Vxi VM2164 User Manual

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Page 1

bus

VM2164

COUNTER / TIMER

USER’S MANUAL

P/N: 82-0059-000

Rev. June 29th, 2016

VXI Technology, Inc.

2031 Main Street

Irvine, CA 92614-6509

(949) 955-1894

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VXI Technology, Inc.

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www.vxitech.com

VM2164 Preface

INTRODUCTION

Certification .......................................................................................................................................................... 7

Warranty ............................................................................................................................................................... 7

Limitation of Warranty ......................................................................................................................................... 7

Restricted Rights Legend ...................................................................................................................................... 7

DECLARATION OF CONFORMITY ................................................................................................................................ 8

GENERAL SAFETY INSTRUCTIONS ............................................................................................................................. 9

Terms and Symbols .............................................................................................................................................. 9

Warnings ............................................................................................................................................................... 9

SUPPORT RESOURCES.............................................................................................................................................. 11

SECTION 1 ................................................................................................................................................................... 13

INTRODUCTION ....................................................................................................................................................... 13

Overview............................................................................................................................................................. 13

Programming ...................................................................................................................................................... 14

Calibration .......................................................................................................................................................... 14

Built-In Software Functions ................................................................................................................................ 15

Features ............................................................................................................................................................... 15

General Specifications ........................................................................................................................................ 16

Oscillator Specifications ..................................................................................................................................... 20

SECTION 2 ................................................................................................................................................................... 21

PREPARATION FOR USE ........................................................................................................................................... 21

Introduction ........................................................................................................................................................ 21

Calculating System Power and Cooling Requirements ....................................................................................... 21

Setting the Chassis Backplane Jumpers .............................................................................................................. 22

Setting the Logical Address ................................................................................................................................ 22

SECTION 3 ................................................................................................................................................................... 23

COMMAND DICTIONARY ......................................................................................................................................... 23

Introduction ........................................................................................................................................................ 23

The SCPI Programming Language ..................................................................................................................... 23

Notation .............................................................................................................................................................. 24

Alphabetical Command Listing .......................................................................................................................... 24

Alphabetical Command Listing .......................................................................................................................... 25

Alphabetical Command Listing (Cont.) .............................................................................................................. 26

Alphabetical Command Listing (Cont.) .............................................................................................................. 27

Alphabetical Command Listing (Cont.) .............................................................................................................. 28

Alphabetical Command Listing (Cont.) .............................................................................................................. 29

Command Dictionary .......................................................................................................................................... 30

IEEE 488.2 COMMON COMMANDS ......................................................................................................................... 32

*CLS ................................................................................................................................................................... 32

*ESE ................................................................................................................................................................... 33

*ESR? ................................................................................................................................................................. 34

*IDN? ................................................................................................................................................................. 35

*OPC .................................................................................................................................................................. 36

*RST ................................................................................................................................................................... 37

*SRE ................................................................................................................................................................... 38

*STB? ................................................................................................................................................................. 39

*TRG .................................................................................................................................................................. 40

*TST? ................................................................................................................................................................. 41

*WAI .................................................................................................................................................................. 42

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4 VM2164 Preface

INSTRUMENT SPECIFIC COMMANDS ................................................................................................ ........................ 43

ABORt ................................................................................................................................................................ 43

ARM([:SEQuence1]|[:STARt])[:LAYer]:DELay ............................................................................................... 44

ARM([:SEQuence1]|[:STARt])[:LAYer]:ECOunt ............................................................................................. 45

ARM([:SEQuence1]|[:STARt])[:LAYer]:IMMediate ........................................................................................ 46

ARM([:SEQuence1]|[:STARt])[:LAYer]:MODE ............................................................................................... 47

ARM([:SEQuence1]|[:STARt])[:LAYer]:SLOPe ............................................................................................... 48

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce ............................................................................................ 49

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]? ............................................................... 50

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable? ........................................................ 51

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed? ............................................................... 52

ARM(:SEQuence2|:STOP)[:LAYer]:DELay ...................................................................................................... 53

ARM(:SEQuence2|:STOP)[:LAYer]:ECOut ...................................................................................................... 54

ARM(:SEQuence2|:STOP)[:LAYer]:IMMediate ............................................................................................... 55

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce ................................................................................................... 56

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]? ...................................................................... 57

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable? .............................................................. 58

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed? ...................................................................... 59

CALCulate:AVERage? ................................................................ ................................................................ ....... 60

CALCulate:LIMit:ENVelope[:DATA] ............................................................................................................... 61

CALCulate:LIMit:FCOunt? ................................................................................................................................ 62

CALCulate:LIMit:LOWer[:DATA] ................................................................................................................... 63

CALCulate:LIMit:REPort[:DATA]? .................................................................................................................. 64

CALCulate:LIMit:UPPer[:DATA] ..................................................................................................................... 65

CALCulate:MAXimum? ..................................................................................................................................... 66

CALCulate:MEDian? ......................................................................................................................................... 67

CALCulate:MINimum? ...................................................................................................................................... 68

CALCulate:SDEViation? .................................................................................................................................... 69

CALCulate:TRANsform:HISTogram:ABOVe? ................................................................................................. 70

CALCulate:TRANsform:HISTogram:BELow? .................................................................................................. 71

CALCulate:TRANsform:HISTogram:COUnt .................................................................................................... 72

CALCulate:TRANsform:HISTogram:POINts .................................................................................................... 73

CALCulate:TRANsform:HISTogram:RANGe ................................................................................................... 74

CALCulate:TRANsform:HISTogram:RANGe:AUTO ....................................................................................... 75

CALCulate:TRANsform:HISTogram? ............................................................................................................... 76

CALCulate:VARiance? ...................................................................................................................................... 77

CALibration:COSCillator ................................................................................................................................... 78

CALibration:DAC:OFFSet ................................................................................................................................. 79

CALibration:DAC:SLOPE ................................................................................................................................. 80

CALibration:DEFault ......................................................................................................................................... 81

CALibration:SECure:CODE ............................................................................................................................... 82

CALibration:SECure[:STATe] ............................................................................................................................ 83

CALibration:STORe ........................................................................................................................................... 84

