B&K Precision 4075B, 4076B, 4077B, 4078B, 4079B Instruction Manual

Model: 4075B, 4076B, 4077B, 4078B, 4079B, 4080B

Arbitrary/Function Waveform Generator

USER MANUAL

Safety Summary

The following safety precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair of this instrument.

Before applying power to this instrument:

 Read and understand the safety and operational information in this manual.  Apply all the listed safety precautions.  Verify that the voltage selector at the line power cord input is set to the correct line voltage.

Operating the instrument at an incorrect line voltage will void the warranty.

 Make all connections to the instrument before applying power.  Do not operate the instrument in ways not specified by this manual or by B&K Precision.

Failure to comply with these precautions or with warnings elsewhere in this manual violates the safety standards of design, manufacture, and intended use of the instrument. B&K Precision assumes no liability for a customer’s failure to comply with these requirements.

Category rating

The IEC 61010 standard defines safety category ratings that specify the amount of electrical energy available and the voltage impulses that may occur on electrical conductors associated with these category ratings. The category rating is a Roman numeral of I, II, III, or IV. This rating is also accompanied by a maximum voltage of the circuit to be tested, which defines the voltage impulses expected and required insulation clearances. These categories are:

Category I (CAT I): Measurement instruments whose measurement inputs are not intended to be connected to the mains supply. The voltages in the environment are typically derived from a limitedenergy transformer or a battery.

Category II (CAT II): Measurement instruments whose measurement inputs are meant to be connected to the mains supply at a standard wall outlet or similar sources. Example measurement environments are portable tools and household appliances.

Category III (CAT III): Measurement instruments whose measurement inputs are meant to be connected to the mains installation of a building. Examples are measurements inside a building's circuit breaker panel or the wiring of permanently-installed motors.

Category IV (CAT IV): Measurement instruments whose measurement inputs are meant to be connected to the primary power entering a building or other outdoor wiring.

i

Do not use this instrument in an electrical environment with a higher category rating than what is specified in this manual for this instrument.

You must ensure that each accessory you use with this instrument has a category rating equal to or higher than the instrument's category rating to maintain the instrument's category rating. Failure to do so will lower the category rating of the measuring system.

Electrical Power

This instrument is intended to be powered from a CATEGORY II mains power environment. The mains power should be 120 V RMS or 240 V RMS. Use only the power cord supplied with the instrument and ensure it is appropriate for your country of use.

Ground the Instrument

To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical safety ground. This instrument is grounded through the ground conductor of the supplied, threeconductor AC line power cable. The power cable must be plugged into an approved three-conductor electrical outlet. The power jack and mating plug of the power cable meet IEC safety standards.

Do not alter or defeat the ground connection. Without the safety ground connection, all accessible conductive parts (including control knobs) may provide an electric shock. Failure to use a properlygrounded approved outlet and the recommended three-conductor AC line power cable may result in injury or death.

Unless otherwise stated, a ground connection on the instrument's front or rear panel is for a reference of potential only and is not to be used as a safety ground.

Do not operate in an explosive or flammable atmosphere

Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finely-divided

ii

particulates.

The instrument is designed to be used in office-type indoor environments. Do not operate the instrument

 In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or finely-

divided particulates.

 In relative humidity conditions outside the instrument's specifications.  In environments where there is a danger of any liquid being spilled on the instrument or

where any liquid can condense on the instrument.

 In air temperatures exceeding the specified operating temperatures.  In atmospheric pressures outside the specified altitude limits or where the surrounding gas is

not air.

 In environments with restricted cooling air flow, even if the air temperatures are within

specifications.

 In direct sunlight.

This instrument is intended to be used in an indoor pollution degree 2 environment. The operating temperature range is 0 °C to 50 °C and the operating humidity is ≤ 95 % relative humidity at < 30 °C, with no condensation allowed. Measurements made by this instrument may be outside specifications if the instrument is used in non-office-type environments. Such environments may include rapid temperature or humidity changes, sunlight, vibration and/or mechanical shocks, acoustic noise, electrical noise, strong electric fields, or strong magnetic fields.

Do not operate instrument if damaged

If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other material gets on or inside the instrument, remove the instrument's power cord, remove the instrument from service, label it as not to be operated, and return the instrument to B&K Precision for repair. Notify B&K Precision of the nature of any contamination of the instrument.

Clean the instrument only as instructed

iii

Do not clean the instrument, its switches, or its terminals with contact cleaners, abrasives, lubricants, solvents, acids/bases, or other such chemicals. Clean the instrument only with a clean dry lint-free cloth or as instructed in this manual.

Not for critical applications

This instrument is not authorized for use in contact with the human body or for use as a component in a life-support device or system.

Do not touch live circuits

Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified service-trained maintenance personnel who are aware of the hazards involved when the instrument's covers and shields are removed. Under certain conditions, even with the power cord removed, dangerous voltages may exist when the covers are removed. To avoid injuries, always disconnect the power cord from the instrument, disconnect all other connections (for example, test leads, computer interface cables, etc.), discharge all circuits, and verify there are no hazardous voltages present on any conductors by measurements with a properlyoperating voltage-sensing device before touching any internal parts. Verify the voltage-sensing device is working properly before and after making the measurements by testing with known-operating voltage sources and test for both DC and AC voltages. Do not attempt any service or adjustment unless another person capable of rendering first aid and resuscitation is present. Do not insert any object into an instrument's ventilation openings or other openings.

Hazardous voltages may be present in unexpected locations in circuitry being tested when a fault condition in the circuit exists.

Fuse replacement

Fuse replacement must be done by qualified service-trained maintenance personnel who are aware of the instrument's fuse requirements and safe replacement procedures. Disconnect the instrument from the power line before replacing fuses. Replace fuses only with new fuses of the fuse types, voltage ratings, and current ratings specified in this manual or on the back of the instrument. Failure to do so may damage the instrument, lead to a safety hazard, or cause a fire. Failure to use the

iv

specified fuses will void the warranty.

Servicing

Do not substitute parts that are not approved by B&K Precision or modify this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety and performance features are maintained.

Cooling fans

This instrument contains one or more cooling fans. For continued safe operation of the instrument, the air inlet and exhaust openings for these fans must not be blocked nor must accumulated dust or other debris be allowed to reduce air flow. Maintain at least 25 mm clearance around the sides of the instrument that contain air inlet and exhaust ports. If mounted in a rack, position power devices in the rack above the instrument to minimize instrument heating while rack mounted. Do not continue to operate the instrument if you cannot verify the fan is operating (note some fans may have intermittent duty cycles). Do not insert any object into the fan's inlet or outlet.

For continued safe use of the instrument

 Do not place heavy objects on the instrument.  Do not obstruct cooling air flow to the instrument.  Do not place a hot soldering iron on the instrument.  Do not pull the instrument with the power cord, connected probe, or connected test lead.  Do not move the instrument when a probe is connected to a circuit being tested.

v

Compliance Statements

This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE), and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements.

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems)

vi

CE Declaration of Conformity

This instrument meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnetic Compatibility Directive with the following standards.

Low Voltage Directive

- EN61010-1: 2001

EMC Directive

- EN 61000-3-2: 2006

- EN 61000-3-3: 1995+A1: 2001+A2: 2005

- EN 61000-4-2 / -3 / -4 / -5 / -6 / -11

- EN 61326-1: 2006

vii

Safety Symbols

Refer to the user manual for warning information to avoid hazard or personal injury and prevent damage to instrument.

Electric Shock hazard

Alternating current (AC)

Chassis (earth ground) symbol.

Ground terminal

On (Power). This is the In position of the power switch when instrument is ON.

Off (Power). This is the Out position of the power switch when instrument is OFF.

Power Switch (On/Off). This is the power switch located in front of the instrument.

CAUTION indicates a hazardous situation which, if not avoided, will result in minor or moderate injury

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

viii

Contents

Safety Summary .............................................................................................. i

Compliance Statements ........................................................................................................ vi

Safety Symbols .................................................................................................................... viii

1 General Information ........................................................................... 1

1.1 Product Overview ......................................................................................................... 1

1.2 Package Contents ......................................................................................................... 1

1.3 Front Panel Overview ................................................................................................... 2

Front Panel Description ................................................................................................ 2

1.4 Rear Panel Overview .................................................................................................... 3

Rear Panel Description ................................................................................................. 3

1.5 Display Overview .......................................................................................................... 4

Display Description ....................................................................................................... 4

2 Getting Started ................................................................................... 4

2.1 Input Power Requirements .......................................................................................... 5

Input Power .................................................................................................................. 5

2.2 Output Connections ..................................................................................................... 5

Impedance Matching.................................................................................................... 6

2.3 Preliminary Check ......................................................................................................... 6

Output Check ................................................................................................................ 6

3 Operating Instructions ........................................................................ 7

3.1 Menu Keys .................................................................................................................... 7

Menu Tree..................................................................................................................... 7

PARAMETER Key ......................................................................................................... 10

WAVEFORM Key .......................................................................................................... 12

PULSE Menu ............................................................................................................... 18

MODE Key ................................................................................................................... 18

SWEEP Key .................................................................................................................. 20

MODULATION Key ...................................................................................................... 21

SETUPS Key ................................................................................................................. 23

UTILITY Key ................................................................................................................. 25

3.2 ON Key ........................................................................................................................ 26

ix

3.3 Cursor Movement Keys .............................................................................................. 26

3.4 Rotary Input Knob ...................................................................................................... 26

3.5 Power-On Settings ...................................................................................................... 26

3.6 Memory ...................................................................................................................... 27

3.7 Displaying Errors ......................................................................................................... 28

3.8 Creating an Arbitrary Waveform ................................................................................ 29

Entering Individual Data Points .................................................................................. 29

Creating a Complex Arbitrary Waveform ................................................................... 30

Setting the Frequency ................................................................................................. 32

Setting the Amplitude ................................................................................................. 33

Loading an Arbitrary Waveform ................................................................................. 33

3.9 Remote Interface ........................................................................................................ 33

USB Interface .............................................................................................................. 33

GPIB Interface ............................................................................................................. 34

4 Programming .................................................................................... 35

4.1 Overview .................................................................................................................... 35

GPIB ............................................................................................................................ 35

4.2 Device State ................................................................................................................ 35

Local State (LOCS) ....................................................................................................... 35

Local With Lockout State (LWLS) ................................................................................ 35

Remote State (REMS) ................................................................................................. 35

Remote With Lockout State (RWLS) ........................................................................... 35

4.3 Interface Function Subsets ......................................................................................... 35

4.4 Device Address ........................................................................................................... 35

4.5 Message Exchange Protocol ....................................................................................... 36

The Input Buffer .......................................................................................................... 36

The Output Queue ...................................................................................................... 36

Response Messages .................................................................................................... 36

Coupled Commands .................................................................................................... 36

4.6 Block Data ................................................................................................................... 37

4.7 Instrument Identification ........................................................................................... 38

4.8 Instrument Reset ........................................................................................................ 38

4.9 Self-test ...................................................................................................................... 38

4.10 Command Syntax ........................................................................................................ 38

x

General Command Structure ...................................................................................... 38

SCPI Command Structure ........................................................................................... 41

4.11 Status Reporting ......................................................................................................... 43

The Status Byte ........................................................................................................... 43

Service Request Enabling ............................................................................................ 43

Standard Event Status Register .................................................................................. 43

The Error Queue ......................................................................................................... 44

Error Codes ................................................................................................................. 44

4.12 Common Commands .................................................................................................. 48

System Data Commands............................................................................................. 48

Internal Operation Commands ................................................................................... 48

Synchronization Commands ....................................................................................... 49

Status and Event Commands ...................................................................................... 49

Device Trigger Commands .......................................................................................... 51

Stored Settings Commands ........................................................................................ 51

4.13 Instrument Control Commands .................................................................................. 52

SOURce Subsystem ..................................................................................................... 52

OUTPut Subsystem ..................................................................................................... 68

Trigger Subsystem ...................................................................................................... 69

Arbitrary Subsystem ................................................................................................... 71

Status Subsystem ........................................................................................................ 80

System Subsystem ...................................................................................................... 84

4.14 IEEE 488.1 Interface Messages ................................................................................... 87

GET - Group Execute Trigger ....................................................................................... 87

DCL - Device Clear ....................................................................................................... 87

SDC - Selected Device Clear ........................................................................................ 87

LLO - Local Lockout ..................................................................................................... 87

4.15 SCPI Command Tree ................................................................................................... 88

Root Node ................................................................................................................... 88

:SOURce Subsystem .................................................................................................... 88

:OUTPut Subsystem .................................................................................................... 88

:TRIGger Subsystem .................................................................................................... 89

:ARBitrary Subsystem ................................................................................................. 89

:STATus Subsystem ...................................................................................................... 90

xi

:SYSTem Subsystem ..................................................................................................... 90

4.16 Block Transfer (GPIB only) .......................................................................................... 92

4.17 GPIB Communication Protocol ................................................................................... 94

General ....................................................................................................................... 94

Responses to IEEE-488.1 Interface Messages ............................................................ 94

IEEE 488.2 Interface Function Subsets ........................................................................ 97

5 Troubleshooting Guide ...................................................................... 98

6 Specifications .................................................................................... 99

SERVICE INFORMATION ............................................................................. 103

LIMITED THREE-YEAR WARRANTY .............................................................. 104

xii

1 General Information

1.1 Product Overview

The B&K Precision 4075B series are versatile high performance arbitrary/function waveform generators capable of generating arbitrary waveforms with 14-bit resolution and length up to 16,000,000 points. In addition to the large waveform memory, these generators offer AM, FM, and FSK modulation along with sweep, burst, and flexible triggering capabilities. The instrument can be remotely operated via the USBTMC or GPIB (IEEE-488.2) interface supporting SCPI commands. Users can create arbitrary waveforms directly from the front panel using the generator’s built-in waveform editing functions or load arbitrary waveforms via the instrument’s remote interfaces.

Features:

 14-bit, 200 MSa/s, and up to 16M points arbitrary waveform generator  Generate Sine waveforms up to 80 MHz, Square waveforms up to 60 MHz  Color LCD display  AM, FM, and FSK modulation functions  Fully programmable markers  Store/recall up to 49 different instrument setups  Standard USBTMC and GPIB (50 MHz/80 MHz models only) interfaces  SCPI-compliant command set

1.2 Package Contents

Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items from the shipping carton, and check for any obvious signs of physical damage that may have occurred during transportation. Report any damage to the shipping agent immediately. Save the original packing carton for possible future reshipment. Every instrument is shipped with the following contents:

 1 x 4075B, 4076B, 4077B, 4078B, 4079B, or 4080B waveform generator  1 x Full instruction manual on CD  1 x AC power cord  1 x USB type A to type B cable  1 x Certificate of calibration  1 x Test report

Verify that all items above are included in the shipping container. If anything is missing, please contact B&K Precision.

1

Power On/Off Switch

Function Keys (F1-F5)

UTILITY Key

CHANNEL Key (4078B, 4079B, and 4080B only)

ENTER Key

Channel Output BNC (50 Ω) and Enable

Rotary Knob and Cursor Keys

Unit Setting Keys

Numeric Keypad

Menu Option Keys

Color LCD Display Window

1

2 3 4 5 6

7 8 9

10

11

(For Models

and 4077B)

1

2

3 4 5

7

8

9

11

10

6

1.3 Front Panel Overview

4075B, 4076B,

Front Panel Description

Figure 1.1 – Front Panel Overview

2

Modulation Input BNC

External Trigger Input BNC

Sync Output BNC

Marker Output BNC

10 MHz Reference Output BNC

10 MHz Reference Input BNC

USBTMC interface

Earth Ground

AC Power Connector and Fuse Box

Rear Cooling Fan

GPIB Port (4076B, 4077B, 4079B, and 4080B only)

Channel 2 I/O (4078B, 4079B, and 4080B only)

Channel 1 I/O

1 2 3

4

5 6 7 8 9

10

11

12

13

1 2 3

4

9

11

5 6 7

8

10

13

12

1.4 Rear Panel Overview

Rear Panel Description

Figure 1.2 – Rear Panel Overview

3

Wave Type

Trigger Mode

Frequency

Menu Parameters Values

Menu Options

Menu Title

General Waveform Display

Channel Selection Indicator

1

2 3 4 5 6

7

8

5

4

8 2 1 3 7

6

1.5 Display Overview

Display Description

2 Getting Started

Figure 1.3 – Display Overview

Before connecting and powering up the instrument, please review and go through the instructions in this chapter.

