voltage, you first have to execute the

[:SOURce]:VOLTage

The available voltage range is limited by the combination of:

• Specified current limits

• Actual output impedance setting

• Actual expected load impedance setting:

:OUTput:IMPedance:EXTern al

Example To set the amplitude voltage:

:HOLD VOLT :VOLT 5V

[:SOURce]:HOLD VOLTage

subsystem.

:OUTPut:IMPedance

Enable VOLTAGE subsystem Set OUTPUT amplitude to 5 V

command to enable the

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Programming Reference

SCPI Instrument Command List

Command :VOLT[1]:OFFSet

Long Form Set & Query Parameter Numeric

Parameter suffixV with engineering prefixes.

Value coupling

[:SOURce]:VOLTage[1][:LEVel][:IMMediate]:OFFSet

High = Offset +

Amplitude

Low = Offset –

Amplitude

Range coupling With Amplitude, see page 70 *RST value 0.0 mV Specified Limits –10 V to +10 V Description Use this command to program the offset voltage of the OUTPUT signal.

Note that to set the OUTPUT levels in terms of voltage, you first have to execute the

[:SOURce]:VOLtage

[:SOURce]:HOLD VOLTage

subsystem.

command to enable the

The available voltage range is limited by the combination of:

• Specified current limits

• Actual OUTPUT impedance setting

• Actual expected load impedance setting

:OUTput:IMPedance:EXTernal

Example To set the offset voltage:

:HOLD VOLT :VOLT:OFF –800MV

:OUTPut:IMPedance

Enable VOLTAGE subsystem Set OUTPUT offset to –800mV

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SCPI Instrument Command List

Command :VOLT[1]:HIGH

Long

[:SOURce]:VOLTage[1][:LEVel][:IMMediate]:HIGH

Form Set & Query Parameter Numeric

Parameter suffixV with engineering prefixes.

Value coupling

Amplitude = High – Low Offset =

High – Low

Range coupling With low level, see page 73 *RST value 500 mV Specified limits –9.9 V to 10.0 V (50 Ω into 50 Ω) Description Use this command to program the high level voltage of the OUTPUT

signal. Note that to set the OUTPUT levels in terms of voltage, you first have to execute the

[:SOURce]:VOLTage

[:SOURce]:HOLD VOLTage

subsystem.

command to enable the

The available voltage range is limited by the combination of:

• Specified current limits

• Actual OUTPUT impedance setting

• Actual expected load impedance setting

:OUTPut:IMPedance:EXTern al

Example To set the high level voltage:

:HOLD VOLT :VOLT:HIGH 4.8V

:OUTPut:IMPedance

Enable VOLTAGE subsystem Set OUTPUT high level voltage to 4.8 V

Page 73

Command :VOLT[1]:LOW

Long Form Set & Query Parameter Numeric

Parameter suffixV with engineering prefixes.

Value coupling

[:SOURce]:VOLTage[1][:LEVel][:IMMediate]:LOW

Amplitude = High – Low

Programming Reference

SCPI Instrument Command List

Offset =

High–Low

Range coupling With high level, see page 72 *RST value –500 mV Specified limits –10.0 V to 9.9 V (50 Ω into 50 Ω) Description Use this command to program the low level voltage of the OUTPUT

signal. Note that to set the OUTPUT levels in terms of voltage, you first have to execute the

[:SOURce]:VOLTage

The available voltage range is limited by the combination of:

• Specified current limits

• Actual OUTPUT impedance setting

• Actual expected load impedance setting

:OUTPut:IMPedance:EXTernal

Example To set the low level voltage:

:HOLD VOLT :VOLT:LOW 500MV

[:SOURce]:HOLD VOLTage

subsystem.

:OUTPut:IMPedance

Enable VOLTAGE subsystem Set OUTPUT low level to 500mV

command to enable the

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Programming Reference

SCPI Instrument Command List

Command :VOLT[1]:LIM

Long

[:SOURce]:VOLTage[1]:LIMit[:HIGH]

Form Set & Query Parameter Numeric

Parameter suffixV with engineering prefixes. *RST value +500 mV Description Use this command to set/read the high level voltage limit. If you switch

on voltage limiting, the high level voltage cannot be set above the programmed limit. Note that the voltage is not limited by the OUTPUT hardware, this is a software limit.