CALibration:TEC:OFFSet .................................................................................................................................. 85

CALibration:TEC:STARtslope ........................................................................................................................... 86

CALibration:TEC:STOPslope ............................................................................................................................ 87

CALibration:TINTerval:OFFSet ......................................................................................................................... 88

CONFigure[1|2](:SCALar]|:ARRay):NDUTy cycle|PDUTCycle|DCYCle ........................................................ 89

CONFigure[1|2](:SCALar]|:ARRay):NWIDth|PWIDth ..................................................................................... 90

CONFigure[1|2](:SCALar]|:ARRay):PHASe ..................................................................................................... 91

CONFigure[1|2](:SCALar]|:ARRay):TINTerval ................................................................................................ 93

CONFigure[1|2](:SCALar]|:ARRay)[:VOLTage][<volt_func>] ........................................................................ 94

CONFigure[1|2|3](:SCALar]|:ARRay):FREQuency ........................................................................................... 95

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VM2164 Preface

CONFigure[1|2|3](:SCALar]|:ARRay):FREQuency:RATio ................................................................ ............... 96

CONFigure[1|2|3](:SCALar]|:ARRay):PERiod .................................................................................................. 97

CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize ........................................................................................ 98

FETCh[<function>]? .......................................................................................................................................... 99

FETCh:COUNt? ............................................................................................................................................... 100

FETCh:TOTalize? ............................................................................................................................................ 101

FETCh[:VOLTage?] ......................................................................................................................................... 102

INITiate:CONTinuous ...................................................................................................................................... 103

INITiate[:IMMediate] ....................................................................................................................................... 104

INPut[1|2]:ATTenuation [DEFault | MINimum | MAXimum] ......................................................................... 105

INPut[1|2]:COMParator[1|2]:LEVel:RELative ................................................................................................ 106

INPut[1|2]:COMParator[1|2]:SLOPe [DEFault] ............................................................................................... 107

INPut[1|2]:COUPling ....................................................................................................................................... 108

INPut[1|2]:FILTer:FREQuency ........................................................................................................................ 109

INPut[1|2]:FILTer[:STATe] [DEFault] ............................................................................................................ 110

INPut[1|2]:IMPedance [DEFault] ................................................................ ................................ ..................... 111

INPut[1|2]:SETup ............................................................................................................................................. 112

INPut[1|2]:SETup:AUTO ................................................................................................................................. 113

INPut[1|2]:SETup:AUTO:TIMe ....................................................................................................................... 114

INPut[1|2]:SETup:TIMe ................................................................................................................................... 115

MEASure[1|2]([:SCALar]|:ARRay]:DCYCle|NDUTycycle|PDUTycycle? ................................ ...................... 116

MEASure[1|2]([:SCALar]|:ARRay):NWIDth|PWIDth? ................................................................................... 117

MEASure[1|2]([:SCALar]|:ARRay):PHASe? ................................................................................................... 118

MEASure[1|2]([:SCALar]|:ARRay):TINTerval? .............................................................................................. 120

MEASure[1|2]([:SCALar]|:ARRay)[:VOLTage][<volt_func>]? ...................................................................... 121

MEASure[1|2|3]([:SCALar]|:ARRay):FREQuency?......................................................................................... 122

MEASure[1|2|3]([:SCALar]|:ARRay):FREQuency:RATio? ............................................................................ 123

MEASure[1|2|3]([:SCALar]|:ARRay):PERiod? ................................................................................................ 124

MEASure[1|2|10|20][:SCALar]]:TOTalize? ..................................................................................................... 125

OUTPut:CLOCk ............................................................................................................................................... 126

OUTPut:TTLTrg .............................................................................................................................................. 127

OUTPut:TTLTrg:STATe.................................................................................................................................. 128

READ? ............................................................................................................................................................. 129

RESet ................................................................................................................................................................ 130

SENSe:APERture [DEFault | MINimum | MAXimum] .................................................................................... 131

SENSe:COUNt [DEFault | MINimum | MAXimum] ........................................................................................ 132

SENSe:EVENts ................................................................................................................................................ 133

SENSe:MODe .................................................................................................................................................. 134

SENSe:TINTerval:DELay:EVENTs ................................................................................................................ 135

SENSe:TINTerval:DELay:TIME ..................................................................................................................... 136

SENSe[1|2]:FUNCtion ..................................................................................................................................... 137

SENSe[1|2|3]:FUNCtion ................................................................................................................................... 138

SENSe[1|2|10|20]:FUNCtion ............................................................................................................................ 139

SOURce:COSCillator[:SOURce] ..................................................................................................................... 140

SOURce:COSCillator:VALue? ........................................................................................................................ 141

TEST? ............................................................................................................................................................... 142

TEST:ALL? ...................................................................................................................................................... 143

UNIT:ANGLe ................................................................................................................................................... 144

REQUIRED SCPI COMMANDS ................................................................................................................................ 145

STATus:OPERation:CONDition? .................................................................................................................... 145

STATus:OPERation:ENABle ........................................................................................................................... 146

STATus:OPERation:NTR ................................................................................................................................ 147

STATus:OPERation:PTR ................................................................................................................................. 148

STATus:OPERation[:EVENt]? ........................................................................................................................ 149

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6 VM2164 Preface

STATus:PRESet ............................................................................................................................................... 150

STATus:QUEStionable:CONDition? ............................................................................................................... 151

STATus:QUEStionable:ENABle ...................................................................................................................... 152

STATus:QUEStionable[:EVENt]? ................................................................................................................... 153

SECTION 4 ................................................................................................................................................................. 156

CALIBRATION AND VERIFICATION ......................................................................................................................... 156

Related Documents ........................................................................................................................................... 156

Equipment Used ................................................................................................................................................ 156

Method .............................................................................................................................................................. 157

1. Front End Calibration Procedure.............................................................................................................. 157

2. Calibrate DAC ................................................................................................................................ .......... 158

3. Calibrate TEC .......................................................................................................................................... 160

4. Time Interval Offset Calibration .............................................................................................................. 166

INDEX ........................................................................................................................................................................ 167

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VM2164 Preface

CERTIFICATION

VXI Technology, Inc. (VTI) certifies that this product met its published specifications at the time of shipment from the factory. VTI further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology (formerly National Bureau of Standards), to the extent allowed by that

organization’s calibration facility, and to the calibration facilities of other International Standards Organization

members.