4

The included AC power cord is safety certified for this instrument operating in rated range. To change a cable or add an extension cable, be sure that it can meet the required power ratings for this instrument. Any misuse with wrong or unsafe cables will void the warranty.

2.1 Input Power Requirements

Input Power

The instrument has a universal AC input that accepts line voltage and frequency input within:

100 – 240 V (+/- 10%), 50 – 60 Hz (+/- 5%)

Before connecting to an AC outlet or external power source, be sure that the power switch is in the OFF position and verify that the AC power cord, including the extension line, is compatible with the rated voltage/current and that there is sufficient circuit capacity for the power supply. Once verified, connect the cable firmly.

2.2 Output Connections

The waveform generator output circuits are protected against short circuit or nominal accidental voltages applied to the main output connector. The output circuits operate as a 50 Ω voltage source working into a 50 Ω load. At higher frequencies, a non-terminated or improperly terminated output may cause aberrations on the output waveform. In addition, loads with an impedance less than 50 Ω will reduce the waveform amplitude, while loads with an impedance greater than 50 Ω will increase waveform amplitude. Excessive distortion or aberrations caused by improper termination are less noticeable at lower frequencies, especially with sine and triangle waveforms. To ensure waveform integrity, follow these precautions:

1. Use good quality 50 Ω coaxial cable and connectors.

2. Make all connections tight and as short as possible.

3. Use good quality attenuators, if it is necessary to reduce waveform amplitudes applied to sensitive

circuits.

4. Use termination or impedance-matching devices to avoid reflections.

5. Ensure that attenuators and terminations have adequate power handling capabilities.

If there is a DC voltage across the output load, use a coupling capacitor in series with the load. The time constant of the coupling capacitor and load must be long enough to maintain pulse flatness.

5

Impedance Matching

If the waveform generator is driving a high impedance, such as a 1 MΩ input impedance (paralleled by a stated capacitance) of an oscilloscope vertical input, connect the transmission line to a 50 Ω attenuator, a 50 Ω termination and to the oscilloscope input. The attenuator isolates the input capacitance of the device and terminates the waveform generator properly.

2.3 Preliminary Check

Complete the following steps to verify that the generator is ready for use.

1. Verify AC Input Voltage

Verify and check to make sure proper AC voltages are available to power the instrument. The AC voltage range must meet the acceptable specification as explained in section 2.1.

2. Connect Power

Connect AC power cord to the AC receptacle in the rear panel and press the power switch to the ON position to turn ON the instrument. The instrument will have a boot screen while loading, after which the main screen will be displayed.

3. Self Adjust

At power-on, the waveform generator performs a diagnostic self-test procedure to check itself for

errors. If it finds an error, an error code and text will appear in the display window. Other error codes appear when you enter an invalid front-panel setting. For more information on error codes, see the Displaying Errors section 3.7. When the waveform generator finishes the diagnostic selftest routine, it enters the local state (LOCS) and assumes power-on default settings.

Output Check

Follow the steps below to do a quick check of the settings and waveform output.

1. Turn on the instrument and set the instrument to default settings. To set to default, press Setups,

press Recall, and select 0 Default Setup. The instrument will set both channels with the following parameters: Waveform Shape: Sine Frequency: 1.000000000 kHz Amplitude: 5 .000 Vpp Offset: 0.000 Vdc Phase: 0.0 ° Output Impedance: 50 OHM

2. Connect the BNC output of CH1 into an oscilloscope.

3. Press the On button on top of CH1 output BNC to turn on the output and observe a sine wave with

the parameters above.

4. Press the Freq option in the menu and use the rotary knob or the numeric keypad to change

frequency. Observe the changes on the oscilloscope display.

6

5. Press the Ampl option in the menu and use the rotary knob or the numeric keypad to change the

amplitude. Observe the changes on the oscilloscope display.

6. Press the Offset option in the menu and use the rotary knob or the numeric keypad to change the

DC offset. With the oscilloscope set for DC coupling, observe the changes on the display.

7. Now, connect the BNC output of CH2 into an oscilloscope and follow steps 3 to 6 to check its

output.

3 Operating Instructions

3.1 Menu Keys

These keys select the main menus for displaying or changing a parameter, function or mode. Below is the hierarchy and selections of the menu tree.

Menu Tree

- PARAM

o FREQ | RATE (Arb Mode Only) o AMPL| OFST o UNITS (Only when AMPL is selected, press to toggle display in Vp-p, Vrms, dBm) o 50 OHM | HI-Z o INTCLK | EXTCLK

- WAVE

o SINE o SQR (Duty Cycle) o TRI (Symmetry) o PULSE

 FREQ | PERIOD  WIDTH  EQUAL EDGE  LEAD | TRAIL  PREV

o ARB

 START  LENGTH  MARK

 ADDR  LENGTH  ON | OFF  PREV

 EDIT

 POINT

7

o ADRS o DATA o PREV

 LINE

o FROM o TO o EXEC

 NO  YES  PREV

o PREV

 PREDEF

o TYPE (Predefined Waveform Type) o FROM | DATA o LENG o SCALE (In %) o EXEC

 NO  YES  PREV

o EXEC (When NOISE is selected as TYPE)

 ADD  NEW  EXEC

 NO  YES  PREV

 PREV

 MORE

o COPY

 FROM  LENG  TO  EXEC

 NO  YES  PREV

 PREV

o CLEAR

 FROM  TO  ALL  EXEC

 NO  YES

8

 PREV

o PROT

 FROM  TO  ALL  ON | OFF  PREV

o SHOW WAVE o PREV

 PREV

 PREV

- MODE

o CONT o TRIG

 MAN (Manual Trigger)  INT (Internal Trigger Rate)  EXT (External Trigger)  PREV

o GATE

 MAN (Manual Gate Trigger)  INT (Internal Gate Trigger Rate)  EXT (External Gate Trigger)  PREV

o BURST

 MAN (Manual Burst)  INT (Internal Burst Rate)  EXT (Burst External)  NBRST (Number of Bursts)  PREV

o PHASE (Not available in ARB mode)

 PHASE (Set Phase Degree)  SET-ZERO (Set Phase to 0)  SYNC Both Ch  PREV

o SYNC Both Ch (ARB mode only)

- SWEEP ( Not Available in PULSE and ARB mode)

o ON | OFF o START (Sweep Start Frequency) o STOP (Sweep Stop Frequency) o RATE (Sweep Rate) o LIN | LOG | UP-DOWN (Linear or Logarithmic)

- MODUL

o AM

 ON | OFF  % (% of Modulation)

 PREV

9

- SETUPS

- UTIL

 SHAPE (AM Modulation Shape)  MOD FREQ (AM Modulation Frequency)  EXT | INT (External or Internal Modulation)

o FM (Not available in PULSE and ARB mode)

 ON | OFF  DEV (FM Deviation Frequency)  SHAPE (FM Modulation Shape)  MOD FREQ (FM Modulation Frequency)  EXT | INT (External or Internal Modulation)

o FSK (Not available in PULSE and ARB mode)

 ON | OFF  F-LO (FSK Low Frequency)  F-HI (FSK High Frequency)  RATE (FSK Rate)  EXT | INT (External or Internal modulation)

o RECALL (Recall Setup from Memory) o LOAD ARB (Loads arbitrary waveform. Available only in ARB mode) o STORE (Store Setup from Memory) o SAVE ARB (Saves current arbitrary waveform into memory. Available only in ARB mode)

o GPIB (ACTIVE) (GPIB Address) o USB (ACTIVE) o POWER (Power On Setup) o SN (Serial number information)

PARAMETER Key

This key selects and displays the waveform frequency, amplitude, offset and external reference, and allows you to adjust the parameters. When Arbitrary Waveform is selected, the display also shows the point rate.

Figure 3.1 - Frequency Menu

F1: Freq/Rate - (Frequency) Selects and displays the frequency. Change the frequency setting using

the cursor keys and rotary knob or numerical keypad. If a certain wavelength can't produce the waveform at the desired frequency, the waveform generator displays an “Out of Range” error message.

10

Front Panel

Amplitude Setting

Data Point

Value

Relative Output

Amplitude Voltage

5 Vp-p

8191

+2.5 V

5 Vp-p

4095

+1.25 V 5 Vp-p

0

0V (offset voltage)

- (Rate) Selects and displays the Point Rate (for Arbitrary Waveform only). The Rate parameter governs the rate at which waveform points are executed, and thus the frequency of the waveform output. When you set this parameter, the waveform generator will keep that execution rate for all waveform lengths until it is changed.

F3: Ampl/Ofst - Selects the Amplitude or the Offset parameters.

- (Offset) Change the offset by using the cursor keys, rotary dial or numerical keypad. If

a certain setting cannot be produced, the waveform generator will display a “Setting Conflict” message.

In Arbitrary mode, this setting defines the maximum peak-to-peak amplitude of a fullscale waveform. If the waveform does not use the full scale of data (-8191 to +8191), then its actual amplitude will be smaller.

Figure 3.2 - Amplitude Menu

Setting the Amplitude

The following equation represents the relative output amplitude voltage relationship between the front-panel amplitude peak-to-peak setting and the data point values in waveform memory:

𝐴𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒 (𝑃𝑒𝑎𝑘 𝑡𝑜 𝑃𝑒𝑎𝑘 𝑠𝑒𝑡𝑡𝑖𝑛𝑔)× 𝑑𝑎𝑡𝑎 𝑝𝑜𝑖𝑛𝑡𝑠 𝑣𝑎𝑙𝑢𝑒

𝑂𝑢𝑡𝑝𝑢𝑡 𝑉𝑜𝑙𝑡𝑎𝑔𝑒 =

+ 𝑜𝑓𝑓𝑠𝑒𝑡

16382

Where 16382 is the total data point value range in waveform memory.

Examples

Table 3.1 - Output Voltage Examples

11

9 Vp-p

-4095

-4.5 V

4 Vp-p

-8191

-2 V

F4: Units - Selects the amplitude units: peak-to-peak, RMS or dBm (sine waves only).

Note: This option is shown when Ampl is selected.

F5: 50 OHM/HI-Z - Selects the amplitude voltage value based on the two different impedance

termination (i.e. if connected to oscilloscope with 1MΩ input impedance, generator will display the correct amplitude value for 1MΩ termination when HIZ is selected).

Note: This option is shown when Ampl/Ofst is selected.

F5: Int Ref/Ext Ref - Selects internal or external reference source (the external reference must be

connected to the rear panel Ref In connector).

Note: This option is shown when Freq is selected.

WAVEFORM Key

Displays the waveforms available:

Figure 3.3 - Waveform Menu

F1: Sine - Selects the sine waveform.

F2: Sqr - Selects the square waveform and displays the waveform duty cycle that can be

changed from 20% to 80% up to 10 MHz, 40% to 60% up to 30 MHz.

F3: Tri - Selects the triangle waveform and displays the waveform duty cycle that can be

changed from 0% to 100% up to 500 kHz, 10% to 90% up to 2 MHz, and 50% up to the max frequency. The triangle maximum frequency is 5 MHz.

F4: Pulse - Selects the Pulse waveform and then displays the pulse menu. Refer to the PULSE

Menu section for details.

F5: ARB - Selects the arbitrary waveform and then displays the Arbitrary menu:

12

Figure 3.4 - Arbitrary Menu

F1: Start - Selects the starting address of the arbitrary waveform.

F2: Length - Selects the length of the arbitrary waveform. Use the START and LENGTH

menu selection to mark a selection of the waveform memory that will be executed.

Note: The maximum Length allowed depends on model.

F3: Mark - (Marker Output) Selects the marker output address of the signal to be

available at the Marker Out connector. The F2: ADDR, F3: LENGTH or F4: ON/OFF can be selected and the Marker output signal can be available at every 4th location address between the start and stop addresses of the executed waveform, starting from address 1 (i.e. 1, 5, 9, 13, etc.). This marker output feature will allow you to generate a positive TTL level output signal at the points specified by address and length.

Note: The maximum Length allowed to be set for marker is 4000. Marker Length can be set at every 4th location address starting from 4 (i.e. 4, 8, 12, etc.)

Figure 3.5 - Marker Menu

Below is an illustration of how the marker function works:

13

Start Address

Length

Markers

0

5 V

Arbitrary waveform

channel output

5 V TTL signal output

from front panel

from rear Marker Out connector

F4: Edit - Refer to the Arbitrary EDIT Menu section below for details.

F5: Prev - Back to previous menu.

Note: Changing one of the arbitrary parameters as start and length causes an update of the output

waveform to the new parameters. When exiting the Arbitrary Menu by selecting a different waveform, a message to save the Arbitrary wave will be displayed. Select YES or NO to save the new waveform. This save functions the same as the SAVE ARB function.

Figure 3.6 - Arb Saving Menu

Arbitrary EDIT Menu

Enters data for creating arbitrary waveforms. You can enter data one point at a time, as a value at an address, draw a line from one point (a value at an address) to another point, create a predefined waveform, or combine these to create complex waveforms. The valid data values range is -8191 to

8191. The valid waveform memory addresses range from 1 to maximum memory length of instrument.

14

The data value governs the output amplitude of that point of the waveform, scaled to the instrument output amplitude. Therefore, a value of 8191 corresponds to positive peak amplitude, 0 corresponds to the waveform offset, and -8191 corresponds to the negative peak amplitude. The following menu displayed:

Figure 3.7 - Edit Menu

F1: Point - This menu allows point by point waveform editing. When selected, the following

menu is displayed:

Figure 3.8 - Point Editing Menu

F1: Adrs - Select the current address in the arbitrary waveform memory. F2: Data - Selects the data point value at the current address. You can change the

point value from -8191 to 8191.

F5: Prev - Returns to the previous menu (Edit menu).

F2: Line - This menu allows a line drawing between two selected points. When selected, the

following menu is displayed:

F1: From - Selects the starting point address. F2: To - Selects the ending point address. F4: Prev - Displays the Confirmation menu, F1: NO and F3: YES. F5: Prev - Returns to the previous menu (Edit menu).

F3: Predef - (Predefined Waveforms) Selects one of the predefined waveforms.

15

Wave

Minimum

Length

Divisible by

Sine

16

4

Triangle

16

4

Square

2

Noise

16

1

Figure 3.9 - Predefine Waveform Menu

F1: Type - Selects the waveform Sine, Triangle, Square, Noise, Ramp up, Ramp

down, exponential up, exponential down, Sin(x)/x, and Gaussian distribution. If Noise function is selected, a submenu is displayed when F5: EXEC is pressed to allow adding the noise to an available waveform or to generate it as a new noise waveform. F2: From/Data - Selects the starting point of the generated waveform and its data

value.

F3: Leng - Selects the length of the predefined waveform (number of points for a

full wave). The length value must be a number that is divisible by 4 or by 2 in some instances. If not, a pop up message will say “Must divide by 4” or “Must divide by 2” and entered values will change back to its original. Different waveforms have different limitations on the length. Refer to Table 3-2 below.