Example To set and activate the high level voltage limit:

:HOLD VOLT :VOLT:LIM 3V :VOLT:LIM:STAT ON

Enable VOLTAGE subsystem Set OUTPUT high level limit to 3 V Switch on OUTPUT limits

Command :VOLT[1]:LIM:LOW

Long

[:SOURce]:VOLTage[1]:LIMit:LOW

Form Set & Query Parameter Numeric

Parameter suffixV with engineering prefixes. *RST value –500 mV Description Use this command to set/read the low level voltage limit. If you switch on

voltage limiting, the low level voltage cannot be set below the programmed limit. Note that the voltage is not limited by the OUTPUT hardware, this is a software limit.

Example To set and activate the low level limit:

:HOLD VOLT :VOLT:LIM:LOW 0V :VOLT:LIM:STAT ON

Enable VOLTAGE subsystem Set OUTPUT low level voltage Switch on OUTPUT limits

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Programming Reference

SCPI Instrument Command List

Command :VOLT[1]:LIM:STAT

Long

[:SOURce]:VOLTage[1]:LIMit:STATe

Form Set & Query

Parameter

*RST value

ON | OFF | 1 | 0 OFF

Description Use this command to switch the output limits on or off. When you switch

on the output limits, you cannot program the output levels beyond the programmed limits, until you switch off the voltage limits. The limits apply whether you program high/low levels or amplitude/offset levels.

NOTE You can switch the limits on and off in both the

and the

[:SOURce]:VOLTage

subsystems but the current and voltage

[:SOURce]:CURRent

limits are not enabled/disabled independently. The voltage and current limits are always enabled/disabled together.

Example To set and activate the high and low voltage limits:

:HOLD VOLT :VOLT:LIM 3V :VOLT:LIM:LOW 0V :VOLT:LIM:STAT ON

Enable VOLTAGE subsystem Set OUTPUT high level voltage limit to 3 V Set OUTPUT low level voltage limit to 0 V Switch on OUTPUT limits

Command :STATus:OPERation

This command tree accesses the

OPERation

status group is not used by the instrument. Therefore, this

OPERation

status group. The

command tree is redundant.

:STATus:OPERation[:EVENt]?

•

:STATus:OPERation:CONDition?

•

:STATus:OPERation:ENABle

•

:STATus:OPERation:NTRansition

•

:STATus:OPERation:PTRansition

•

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Programming Reference

SCPI Instrument Command List

Command :STATus:PRESet

Long

:STATus:PRESet

Form Event *RST value Not Applicable Description This command

• Clears all status group event registers

• Clears the error queue

• Presets the status group enable-, PTR-, and NTR-registers as follows:

Status Group Register Preset value

OPERation ENABle

PTR NTR

QUEStionable ENABle

PTR NTR

Command :STATus:QUEStionable

This command tree accesses the QUEStionable status group. The QUEStionable status group contains warning bits for voltage, current, time and frequency parameters. A warning occurs when the output signal could be out of specification due to the combined specification uncertainties of many parameters, although all parameters are set within their individually specified limits. If a parameter is set outside its specified limits an error is generated.

The following commands are used to access the registers within the status group:

0000000000000000 0111111111111111 0000000000000000 0000000000000000 0111111111111111 0000000000000000

Page 77

1. :STATus:QUEStionable[:EVENt]?

Form *RST value Description

Query Not Applicable This command reads the event register in the QUEStionable status group.

2. :STATus:QUEStionable:CONDition?

Form *RST value Description

Query Not Applicable This command reads the condition register in the QUEStionable status group.

3. :STATus:QUEStionable:ENABle

Form Parameter *RST value Specified limits Description

Set & Query Numeric Not affected by *RST'' 0 – 32767

This command sets or queries the enable register in the QUEStionable status group.

4. :STATus:QUEStionable:NTRansition

Form Parameter *RST value Specified limits Description

Set & Query Numeric Not applicable' 0 – 32767

This command sets or queries the negative transition register in the QUEStionable status group.