WARRANTY

The product referred to herein is warranted against defects in material and workmanship for a period of three years

from the receipt date of the product at customer’s facility. The sole and exclusive remedy for breach of any warranty

concerning these goods shall be repair or replacement of defective parts, or a refund of the purchase price, to be determined at the option of VTI.

For warranty service or repair, this product must be returned to a VXI Technology authorized service center. The product shall be shipped prepaid to VTI and VTI shall prepay all returns of the product to the buyer. However, the buyer shall pay all shipping charges, duties, and taxes for products returned to VTI from another country.

VTI warrants that its software and firmware designated by VTI for use with a product will execute its programming when properly installed on that product. VTI does not however warrant that the operation of the product, or software or firmware will be uninterrupted or error free.

LIMITATION OF WARRANTY

The warranty shall not apply to defects resulting from improper or inadequate maintenance by the buyer, buyersupplied products or interfacing, unauthorized modification or misuse, operation outside the environmental specifications for the product, or improper site preparation or maintenance.

VXI Technology, Inc. shall not be liable for injury to property other than the goods themselves. Other than the limited warranty stated above, VXI Technology, Inc. makes no other warranties, express or implied, with respect to the quality of product beyond the description of the goods on the face of the contract. VTI specifically disclaims the implied warranties of merchantability and fitness for a particular purpose.

RESTRICTED RIGHTS LEGEND

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subdivision (b)(3)(ii) of the Rights in Technical Data and Computer Software clause in DFARS 252.227-7013.

VXI Technology, Inc. 2031 Main Street Irvine, CA 92614-6509 U.S.A.

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8 Preface

DE C L A R A T I O N O F C O N F O R M I T Y

Declaration of Conformity According to EN ISO/IEC 17050-1:2004

MANUFACTURER’S NAME VXI Technology, Inc.

MANUFACTURER’S ADDRESS 2031 Main Street

Irvine, California 92614-6509

PRODUCT NAME Counter/Timer

MODEL NUMBER(S) VM2164

PRODUCT OPTIONS All

PRODUCT CONFIGURATIONS All

VTI Instruments (formerly VXI Technology) declares that the aforementioned product conforms to the requirements of the Low Voltage directive (European Council directive 2014/35/EU, dated 22 July 1993) and the Electromagnetic Compatibility directive (European Council directive 2014/30/EU; generally referred to as the EMC directive). In substantiation, the products were tested and/or evaluated to the standards shown below:

SAFETY EN61010-1:2010

EMC EN61326-1:2013

EN55011 Class A Group 1 EN61000-4-2 EN61000-4-3 EN61000-4-4 EN61000-4-5 EN61000-4-6 EN61000-4-8 EN61000-4-11 CISPR 22

June 2016

Steve Mauga, QA Manager

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Preface 9

GENERAL SAFETY INSTRUCTIONS

Review the following safety precautions to avoid bodily injury and/or damage to the product. These precautions must be observed during all phases of operation or service of this product. Failure to comply with these precautions, or with specific warnings elsewhere in this manual, violates safety standards of design, manufacture, and intended use of the product.

Service should only be performed by qualified personnel.

TERMS AND SYMBOLS

These terms may appear in this manual:

WARNING

Indicates that a procedure or condition may cause bodily injury or death.

CAUTION

Indicates that a procedure or condition could possibly cause damage to equipment or loss of data.

These symbols may appear on the product:

ATTENTION - Important safety instructions

Frame or chassis ground

WARNINGS

Follow these precautions to avoid injury or damage to the product:

Use Proper Power Cord

To avoid hazard, only use the power cord specified for this product.

Use Proper Power Source

To avoid electrical overload, electric shock, or fire hazard, do not use a power source that applies other than the specified voltage.

Use Proper Fuse

To avoid fire hazard, only use the type and rating fuse specified for this product.

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10 Preface

WARNINGS (CONT.)

Avoid Electric Shock

To avoid electric shock or fire hazard, do not operate this product with the covers removed. Do not connect or disconnect any cable, probes, test leads, etc. while they are connected to a voltage source. Remove all power and unplug unit before performing any service. Service should only be

performed by qualified personnel.

Ground the Product

This product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground.

Operating Conditions

To avoid injury, electric shock or fire hazard:

Do not operate in wet or damp conditions.

Do not operate in an explosive atmosphere.

Operate or store only in specified temperature range.

Provide proper clearance for product ventilation to prevent overheating.

DO NOT operate if any damage to this product is suspected. Product should be inspected or serviced

only by qualified personnel.

Improper Use

The operator of this instrument is advised that if the equipment is used in a manner not specified in this manual, the protection provided by the equipment may be impaired. Conformity is checked by inspection.

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Preface 11

SUPPORT RESOURCES

Support resources for this product are available on the Internet and at VTI Instruments customer support centers.

VTI Instruments Corp. World Headquarters

VTI Instruments Corp. 2031 Main Street Irvine, CA 92614-6509

Phone: (949) 955-1894 Fax: (949) 955-3041

VTI Instruments Cleveland Instrument Division

5425 Warner Road Suite 13 Valley View, OH 44125

Phone: (216) 447-8950 Fax: (216) 447-8951

AMETEK Instruments Pvt. Ltd. India

4th Floor, Block A, Divyashree NR Enclave, EPIP Industrial Area, Whitefield, Bangalore – 560066 INDIA

Phone: +91 80 6782 3200 Fax: +91 80 6782 3232

Technical Support

Phone: (949) 955-1894 Fax: (949) 955-3041 E-mail: support@vtiinstruments.com

Visit http://www.vtiinstruments.com for worldwide support sites and service plan information.

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VM2164 Introduction

SECTION 1

INTRODUCTION

OVERVIEW

The VM2164 is a high-performance system level universal counter, designed to outperform traditional rack-and-stack and other C-size VXIbus counters, but with a considerably smaller footprint. A part of the VMIP (VXI Modular Instrumentation Platform) family of products, the VM2164 can be combined with up to two other high-performance instruments on a single C-Size card to form a customized and highly integrated instrument (see Figure 1-1).