Table 3.2 - Waveform Length Limits for Predefined Waveforms

F4: Scale - Selects the scale of the waveform. If scale is too high, a message will

display “Scale too high.” 100% means that the waveform spans the full scale of -8191 to 8191. Scale factors are limited by the point data value of the starting point and automatically calculated by the unit.

16

Figure 3.10 - Scale Menu

F5: Exec - Prompts you to confirm whether to execute the selected predefined

waveform. Press NO to abort executing the predefined waveform; press YES to execute the predefined waveform. On the NOISE function a menu of ADD and NEW is prompted to select a new noise waveform or to add noise to the existing waveform.

F4: More - Displays the following Menu:

F1: Copy - Displays the Copy menu (see the Copy Function later in this section). F2: Clear - Displays the Clear menu (see the Clear Function later in this section). F3: Prot - Displays the Protect menu (see the Protect Function later in this

section). F4: Show Wave - Display the Arbitrary waveform in full screen mode on LCD display. This is only an approximated display for quick viewing. It does not represent the exact waveform being generated. To return back to the MENU selection, press any button.

F5: Prev - Returns to the previous menu.

Copy Function - Copies an area of waveform memory to another area of waveform memory.

F1: From - Selects the address of the first point to copy. F2: Leng - Selects the length (number of points) of the waveform to copy. F3: To - Selects the destination address where the first point is copied. F4: Exec - Prompts to confirm to copy data. Press NO to abort copying, YES to copy. F5: Prev - Returns to previous menu.

Clear Function - Clears (sets the data values to zero) either a section of or all of waveform memory.

F1: From - Selects the address of the first point to clear. F2: To - Selects the address of the last point to clear. F3: All - Clears the whole waveform memory. F4: Exec - Prompts to confirm to clear data. Press NO to abort clearing, YES to

clear. F5: Prev - Returns to previous menu.

17

Protect Function - Protects (makes read-only) a section of waveform memory.

Note: Only one segment of waveform memory can be protected at a time.

F1: From - Selects the address of the first point to protect. F2: To - Selects the address of the last point to protect. F3: All - Clears the whole waveform memory. F4: On/Off - Selects the unprotect mode and resets memory protection so that the

whole waveform memory can be written into. F5: Prev - Returns to previous menu.

PULSE Menu

From the WAVE menu, select F4: Pulse.

Figure 3.11 - Pulse Menu

F1: Freq/Period - Selects the parameter definition of the Pulse repetition period.

F2: Width - Selects the Width of the generated pulse.

F3: Equal Edge - Selects equal Rise (Leading edge) and Fall (Trailing edge) times of the pulse.

F4: Lead/Trail - Selects different Rise and Fall times of the Pulse.

F5: Prev - Returns to previous menu.

MODE Key

Selects the output mode: Cont (Continuous), Trig (Triggered), Gated (Gated), and Burst (Burst). To select the output mode, press MODE, then press the function key that corresponds to the desired Mode menu option, as shown:

18

Figure 3.12 - Mode Menu

F1: Cont - (Continuous) - Selects continuous output.

F2: Trig - (Triggered) - Triggers one output cycle of the selected waveform for each trigger

event.

F3: Gate - (Gate) - Triggers output cycles as long as the trigger source asserts the gate signal.

F4: Burst - (Burst) - Triggers output N output cycles for each trigger event, where N ranges from

2 to 999999.

F5: Phase - Selects the start phase of the signal in non-continuous modes. The range is from -

180˚ to +180˚, with a 0.1˚ resolution.

When Phase Menu is selected the following screen is displayed:

Figure 3.13 - Phase Menu

F1: Phase - Sets the phase. F2: SET-Zero - Sets the phase reference to zero. F3: SYNC Both Ch. - For Dual Channel models, pushing this key synchronizes both

channels in between with a phase shift as in the Phase parameter entered (or 0 after pushing SET-Zero).

After selecting the TRIG, GATE or BURST menu, the trigger source menu is available:

19

Figure 3.14 - Trigger Menu

F1: Man - Selects manual as the trigger source. To trigger the waveform generator, press this

MAN TRIG again.

F2: Int - (Internal) Selects the internal trigger generator as the trigger source. Change the

internal trigger rate displayed with the rotary input knob.

F3: Ext - (External) Selects the external trigger signal as the trigger source. The trigger source

is supplied through the TRIG IN connector.

F4: Nbrst - In BURST mode, the F4 displays Nbrst, the number of burst pulses to be output with

each trigger. The N can be changed from 1 to 999,999.

F5: Prev - (Previous) Returns to the previous Menu selection.

SWEEP Key

Selects the Sweep Mode and allows the entering of sweep parameters: Sweep Start, Sweep Stop, and Sweep Rate.

To select the sweep mode, press SWEEP and then press the function key that corresponds to the desired Sweep menu option as shown below.

Figure 3.15 - Sweep Menu

F1: ON/OFF - Operates the sweep function, selecting between Sweep On or Off.

20

F2: Start - Defines the Sweep Start frequency.

F3: Stop - Defines the Sweep Stop frequency.

F4: Rate - Defines the Sweep Rate.

F5: Lin/Log - Selects Linear or Logarithmic Sweep.

How to Set up Sweep in Different Modes

By default, turning ON the sweep function will automatically set to a continuous (Cont) sweep. In order to change to other modes of sweep, do the following:

1. Set sweep to On by pressing F1.

2. Press the MODE button on the front panel.

3. Select between triggered (Trig), burst (Burst) or gated (Gate) mode.

Note: If this is done before turning on sweep, sweep On selection will automatically reset to default (continuous mode).

MODULATION Key

Selects the modulation mode AM, FM, or FSK. To select the modulation mode, press MODUL key and then press the function key that corresponds to the desired menu option.

Figure 3.16 - Modulation Menu

F1: AM - If AM is selected, the following menu is available:

21

Figure 3.17 - AM Menu

F1: ON/OFF - Turns the modulation ON or OFF. F2: % - Defines the AM modulation depth. F3: Shape - Defines the modulation shape between Sine, Triangle or Square. F4: Mod/Freq - Selects the modulation frequency, from 0.01 Hz to 20.00 KHz. F5: Ext/Int - Selects and enables the external modulation by an external signal

applied to the Modulation In connector.

F2: FM - If FM is selected, the following menu is available:

Figure 3.18 - FM Menu

F1: ON/OFF - Turns the modulation ON or OFF. F2: Dev - Defines the FM deviation frequency.

Note: The deviation is < the frequency. Frequency + deviation is limited to

the unit maximum frequency.

F3: Shape - Defines the modulation shape between Sine, Triangle or Square. F4: Mod/Freq - Selects the modulation frequency, from 0.01 Hz to 20.00 KHz. F5: Ext/Int - Selects and enables the external modulation by an external signal

applied to the Modulation In connector.

F3: FSK - If FSK is selected, the following menu is available:

22

SINE

SQUARE

TRIANGLE

PULSE

ARBITRARY

AM

Yes

FM

Yes

No

FSK

Yes

No

Figure 3.19 - FSK Menu

F1: ON/OFF - Turns the modulation ON or OFF. F2: F-LO - Defines the low frequency of the FSK. F3: F-HI - Defines the high frequency of the FSK. F4: Rate - Selects the rate of the alternating between the low and high

frequencies. F5: Ext/Int - Selects and enables the external FSK when the unit frequency is

alternating between the low and high frequencies by an external signal

applied to the Trig In connector.

Modulation Combinations

SETUPS Key

The waveform generator can store the current front-panel settings, called a setup, into one of 50 storage locations. When you recall a setup, the waveform generator restores the front-panel settings to those that you stored in the selected storage location. All waveform data except for the waveform memory data is stored in the setup.

Figure 3.20 - Setups Menu

23

Stored

Parameters

FREQUENCY

RATE(ARB)

AMPLITUDE

FUNCTION

OFFSET

REPETITION

MODE

N-BURST

START ADRS

WAVELENGTH

TRIG SOURCE

OUTPUT

SWEEP

MODULATION

F1: Recall - Recalls a previously stored front-panel setup from the selected storage location.

Change the storage location number by using the rotary input knob. Valid storage location numbers are from 0 to 49. Location 0 is a read-only buffer that contains the power-on settings listed in Table 3.3.

F3: Store - Stores the current front-panel setup to the specified storage location. Change the

storage location number by using the numeric keypad or the rotary input knob. Valid storage location numbers range from 1 to 49. Below is a list of parameters that can be stored in each storage location.

Table 3.3 - List of Stored Parameters

When the ARB waveform is selected, the setup menu is as shown:

Figure 3.21 - Setups Menu (with Arbitrary waveform selected)

F2: Load ARB - Selecting this will load the selected Arbitrary waveform data points.

F4: Save ARB - Selecting this will save the current Arbitrary waveform data points so that it can be

recalled when revisiting the ARB menu later on or when power cycling the instrument.

24

8 full-length waveforms can be saved per channel. The saving is performed only on the waveform segment that is defined by the Start and Length parameters defined in the ARB menu.

Note: Storing a waveform generator setup does not store waveform memory data.

The STORE and RECALL function can be used as a tool to store and locate many arbitrary waveforms. See Memory section for more information on segmenting arbitrary waveforms.

UTILITY Key

Figure 3.22 - Utility Menu

F1: Gpib - Selects the GPIB remote mode of operation. After selection, the GPIB address can be

set to any value from 1 to 31 using the rotary knob. The value is kept in nonvolatile memory and used at power-on. The factory default address is 9. Setting the address to 31 puts the device in the off-bus state (it will not respond to messages on the GPIB bus).

Note: GPIB is only for models 4076B, 4077B, 4079B, and 4080B.

F2: USB - Selects the USB remote mode of operation. If selected, the ACTIVE message is

displayed.

F4: Power - (Power-On default) Selects the power-on default setting. Select a value using the

numeric keypad or the rotary input knob. The selection is effective after a 10 s timeout period. Select zero (0) to have the waveform generator power on with the factory default settings. Select 50 to have the waveform generator power-on with the settings it had at the last power-off. Select any other value in the range from 1 to 49 to have the waveform generator power-on with the settings that you have saved with STORE (see SETUPS Key section) in the range of 1 to 49.

F5: SN - Selecting this will display the serial number information of the unit.

25

Key Functions

Values

Description

FREQUENCY

1.000000000 Hz

Wave frequency

RATE(ARB)

1 µs

Sample time per point

AMPLITUDE

5.00 V

Peak to peak output amplitude

FUNCTION

SINE

Output waveform

OFFSET

0.00 V

Zero offset

REPETITION

10 ms

Internal trigger rate

Figure 3.23 - Serial Number Information

3.2 ON Key

Use this key to control the main output signal. When the output is active, the On button is illuminated by the built-in LED.

3.3 Cursor Movement Keys

Use these keys to move the cursor (when visible) either left or right. They are used in conjunction with the rotary input knob to set the step size of the rotary input knob.

3.4 Rotary Input Knob

Use this knob to increase and decrease numeric values or to scroll through a list. The cursor indicates the low-order position of the displayed value which changes when you rotate the knob (for straight numeric entries only). For other types of data, the whole value changes when you rotate the knob.

3.5 Power-On Settings

At power-on, the waveform generator performs a diagnostic self-test procedure to check itself for errors. If it finds an error, an error code and text will appear in the display window. Other error codes appear when you enter an invalid front-panel setting. For more information on error codes, see the Displaying Errors section 3.7. When the waveform generator finishes the diagnostic self-test routine, it enters the local state and assumes power-on default settings. Table 3.4 below lists the factory default settings. You can also program the waveform generator for any settings you want at power-on.

Table 3.4 - Power-On Default Settings

26

MODE

CONT

Waveform mode

N-BURST

2

Waves per burst

START ADRS

1

Start memory address

WAVELENGTH

1000

Number of points per waveform

TRIG SOURCE

EXT

External trigger source

OUTPUT

OFF

Output disabled

SWEEP

OFF

Sweep execution

MODULATION

OFF

Modulation execution

4075B

4078B

4076B

4079B

4077B

4080B

Channels 1 2 1 2 1 2

Waveform Memory Length

2 points to 1,048,576 points

2 points to 4,194,304 points

2 points to 16,777,216 points

3.6 Memory

The waveform generator has two types of memory that can be stored and recalled:

- Waveform Memory (8 waveforms per channel)

- Setup Memory (0-49 buffer storage locations)

Up to 8 full waveforms can be stored, each with up to the maximum waveform memory points available per channel.

The user can edit arbitrary waveforms in waveform memory and specify any data value in the range from -8191 to 8191 for any point in waveform memory (14-bit depth). Due to the large memory bank, users have greater freedom in selecting the size and number of waveforms they desire to generate. The STORE and RECALL functions can be used to save the starting address and length of up to 49 different waveforms as reference point setups for quick recall.

Note: The 49 different setups are shared between all 8 arbitrary waveform memory banks. For instance, if Setup 1 is saved from address 1 to 1000 for ARB Wave 1, then ARB Wave 2 is selected and Setup 1 is recalled, address 1 to 1000 will be the recalled reference points.

Waveform Memory setup example:

4080B users could segment one 16,777,216-point arbitrary waveform bank to create a waveform with 1 Mpts, another waveform with 5 Mpts, a third waveform with 4 Mpts, and a fourth waveform with 6 Mpts as shown in figure below.

27

1. First, create or load 16,777,216 waveform data points into arbitrary waveform memory. For more

information, please see the Creating an Arbitrary Waveform section.

2. Save all 16,777,216 points into ARB Wave 1 using the “Save ARB” key in the SETUPS menu.

3. Reference each waveform in the memory bank according to their starting point and length. Using

the “Store” key in the SETUPS menu, save the parameters for each waveform to separate Setup memory locations as follows:

Setup 1 ARB parameters: Start address = 1; Length = 1,000,000 points

Setup 2 ARB parameters: Start address = 1,000,001; Length = 5,000,000 points

Setup 3 ARB parameters: Start address = 6,000,002; Length = 4,000,000 points

Setup 4 ARB parameters: Start address = 10,000,003; Length = 6,000,000 points

To save edited arbitrary waveforms into Waveform Memory, the instrument will display a message "SAVE DATA" after each modification of the arbitrary waveform in the EDIT menu. Please note that any subsequent saving of data will rewrite the entire arbitrary waveform memory bank. Therefore, in order to properly segment the entire range of points in Waveform Memory for Setup recall, the full length of data points should be saved to Waveform Memory first.

Note: Since it is impossible to guarantee 100% of the time against loss of stored data, you should maintain a record of the data stored in memory so that you can manually restore such data, if necessary.

3.7 Displaying Errors

At power-on, the waveform generator performs a diagnostic routine to check itself for problems. If the diagnostic routine finds an error, an error message is displayed. The waveform generator also displays error messages when front-panel settings are either invalid or may produce unexpected results.

Message Text Cause

Out of range Attempt to set variable out of instrument limits. Setting conflict Can't have this parameter set with some other.

28

Trig rate short Internal trigger rate too short for wave/burst. Empty location Attempt to restore nonexistent setting. SCALE too high Attempt to set scale too high for current dot value Protected RAM Attempt to write to protected RAM range.

RAM error Error in testing RAM.

Save RAM New firmware installed. Must divide by 4 Predefined wave length must be divisible by 4. Must divide by 2 Predefined wave length must be divisible by 2.

3.8 Creating an Arbitrary Waveform

You can create an arbitrary waveform using the following methods:

 Enter individual data points  Draw lines between data points  Create a predefined waveform  Export a waveform from software  Create data points using SCPI commands

The waveform’s frequency and amplitude are influenced by the number of data points and their value in the waveform. For further information on how the number of data points influence the frequency and amplitude of a waveform in execution memory, see Setting the Frequency section (on page 32) and Setting the Amplitude section (on page 33), respectively.