Programming Reference

SCPI Instrument Command List

5. :STATus:QUEStionable:PTRansition

Form Parameter *RST value Specified limits Description

Set & Query Numeric Not applicable' 0 – 32767

This command sets or queries the positive transition register in the QUEStionable status group.

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Programming Reference

SCPI Instrument Command List

Command :SYST:CHEC

Long

:SYSTem:CHECk[:ALL][:STATe]

Form Set & Query

Parameter

*RST value

OFF | ON ON

Description Use this command to switch the instrument’s error checking on or off.

Switch off the error checking if you want to improve the programming speed of the instrument, but remember that no invalid parameter or mode settings will be detected and reported. Error checking is switched off by the *RST command, or when default setting is invoked.

CAUTION Error checking cannot be switched on from the front panel. Error

checking is not automatically re-enabled if you switch the instrument off and on again. Therefore your test programs should send either *RST or set default setting before ending.

Command :SYST:ERR?

Long

:SYSTem:ERRor?

Form Query *RST value Not Applicable Description Use this command to read the instrument error queue. The instrument

error queue can store up to 30 error codes on a first-in-first-out basis. When you read the error queue, the error number and associated message are put into the instrument’s output buffer.

If the queue is empty, the value 0 is returned, meaning N

O ERROR

. If the queue overflows at any time, the last error code is discarded and replaced with –350 meaning Q

UEUE OVERFLOW

Example To read the error queue:

Example Error String

:SYS:ERR?

–222 "Data out of range" overlap at output 1: Width>Double Delay

Query for errors

Page 79

The above message is an example of a customized description. Generic descriptions are available in the SCPI 1995 Command Reference, items

21.8.4 to 21.8.11. For more detailed information in the 81110A error. Send ":SYST:WARN:STR?". Alternatively, the HELP key shows the

current errors and warnings and their description on the instruments display.

Command :SYST:KEY

Long

:SYSTem:KEY

Form Set & Query Parameter Numeric Parameter suffix No suffix allowed *RST value –1

Specified limit

Programming Reference

SCPI Instrument Command List

No. Key Description

–1 No key pressed (Query only) 0 DATA ENTRY 0 1 DATA ENTRY 1 2 DATA ENTRY 2 3 DATA ENTRY 3 4 DATA ENTRY 4 5 DATA ENTRY 5 6 DATA ENTRY 6 7 DATA ENTRY 7 8 DATA ENTRY 8 9 DATA ENTRY 9 10 DATA ENTRY .

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Programming Reference

SCPI Instrument Command List

No. Key Description

11 DATA ENTRY +/– 12 Cursor Up 13 Cursor Down 14 Cursor Left 15 Cursor Right 16 MAN 17 STORE 18 HELP 19 SHIFT 20 MORE 21 Softkey 1 22 Softkey 2 23 Softkey 3 24 Softkey 4 25 26 27

NANO

MICRO/MEGA

MILLI/KILO

28 ENTER 29 Modify Knob Left (counter-clockwise) 30 Modify Knob Right (clockwise)

Description In query form, this command reads the last key pressed. The buffer is

emptied by *RST and returns the value –1 when empty. In set form, the command simulates pressing a key on the front panel.

Simulated key press are also recorded as the last key pressed. :SYST:KEY 19 sets the instrument to LOCAL mode.

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SCPI Instrument Command List

• In remote mode only the softkeys below the display and the S (LOCAL) key are active. Because the instrument normally switches to remote mode when any command is received, including :SYSTem:KEY, simulating one of the other disabled keys has no effect.

• If you want to simulate full front panel operation, you must prevent the instrument from entering remote mode by using the REN line of the HP-IB to maintain local mode (LOCAL 7 in BASIC).

If you do this, the :SYSTem:KEY command is the only command that works. Any other commands will be buffered in the instrument blocking any further :SYSTem:KEY commands, until remote mode is enable.

Command :SYST:PRES

Long

:SYSTem:PRESet

Form No function.