This allows the user to reduce system size and cost by combining the VM2164 with two other instrument functions in a single-wide C-size VXIbus module. Up to three VM2164s can also be combined together on a single VXIbus card, making it an ideal choice for applications that require multi-signal measurement functions, such as in automotive or medical electronic test.

A powerful combination for any automated test set is our single VXIbus module, VT2000 combining a 6.5 digit system DMM (VM2710A), a 200 MHz 1 ns universal counter (VM2164) and a 50 MSample/s arbitrary waveform/function generator (VM3640A). Our single-slot timer counter (VM2164) plus a Rubidium standard (VM3000) is another powerful combination.

V X

I B U S

I N T E R N A L

I P

B U S

VMIP

INTERFACE

VMIP

INSTRUMENT

MODULE #1

VMIP

INSTRUMENT

MODULE #2

VMIP

INSTRUMENT

MODULE #3

FIGURE 1-1 THE VMIP

™

PLATFORM

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14 VM2164 Introduction

Each VM2164 Counter/Timer is treated as an independent instrument in the VXIbus chassis. Each has its own unique Logical Address and its own front panel FAIL and ACC indicators. The ACC (ACCESS) LED flashes when read/write commands are being sent to the module. The FAIL LED glows green to indicate that the board is receiving power. This LED glows red when a fail condition has occurred.

PROGRAMMING

The VM2164 is programmed using message-based word serial protocol. The commands are SCPI and IEEE-STD-488-2 compatible. VXIplug&play drivers are also provided to further ease programming.

CALIBRATION

The calibration constants used to correct the data values are stored in non-volatile memory and are password protected for security. These constants are determined when the instrument is calibrated and can be changed as necessary. These constants may also be queried at any time via a word-serial query and altered via a word-serial command (with the password). All calibration is done using calibration DACs to adjust the gain and offset of each channel. This eliminates the need for removing covers from the unit and allows for automated calibration.

FIGURE 1-2 FRONT PANEL LAYOUT

CHANNEL 3 INPUT (Optional)

CHANNEL 1 INPUT

CHANNEL 2 INPUT

EXTERNAL REFERENCE OUTPUT

EXTERNAL REFERENCE INPUT

EXTERNAL ARM INPUT

bus

FAIL

ACC

FAIL

ACC

FAIL

ACC

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VM2164 Introduction 15

BUILT-IN SOFTWARE FUNCTIONS

BUILT IN SOFTWARE FUNCTIONS

• Auto-Level

• Pulse Characterization

• Period

• Frequency

• Positive Pulse Width

• Negative Pulse Width

• Positive Duty Cycle

• Burst Frequency

• Rise Time

• Fall Time

• Burst Characterization

• BIT (Built-In Test)

• Clock On/Off – In/Out

FEATURES

FREQUENCY

Frequency Frequency Ratio Frequency in Bursts Channel 3

PERIOD AND TIME

Period (Single) Period (Average) Positive Pulse Width Negative Pulse Width Rise Time Fall Time Time Interval Time Interval Average

PHASE

VOLTAGE

VDC V

P-P

MAX

MIN

ARMING

Arm Source Arm Slope Trigger Level Arming Start Delay Hold Off Burst Sync Delay

Ch 1, Ch 2, Ext, VXI TTLT Positive, Negative Fixed (approximately TTL) Events/Timed Timed Timed

MEASUREMENT STORAGE

Standard

1000 measurements

POSITIVE / NEGATIVE DUTY CYCLE

TOTALIZE

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16 VM2164 Introduction

GENERAL SPECIFICATIONS

INPUT SPECIFICATIONS

CHANNEL 1 & 2

Impedance

1 MΩ20 pF 50 Ω20 pF

Frequency Range

DC Coupled AC Coupled

DC – 200 MHz 20 Hz – 200 MHz

50 kHz 155 kHz

Sensitivity

20 mVrms – up to 50 MHz 40 mVrms – 50 MHz to 200 MHz 100 mV

P-P

– 5 to 10 ns pulse

50 mV

P-P

– Greater than 10 ns pulse

10x

200 mVrms – up to 50 MHz 400 mVrms – 50 MHz to 200 MHz

1.0 V

P-P

– 5 to 10 ns pulse

500 mV

P-P

– Greater than 10 ns pulse

Crosstalk

< -36 dB at 100 MHz into 50 Ω

Input Damage Level

1x / 10x

50 Ω Input

240 Vrms (DC + ACrms) to 2 kHz linearly derated to 5 Vrms at 100 kHz. 5 Vrms above 100 kHz 5 Vrms – DC to 200 MHz

Trigger Level Range

10x

±5.0 V ±50 V

Trigger Level Resolution

2.5 mV

10x

25 mV

Trigger Sensitivity

20 mVrms Sine Wave (< 50 MHz) 40 mVrms Sine Wave (50 MHz to 200 MHz)

10x

200 mVrms Sine Wave (< 50 MHz) 400 mVrms Sine Wave (50 MHz to 200 MHz)

Auto-Trigger

Automatically set to the 50% point between the signal’s peak-to-peak levels. The signal’s 10% and 90% points are sued for rise and fall

time measurements.