Entering Individual Data Points

The most basic way to program an arbitrary waveform is to enter data points for the waveform, one data point at a time. While this can become tedious, the auto-increment function helps this process. To enter individual data points into waveform memory, follow these steps:

1. Press WAVE main key to display the selection menu.

2. Press F5: ARB to display the arbitrary menu.

3. Press F4: EDIT to display the Edit menu.

4. Press F1: POINT to select the point-by-point programming mode.

5. Press F1: ADRS.

6. Use the rotary knob or the numerical keypad to enter the address.

7. Press F2: DATA.

8. Use the rotary knob or the numerical keypad to enter the value for the data point. Valid

entries range from –8191 to 8191.

9. Repeat steps 5 through 8 for additional points until you finish creating your arbitrary

waveform.

29

ACTION

KEYSTROKES

Loads the first 1000 points of waveform memory.

WAVE

F5: ARB F1: START 1 F2: LENGTH 1000 F5: PREV MODE F1: CONT OUTPUT ON

ACTION

KEYSTROKES

Step 1: Load a 1000-point, 50% scaled, predefined sine wave into waveform memory starting at address 1.

WAVE

F5: ARB F4: EDIT F3: PREDEF F1: TYPE (rotate knob for selection) SINE F2:FROM/DATA 1 F3: LENG 1000 F4: SCAL 50 F5: EXEC

Creating a Complex Arbitrary Waveform

To create a complex arbitrary waveform:

 Load a predefined sine waveform  Load a scaled sine waveform at the positive peak of the first sine wave  Draw a straight line between two data points in the waveform  Add a pulse/glitch to the waveform  Add a noise signal at the negative peak of the first sine wave

To see the waveform as you build it, connect the waveform generator to an oscilloscope and perform the following steps:

Note: The user must press ENTER to confirm any input data value (Start address, Length, etc.) when performing the following steps.

The following steps set up the waveform shown in Figure 3.24.

30

F3: YES

Step 2: Load a 5% scaled, 100-point predefined waveform into waveform memory starting at address 200.

F3: PREDEF F1: TYPE SINE F2: FROM 200 F3: LENG 100 F4: SCAL 5 F5: EXEC F3: YES

Step 3: Draw a line between address 251 (the highest point of the sine wave) and address 501 (where the sine wave crosses the origin).

F2: LINE F1: FROM 251 F2: TO 501 F4: EXEC F3: YES

Step 4: Add a negative pulse/glitch (data value -

8191) at addresses 600 through 606.

F1: POINT F1: ADRS 600 F2: DATA

-8191 (repeat -8191 and ENTER for addresses 601-606) F5: PREV

Step 5: Add a 5% noise signal to addresses 700 through 800.

F3:PREDEF F2:FROM 700 F3:LENG 100 F4:SCAL 5 F1:TYPE NOISE F5:EXEC F1:ADD F4:EXEC F3-YES

31

ACTION

KEYSTROKES

Step 1. Set the output rate to 1 µs (equivalent to 1000 Hz output frequency)

PARAM

F1: RATE 1 KHz/us

Figure 3.24 - Steps to set up an Arbitrary Waveform

Setting the Frequency

The arbitrary waveform frequency is a function of the number of data points used to run the waveform (the length parameter in the ARB menu) and the waveform execution point rate. The waveform execution point rate is the execution time between each point in the waveform. The total time taken to run one period of the waveform is given by:

𝑇𝑜𝑡𝑎𝑙 𝑡𝑖𝑚𝑒 = # 𝑜𝑓 𝑝𝑜𝑖𝑛𝑡𝑠 ∙ 𝑟𝑎𝑡𝑒

Because the output frequency is a function of the rate and the number of points being executed, the output frequency is calculated as:

𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 =

# 𝑜𝑓 𝑝𝑜𝑖𝑛𝑡𝑠 ∙ 𝑟𝑎𝑡𝑒

For example, to set the output frequency to 1000 Hz, given the number of data points used for the waveform output is 1000, the rate is calculated as:

1

𝑟𝑎𝑡𝑒 =

1000 𝑝𝑡𝑠 ∙ 1000 𝐻𝑧

EXAMPLE: Setting the Output Frequency

To set the output frequency of a 1000-point waveform to 1000 Hz, set the rate to 1 µs:

1

= 1 𝜇𝑠

32

Front Panel

Amplitude Setting

Data Point Value

Relative Output

Amplitude Voltage

5 V p-p

8191

2.5 V positive peak

5 V p-p

0

0 V (offset voltage)

10 V p-p

-8191

5 V positive peak

Setting the Amplitude

The following equation represents the relative output amplitude voltage relationship between the front-panel amplitude peak-to-peak setting and the data point values in waveform memory:

𝑜𝑢𝑡𝑝𝑢𝑡 𝑣𝑜𝑙𝑡𝑎𝑔𝑒 =

Where 16382 is the total data point value range in waveform memory.

Table 3.5 - Relative Amplitude for Waveform Output (Examples)

𝐴𝑚𝑝𝑙𝑖𝑡𝑢𝑑𝑒 𝑝 − 𝑝 𝑠𝑒𝑡𝑡𝑖𝑛𝑔 ∙ 𝑑𝑎𝑡𝑎 𝑝𝑜𝑖𝑛𝑡 𝑣𝑎𝑙𝑢𝑒

+ 𝑜𝑓𝑓𝑠𝑒𝑡

16382

Loading an Arbitrary Waveform

To load a section of arbitrary waveform memory, specify its start address and length in the ARB menu:

1. Select the channel to ON.

2. Press WAVE and select the F5: ARB function.

3. Press F1: START to display the start address and use the rotary input knob or the numerical

keys to enter the address.

4. Press F2: LENGTH to display the length of the waveform and use the rotary input knob or the

numerical keys to enter the length.

Note: The starting address must be an odd number. If an even number is entered, the instrument will automatically decrement one value to an odd number. For example, if you set start address to 2000 and press ENTER, it will display 1999. The length value must always be an even number. If you input an odd number length, a message will pop up and say “Even wave length” and then decrement one value to an even number. For example, if you entered 1001 as the length, the message will pop up for one second and change the value automatically to 1000.

3.9 Remote Interface

USB Interface

The instrument has a USB interface (USBTMC) on the rear panel for remote communication. From the UTIL menu, press USB to select the USB interface.

33

To communicate with the unit, you must install the USB driver. For Windows® 7 and 8 users, this may install automatically. For other users, visit www.bkprecision.com to download the driver.

Note: Users who have LabVIEW™ or NI-VISA installed will automatically have this driver in their system. In this case, driver download is not required.

GPIB Interface

GPIB Address

The instrument has an optional GPIB interface on the rear panel for remote communication. The optional GPIB interface is shipped with the address set to decimal 9. The address can be changed from the front panel by using the UTIL menu (refer to UTILITY Key section on page 25).

GPIB Connection

The rear panel GPIB connector connects to a standard IEEE-488 bus cable connector. The GPIB line screens are not isolated from chassis and signal ground.

Figure 3.25 – Standard GPIB connector

34

4 Programming

4.1 Overview

GPIB

This section provides detailed information on programming the 4075B Series generators via IEEE-488 GPIB interface. The command syntax as defined by the IEEE 488.2 and SCPI standards are explained in this chapter.

4.2 Device State

The device may be in one of the four possible states described below. The transition between states is defined by IEEE 488.1.

Local State (LOCS)

In LOCS, the device may be operated from the front panel only. Its settings may be queried over the GPIB, but not changed. Commands that do not affect the signal being output by the instrument are accepted.

Local With Lockout State (LWLS)

In LWLS, the device may be operated from the front panel only. Its settings may be queried over the GPIB, but not changed. Commands that do not affect the signal being output by the instrument are accepted. The difference between the LOCS and the LWLS is that from the LWLS the device may enter the Remote With Lockout State.

Remote State (REMS)

In REMS, the device may be operated from the GPIB. Actuating any front panel key will cause the device state to revert to the LOCS.

Remote With Lockout State (RWLS)

In the RWLS the device is operable only from the GPIB. Front panel operation may be returned by either sending an appropriate IEEE 488.1 command, or by cycling the device power.

4.3 Interface Function Subsets

The following interface function subsets are implemented in the 4075B series:

SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, E2, C0

4.4 Device Address

The GPIB address of the device may be set to any value from 0 to 31. The address may be changed from the front panel, using the numeric keypad or the rotary encoder, or via the GPIB itself using the

35

command:

:SYSTem:COMMunicate:GPIB:ADDRess

Setting the device to address 31 puts it in the 'off-bus' state. In this state it will not respond to messages on the GPIB. If the device is in the REMS when set to address 31, an internal 'return-to-local' command will be given, setting the device to the LOCS. If the device is in the RWLS, the 'return-to-local' command is ignored, and the device remains in the RWLS. The only way to then re-establish communication with the device over the GPIB is to cycle the power, and to then change the address to that required from the front panel.

4.5 Message Exchange Protocol

The device decodes messages using the Message Exchange Protocol (MEP) defined in IEEE 488.2. The following functions implemented in the MEP must be considered:

The Input Buffer

The device has a 256-byte long cyclic input buffer. Decoding of remote messages begins as soon as the input buffer is not empty, that is, as soon as the controller has sent at least one byte to the device. Should the input buffer be filled up by the controller faster than the device can remove the bytes and decode them, the bus handshake is not completed until room has been made for more bytes in the buffer. This prevents a fast controller from overrunning the device with data. If the user has sent part of a Program Message, but not the Program Message Terminator, and he wishes to abort the message decoding and execution, the Device Clear command may be sent, or front panel operation resumed (in REMS only).

The Output Queue

The device has a 100-byte long output queue in which it stores response messages for the controller to read. If at the time a response message is formatted the queue contains previously formatted response messages, such that there are not enough places in the queue for the new message, the device will put off putting the message in the queue until there is place for it.

The Status Byte MAV bit, when set, indicates that part or all of a response message is ready to be read.

Response Messages

The device sends a Response Message in response to a valid query. All queries return a single Response Message Unit. In only one case is the Response Message generated when the response is read (as opposed to when the response is parsed), and this is when querying Arbitrary Waveform data. All other queries generate the Response Message when they are parsed.

Coupled Commands

Coupled Commands are either commands whose execution validity depends on the value of other parameters, or commands whose execution changes the value of another parameter. The execution of commands designated as being coupled is deferred until all other commands in the same Program

36

Message have been executed. The coupled commands are then grouped together according to their functionality, and executed as a group. These groups of coupled commands are defined in the 4075B series:

a) The commands to set the amplitude, the offset, and to switch the output on. The output being

switched on is included here in order to prevent possible damage to the equipment being

driven as a result of the amplitude and offset not being executed as intended by the user, due

to an execution error.

b) The commands to set the function, frequency, the point rate, the wavelength, and the

waveform start address. In ARB function, setting the frequency or the point rate causes the

other to change, keeping the wavelength constant (if it, too, is not specified in the same

program message). If the wavelength is specified as well, the frequency or point rate must

change in accordance with the new value. The validity of the start address is a function of the

wavelength. Please refer to the individual commands for more detail.

The maximum frequency is also dependent upon the waveform, so that changing the waveform

may render the current frequency out of range.

c) The commands to set modulation, modulation source and the function are inter-related. FM

and FSK are not available for ARB function. External source of modulation can be active for

either FM or AM but not both. FSK and FM cannot be active at the same time.

d) Sweep start and sweep stop frequencies must be distanced more than the minimum allowed

for sweep to function correctly.

4.6 Block Data

Arbitrary waveform values may be sent to the device in one of three formats:

a) ASCII values b) Definite form arbitrary data c) Indefinite form arbitrary data

Essentially we would like to check the execution validity of all the data of a command before

execution. When downloading a long arbitrary waveform, however, it is not possible to check

all the data sent before execution, since this would require excessive amounts of memory. The

following compromise has therefore been reached:

An arbitrary waveform is limited in length only by the amount of waveform memory. Each point

is checked and then written to memory. If an invalid value is detected all subsequent values are

discarded, and an execution error is flagged.

Querying arbitrary waveform data will result in a Response Message containing only as many

points as the user requested.

37

4.7 Instrument Identification

The *IDN? common query is used to read the instrument's identification string. The string returned is something similar to the following:

B&K Precision, 4080B, 0, V1.00

4.8 Instrument Reset

The *RST common command effects an instrument reset to the factory default power up state.

4.9 Self-test

The *TST common query causes the device to perform a self-test. This self-test consists of checking the functionality of the arbitrary waveform memory.

4.10 Command Syntax

General Command Structure

The device commands are generally defined by the SCPI standard, with the exception of those instrument functions for which SCPI commands do not as yet exist. The Common Commands and Queries are defined by IEEE 488.2. The command syntax, i.e. how a command is structured, is defined by IEEE 488.2.

A Program Message is defined as a string containing one or more Program Message Units, each of which is an instrument command or query. Program Message Units are separated from each other by the Program Message Unit Separator. The Program Message is terminated by the Program Message Terminator.

The Program Message Unit Separator consists of a semicolon (';'), optionally preceded and/or followed by whitespace characters. A whitespace character is defined as the ASCII characters in the ranges 00H09H, and 0BH-20H. This range includes the ASCII control characters and the space, but excludes the Linefeed character.

The Program Message Terminator consists of optional whitespace characters, followed by one of three options:

a) The Linefeed (LF) character (ASCII 0A) b) The GPIB EOI bus line being set true on the last byte of the message c) LF being sent with EOI true

The Program Message Unit can be divided into three sections as follows:

a) Program Header

The Program Header represents the operation to be performed, and consists of ASCII character mnemonics. Two types of Program Headers are used in the 4075B series: Instrument-control headers and Common Command and Query headers. A Program Header may consist of more than one

38

mnemonic, in which case the mnemonics are separated from each other by the colon (':'). For instrument control commands, the mnemonics are specified by the SCPI standard, and indicate the tree structure of the command set. The first mnemonic indicates the subsystem being controlled. Common Command and Query Program Headers consist of a single mnemonic prefixed by an asterisk ('*').

The mnemonics consist of upper - or lower-case alpha characters. Mnemonics may be written in either the long form, in which the entire mnemonic is written out, or the short form, in which only a specified portion of the mnemonic is written out. Some mnemonics have only one form due to their short length. Where a command is described, the portion appearing in upper case is the short form. Only the short form or the long form may be used.

Example: The command to set the frequency to 1 kHz may be written in the following ways:

SOURCE:FREQUENCY 1KHZ SOUR:FREQ 1KHZ SOURCE:FREQ 1KHZ

Some mnemonics in a specified Program Header may be optional. This is indicated in the command description by the mnemonic being enclosed in square brackets ([...]). This means it is not necessary to write the mnemonic into the Program Header: it is a default condition. The 'SOURCE' mnemonic, for example, is optional. Not specifying it will cause the device to search for the mnemonics in the Program Header under the Source Subsystem. For example, the frequency may be set by the commands

FREQ:CW 1KHz FREQ 1KHz

since the 'CW' mnemonic is also optional.

b) Program Header Separator

The Program Header Separator is used to separate the program header from the program data. It consists of one or more whitespace characters, denoted as <ws>. Typically, it is a space.

c) Program Data

The Program Data represent the values of the parameters being set, for example, the '1KHZ' in the above examples. Different forms of program data are accepted, depending on the command. The Program Data types used in the instrument are:

i. Character program data

This form of data is comprised of a mnemonic made up of lower - or upper-case alpha characters. As with Program Header mnemonics, some Character Data mnemonics have short and long forms. Only the short or the long form may be used.

ii. Boolean data

39

Boolean data indicate that the parameter can take one of two states, ON or OFF. The parameter may be character type ON or OFF or numeric. A numeric value is rounded to an integer. A non-zero result is interpreted as 1 (ON), and a zero result as 0 (OFF). Queries return the values 0 or 1.

iii. NRf

This is a decimal numeric data type, where NR1 indicates an integer number, NR2 indicates a fixed point real number, and NR3 indicates a floating point real number.

iv. Expression data

An expression is contained in parentheses (...). This data type is used only with the STATus:QUEue:ENABle command.

v. Numeric value program data

This data type defines numeric values, as well as special cases of Character Data. Numeric values may be specified in any of Integer, Fixed Point or Floating Point format. All parameters which have associated units accept a suffix, which may be specified using upper or lower-case characters. When the suffix is not specified, the numeric value is accepted in the default units, which are Hertz for frequency, Seconds for time, and Volts for voltage. To set the frequency to 1 KHz we can send one of the following commands:

FREQ 1000 FREQ 1E3

The special forms of character data accepted as numbers are

MAXimum: sets the parameter to its maximum value. MINimum: sets the parameter to its minimum value.