HIFT

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Programming Reference

SCPI Instrument Command List

Command :SYST:SEC

Long

:SYSTem:SECurity[:STATe]

Form Set & Query

Parameter

*RST value

ON|OFF OFF

Description

CAUTION Do not switch on system security unless you are willing to erase the

instrument settings stored in the instrument. All instrument memories, including the current setting, will be overwritten with the default settings if you

• switch off system security

• switch the instrument off and on again

If you accidentally switch on system security, and want to rescue the settings stored in the instrument, store the settings on a memory card.

You can then recall them from the memory card later.

Use this command to switch on system security mode. Switch on system security if you need to make sure that all instrument settings stored in the instrument are erased automatically when the instrument is switched off, or when security mode is switched off.

The instrument settings are erased by overwriting them with the default settings.

System security mode is not available via the front panel. If you want to erase all settings by hand:

1 SHIFT + STORE (RECALL) + 0 to recall the default settings from memory

location 0.

2 STORE + 1, STORE + 2, ... STORE + 9, to store the defaults in memory

locations 1 to 9.

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Programming Reference

SCPI Instrument Command List

Command :SYST:SET

Long

:SYSTem:SET

Form Set & Query Parameter Block data *RST value Not applicable Description In query form, the command reads a block of data containing the

instrument’s complete setup. The set-up information includes all parameter and mode settings, but does not include the contents of the instrument setting memories, the status group registers or the

:DISPlay[:WINDow][:STATe]

The data is in a binary format, not

ASCII, and cannot be edited. In set form, the block data must be a complete instrument setup read

using the query form of the command.

Command :SYST:VERS?

Long

:SYSTem:VERSion?

Form Query *RST value "1992.0" Description Use this command to read the SCPI revision to which the instrument

complies.

Command :SYST:WARN?

Long

:SYSTem:WARNing[:COUNt]?

Form Query *RST value Not applicable Description Use this command to read the number of warnings which are currently

active. Note that the warning status of voltage, current, time and frequency are also summarized by bits in the QUESTionable Status register.

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Programming Reference

SCPI Instrument Command List

Command :SYST:WARN:STR?

Long

:SYSTem:WARNing:STRing?

Form Query *RST value Not applicable Description Use this command to read all the currently active warning messages. The

warning messages are concatenated to form a single string with a “;” as separator between the messages.

Command :SYST:WARN:BUFF?

Long

:SYSTem:WARNing:BUFFer?

Form Query *RST value Not applicable Description Use this command to read the maximum possible number of characters

that could be returned by

:SYST:WARN:STR?

if all warnings were active.

Command :TRIG:COUNt

Long

:TRIGger[:SEQuence[1]]:COUNt

Form Set & Query Parameter Numeric *RST value 1 Specified limits 1 to 65 536 Description Use this command to set/read the number of trigger events (pulse

periods) to be generated for each arming event. This corresponds to selecting the event mode on the M

PULSES

BURST of

Set a

trigger count to 1

each arming event. The instrument is in pulse (stream) mode. Set a

trigger count of 2 to 65536

periods is generated for each arming event.

ODE/TRIGGER SCREEN

so that a single pulse period is generated for

so that a burst of 2 to 65536 pulse

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Programming Reference

SCPI Instrument Command List

Examples To set up a triggered burst of 16 Single Pulses at Out1, each burst

triggered by a positive edge at the EXT INPUT:

:ARM:SOUR EXT1 :ARM:SENS EDGE :ARM:SLOP POS :TRIG:COUN 16 :TRIG:SOUR INT1 :DIG:PATT OFF :PULS:DOUB OFF

Set arming from EXT INPUT Set arming on edges Set arming on positive edges Burst length 16 Pulse period trigger from internal osc. Disable pattern operating mode Ensure single pulses at OUTPUT

To set up gated pulses (Single Pulses at Out1), gated by a positive level at the EXT INPUT:

:ARM:SOUR EXT1 :ARM:SENS LEV :ARM:SLOP POS :TRIG:COUN 1 :TRIG:SOUR INT1 :DIG:PATT OFF :PULS:DOUB OFF

Set arming from EXT INPUT Set arming on levels Set arming on positive level 1 pulse period Single pulse output mode Pulse period trigger from internal osc. Disable pattern data Ensure single pulses at OUTPUT

Command :TRIG:IMP

Long

:TRIGger:IMPedance

Form Set & Query Parameter Numeric

Parameter Suffix

OHM

with engineering prefixes, e.g.:

MOHM

is Megaohms.