Trigger Error (seconds)

pointTrigger @ rate SlewInput

Signal

2 Input



, (E

Signal

is the input signal noise)

Input

(RMS Noise of the Input)

1x 10x

 2 mVrms, (500 μVrms typical)  20 mVrms, (5 mVrms typical)

Trigger Level Timing Error

Stopat Rate SlewInput

mV 12.5

Startat Rate SlewInput

mV 12.5



10x

Stopat Rate SlewInput

mV 125

Startat Rate SlewInput

mV 125



Base Resolution and Accuracy

res

50 ps

acc

0.4 ns typical, 0.8 ns worst case

Differential Channel Error

100 ps

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VM2164 Introduction 17

CHANNEL 3 INPUT (OPTION 17)

Frequency Range

150 MHz to 3.0 GHz

Sensitivity 150 MHz – 2.4 GHz

2.4 GHz – 3.0 GHz

-25 dBm to +19 dBm

-19 dBm to +19 dBm

Impedance

50 Ω

Input Coupling

Input Damage Level

5 Vrms

EXTERNAL REFERENCE OUTPUT

Frequency

10 MHz

Coupling

Output Impedance

50 Ω

Output Level Low

 0.8 V into > 10 kΩ

Output Level High

 4.2 V into > 10 kΩ

Gate Time

Programmable from 200 μs to 99.9999 s

EXTERNAL REFERENCE INPUT

Frequency

10 MHz

Coupling

Input Impedance

1 kΩ

Voltage Range

500 mVrms to 12 Vrms

Input Damage Level

15 Vrms

EXTERNAL ARM INPUT

Coupling

Impedance

1 kΩ

Input Threshold

1.3 V fixed

Input Signal Level

 500 mV

P-P

about the input threshold

Pulse Width

 50 ns

Transition Time

 250 ns

TTL TRIGGER BUS ARMING

Input

Any VXIbus TTL Trigger line may be selected for arming (Rising or Falling edge sensitive)

Output

Any VXIbus TTL Trigger line may be selected to follow the measurement gate signal (polarity is programmable)

MEASUREMENTS

FREQUENCY MEASUREMENTS

Input 1 & 2 Range

500 μHz to 200 MHz (DC coupled) 20 Hz to 200 MHz (AC coupled)

Input 1 & 2 Resolution

 

Time Gate

Error)Trigger (StopError)Trigger (Start t

Frequency

222

res





Input 1 & 2 Systematic Error

 



 





GateTime

Error Base Time Frequency

acc

Input 3 Frequency Range

150 MHz to 2.5 GHz

Input 3 Resolution

 

















Time Gate

Error)Trigger (StopError)Trigger (Start t

Frequency 32

222

res

Input 3 Systematic Error



 





 



 



 





GateTime

Error Base Time Frequency 32

acc

Accuracy

 

















 





 





INPUTINPUT

Time Gate

Error Systematic

Error Base Time Resolution ff

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18 VM2164 Introduction

FREQUENCY RATIO

Input 1 & 2 Range

500 μHz to 200 MHz (DC coupled) 20 Hz to 200 MHz (AC coupled)

Results Range

CH1

CH2

CH1

2.5 x 10

-12

to 4.0 x 1011

Resolution

CH2

CH1

1Count

Count

CH2

CH1

CH2

CH1



Resolution

CH1

CH2

Count

1Count

Count

CH1

CH2

CH1

CH2



Input 3 Range

150 MHz to 2.5 GHz

Results Range

CH3

CH2

CH3

CH1

CH2

CH3

CH1

CH3

,,,

2.0 x 10

-13

to 5.0 x 1012

Resolution

CH3

CH2

CH3

CH1

32Count

Count

CH3

CH2or CH1

CH3

CH2or CH1



Resolution

CH2

CH3

CH1

CH3

1Count

Count

CH2or CH1

CH3

CH2or CH1

CH3



PERIOD MEASUREMENT

Input 1 & 2 Range

5 ns to 2000 s

Resolution

 

222

res

Error)Trigger (StopError)Trigger (Start t 

Systematic Error

 



 





Time Gate

Error Base TimePeriod

acc

PHASE MEASUREMENT

Range

0° to 360° or -180° to +180°

Resolution

 

 



 





 



 



 







res

360

Phase

1ErrorTrigger 4t360Frequency

Systematic Error

 



 



 Error Channel alDifferenti

Time Phase

Period

ErrorTrigger 360Frequency

accacc

TIME INTERVAL MEASUREMENTS

Range

2 ns to 1 x 106 s

Resolution – Single Shot

 

222

res

Error)Trigger (StopError)Trigger (Start t 

Systematic Error

 



 



 Error Channel alDifferenti

Interval Time

Error Base TimeInterval Time

acc

PULSE WIDTH MEASUREMENT

Range

5 ns to 20 ms

Resolution – Single Shot

 

 

222

res

Error Timing LevelTrigger Error)Trigger (StopError)Trigger (Start t 

Systematic Error

 



 





Width

Error Base TimeWidth

acc

Accuracy

 



 





 







 





 



 WidthPulse

Error Systematic

WidthPulseError Base Time Resolution

RISE AND FALL TIME MEASUREMENT

Range

10 ns to 1000 s

Resolution – Single Shot

 

 

222

res

Error Timing LevelTrigger Error)Trigger (StopError)Trigger (Start t 

Systematic Error

 



 





Interval Time

Error Base TimeInterval Time

acc

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VM2164 Introduction 19

DC VOLTAGE MEASUREMENT

Range

±4 V

10x

±40 V

Resolution

2.5 mV

10x

25 mV

Accuracy

±12.5 mV

10x

±125 mV

PEAK VOLTAGE MEASUREMENT

Range

±5 V

10x

±50 V

Resolution

2.5 mV

10x

25 mV

Accuracy

±12.5 mV

10x

±125 mV

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20 VM2164 Introduction

OSCILLATOR SPECIFICATIONS

NO OSCILLATOR – USE VXI 10 MHZ

Performance

±100 ppm

EX2500A

Performance

±50 ppm

TCXO – STANDARD

Performance

High Performance

Aging

±1 x 10-6/year

Temperature

±3 x 10-6 (0°C to 50°C)

Adjustment Range

±3 x 10-6 minutes

Warm Up Time

N/A

OCXO – OPTION 16

Performance

Ultra High Performance

Aging

±1 x 10-7/year ±1 x 10-9/day

Temperature

±1 x 10-7 (0°C to 50°C)

Adjustment Range

±4 x 10-7 minutes

Warm Up Time

< 3 minutes

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VM2164 Preparation for Use 21

SECTION 2

PREPARATION FOR USE

INTRODUCTION

When the VMIP is unpacked from its shipping carton, the contents should include the following items:

(1) VMIP VXIbus module (1) VM2164 Counter / Timer User’s Manual (this manual)

All components should be immediately inspected for damage upon receipt of the unit.

The chassis should be checked to ensure that it is capable of providing adequate power and cooling for the VMIP. Once the chassis is found adequate, the VMIP’s logical address and the chassis’ backplane jumpers should be configured prior to the VMIP’s installation. Once these steps are complete, it may then be installed into an appropriate chassis in any slot other than slot zero.