For example, to set the frequency to its maximum value we can send the command

FREQ MAX

vi. Arbitrary Block Data

The Arbitrary block data type is used to send arbitrary waveform data to the instrument. In this data type, the waveform points are specified in binary format, and each point consists of two bytes. Two types of arbitrary block data are defined (by IEEE 488.2):

Definite Form

40

The Definite Form has the structure

-#-Byte Count Length - Byte Count - 8-bit byte

The Byte Count Length consists of a single ASCII digit from 1 to 9. It tells the parser how many digits are in the Byte Count.

The Byte Count is a decimal integer made up of the number of digits specified in the Byte Count Length. It tells the parser how many 8-bit bytes are being sent.

Indefinite Form

The Indefinite Form has the structure

- # - 0 – 8-bit byte – LF^EOI

Some Program Message Units either require, or can accept, more than one data element. Program data elements are separated from each other by the Program Data Separator. It is defined as optional whitespace characters followed by a comma (','), which in turn is followed by optional whitespace characters.

There are two types of Program Message Units: Command Message Units and Query Message Units. A Query differs from a Command in that the Program Header is terminated with a question mark ('?'). For example, the frequency might be queried with the following query:

FREQ?

Some Query Message Units accept data, giving the device more specific information about what is being queried. In many cases the Query Message Unit may optionally be supplied with the MIN or MAX mnemonics as data. This tells the device to return the minimum or maximum value to which the parameter may currently be set. For example,

FREQ? MAX

will return the maximum value to which the frequency may currently be set.

Not all Program Message units have query forms (for example, STATUS:PRESET), and some Program Message Units might have only the query form (for example SYSTEM:VERSION?).

The instrument puts the response to the query into the output queue, from where it may be read by the controller. The Status Byte MAV bit is set to indicate to the controller that a response is ready to be read.

SCPI Command Structure

SCPI commands are based on a hierarchical structure. This allows the same instrument-control header

41

to be used several times for different purposes, providing that the mnemonic occurs in a unique position in the hierarchy. Each level in the hierarchy is defined as a node. Mnemonics in the different levels are separated from each other by a colon (':'). The first Program Message Unit, or command, in a Program Message is always referenced to the root node. Subsequent commands are referenced to the same level as the previous command. A Program Message Unit having a colon as its first character causes the reference to return to the root. This process is defined by IEEE 488.1, section A.1.1. Consider the following examples:

a) The following command may be used to set the amplitude and the offset of the signal.

SOURCE:VOLTAGE:AMPLITUDE 5V;OFFSET 2V

Note that the offset command is referenced to the command preceding it: the OFFSET mnemonic resides at the same node as the AMPLITUDE command.

b) This command set the frequency and the amplitude.

SOURCE:FREQUENCY 2KHZ;VOLTAGE:AMPLITUDE 4V

The FREQUENCY and VOLTAGE mnemonics are at the same level.

c) When Program Message Units describe different subsystems, a colon prefix must be used to reset

the command reference to the root. Here the frequency and the output state are set.

SOURCE:FREQUENCY 3KHZ;:OUTPUT:STATE ON

Common Commands may be inserted in the Program Message without affecting the instrument-control command reference. For example,

SOURCE:VOLTAGE:AMPLITUDE 4V;*ESE 255;OFFSET 2V

In an instrument with multiple channels, the selection of which channel to use is achieved through the use of a numeric suffix indicating the channel, attached to the root level mnemonic. Four root level mnemonics are channel - dependent, and these are SOURce, TRIGger, OUTPut and ARBitrary. When the channel is not specified, channel 1 is assumed. Program message units that are referred back to a specific root level mnemonic operate on the channel specified in that mnemonic.

Examples:

a) SOUR:FREQ 5KHZ;VOLT:AMPL 3V

Sets the frequency and amplitude of the first channel (default).

b) SOUR2:FREQ 5KHZ;VOLT:AMPL 3V

Sets the frequency and amplitude of channel 2.

c) ARB2:START 100;LENGTH 50

Sets the start address and length of the waveform being output on channel 2.

42

4.11 Status Reporting

The instrument is capable of reporting status events and errors to the controller, using the IEEE 488.1 Service Request function and the IEEE 488.2 Status Reporting structure.

The Status Byte

Status summary information is communicated from the device to the controller using the Status Byte (STB). The STB is composed of single-bit summary-messages, each summary message summarizing an overlying Status Data Structure. By examining the content of the STB, the controller gains some information concerning the instrument's status.

The STB bits are defined as follows:

Bit 0: Unused

Bit 1: Unused

Bit 2: Error/event queue summary message (EVQ). This bit is set if the queue is not empty.

Bit 3: Questionable Status summary message.

Bit 4: Message Available (MAV) summary message. This bit is set whenever all or part of a

message is available for the controller to read. The controller may be ready to read the response message before it is available, in which case it can either wait until this bit is set, or it can start to read. In the second case, the controller timeout must be set so that the read action will not be aborted before the message has been read.

Bit 5: Event Status Bit (ESB) summary message. This bit is set to indicate that one or more of

the enabled standard events have occurred. Bit 6: Request Service (RQS). This bit is set when the device is actively requesting service. Bit 7: Operation Status summary message. No Operation Status events are defined in the

instrument, and so this bit is never set.

The STB is read by the controller during a serial poll. If the RQS bit was set, it is then cleared. The STB may also be read by the *STB? common query.

Service Request Enabling

Service request enabling allows the user to select which Status Byte summary messages may cause the device to actively request service. This is achieved using the Service Request Enable Register, which is an 8-bit register whose bits correspond to those of the STB. The RQS bit in the STB is set when a bit in the STB is set, and its corresponding bit in the service request enable register is set.

The service request enable register is set using the *SRE common command, and read using the *SRE? common query.

Standard Event Status Register

The Standard Event Status Register (SESR) is defined by IEEE 488.2. It is implemented in the instrument as a byte, whose bits have the following definitions:

43

Bit 0: Operation Complete (OPC). This bit is set in response to the *OPC common command

being executed. Bit 1: Request Control (RQC). Not implemented. Bit 2: Query Error (QYE). This bit is set when either the controller is attempting to read data

from the device when none is available, or when data prepared for the controller to read

has been lost. Bit 3: Device-Specific Error (DDE). This bit is set to indicate that a device operation did not

execute due to some device condition. For example, trying to recall an uninitialized

device stored setting. Bit 4: Execution Error (EXE). This bit is set when the device could not execute a command, due

to the command being outside of it's capabilities. For example, a parameter being out of

range. Bit 5: Command Error (CME). This bit is set to indicate an error in the command syntax. Bit 6: User Request (URQ). This bit is not used. Bit 7: Power On (PON). This bit is set when the device is powered on.

The SESR is queried using the *ESR? common query.

The SESR is paired with an enable register, the Standard Event Status Enable Register (SESER). This register enables one or more events in the SESR to be reflected in the Status Byte ESB summary message bit. The bits of the SESER correspond to those of the SESR. Setting a bit in the SESER enables the corresponding event to set the ESB bit when it occurs. The SESER is set with the *ESE common command and queried with the *ESE? command query.

The Error Queue

The error queue is used to store codes of errors detected in the device. It is implemented as a cyclic buffer of length 10. When the error queue is not empty, bit EVQ in the Status Byte is set. The error queue is read with either one of the following two queries:

:SYSTEM:ERROR? :STATUS:QUEUE:NEXT?

The first error in the queue is returned, and the queue is advanced.

Error Codes

The negative error codes are defined by SCPI. Positive codes are specific to the instrument. The error message is returned in the form:

<error number>,"<error description>"

A table of error numbers and their descriptions is presented here.

No error reported

0 No error

44

Command Errors

A command error is in the range -199 to -100, and indicates that a syntax error was detected. This includes the case of an unrecognized header. The occurrence of a command error causes the CME bit (bit 5) of the Standard Event Status Register to be set.

-100 Command Error

-101 Invalid character

-102 Syntax error

-103 Invalid separator

-104 Data type error

-105 GET not allowed

-108 Parameter not allowed More parameters than allowed were received

-109 Missing parameter

Fewer parameters than necessary were received

-110 Command header error

-111 Header separator error

-112 Program mnemonic too long

The mnemonic must contain no more than 12 characters.

-114 Header suffix out of range; Only suffix of 1 or 2 is valid, indicating the

channel being operated.

-113 Undefined header

-120 Numeric data error

-121 Invalid character in number

-123 Exponent too large

IEEE 488.2 specifies maximum of 32000

-124 Too many digits

IEEE 488.2 specifies maximum of 255 digits in mantissa.

-128 Numeric data not allowed A different data type was expected

-131 Invalid suffix

-134 Suffix too long A maximum of 12 characters are allowed in a suffix.

-138 Suffix not allowed

-140 Character data error.

-141 Invalid character data. Incorrect character data were received.

-144 Character data too long Character data may contain no more than 12 characters.

-148 Character data not allowed

-158 String data not allowed

-161 Invalid block data An error was found in the block data

-168 Block data not allowed

45

-170 Expression error Only 6 error ranges may be specified.

-171 Invalid expression An error was found in the expression.

-178 Expression data not allowed

Execution Errors

An execution error indicates that the device could not execute a syntactically correct command, either since the data were out of the instrument's range, or due to a device condition. The EXE bit (bit 4) of the Standard Event Status Register is set on occurrence of an execution error.

-200 Execution error

An attempt was made to RECALL the contents of an uninitialized stored setting buffer.

-201 Invalid while in local.

-211 Trigger ignored.

The GET or *TRG common command was ignored due to the device not being in the correct state to execute the trigger.

-220 Parameter error. A parameter is in the correct range, but conflicts with other parameters.

-221 Settings conflict. The parameter is out of range due to the current instrument state.

-222 Data out of range.

-223 Too much data.

The arbitrary waveform memory limit has been exceeded.

-224 Illegal parameter value. The parameter value must be selected from a finite list of possibilities.

-241 Hardware missing; A command was sent to operate a non-existent

channel.

-258 Media protected. An attempt was made to write to protected arbitrary waveform memory.

Device-Specific Errors

An error specific to the device occurred. The DDE bit (bit 3) of the Standard Event Status Register is set.

-315 Configuration memory lost.

Device memory has been lost.

-330 Self-test failed.

-350 Queue overflow.

Error codes have been lost due to more than 10 errors being reported without being read.

Query Errors

46

A query error indicates that the output queue control has detected a problem. This could occur if either an attempt was made to read data from the instrument if none was available, or when data were lost. Data could be lost when a query causes data to be formatted for the controller to be read, and the controller sends more commands without reading the data.

-410 Query INTERRUPTED. Data were sent before the entire response of a previous query was read.

-420 Query UNTERMINATED.

-430 Query DEADLOCKED.

-440 Query UNTERMINATED after indefinite response.

System Events

System events have positive valued codes. They are not defined by SCPI, but are specific to the instrument. Sending the :STATus:PRESet command will disable these events from being reported.

401 Power on 402 Operation complete The *OPC command has been executed.

Warnings

The execution of some commands might cause an undesirable instrument state. The commands are executed, but a warning is issued. Sending the :STATus:PRESet command disables reporting of warnings. The existence of these conditions causes a bit in the Status Questionable Condition register to be set (refer to section Questionable Condition).

500 Trigger rate short on channel 1 501 Trigger rate short on channel 2 510 Output overload on channel 1 511 Output overload on channel 2

"Trigger rate short" means that the period of the waveform is larger than the value of the internal trigger rate. Thus not every trigger will generate a cycle (or burst) of the waveform.

An attempt was made to read a response before the complete program message meant to generate that response was sent.

The input buffer and output queue are full, and the controller is attempting to send more data. In this case the output queue and input buffers will be cleared. Parsing will resume after the END message is detected.

A query was received in the same program message after a query requiring an indefinite response was formatted. Essentially this means that the *IDN? common query and the :ARB:DATA? query should not be followed by more query messages in the same program message.

47

4.12 Common Commands

The following section describes the common commands according to the IEEE 488.2 specifications. These commands are applicable for both GPIB and USB interface.

System Data Commands

a) *IDN? - Identification query

The identification query enables unique identification of the device. This query should always be the last in a program message. It returns a string with four fields:

Manufacturer name Model name Serial number (0 if not relevant) Version number

Command Type: Common Query Syntax: *IDN? Response: B&K Precision, MODEL 4080B,0,V0.82

b) *OPT? - Option identification query

The Option Identification Query is used to identify device options over the system interface. This query should always be the last in a program message.

Command Type: Common Query Syntax: *OPT? Response: No option available.

Internal Operation Commands

a) *RST - Reset command

The Reset command performs a device reset. It causes the device to return to the factory default power up state.

Type: Common Command Syntax: *RST

b) *TST? - Self-test query

The self-test query causes an internal self-test to be performed. This test consists of checking the integrity of the arbitrary waveform memory.

Type: Common Query Syntax: *TST? Response: ASCII 0 if test passes ASCII 1 if test fails

48

Synchronization Commands

a) *OPC - Operation complete command

The operation complete command causes the device to generate the operation complete message in the Standard Event Status Register, on completion of the selected device operation.

Type: Common Command Syntax: *OPC Examples: FREQ 5KHZ;*OPC

The *OPC command (and the *OPC? query described below) find use mainly when commands having relatively long execution times are executed, for example the programming of long predefined waveforms.

b) *OPC? - Operation complete query

The operation complete query places an ASCII character 1 in the output queue on completion of the selected device operation.

Type: Common Query Syntax: *OPC? Response: ASCII character 1 Example FREQ 1KHz;*OPC?

c) *WAI - Wait-to-continue command

This command is intended for use with overlapped commands. No commands in the instrument are overlapped, and so this command has no effect.

Type: Common Command Syntax: *WAI

Status and Event Commands

a) *CLS - Clear status

b) *ESE - Standard event status enable

The clear status command clears the SESR and Error Queue status data structures.

Type: Common Command Syntax: *CLS

This command is used to set the value of the Standard Event Status Enable Register.

Arguments Type: NRf Range: 0 to 255. Non integer arguments are rounded before execution.

49

c) *ESR? - Standard event status register query

d) *PSC - Power on status clear command

e) *SRE - Service request enable command

Type: Common Command or Query Syntax: *ESE<ws><NRf> Examples: *ESE 48 (Enables the CME and EXE bits) *ESE 255 (Enables all standard events) Query Syntax: *ESE? Response: <NR1>

This query is used to read the value of the Standard Event Status Register. Reading the register clears it.

Type: Common Query Syntax: *ESR? Response: <NR1>

This command is used to control the automatic power-on clearing of certain status functions.

Arguments Type: Boolean Type: Common Command or Query Command Syntax: *PSC<ws><Boolean> Examples: *PSC ON or *PSC 1

*PSC OFF or *PSC 0 Query Syntax: *PSC? Response: ASCII 0 for OFF ASCII 1 for ON

When set to ON (1), the Service Request Enable Register and the Standard Event Status Enable Register are cleared on power-on.

This command sets the Service Request Enable Register bits.