*RST value 50 Ω Specified Limits 50 Ω or 10 kΩ Description Use this command to program the input impedance of the CLK-IN

connector. Note that only two settings are available. If you try to program any other value, it will be rounded to one of the specified values.

Example To set the input impedance and the threshold of the CLK-IN connector:

:TRIG:IMP 50OHM :TRIG:LEV 2.5V :TRIG:SOUR EXT2

Set CLK-IN impedance to 50 Set CLK-IN threshold to 2.5V Pulse period trigger from CLK-IN

Ω

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Programming Reference

SCPI Instrument Command List

Command :TRIG:LEV

Long

:TRIGger:LEVel

Form Set & Query Parameter Numeric

Parameter SuffixV with engineering prefixes. *RST value 1.0 V Specified Limits –10 V to +10 V Description Use this command to program the triggering threshold of the CLK-IN

connector.

Example To set the input impedance and the threshold of the CLK-IN connector:

:TRIG:IMP 50OHM :TRIG:LEV 2.5V :TRIG:SOUR EXT2

Set CLK-IN impedance to 50 Set CLK-IN threshold to 2.5V Pulse period trigger from CLK-IN

Ω

Command :TRIG:SLOP

Long

:TRIGger:SLOPe

Form Set & Query

Parameter

*RST value

POSitive | NEGative POS

Description Use this command to select the trigger slope for the pulse period

triggering signal applied to the CLK-IN connector.

Command :TRIG:SOUR Long :TRIGger:SOURce Form Set & Query

Parameter

*RST value

IMMediate | INTernal[1] | INTernal2 | EXTernal2 IMM

Description Use this command to select the pulse period source of the HP81101A by

selecting the source of the pulse period trigger signal:

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SCPI Instrument Command List

Pulse period sources set by :TRIG:SOUR

Pulse period source :TRIG:SOURce

Programming Reference

internal osc internal PLL CLK-IN

IMMediate INTernal[1] INTernal2 EXTernal2

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Programming Reference

SCPI Instrument Command List

Page 89

3Specifications

In this chapter you will find the specifications of the HP 81101A Pulse Generator.

At the end of this chapter, “Pulse Parameter Definitions” on page 105 provides detailed information on the definition of the pulse parameters used by the instrument.

NOTE

Warranted Performance

Specifications describe the instrument’s warranted performance. Nonwarranted values are described as typical. All specifications apply after a 30 minute warm-up phase with 50 Ohm source, a 50 Ohm load resistance and separate channels. They are valid from 0 °C to 55 °C ambient temperature.

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Specifications

Declaration of Conformity

Manufacturer Hewlett-Packard GmbH

Boeblingen Instruments Division Herrenberger Str.110–140

D-71034 Boeblingen, Germany We declare that the system:

HP 81100 Family of Pulse-/Data Generators HP 81101A 50 MHz Pulse Generator

conforms to the following standards:

Safety Standard IEC 1010-1:1990 +A1:1992EN61010-1:1993 EMC Standard EN 55011:1991 / CISPR 11 Group 1, Class B

EN 61000-4-2:1995 ESD: 4kVcd; 8 kVad;4kV c.p. EN 61000-4-3:1995 Radiated Immunity: 3V/m 80%AM ENV 50204: 1995 Radiated Immunity: 3V/m;50%Dty EN 61000-4-4:1995 Fast Transients/Bursts: 0.5kV, 1kV EN 61000-4-5:1995 Surges: 1kVdiff; 2kV com.mode EN 61000-4-6:1995 Conducted Immunity EN 61000-4-8:1993 Power freq. magn. field 3A/m;50Hz IEC1000-4-11:1994 Voltage Dips and Interruptions

Supplementary Information

The product herewith complies with the requirements of the

•

Low Voltage Directive (73/23/EEC) and the

•

EMC Directive (89/336/EEC).