CALCULATING SYSTEM POWER AND COOLING REQUIREMENTS

It is imperative that the chassis provide adequate power and cooling for this module. Referring to the chassis operation manual, confirm that the power budget for the system (the chassis and all modules installed therein) is not exceeded and that the cooling system can provide adequate airflow at the specified backpressure.

It should be noted that if the chassis cannot provide adequate power to the module, the instrument might not perform to specification or possibly not operate at all. In addition, if adequate cooling is not provided, the reliability of the instrument will be jeopardized and permanent damage may occur. Damage found to have occurred due to inadequate cooling will also void the module's warranty.

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22 VM2164 Preparation for Use

SETTING THE CHASSIS BACKPLANE JUMPERS

Please refer to the chassis operation manual for further details on setting the backplane jumpers.

SETTING THE LOGICAL ADDRESS

The logical address of the VM2164 is set by a single 8-position DIP switch located near the VMIP module’s backplane connectors (this is the only switch on the module). The switch is labeled with positions 1 through 8 and with an ON position. A switch pushed toward the ON legend will signify a logic 1; switches pushed away from the ON legend will signify a logic 0. The switch located at position 1 is the least significant bit while the switch located at position 8 is the most significant bit. See Figure 2-1 for examples of setting the logical address switch.

SET TO 4

1ON2 3 4 5 6 7 8

SET TO 168

1 2 3 4 5 6 7 8

SET TO 8

1ON2 3 4 5 6 7 8

SET TO 255

ON ON

2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

Switch

Position

1 2 4

8 16 32 64

128

Switch

Value

ON ON

(Dynamic)

FIGURE 2-1 LOGICAL ADDRESS SWITCH SETTING EXAMPLES

The VMIP may contain three separate instruments and will allocate logical addresses as required by the VXIbus specification (revisions 1.3 and 1.4). The logical address of the instrument is set on the VMIP carrier. The VMIP logical addresses must be set to an even multiple of 4 unless dynamic addressing is used. Switch positions 1 and 2 must always be set to the OFF position. Therefore, only addresses of 4, 8, 12, 16, ...252 are allowed. The address switch should be set for one of these legal addresses and the address for the second instrument (the instrument in the center position) will automatically be set to the switch set address plus one; while the third instrument (the instrument in the lowest position) will automatically be set to the switch set address plus two. If dynamic address configuration is desired, the address switch should be set for a value of 255 (All switches set to ON). Upon power-up, the slot 0 resource manager will assign the first available logical addresses to each instrument in the VMIP module.

If dynamic address configuration is desired, the address switch should be set for a value of 255. Upon power-up, the slot 0 resource manager will assign logical addresses to each instrument in the VMIP module.

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VM2164 Command Dictionary 23

SECTION 3

COMMAND DICTIONARY

INTRODUCTION

This section presents the instrument command set. It begins with an introduction to the Standard Commands for Programmable Instruments (SCPI) programming language, detailing proper syntax and explaining SCPI nomenclature. The introduction is then followed by an alphabetical listing of all the commands supported by the VM2164 Counter/Timer. The remainder of this section is devoted to describing each command, one per page, in detail. The description is presented in a way to assist the user in the use of each command. Every command entry describes the exact command and/or query syntax, the use and range of parameters, and a description of the command’s purpose.

THE SCPI PROGRAMMING LANGUAGE

The VM2164 is a VXIbus message-based device whose command set is compliant with the SCPI programming language. All module commands are sent over the VXIbus backplane to the module. Commands may be in upper, lower or mixed case. All numbers are sent in ASCII decimal unless otherwise noted.

The SCPI programming language is a tree-structured language based on IEEE-STD-488.2 Specifications. It utilizes the IEEE-STD-488.2 Standard command and the device dependent commands are structured to allow multiple branches off the same trunk to be used without repeating the trunk. To use this facility, terminate each branch with a semicolon. For example,

CALibration:SECure:CODE and CALibration:SECure:STATe are both branches off the CALibration: trunk and can be combined as follows:

CALibration:SECure:CODE <string>;STATe <boolean>,<string>

The above command is the same as the these two commands:

CALibration:SECure:CODE <string> CALibration:SECure:STATe <boolean>,<string>

See the Standard Commands for Programmable Instruments (SCPI) Manual, Volume 1: Syntax & Style, Section 6, for more information.

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24 VM2164 Command Dictionary

The SCPI commands in this section are listed in upper and lower case. Character case is used to indicate different forms of the same command. Keywords can have both a short form and a long form (some commands only have one form). The short form uses just the keyword characters in uppercase. The long form uses the keyword characters in uppercase plus the keyword characters in lowercase. Either form is acceptable. Note that there are no intermediate forms. All characters of the short form or all characters of the long form must be used. Short forms and long forms may be freely intermixed. The actual commands sent can be in upper case, lower case or mixed case (case is only used to distinguish short and long form for the user). As an example, these commands are all correct and all have the same effect:

CALibration:SECure:CODE <string>

calibration:secure:code <string> CALIBRATION:SECURE:CODE <string> CAL:SECure:CODE <string> CAL:SEC:CODE <string> cal:sec:code <string>

The following command is not correct because it uses part of the long form of CALibration, but not all the characters of the long form:

calib:sec:code <value> (incorrect syntax - extra "ib"- only cal or

calibration is correct)

All of the SCPI commands also have a query form unless otherwise noted. Query forms contain a question mark (?). The query form allows the system to ask what the current setting of a parameter is. The query form of the command generally replaces the parameter with a question mark (?). Query responses do not include the command header. This means only the parameter is returned: no part of the command or "question" is returned.

NOTATION

Keywords or parameters enclosed in square brackets ([ ]) are optional. If the optional part is a keyword, the keyword can be included or left out. Omitting an optional parameter will cause its default to be used.

Parameters are enclosed by angle brackets (< >). Braces ({ }), or curly brackets, are used to enclose one or more parameters that may be included zero or more times. A vertical bar (|), read as "or", is used to separate parameter alternatives.