Arguments Type: NRf Range: 0 to 255. Non integer arguments are rounded before execution. The value of bit 6 is ignored, and is set always to zero. Type: Common Command or Query Syntax: *SRE<ws><NRf> Examples: *SRE 48 (Enables reporting of ESB and MAV events) Query

50

f) *STB? - Status byte query

Device Trigger Commands

a) *TRG - Trigger command

Syntax: *SRE? Response: <NR1>

This query is used to read the value of the Status Byte.

Type: Common Query Syntax: *STB? Response: <NR1>

The value of the Status Byte read with the *STB? query may differ from that read with the Serial Poll. Bit 6 of the STB will be set as long as a reason for requesting service exists, while bit 6 of the STB as read by the Serial Poll is cleared by the Serial Poll.

This command is analogous to the IEEE 488.1 Group Execute Trigger interface message, and has the same effect. It is used to trigger the device to output a wave, and is accepted only when the trigger mode is set to Trigger, Gate or Burst, and the trigger source is set to BUS.

Type: Common Command Syntax: *TRG

Stored Settings Commands

a) *RCL - Recall instrument state

b) *SAV - Save instrument state

This command is used to restore the state of the device to that stored in the specified memory location.

Arguments Type <NRf> Range 0 to 49. Non integer values are rounded before execution

Type: Common Command Syntax: *RCL<ws><NRf> Example: *RCL 0 (Recall default state) *RCL 49

Stored setting location 49 stores the last instrument setting before power down.

This command is used to store the current instrument state in the specified memory location.

51

Arguments Type: NRf Range: 1 to 49. Non integer values are rounded before execution Type: Common Command or Query Syntax: *SAV<ws><NRf> Examples: *SAV 25

4.13 Instrument Control Commands

Instrument control commands are grouped into logical subsystems according to the SCPI instrument model. The commands are comprised of mnemonics indicating the subsystem to which the command belongs, and the hierarchy within that subsystem. When the command is to be referred to the Root node, it should be prefixed with a colon (:). Mnemonics appearing in square brackets [...] are optional. The '|' character is used to denote a choice of specifications. The '<ws>' is used to denote a white space character.

All commands except those in the STATus and SYSTem subsystems, and commands specifically indicated, are channel-dependent. Commands are referenced to channel 1 by default. The numeric suffix '2' must be appended to the subsystem mnemonic to refer a command to channel 2. (See SCPI Command Structure)

SOURce Subsystem

The Source Subsystem controls the frequency, voltage, amplitude modulation and clock source. The command structure is as follows:

:SOURce

:FREQuency

[:CW|:FIXed] <numeric value> :FUNCtion [:SHAPe] SINusoid|SQUare|TRIangle||ARBitrary||PULSe : DCYCle ] <numeric value> :VOLTage [:AC] [:LEVel] [:IMMediate] [:AMPLitude] <numeric value> :OFFSet <numeric value> :REFerence INTernal |EXTernal :ROSCillator [:SOURCE] INTernal |EXTernal

:AM

52

[:STATe] <Boolean>

:DEPTh <numeric value> :SHAPe SINusoid|SQUare|TRIangle :FREQuency <numeric value> :SOURce INTernal |EXTernal

:FM

[:STATe] <Boolean> :DEViation <numeric value> :SHAPe SINusoid|SQUare|TRIangle :FREQuency <numeric value> :SOURce INTernal |EXTernal

:FSK [:STATe] <Boolean>

:LOWFrequency <numeric value> :HIFrequency <numeric value> :RATE <numeric value> :SOURce INTernal |EXTernal

:SWEep

STATe <Boolean> :SPACing <LIN|LOG> :TIME <numeric value> :STARt <numeric value> :STOP <numeric value>

:PHAse [:ADjust] <numeric value >

SYNChronize

:PULSe :PERiod <numeric value > :WIDth <numeric value > :EDGe <numeric value > :RISe <numeric value > :FALl <numeric value >

Frequency

:SOURce:FREQuency <frequency>

The frequency command controls the frequency of the output waveform.

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Dependent on the Point Rate and Wavelength. Fmax = 1/(5 ns * Wavelength)

53

Fmin = 1/(100 S * Wavelength) Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce]:FREQuency[:CW]<ws><frequency>[units] [:SOURce]:FREQuency<ws>MINimum|MAXimum Examples: :FREQ 5KHZ :FREQ 5E3 :FREQ MAXIMUM :FREQ MIN Query Syntax: [:SOURce]:FREQuency[:CW]?[<ws>MAXimum|MINimum] Examples: :FREQ? :FREQ? MAX Response: NR3

Considerations:

1) The MIN | MAX arguments should be used only in a Program Message that does NOT

contain Program Message Units specifying Arbitrary Point Rate or Wavelength, since the MAXimum or MINimum value is calculated at the time the command is parsed.

2) The MIN and MAX arguments refer to currently settable minimum or maximum.

3) FIXed is alias for CW.

Amplitude

:SOURce:VOLTage[:AMPLitude] <p-p amplitude>

The amplitude command is used to set the peak-to-peak amplitude of the output waveform. Note that the amplitude and the offset are limited by the relation Peak Amplitude + |Offset| ≤ 5V

Arguments Type: Numeric Units: V, mV, VPP, mVPP Range: 10mV to 10V Rounding: 1mV from 10mV to 999mV. 10mV from 1V to 10V. Command Type: Setting or Query Setting Syntax: [:SOURce]:VOLTage:AMPLitude<ws><amplitude>[units] [:SOURce]:VOLTage:AMPLitude<ws>MINimum|MAXimum Examples: :VOLT:AMPL 2.5 :VOLT:AMPL 2.5V :VOLT:AMPL MAX Query Syntax: [:SOURce]:VOLTage:AMPLitude?

54

[<ws>MINimum|MAXimum] Examples: :VOLT:AMPL? :VOLT:AMPL? MAX Response: NR2

Considerations:

1) The MAXimum amplitude is dependent on the offset.

2) The MAX and MIN arguments should not be used in a program message containing an

OFFSet command, since these values are evaluated during parsing, based on the current value of the offset.

Offset

:SOURce:VOLTage:OFFSet <offset>

The offset command is used to set the DC offset of the output waveform. Note that the amplitude and the offset are limited by the relation

Peak Amplitude + |Offset| ≤ 5V

Arguments Type: Numeric Units: V, mV Range: 10mV to 4.99V Rounding: to 10mV Command Type: Setting or Query Setting Syntax: [:SOURce]:VOLTage:OFFSet<ws><offset>[units] [:SOURce]:VOLTage:OFFSet<ws>MINimum|MAXimum Examples: :VOLT:OFFS 2.5 :VOLT:OFFS 2.5V :VOLT:OFFS MAX Query Syntax: [:SOURce]:VOLTage:OFFSet?[<ws>MINimum|MAXimum] Examples: :VOLT:OFFS? :VOLT:OFFS? MAX Response: NR2

Considerations:

1) The MAXimum offset is dependent on the amplitude.

2) The MAX and MIN arguments should not be used in a program message containing an

AMPLitude command, since these values are evaluated during parsing, based on the current value of the amplitude.

55

Clock Reference Source

:SOURce:REFerence:SOURce <clock source>

This command is used to select the source of the arbitrary waveform clock. This clock sets the arbitrary waveform point rate.

Arguments Type: Character Options: INTernal, EXTernal Command Type: Setting or Query Setting Syntax: [:SOURce]: REFerence :SOURce<ws><option> Examples: :REF:SOUR INT :REF:SOUR EXT Query Syntax: [:SOURce]: REFerence :SOURce? Response: INT|EXT

Function

:SOURce:FUNCtion [:SHAPe] The function command is used to set the type of waveform to be generated by the instrument.

Command Type: Setting or Query Setting Syntax: [:SOURce]:FUNCtion[:SHAPe]<WS><OPTION> Examples: :FUNC SIN :FUNC ARB Query Syntax: [:SOURce]:FUNCtion[:SHAPe]? Examples: :FUNC? Response: SIN|TRI|SQU|ARB|PUL

Considerations:

The following functions are available: SINusoid, SQUare, TRIangle, ARBitrary, PULse

56

AM modulation

The following sections control the AM modulation:

AM STATe

This command activates or deactivates AM modulation:

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: [: SOURce:]AM [:STATe]<ws>ON|1|OFF|0 Examples: :SOURce:AM :STAT ON AM OFF Query Syntax: [:SOURce:]AM[:STATe]? Response: 0|1

AM DEPTh

This command sets the AM modulation depth in %

Arguments Type: Numeric Units: none (implied %) Range: 0 to 100 Rounding: to integer Command Type: Setting or Query Setting Syntax: :SOURce:AM:DEPTh<ws><percent depth> :SOURce:AM:DEPTh<ws>MINimum|MAXimum Examples: AM:DEPTh 50 Query Syntax: AM:DEPTh?[<ws>MINimum|MAXimum] Response: NR3

AM SHAPe

This command selects the AM modulating waveform shape

Arguments Type: Character Options: SINusoid, TRIangle, SQUare Command Type: Setting or Query Setting Syntax: [:SOURce:]AM:SHAPe<ws><SIN|TRI|SQU> Examples: [:SOURce:]AM:SHAP SIN AM:SHAPE TRI

57

Query Syntax: [:SOURce:]AM:SHAPe? Response: SIN|TRI|SQU

AM FREQuency

This command sets the AM modulating waveform frequency

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Fmax = 20 KHz Fmin = 0.01 Hz Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]AM:FREQuency<ws><frequency>[units] [:SOURce:]AM:FREQuency<ws>MINimum|MAXimum Examples: AM:FREQ 5KHZ AM:FREQ 5E3 AM:FREQ MAXIMUM AM:FREQ MIN

Query Syntax: [:SOURce:]AM:FREQuency?[<ws>MAXimum|MINimum] Examples: AM:FREQ? AM:FREQ? MAX Response: NR3

AM SOURce

This command selects the AM modulation source as either internal (then the above settings are effective) or external (and then the external waveform determines depth, shape and frequency of modulation).

Arguments Type: Character Options: INTernal, EXTernal Command Type: Setting or Query Setting Syntax: [:SOURce:] AM:SOURce<ws><INT|EXT> Examples: AM:SOUR INT AM:SOUR EXT Query Syntax: [:SOURce]:AM:SOURce? Response: INT|EXT

58

FM modulation

The following commands control the FM modulation:

FM STATe

This command activates or deactivates FM modulation:

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: [:SOURce:]FM[:STATe]<ws>ON|1|OFF|0 Examples: FM:STAT ON FM OFF Query Syntax: [:SOURce:]FM[:STATe]? Response: 0|1

FM DEViation

This command sets the FM modulation deviation

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Dependent on the carrier frequency. Fmax = carrier frequency Fmin = 10 uHz Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce]:FM:DEViation<ws><frequency>[units] [:SOURce]:FM:DEViation<ws>MINimum|MAXimum Examples: FM:DEV 5KHZ FM:DEV 5E3 FM:DEV MAXIMUM FM:DEV MIN Query Syntax: [:SOURce]:FM:DEViation?[<ws>MAXimum|MINimum] Examples: FM:DEV? FM:DEV? MAX Response: NR3 Note: The carrier frequency and deviation cannot exceed the maximum frequency limited by the instrument.

FM SHAPe

This command selects the FM modulating waveform shape

59

Arguments Type: Character Options: SINusoid, TRIangle, SQUare Command Type: Setting or Query Setting Syntax: [:SOURce:]FM:SHAPe<ws><SIN|TRI|SQU> Examples: [:SOURce:]FM:SHPE SIN FM:SHAPE TRI Query Syntax: [:SOURce:]FM:SHAPe? Response: SIN|TRI|SQU

FM FREQuency

This command sets the FM modulating waveform frequency

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Fmax = 20 KHz Fmin = 0.01 Hz Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]FM:FREQuency<ws><frequency>[units] [:SOURce:]FM:FREQuency<ws>MINimum|MAXimum Examples: FM:FREQ 5KHZ FM:FREQ 5E3 FM:FREQ MAXIMUM FM:FREQ MIN Query Syntax: [:SOURce:]FM:FREQuency?[<ws>MAXimum|MINimum] Examples: FM:FREQ? FM:FREQ? MAX Response: NR3

FM SOURce

This command selects the FM modulation source as either internal (then the above settings are effective) or external (and then the external waveform determines deviation, shape and frequency of modulation).

Arguments Type: Character Options: INTernal, EXTernal Command Type: Setting or Query Setting

60

Syntax: [:SOURce:] FM:SOURce<ws><option> Examples: FM:SOUR INT FM:SOUR EXT Query Syntax: [:SOURce]:FM:SOURce? Response: INT|EXT

FSK modulation

The following commands control the FSK modulation:

FSK STATe

This command activates or deactivates FSK modulation:

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: [:SOURce:]FSK[:STATe]<ws>ON|1|OFF|0 Examples: FSK:STAT ON FM OFF Query Syntax: [:SOURce:]FSK[:STATe]? Response: 0|1

FSK LOWFrequency

This command sets the lower of the two frequencies used in FSK modulation.

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: The whole frequency range of the current function. Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]FSK:LOWFrequency<ws><frequency>[units] [:SOURce:]FSK:LOWFrequency<ws>MINimum|MAXimum Examples: FSK:LOWFrequency 5KHZ FSK:LOWF 5E3 FSK:LOWF MAXIMUM FSK:LOWF MIN Query Syntax: [:SOURce:]FSK:LOWFrequency?[<ws>MAXimum|MINimum] Examples: FSK:LOWF? FSK:LOWF? MAX Response: NR3

61

FSK HIFrequency

This command sets the higher of the two frequencies used in FSK modulation.

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: The whole frequency range of the current function. Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]FSK:HIFrequency<ws><frequency>[units] [:SOURce:]FSK:HIFrequency<ws>MINimum|MAXimum Examples: FSK:HIFrequency 5KHZ FSK:HIF 5E3 FSK:HIF MAXIMUM FSK:HIF MIN Query Syntax: [:SOURce:]FSK:HIFrequency?[<ws>MAXimum|MINimum] Examples: FSK:HIF? FSK:HIF? MAX Response: NR3

FSK RATE

This command sets the rate of switching between the two frequencies of the modulation.

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Fmax = 1MHz Fmin = 0.01Hz Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]:FSK:RATE<ws><frequency>[units] [:SOURce:]:FSK:RATE <ws>MINimum|MAXimum Examples: FSK:RATE 5KHZ FSK:RATE 5E3 FSK:RATE MAXIMUM FSK:RATE MIN Query Syntax: [:SOURce]:FSK:RATE ?[<ws>MAXimum|MINimum] Examples: FSK:RATE ? FSK:RATE ? MAX Response: NR3

62

FSK SOURce

This command selects the FSK modulation source as either internal (then the above settings are effective) or external (and then the external waveform determines the frequency of modulation).