During the measurements against EN55011, the I/O ports were terminated with their nominal impedance, the HP-IB connection was terminated with the cable HP 10833B.

When the product is connected to other devices, the user must ensure that the connecting cables and the other devices are adequately shielded to prevent radiation.

Boeblingen, June 09th 1998 Wolfgang Fenske

Regulation Consultant

Page 91

Specifications

HP 81101A Specifications

General

Environmental Conditions

Operating temperature: 0°C to +55°C

Storage temperature: –40°C to +70°C

Humidity: 95% r.h. up to 40°C ambient temperature

Altitude: up to 2000 m

Installation: Category II

Pollution: Degree 2

EMC: conforms to EN50082-1, EN55011, Class B

Battery: Lithium, type CR2477-N

(HP part number 1420-0557)

Safety

IEC1010, CSA1010

Power requirements

100–240 Vac, ±10%, 50–60 Hz; 100–120 Vac, ±10%, 400 Hz Power consumption: 300 VA max.

Maximum Dimensions (H x W x D)

89 mm x 426 mm x 521 mm

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Specifications

HP 81101A Specifications

Weight

Net

8.5 kg Single Channel

9.2 kg Dual Channel

Shipping

13.8 kg Dual Channel

Recalibration period

1 year recommended

Warranty

3 years standard

Acoustic Noise Emission

For ambient temperature up to 30°C, under normal operation and at the typical operator position:

LpA = 52 dB (5.9 bel) typical {47 dB (5.3 bel) at 23°C) typical} Measured in accordance with ISO 7779/EN 27779.

Page 93

Timing Specifications

Period

Period can also be entered as frequency.

Specifications

HP 81101A Specifications

Period

Range: 20 ns to 999.5 s

Resolution: 3.5 digits, 5 ps best case for VFO

Accuracy: PLL: ±0.01%

Repeatability: typically 4 times better than accuracy

RMS-jitter: PLL: 0.001% + 15 ps

Frequency range: 1.00 mHz to 50 MHz

HP 81101A

4 digits, 1 ps best case for PLL

VFO: ±5%

VFO: 0.01% + 15 ps

There are 2 period generation sources available:

• startable oscillator (variable frequency oscillator VFO)

• high-accuracy frequency generator (PLL)

Glitch-free timing changes

You can sweep your timing values without danger of spurious pulses or drop outs that could cause measurement errors. This applies to continuous mode with timing values < 100 ms (frequency: < 10 Hz), and consecutive values between one-half and twice the previous value.

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Specifications

HP 81101A Specifications

Width

Can be entered as absolute width, duty cycle or trailing edge delay.

Width HP 81101A

Range: 10 ns to 999.5 s

Accuracy:

Duty cycle: 0.1% to 95% (depends on period and width;

Duty cycle values from 0.1% to 95% can be entered directly. For values >95 % press SHIFT and use the Modify knob. Note that pulses may be deteriorated or skipped due to the inaccuracy of period and width. Hence for large values, it is better to select complement and enter 100 minus the required duty cycle value.

Delay

Measured between trigger output and main output. Can be entered as absolute delay, phase ° or % of period.

(max value: period –10 ns)

5% ±250 ps

overprogrammable to 99%)

Delay HP 81101A

Fixed delay from TRIGGER OUT:

Additional variable range: 0.00 ns to 999.5 s

Accuracy:

17.0 ns typical

(max value: period –20 ns)

5% ±1 ns

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Specifications

HP 81101A Specifications

Double Pulse Delay

Double pulse delay and delay are mutually exclusive. Double Pulse delay is the delay between the two pulses in Double Pulse mode.

Double Pulse Delay HP 81101A

Double Pulse Delay range:

Accuracy: ±5 % ±500 ps

Min. period: 40 ns (25 MHz)

20 ns to 999.5 s (width + 10 ns) to (period – width – 10 ns)

Tra ns it io n Tim e s

Measured between 10% and 90% of amplitude. Can be entered as leading/ trailing edge or % of width.