ALPHABETICAL COMMAND LISTING

The tables on the pages that follow provide an alphabetical listing of each command supported by the VM2164 Counter/Timer along with a brief definition. If an X is found in the column titled “*RST” (Reset), then the value or setting controlled by this command is possibly changed by the execution of the *RST command. If an X is not found, then the *RST has no effect. The *RST value is provided with each command. This value is set when the unit is powered up or when an *RST or a RESet command is executed. Note that calibration values revert to the values stored in non-volatile memory upon reset. Using the CALibration:DEFault command will return calibration values back to known, factory preset values. In order for CALibration commands/queries to be executed, calibration security must be turned off. If security is not turned off, a “-203, Command

Protected” error will be returned. See CALibration:SECure:CODE for information on calibration

security.

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ALPHABETICAL COMMAND LISTING

Command

Description

*RST

*RST Value

*CLS

Clears all status and event registers.

*ESE

Sets the bits of the Event Status Enable Register.

*ESR?

Queries and clears the Standard Event Status Register.

*IDN?

Queries the module for its identification string.

*OPC

Sets the OPC bit in the Event Status Register.

*RST

Resets the module’s hardware and software to a known state.

*SRE

Sets the service request enable register.

*STB?

Queries the Status Byte Register.

*TRG

Causes a trigger event to occur.

*TST?

Causes a self-test procedure to occur and queries the results.

*WAI

Halts execution of additional commands and queries until the No Operation Pending message is true.

ABORt

This command aborts any actions in process.

ARM([:SEQuence1]|[:STARt])[:LAYer]:DELay

Specifies a time delay to occur after the receipt of an arm signal before actually arming the counter.

0.000000000000000e+00

ARM([:SEQuence1]|[:STARt])[:LAYer]:ECOunt

Specifies the number of arm signals to count prior to arming the counter.

0.000000000000000e+00

ARM([:SEQuence1]|[:STARt])[:LAYer]:IMMediate

To create a one time entry by the counter into the armed state.

ARM([:SEQuence1]|[:STARt])[:LAYer]:MODE

If the counter has been configured for an array measurement, this command specifies whether the counter will perform one or all operations when an ARM command is received.

ALL

ARM([:SEQuence1]|[:STARt])[:LAYer]:SLOPe

Specifies the slope of the counter external arm signal.

POS

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce

Selects or queries the start arming source.

IMM

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]?

Lists all trigger sources available for use with the ARM:SOUR command.

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable?

Lists all delayable trigger sources available for use with the ARM:SOUR command.

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

Lists all fixed trigger sources available for use with the ARM:SOUR command.

ARM(:SEQuence2|:STOP)[:LAYer]:DELay

Specifies a time delay to occur after receipt of a stop arm signal prior to actually disarming the counter.

0.000000000000000e+00

ARM(:SEQuence2|:STOP)[:LAYer]:ECOunt

Specifies the number of stop arm signals the instrument will count prior to disarming the counter.

0.000000000000000e+00

ARM(:SEQuence2|:STOP)[:LAYer]:IMMediate

Causes a one-time exit by the counter from the armed state.

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce

Selects or queries the stop arming source to be used when the counter is initiated.

IMM

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]?

Lists all trigger sources available for use with the ARM:STOP:SOUR command.

See command for possible query responses

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable?

Lists all fixed trigger sources available for use with the ARM:STOP:SOUR command.

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

Lists all delayable trigger sources available for use with ARM:STOP:SOUR command.

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ALPHABETICAL COMMAND LISTING (CONT.)

Command

Description

*RST

*RST Value

CALCulate:AVERage?

This query calculates the average of a specified number of measurements in the memory buffer.

CALCulate:LIMit:ENVelope[:DATA]?

This command searches for all the input data values within an envelope of values defined as being above, below, or in between as set boundary of values.

-9.989999999999990e+99,

-9.989999999999990e+99

CALCulate:LIMit:FCOunt?

This query performs a limit test on the current available data.

CALCulate:LIMit:LOWer[:DATA]?

Searches for all the input data values below a certain <threshold>.

-9.989999999999990e+99

CALCulate:LIMit:REPort[:DATA]?

This query returns the <memory_index> and <failed_value> values collected.

CALCulate:LIMit:UPPer[:DATA]?

Searches for all the input data values above a certain <threshold>.

-9.989999999999990e+99

CALCulate:MAXimum?

This query calculates and returns the maximum value of a set of data.

CALCulate:MEDian?

This query calculates and returns the median value of a set of data.

CALCulate:MINimum?

This query calculates and returns the minimum value of a set of data.

CALCulate:SDEViation?

This query calculates and returns the standard deviation for a set of data.

CALCulate:TRANsform:HISTogram:ABOVe?

This query returns the number of points above the maximum value in a histogram calculation.

CALCulate:TRANsform:HISTogram:BELow?

This query returns the number of points below the minimum value in a histogram calculation.

CALCulate:TRANsform:HISTogram:COUnt?

Determines the number of data points to include in a histogram calculation.

X 1 CALCulate:TRANsform:HISTogram:POINts?

Sets the number of intervals in a histogram calculation.

CALCulate:TRANsform:HISTogram:RANGe?

Sets the minimum and maximum values to use in a histogram calculation.

-9.989999999999990e+99,

-9.989999999999990e+99

CALCulate:TRANsform:HISTogram:RANGe:AUTO?

This command sets the minimum and maximum values to use in a histogram calculation.

CALCulate:TRANsform:HISTogram?

This query calculates and returns the histogram for a set of data.

CALCulate:VARiance?

This query calculates and returns the variance for a set of data.

CALibration:COSCillator

Calibrates the reference oscillator. (Must have Option 15 or Option 16 installed)

Assumes the last

value stored in

non-volatile memory

CALibration:DAC:OFFSet

Calibrates one of the two factors used by the DAC.

CALibration:DAC:SLOPE

Calibrates one of two factors used by the DAC.

CALibration:DEFault

Initializes calibration values to known values.

CALibration:SECure:CODE

Sets the code required to disable calibration security.

CALibration:SECure[:STATe]

Enable or disable calibration security.

CALibration:STORe

Stores calibration data into non-volatile memory.