Arguments Type: Character Options: INTernal, EXTernal Command Type: Setting or Query Setting Syntax: [:SOURce:] FSK:SOURce<ws><INT|EXT> Examples: FSK:SOUR INT FSK:SOUR EXT Query Syntax: [:SOURce]:FSK:SOURce? Response: INT|EXT

Sweep control

The following commands control the sweep functionality:

Sweep STATe

This command activates or deactivates sweep:

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: [:SOURce:]SWEEP[:STATe]<ws>ON|1|OFF|0 Examples: SWEEP:STAT ON SWEEP OFF Query Syntax: [:SOURce:]SWEEP[:STATe]? Response: 0|1

Sweep SPACing

This command sets the sweep spacing as either LINear or LOGarithmic:

Arguments Type: Character Options: LINear, LOGarithmic Command Type: Setting or Query Setting Syntax: [:SOURce:] SWEEP:SPACing<ws><LIN|LOG> Examples: [:SOURce:] SWEEP:SPACing LIN SWEEP:SPAC LOG

63

Query Syntax: [:SOURce:] SWEEP:SPACing ? Response: LIN|LOG

Sweep TIME

This command sets the time for one complete sweep:

Arguments Type: Numeric Units: S, mS, uS, nS Range: 10mS to 500S Rounding: to 4 digits Command Type: Setting or Query Setting Syntax: [:SOURce:]SWEEP:TIME<ws><time>[units] [:SOURce:]SWEEP:TIME<ws>MINimum|MAXimum Examples: SWEEP:TIME 50MS Query Syntax: [:SOURce:]SWEEP:TIME?[<ws>MINimum|MAXimum] Response: NR3

Sweep STARt

This command sets the start frequency of the sweep:

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Dependent on the frequency range of the current function. Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]SWEEP:STARt<ws><frequency>[units] [:SOURce:]SWEEP:STARt<ws>MINimum|MAXimum Examples: SWEEP:STARt 5KHZ SWEEP:STARt 5E3 SWEEP:STARt MAXIMUM SWEEP:STARt MIN Query Syntax: [:SOURce:]SWEEP:STARt?[<ws>MAXimum|MINimum] Examples: SWEEP:STARt ? SWEEP:STARt ? MAX Response: NR3

Sweep STOP

This command sets the stop frequency of the sweep:

64

Arguments Type: Numeric. Units: MHz, KHz, Hz (default) Range: Dependent on the frequency range of the current function. Rounding: The value is rounded to 4 digits. Command Type: Setting or Query Setting Syntax: [:SOURce:]SWEEP:STOP<ws><frequency>[units] [:SOURce:]SWEEP:STOP<ws>MINimum|MAXimum Examples: SWEEP:STOP 5KHZ SWEEP:STOP 5E3 SWEEP:STOP MAXIMUM SWEEP:STOP MIN Query Syntax: [:SOURce:]SWEEP:STOP?[<ws>MAXimum|MINimum] Examples: SWEEP:STOP ? SWEEP:STOP ? MAX Response: NR3

Phase Adjust

[:SOURce:]PHASe<ws><phase> This command controls the phase adjustment

Arguments Type: Numeric Units: one (degrees implied) Range: -180 to +180 (other values converted to this range) Rounding: to integer Command Type: Setting or Query Setting Syntax: [:SOURce:]PHASe<ws><phase> [:SOURce:]PHASe<ws>MINimum|MAXimum Examples: [:SOURce:]PHASe 500 Query Syntax: [:SOURce:]PHASe?[<ws>MINimum|MAXimum] Response: NR3

Pulse Setting

The following commands control the pulse function: Note that width + 0.6 x (rise + fall) < period in order to have valid values.

PULSe PERiod

This command sets the pulse period to the specified value. Note: This also sets the pulse frequency.

65

Arguments Type: Numeric Units: S, mS, uS, nS Range: 40nS-2000S Rounding: 4 digits Command Type: Setting or Query Setting Syntax: [:SOURce:] PULse: PERiod <ws><value> [:SOURce:] PULse: PERiod <ws>MINimum|MAXimum Examples: [:SOURce:] PULse: PERiod 500NS Query Syntax: [:SOURce:] PULse: PERiod?[<ws>MINimum|MAXimum] Response: NR3

PULse WIDth

This command pulse width to the specified value.

Arguments Type: Numeric Units: S, mS, uS, nS Range: 20 nS minimum; maximum defined by period and transition (see note above) Rounding: 4 digits Command Type: Setting or Query Setting Syntax: [:SOURce:]PULse:WIDth<ws>< value > [:SOURce:] PULse:WIDth <ws>MINimum|MAXimum Examples: [:SOURce:] PULse:WIDth 500NS Query Syntax: [:SOURce:] PULse: WIDth?[<ws>MINimum|MAXimum] Response: NR3

PULse EDGe

This command sets both rising and falling edge of the pulse to the specified value.

Arguments Type: Numeric Units: S, mS, uS, nS Range: 100 nS minimum; maximum defined by period and width (see note above) Rounding: 4 digits Command Type: Setting or Query Setting Syntax: [:SOURce:] PULse:EDGe <ws>< value > [:SOURce:] PULse:EDGe <ws>MINimum|MAXimum Examples: [:SOURce:] PULse:EDGe 500NS Query

66

Syntax: [:SOURce:] PULse:EDGe?[<ws>MINimum|MAXimum] Response: NR3

PULse RISe

This command sets rising edge of the pulse to the specified value.

Arguments Type: Numeric Units: S, mS, uS, nS Range: 100 nS minimum; maximum defined by period and width (see note above) Rounding: 4 digits Command Type: Setting or Query Setting Syntax: [:SOURce:] PULse:RISe <ws><phase> [:SOURce:] PULse:RISe <ws>MINimum|MAXimum Examples: [:SOURce:] PULse:RISe 500NS Query Syntax: [:SOURce:] PULse:RISe?[<ws>MINimum|MAXimum] Response: NR3

PULse FALl

This command sets falling edge of the pulse to the specified value.

Arguments Type: Numeric Units: S, mS, uS, nS Range: 100 nS minimum; maximum defined by period and width (see note above) Rounding: 4 digits Command Type: Setting or Query Setting Syntax: [:SOURce:] PULse:FALl <ws><phase> [:SOURce:] PULse:FALl <ws>MINimum|MAXimum Examples: [:SOURce:] PULse:FALl 500NS

Query Syntax: [:SOURce:] PULse:FALl?[<ws>MINimum|MAXimum] Response: NR3

Duty Cycle

:SOURce:DCYCle <duty cycle value>

This command is used to set the duty-cycle of the square wave or the symmetry of triangular wave. The value is given in percent and the maximum and minimum are frequency dependent.

67

Arguments Type: Numeric Units: None (percent implied) Range: 1 to 100%, depending on the Waveform and Frequency Rounding: to integer Command Type: Setting or Query Setting Syntax: :SOURce:DCYCle <ws><duty cycle value> :SOURce:DCYCle <ws>MINimum|MAXimum Query Syntax: :SOURce:DCYCle?[<ws>MINimum|MAXimum] Response: NR3

OUTPut Subsystem

The Output Subsystem controls characteristics of the source's output. Included in this subsystem are the State and Summing commands. The command structure is as follows:

:OUTPut

[:STATe] <Boolean> :TERminator <Boolean>

Output State

:OUTPut [:STATe] <state 0,1>

This command controls whether the output is ON or OFF.

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: :OUTPut[:STATe]<ws>ON|1|OFF|0 Examples: :OUTP:STAT ON :OUTP OFF Query Syntax: :OUTPut[:STATe]? Response: 0|1

Output Impedance

:OUTPut :TERM <state 0,1> This command controls whether the 50Ohm terminator is ON or OFF.

68

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: :OUTPut:TERM<ws>ON|1|OFF|0 Examples: :OUTP: TERM ON :OUTP: TERM OFF Query Syntax: :OUTPut:TERM? Response: 0|1

Trigger Subsystem

The Trigger Subsystem is used to control the waveform triggering. The command structure is as follows:

:TRIGger

Trigger Mode

:TRIGger:MODE <trigger mode>

This command is used to set the trigger mode. It is not a standard SCPI command.

Arguments Type: Character Options: CONTinuous TRIGger GATE BURSt Command Type: Setting or Query Setting Syntax: :TRIGger:MODE<ws><option> Examples: :TRIG:MODE CONT :TRIG:MODE BURS Query Syntax: :TRIGger:MODE? Response: CONT|TRIG|GATE|BURS

Trigger Source

:TRIGger:SOURce <trigger source>

69

This command is used to select the trigger source, for use in the Trigger, Gate and Burst trigger modes.

Arguments Type: Character Options: MANual - Front panel MAN key BUS - GPIB trigger (GET or *TRG) INTernal - Internal trigger EXTernal - External trigger Command Type: Setting or Query Setting Syntax: :TRIGger:SOURce<ws><option> Examples: :TRIG:SOUR BUS :TRIG:SOUR INT Query Syntax: :TRIGger:SOURce? Response: MAN|BUS|INT|EXT

Burst Count

:TRIGger:BURSt <burst count>

Used to set the number of cycles to be output in the BURST mode. It is not a standard SCPI command.

Arguments Type: Numeric Range: 2 to 999999 Rounding: To integer value Command Type: Setting or Query Setting Syntax :TRIGger:BURSt<ws><value> Examples :TRIG:BURS 100

:TRIG:BURS MAXIMUM

Query Syntax: :TRIGger:BURSt?[<ws>MAXimum|MINimum] Response: NR1 Examples: :TRIG:BURST? :TRIG:BURS? MAX

Internal Trigger Rate

:TRIGger:TIMer <trigger rate>

Sets the rate of the internal trigger.

Arguments

70

Type: Numeric Units: S, mS, uS, nS Range: 1E-6S to 100S Rounding: to 4 digits Command Type: Setting or Query Setting Syntax: :TRIGger:TIMer<ws><value>[units] :TRIGger:TIMer<ws>MINimum|MAXimum Examples: :TRIG:TIM 10E-6 :TRIG:TIM MIN Query Syntax: :TRIGger:TIMer?[<ws>MINimum|MAXimum] Response: NR3 Examples: :TRIG:TIM? :TRIG:TIM? MIN

Arbitrary Subsystem

The Arbitrary subsystem is not part of the SCPI standard. It was developed to suit the needs of the instrument. Within this subsystem are commands to:

1) Control the point rate, start address, wavelength, marker address, and synchronization

pulse address

2) Set values of the arbitrary waveform, either discretely or using predefined, copy or draw

functions

3) Protect an area of waveform memory

4) Set the state of the automatic update and increment features

5) Update the waveform

Note: There are 16,777,216 addressable memory points for models 4077B and 4080B, 4,194,304 points for models 4076B and 4079B, and 1,048,576 points for models 4075B and 4078B.

The following shows the structure of the ARBitrary subsystem:

:ARBitrary

:PRATe <numeric value>

:ADDRess <numeric value> :DATA <numeric value>|<arbitrary block> :DRAW <numeric value>,<numeric value> :CLEar <numeric value>,<numeric value> :COPY <NRf>,<NRf>,<NRf> :PROTect [:RANGe] <numeric value>,<numeric value> :STATe <Boolean> :PREDefined <shape>,<start address>,<length>,<scale>

71

:STARt <numeric value> :LENGth <numeric value> :MARKer [:ADDRess] <numeric value> :STATe <Boolean> :LENGth <numeric value> :SAVe <numeric value>

:LOAD <numeric value>

Point Rate

ARBitrary:PRATe <point rate>

This command is used to set the point rate. It is coupled with the frequency of the waveform by the relation:

𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 =

(𝑃𝑜𝑖𝑛𝑡 𝑅𝑎𝑡𝑒 × 𝑊𝑎𝑣𝑒𝑙𝑒𝑛𝑔𝑡ℎ)

Thus changing the point rate will result in a change in frequency.

Arguments Type: Numeric Units: S, mS, uS, nS Range: 5nS to 100S Rounding: to 4 digits Command Type: Setting or Query Setting Syntax: :ARBitrary:PRATe<ws><point rate>[units] :ARBitrary:PRATe<ws>MINimum|MAXimum Examples: :ARB:PRAT 100NS Query Syntax: :ARBitrary:PRATe?[<ws>MINimum|MAXimum] Response: NR3

1

Address

:ARBitrary:ADDRess <address>

This command sets the current address of the waveform. It is used to determine to where arbitrary data are to be written.

Arguments Type: Numeric Range: 1 to 16,777,216 Rounding: to integer value

72

Command Type: Setting or Query Setting Syntax: :ARBitrary:ADDRess<ws><address> :ARBitrary:ADDRess<ws>MINimum|MAXimum Examples: :ARB:ADDR 100 Query Syntax: :ARBitrary:ADDRess?[<ws>MINimum|MAXimum] Response: NR1

Data

:ARBitrary:DATA <data>

This command is used to set the values of the waveform.

Arguments Type: Numeric. Definite form arbitrary block. Indefinite form arbitrary block Numeric Range: -8191 to 8191 ASCII Rounding: to integer value Binary Range: 001H to 3FFFH BINARY Command Type: Setting or Query Setting Syntax Numeric: :ARBitrary:DATA<ws><numeric>{[,<numeric]} Example :ARB:DATA 100,200,1000,2000,-2000 Arbitrary Block: :ARBitrary:DATA<ws>#<arb block data> See section 4.16 Examples Definite Form: :ARB:DATA #14\x8\x64\x8\xC8 '\x' indicates that the values are Hexadecimal. Indefinite: :ARB:DATA #0\x8\x64\x8\xc8\xa^EOI Query Syntax: :ARBitrary:DATA?<ws><number of points>, BINary|ASCii Response: Using the BINary option, data are returned in the Indefinite arbitrary block form. Using the ASCii option, data are returned in the decimal numeric form. Considerations:

NOTE:

Reading waveform data: USB: The maximum buffer size of the instrument is 32K bytes when communicating over USB. Therefore, when reading arbitrary waveform data in ASCII, it is recommended that data be read in chunks not exceeding 6000 points at a time. If read in Binary, it is recommended that data be read in chunks not exceeding 10,000 points at a time.

GPIB: The maximum buffer size is approximately 200K bytes when communicating over GPIB. For

Data cannot be written to protected memory.

In binary form, each data point consists of two bytes.

The high byte must precede the low byte. (big-endian order)

73

ASCII, it is recommended that data be read in chunks not exceed 10,000 points at a time. For Binary, it is recommended that data be read in chunks not exceeding 100,000 points at a time.

Writing waveform data: It is recommended that waveform data be sent in chunks not exceeding 10,000 points at a time when writing data into the instrument’s arbitrary memory.

Line Draw

:ARBitrary:DRAW <start address>,<end address>

This command is used to generate a straight line between two points in the arbitrary waveform memory.

Arguments Type: Numeric. Range: 1 to 16,777,216 Rounding: to integer value Command Type: Setting only Setting Syntax: :ARBitrary:DRAW<ws><start address>, <end address> Example: :ARB:DRAW 1,1000 Considerations:

1) The value of the data at the start and end points must first be set by the user, using the

:ARB:DATA command.

2) The range of the straight line cannot overlap with protected memory.

3) The end address must be greater than the start address.

Clear

:ARBitrary:CLEar <start address>,<end address>

This command is used to clear all or a portion of waveform memory. The memory is the set to the value zero.

Arguments Type: Numeric. Numeric Range: 1 to 16,777,216 Rounding: to integer value Command Type: Setting only Setting Syntax: :ARBitrary:CLEar<ws><start address>, <end address> Examples: :ARB:CLE 1,1000 Considerations:

74

1) The clear range cannot overlap with protected memory.

2) The end address must be greater than the start address.

Copy

:ARBitrary:COPY <start address>,<length>,<destination address>

This command is used to copy a section of the waveform to a different location in waveform memory.

Arguments Type: NRf Range: 1 to 16,777,216 Rounding: to integer value Command Type: Setting only Setting Syntax: :ARBitrary:COPY<ws><start>,<length>,<destination> Example: :ARB:COPY 1,1000,1001 Considerations:

1) The destination range cannot overlap with protected memory.

2) The destination range cannot overlap with the source range.

3) The destination end address may not exceed the maximum address:

Start address + Length - 1 <= 16,777,216 Destination address + Length - 1 <= 16,777,216

Memory Protection Range

:ARBitrary:PROTect [:RANGe] <start address>,<end address>

This command is used to define a range of arbitrary waveform memory to be write-protected. The protection is effective only if the PROTect:STATe is ON.

Arguments Type: Numeric. Numeric Range: 1 to 16,777,216 Rounding: to integer value Command Type: Setting or Query Setting Syntax: :ARBitrary:PROTect[:RANGe]<ws><start>,<end> Examples: :ARB:PROT 1,1E3 Query Syntax: :ARBitrary:PROTect[:RANGe]? Response: <protect start>,<protect end> in NR1 format.