Transition Times HP 81101A

Range: 5.00 ns to 200 ms

Min. transition: 5.0 ns

7.5 ns typical for 1 kΩ source impedance

Accuracy: ±10% ±200 ps

Linearity: 3% typical for transitions >100 ns

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Specifications

HP 81101A Specifications

Leading and trailing edges can be programmed independently within the following ranges (Maximum ratio 1:20):

5ns

Level Specifications

Level Parameters HP 81101A

Source impedance: selectable 50Ω ± 1% typical or 1 kΩ

Maximum external voltage: ±24 V

Short circuit current: ±400 mA

Normal/complement: selectable

ON/OFF: relay connect/disconnect output (HiZ).

Limits: high and low levels can be limited to protect the

DUT

External Load compensation

For loads ≠ 50Ω, the actual load impedance can be entered to correct the output values.

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Specifications

HP 81101A Specifications

Level Parameters

Level parameters can be entered as high/low level in terms of voltage or current or offset/amplitude.

Level Specifications (50Ω into 50Ω) (1k

Amplitude: 100 mVpp to 10.0 Vpp 200 mVpp to 20.0 Vpp

Level Window –10.0 V to +10.0 V –20.0 V to + 20.0 V

Level Accuracy

19 V level window):

(in +

Resolution: 10 mV 20 mV

(3% Amplitude + 75 mV) +(3% Amplitude + 150 mV)

Ω

into 50Ω)

Pulse Performance

Pulse Performance HP 81101A

Overshoot, Preshoot, Ringing: +

Settling time: 30 ns typical

Baseline noise: 8 mV RMS typical

Dynamic Crosstalk < 0.1% typical

5% of amplitude ±20 mV

Clock Sources

It is possible to select between three clock sources, the startable oscillator (VFO), the internal PLL, or the External Clock. In Triggered Mode the PLL can be used as the trigger source for the VFO, without the need of an additional source.

Page 98

Specifications

HP 81101A Specifications

Clock / PLL Reference Input

Input Specifications HP 81101A

Input impedance: 50Ω or 10kΩ selectable

Threshold: –10 V to +10 V

Maximum input voltage: +

Input transitions: <100 ns

Input Frequency: dc to max 50 MHz

Minimum pulse width: 10 ns

Input sensitivity: <

Delay from Clock Input to TRIGGER OUT/ STROBE OUT:

Rear panel BNC connector used as:

External system clock input: pulse frequency = input frequency.

•

The input frequency can be measured. 5 MHz or 10 MHz frequency reference input for internal PLL.

•

15 V

300 mVpp typical

12 ns typical

Phase Locked Loop (PLL)

Locks either to an external frequency reference at the PLL Ref Input

•

Clk In (5 MHz or 10 MHz selectable) or to its internal reference. High accuracy period (frequency) source.

•

When locked to the internal reference, period accuracy, resolution, and jitter are improved. When locked to an external frequency reference, the external frequency affects these accuracies.

Internal triggering of bursts: the internal PLL can replace an external

•

trigger source, while the output period is determined by the startable oscillator.

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Specifications

HP 81101A Specifications

External Clock

The output period is determined by the signal at clock input.

•

Frequency accuracy can be increased by using a precise external clock.

Trigger synchronously to external clock: the output period is

•

synchronous to the signal at clock input. The signal at the External Input is used for arming.

Output Modes

Pulses Mode

The output signal consists of single or double pulses, controlled by the Trigger mode.

Burst Mode

The output signal consists of bursts of single or double pulses, controlled by the Trigger mode.

Burst Parameters HP 81101A

Burst count: 2 to 65536

Format: single or double pulses

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Specifications

HP 81101A Specifications

Trigger Modes

Continuous

Generate continuous pulses, double pulses, or bursts.

Externally Triggered

Each active input transition (rising, falling or both) triggers a single pulse, a double pulse, or a burst.

The trigger source can be selected from:

• External Input

• MAN Trigger key

• internal PLL.

Externally Gated

The active input level (high or low) enables pulses, double pulses, or bursts. The last pulse, double pulse, or burst is always completed. The gate source can be selected from:

• External Input

• MAN Trigger key

External Width

To recover a pulse shape of an external signal, applied to the External Input, the period and width are maintained, levels and transitions can be set.

100