75

Memory Protection State

:ARBitrary:PROTect:STATe <Boolean>

This command is used to enable or disable arbitrary waveform write-protection.

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: :ARBitrary:PROTect:STATe<ws>ON|1|OFF|0 Example: :ARB:PROT:STAT ON Query Syntax: :ARBitrary:PROTect:STATe? Response: 0|1

Predefined waveforms

:ARB:PRED <shape>,<start address>,<length>,<scale>

This command is used to load the waveform memory with a specific type of waveform.

Arguments Shape Type: Character Options: SINusoid SQUare TRIangle NOISe (Pseudo-Random Noise) ANOise (Noise added to the current waveform)

URAMp (Ramp up) DRAMp (Ramp down)

SINXx (Sin[x]/x) EXPUp (Exponent up) EXPDn (Exponent down) GAUS Start Address Type: Numeric. The MIN and MAX forms both set the address to 1 Range: 1 to 16,777,216 Rounding: to integer value Length Type: Numeric. Range SIN: 16 to 65,536; divisible by 4 SQU: 2 to 65,536; divisible by 2 TRI: 16 to 65,536; divisible by 4 URAM: 16 to 65,536

76

DRAM: 16 to 65,536 NOIS: 16 to 65,536 ANO: 16 to 65,536

SINX: 16 to 65,536

EXPU: 16 to 65,536

EXPD: 16 to 65,536

GAUS: 16 to 65,536 Rounding: to integer value Scale Type: Numeric. MIN sets the scale to 1; MAX sets the scale to 100 Range: 1 to 100 (See considerations) Rounding; to integer value Command Type: Setting only Setting Syntax: :ARBitrary:PREDefined<ws> <shape>, <start>, <length>,<scale> Examples: :ARB:PRED SIN,1,1e3,100 :ARB:PRED URAM,1001,1e3,50 Considerations:

1) The start address and the length must meet the specification that. Start address + Length - 1

<= 16,777,216

2) The 'scale' refers to the scaling of the waveform as a percentage of full scale. A scale of

100% will, under the correct conditions, generate a waveform whose data values range from -8191 to +8191. These 'correct conditions' are set by the 'offset' value. This offset is the value of the data at the start address, and determines the maximum scale settable. The following table shows the data values required in order to achieve maximum scale.

SHAPE DATA SIN 0 SQU 0 TRI 0 NOIS 0 URAM -8191 DRAM +8191 SINX 0 EXPU -8191 EXPD +8191 GAUS 0

Start Address

:ARBitrary:STARt <start address>

This command sets the start address of the waveform to be run.

77

Arguments Type: Numeric Range: 1 to 16,777,215 Rounding: to integer value Command Type: Setting or Query Setting Syntax: :ARBitrary:STARt<ws><start address> :ARBitrary:STARt<ws>MINimum|MAXimum Example: :ARB:STAR 100 Query Syntax: :ARBitrary:STARt?[<ws>MINimum|MAXimum] Examples: :ARB:START? :ARB:STAR? MIN Response: NR1 Considerations: The start address and length must meet the condition:

Start Address + Length - 1 <= 16,777,216

Wavelength

:ARBitrary:LENGth <length>

This command sets the length of the waveform being run.

Arguments Type: Numeric Range: 2 to 16,777,216 Rounding: to integer value Command Type: Setting or Query Setting Syntax: :ARBitrary:LENGth<ws><length> :ARBitrary:LENGth<ws>MINimum|MAXimum Example: :ARB:LENG 1E3 Query Syntax: :ARBitrary:LENGth?[<ws>MINimum|MAXimum] Example: :ARB:LENG? Response: NR1 Considerations:

1) Changing the wavelength will change either the frequency.

2) The minimum wavelength is 2.

Marker Address

:ARBitrary:MARKer [:ADDRess] <marker address>

This command is used to set the address of the marker.

78

Arguments Type: Numeric. Range: 1 to 16,777,216 Rounding: to integer values Setting Syntax: :ARBitrary:MARKer[:ADDRess]<ws><marker address> Examples: :ARB:MARK 45 Query Syntax: :ARBitrary:MARKer[:ADDRess]? Example: :ARB:MARK? Response: Marker address in NR1 format Considerations:

The marker is only output if its address is within the range of addresses currently

being run.

Marker Length

:ARBitrary:MARKer:LENGth <numeric value>

This command is used to set the marker length. The marker length is specified by appending a numeric value, to the MARKer keyword.

Arguments Type: Numeric Range: 1 to 4,000 Command Type: Setting or Query Setting Syntax: :ARBitrary:MARKer:LENGth<ws><length> Example: :ARB:MARK:LENG 5 Query Syntax: :ARBitrary:MARKer:LENGth? Response: NR1

Marker State

:ARBitrary:MARKer:STATe <Boolean>

This command is used to enable or disable the marker.

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: :ARBitrary:MARKer:STATe<ws>ON|1|OFF|0

79

Query Syntax: :ARBitrary:MARKer:STATe? Response: 0/1

Save

:ARBitrary:SAVe

This command is used to save all unsaved arbitrary waveform data into one of the non-volatile memory locations.

Arguments Type: Numeric Range: 1 to 8 Command Type: Setting only Setting Syntax: :ARBitrary:SAVe <location>

Load

:ARBitrary:LOAD

This command is used to load all arbitrary waveform data from one of the non-volatile memory locations.

Arguments Type: Numeric Range: 1 to 8 Command Type: Setting only Setting Syntax: :ARBitrary:LOAD <location>

Status Subsystem

This subsystem controls the SCPI-defined status reporting structures, which are the QUEStionable and OPERation status registers, and the error/event queue. The OPERation status registers are mandated by SCPI, and so are implemented, but are not used by the hardware. No status is ever reported through them, and they are not detailed in this manual. The following shows the STATus structure used:

:STATus

:PRESet

:QUEue [:NEXT]? :ENABle

80

:QUEStionable :CONDition? :PTRansition <NRf> :NTRansition <NRf> :EVENt? :ENABle <NRf>

Status Preset

:STATus:PRESet

This command is used to set certain status values to defined values.

a) The OPERation and QUEstionable enable registers are cleared. b) The Positive transition filters are set to 32767. c) The Negative transition filters are set to 0. d) Only errors in the range (-440:-100) are enabled to be reported in the event queue.

Command Type: Setting only Setting Syntax: :STATus:PRESet

Error Queue Read

:STATus:QUEue?

This query returns the first entry in the error queue, and removes that entry from the queue. Its function is identical to that of the :SYSTem:ERRor? query.

Command Type: Query only Query Syntax: :STATus:QUEue[:NEXT]? Response: <Error number>, "<error description>"

Error Queue Enable

:STATus:QUEue:ENABle

This command is used to enable individual errors to be placed in the queue when they occur. Those errors not specified in the :ENABle command are disabled from being reported in the error queue. Errors and events enabled to be reported at power on depends on the Power on Status Clear status (set with the *PSC common command). If PSC is set, the status is cleared on power on, and the range of errors enabled is as set by the STATus:PRESet command, ie -440 to -100. If PSC is cleared, the status is not cleared on power on, and the errors and events enabled are those that were enabled before the last power down.

81

Type: Expression

The expression data takes the form

(NRf|<event range>[{,NRf|<event range>}])

where NRf represents an error number. Entries are rounded to integer values.

An <event range> is defined as

NRf:NRf

The first number in a range MUST be less than the second.

Up to 6 ranges may be specified using one :ENABle command, representing the 6 ranges of errors/events. The ranges are then separated from each other by Program Data Separators (comma). The entire expression must be enclosed in parentheses(...).

Command Type: Setting or Query Setting Syntax: :STATus:QUEue:ENABle<ws><expression> Example: :STAT:QUE:ENAB (-440:-410,-258:-220,402,-110) Query Syntax: :STATus:QUEue:ENABle? Response: (NRf|<event range>[{,[NRf|event range>]})

Questionable Status

The Questionable status data structure is used to alert the user to instrument conditions that affect the signal quality. Two types of conditions are defined in the AWG, and these are:

1) Frequency - Trigger rate conflict, and

2) Output overload condition.

Each condition is reported separately for each channel. Thus, a total of four conditions may be reported.

The data structure is comprised of five 16-Bit registers. Each bit represents a different status condition. In the AWG, bits 9 and 11 are used as follows:

Bit 9: Frequency - trigger rate conflict. Bit 11: Output overload.

The existence of these conditions is indicated in the CONDition register. Bit 3 of the status byte is used to indicate the occurrence of a questionable status condition. The conditions cause this bit to be set depending on the values of the other four registers.

82

The positive transition filter enables a bit in the event register to be set when a condition changes from false to true. The negative transition register enables a bit in the event register to be set when a condition changes from true to false. In order for the bit in the event register to be set, the corresponding bit in the transition register must be set.

Bit 3 in the status byte will be set if a bit in the event register is set while the corresponding bit in the enable register is set.

Questionable Condition

:STATus:QUEstionable:CONDition?

This query is used to read the condition register.

Command Type: Query only Query Syntax: :STATus:QUES:COND? Response: NR1

Positive Transition Filter

:STAT:QUES:PTR

This command is used to set and query the value of the positive transition filter.

Arguments Type: NRf Range: 0 to 131,072. Non integer arguments are rounded before execution. Command Type: Setting or Query Setting Syntax: :STAT:QUES:PTR<ws><NRf> Examples: :STAT:QUES:PTR 2048 Query Syntax: :STAT:QUES:PTR? Response: NR1

Negative Transition Filter

:STAT:QUES:NTR

This command is used to set and query the value of the negative transition filter.

Arguments Type: NRf Range: 0 to 131,072. Non integer arguments are rounded before execution

83

Command Type: Setting or Query Setting Syntax: :STAT:QUES:NTR<ws><NRf> Examples: :STAT:QUES:NTR 2048 Query Syntax: :STAT:QUES:NTR? Response: NR1

Event Register

:STAT:QUES:EVENt?

This query is used to read the event register. Reading the register clears it.

Command Type: Query only Query Syntax: :STATus:QUES:EVEN? Response: NR1

Event Enable Register

:STAT:QUES:ENABle

This command is used to set and query the value of the enable register.

Arguments Type: NRf Range: 0 to 131,072. Non integer arguments are rounded before execution. Command Type: Setting or Query Setting Syntax: :STAT:QUES:ENAB<ws><NRf> Examples: :STAT:QUES:ENAB 2048 Query Syntax: :STAT:QUES:ENAB? Response: NR1

System Subsystem

The SYSTem subsystem collects the functions that are not related to instrument performance. The functions implemented in the AWG are security, GPIB address changing, error queue reading, SCPI version reading, and power-on buffer setting (not SCPI-defined). The command structure is as follows:

:SYSTem :COMMunicate

84

:GPIB :ADDRess <numeric value> :ERRor? :VERSion? :SECurity [:STATe] <Boolean> :POBuffer <numeric value>

GPIB Address Change

:SYSTem:COMMunicate:GPIB:ADDRess

This command is used to set the GPIB address.

Arguments Type: Numeric Range: 0 to 31 Rounding: to integer value Command Type: Setting or Query Setting Syntax: :SYSTem:COMMunicate:GPIB:ADDRess<ws><address>|MINimum|MAXimum Example: :SYST:COMM:GPIB:ADDR 20 Query Syntax: :SYSTem:COMMunicate:GPIB:ADDRess?[<ws>MINimum|MAXimum] Response: <address> in NR1 format Considerations:

1) Setting the address to 31 puts the instrument in the off-bus state.

2) Using the MAX option sets the address to 30, not 31.

Default Power-on is address 9.

Error Queue Reading

:SYSTem:ERRor?

This query returns the first entry in the error queue, and removes that entry from the queue. It's function is identical to that of the :STATus:QUEue:NEXT? query.

Command Type: Query only Query Syntax: :SYSTem:ERRor? Response: <Error number>, "<error description>"

SCPI Version

:SYSTem:VERSion?

85

This query is used to read the SCPI version to which the instrument complies.

Command Type: Query only Query Syntax; :SYSTem:VERSion? Response: 1992.0 (NR2 format)

Security

:SYSTem:SECurity[:STATe] <Boolean>

This command enables the instrument memory to be cleared. The stored settings and the arbitrary waveform memory are cleared when the Security state is changed from ON to OFF. The instrument state is returned to the factory power-on default.

Arguments Type: Boolean Command Type: Setting or Query Setting Syntax: :SYSTem:SECurity[:STATe]<ws>ON|1|OFF|0 Examples: :SYST:SEC ON :SYST:SEC OFF Query Syntax: :SYSTem:SECurity[:STATe]? Response: 0|1

Power-on Buffer

:SYSTem:POBuffer <buffer number>

This command is used to set the Power On Buffer setting. The instrument will power-on with the setting stored in that buffer.

Arguments Type: Numeric Range: 0 to 49 Rounding: to integer value Command Type: Setting or Query Setting Syntax: :SYSTem:POBuffer<ws><buffer>|MINimum|MAXimum Example: :SYST:POB 49 Query Syntax: :SYSTem:POBuffer?[<ws>MINimum|MAXimum] Response: Power-on buffer in NR1 format

86

4.14 IEEE 488.1 Interface Messages

GET - Group Execute Trigger

The GET is used by the AWG as a trigger when it is in either the TRIGGER, GATE or BURST modes, with the trigger source set to BUS. It has the same effect as the *TRG common command.

DCL - Device Clear

In response to the DCL, the AWG does the following:

a) Clears the input buffer and the output queue. b) Resets the Message Processing Functions.

SDC - Selected Device Clear

The response is as for the DCL message, when device is addressed to listen.

LLO - Local Lockout

Sending LLO when device is addressed to listen and controller is asserting the REN line will put the device into "Remote with Lock out" state, locking out the front panel.

87

B&K Precision 4075B, 4076B, 4077B, 4078B, 4079B Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Summary

Compliance Statements

Safety Symbols

1 General Information

1.1 Product Overview

1.2 Package Contents

1.3 Front Panel Overview

Front Panel Description

1.4 Rear Panel Overview

Rear Panel Description

1.5 Display Overview

Display Description

2 Getting Started

2.1 Input Power Requirements

Input Power

2.2 Output Connections

Impedance Matching

2.3 Preliminary Check

Output Check

3 Operating Instructions

3.1 Menu Keys

Menu Tree

PARAMETER Key

WAVEFORM Key

Arbitrary EDIT Menu

PULSE Menu

MODE Key

SWEEP Key

How to Set up Sweep in Different Modes

MODULATION Key

SETUPS Key

UTILITY Key

3.2 ON Key

3.3 Cursor Movement Keys

3.4 Rotary Input Knob

3.5 Power-On Settings

3.6 Memory

3.7 Displaying Errors

3.8 Creating an Arbitrary Waveform

Entering Individual Data Points

Creating a Complex Arbitrary Waveform

Setting the Frequency

Setting the Amplitude

Loading an Arbitrary Waveform

3.9 Remote Interface

USB Interface

GPIB Interface

GPIB Address

GPIB Connection

4 Programming

4.1 Overview

GPIB

4.2 Device State

Local State (LOCS)

Local With Lockout State (LWLS)

Remote State (REMS)

Remote With Lockout State (RWLS)

4.3 Interface Function Subsets

4.4 Device Address

4.5 Message Exchange Protocol

The Input Buffer

The Output Queue

Response Messages

Coupled Commands

4.6 Block Data

4.7 Instrument Identification

4.8 Instrument Reset

4.9 Self-test

4.10 Command Syntax

General Command Structure

SCPI Command Structure

4.11 Status Reporting

The Status Byte

Service Request Enabling

Standard Event Status Register

The Error Queue