CALibration:TEC:OFFSet

Calibrates one of three factors used by the TEC circuitry.

CALibration:TEC:STARtslope

Calibrates one of three factors used by the TEC circuitry.

CALibration:TEC:STOPslope

Calibrates one of three factors used by the TEC circuitry.

CALibration:TINTerval:OFFSet

This command compensates for the differences between Channel 1 and Channel 2.

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ALPHABETICAL COMMAND LISTING (CONT.)

Command

Description

*RST

*RST Value

CONFigure[1|2](:SCALar]|:ARRay):NDUTy cycle|PDUTCycle|DCYCle

This command configures a positive or negative duty cycle measurement.

Array size = 1 Dcycle Reference = 50

CONFigure[1|2](:SCALar]|:ARRay):NWIDth|PWIDth

This command configures the counter to measure the positive or negative pulse width time of the signal on the CONFigure suffix input channel.

Array size = 1 Dcycle Ref = 50

CONFigure[1|2](:SCALar]|:ARRay):PHASe

This command configures a phase measurement.

This command configures the counter to measure the rise or fall time of the signal on the CONFigure suffix input channel.

Array size = 1 Low Reference = 10 High Reference = 90

CONFigure[1|2](:SCALar]|:ARRay):TINTerval

This command sets the counter to make a time interval measurement.

CONFigure[1|2](:SCALar]|:ARRay)[:VOLTage]:[:…]

These commands configure the counter to measure the voltage on the CONFigure suffix input channel.

CONFigure[1|2|3](:SCALar]|:ARRay):FREQuency

This command configures the counter to measure the frequency of the signal on the CONFigure suffix input channel.

CONFigure[1|2|3](:SCALar]|:ARRay):FREQuency:RATio

This command configures the counter to measure the ratio of the frequencies of the signals on the CONFigure suffix input channel and <second channel>.

CONFigure[1|2|3](:SCALar]|:ARRay):PERiod

This command configures the counter to measure the period of the signal on the CONFigure suffix input channel.

CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize

This command configures a totalized measurement.

FETCh[:…]?

This query returns the values of measurements.

FETCh:COUNt?

This query returns the number of measurements completed.

X 0 FETCh:TOTalize?

This query returns the total counts from Channel 1 and 2

FETCh:[:VOLTage][:…]?

This query sets up to return the results of the pervious voltage measurement.

INITiate:CONTinuous

Verifies whether the counter is taking continuous measurements.

0 if not continuous, 1 if continuous

INITiate[:IMMediate]

This command initiates the current trigger sequence.

INPut[1|2]:ATTenuation

This command sets the input block signal attenuator for the specified channel.

INPut[1|2]:COMParator[1|2]:LEVel:RELative

This command sets the comparator threshold level voltage of the channel and comparator selected.

INPut[1|2]:COMParator[1|2]:SLOPe

This command sets the slope for the selected input channel and comparator.

POS

INPut[1|2]:COUPling

This command sets the input block signal coupling for the specified channel AC or DC.

INPut[1|2]:FILTer[:FREQuency]

This command sets the frequency of the low pass filter.

20e6 below 30 MHz 100e6 at or above 30 MHz

INPut[1|2]:FILTer[:STATe]

This command sets the input block signal low-pass filter state for the selected channel to ON or OFF.

INPut[1|2]:IMPedance

This command sets the input terminating impedance for the specified channel.

1000000.000000 (1e6)

INPut[1|2]:SETup

This command sets up Input Channel 1 or 2 by specifying an expected peak-topeak input voltage and optionally an expected input offset voltage.

INPut[1|2]:SETup:AUTO

This command controls the auto setup of Input Channels 1 and 2.

ONCE

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ALPHABETICAL COMMAND LISTING (CONT.)

Command

Description

*RST

*RST Value

INPut[1|2]:SETup:AUTO:TIMe

This command sets the duration of time that will be allowed for a signal to occur before a measurement is aborted when autotriggered.

0.02

INPut[1|2]:SETup:TIMe

This command sets the duration of time after an INITiate command that will be allowed for a signal to occur before a measurement is aborted.

0.04

MEASure[1|2]([:SCALar]|:ARRay]:DCYCle|NDUTycycle|PDUTycycle?

This query performs a positive or negative duty cycle measurement.

MEASure[1|2]([:SCALar]|:ARRay):NWIDth|PWIDth?

This query configures the counter to measure the positive or negative pulse width time of the signal on the MEASure suffix input channel.

MEASure[1|2]([:SCALar]|:ARRay):PHASe?

This query performs a phase measurement.

This query configures the counter to measure the rise and or fall time of the signal on the MEASure suffix input channel.

Array size = 1 Low reference = 10 High reference = 90

MEASure[1|2]([:SCALar]|:ARRay):TINTerval?

Sets the counter to make a time interval measurement and fetch the result.

MEASure[1|2]([:SCALar]|:ARRay)[:VOLTage][:…]?

These queries configure the counter to measure the voltage on the MEASure suffix input channel.

MEASure[1|2|3]([:SCALar]|:ARRay):FREQuency?

Configures the counter to measure the frequency of the signal on the MEASure suffix input channel.

MEASure[1|2|3]([:SCALar]|:ARRay):FREQuency:RATio?

This query configures the counter to measure the ratio of the frequencies of the signals on the MEASure suffix input channel and <second channel>.

MEASure[1|2|3]([:SCALar]|:ARRay):PERiod?

Configures the counter to measure a period of the signal on the MEASure suffix input channel.

MEASure[1|2|10|20][:SCALar]]:TOTalize?

This query performs a totalize measurement.

OUTPut:CLOCk

This command toggles the External Reference as a useable reference clock.

OUTPut:TTLTrg

This command selects the TTL trigger line that will receive the output.

OUTPut:TTLTrg:STATe

This command toggles the use of TTL trigger lines as usable outputs.

READ?

This query causes an INITiate:IMMediate action and a FETCh? query.

RESet

Resets the module’s hardware and software to a known state.

SENSe:APERture

This command sets the counter measurement aperture <time>.

0.100000

SENSe:COUNt

This command sets the counter to do <array size> number of measurements.

X 1 SENSe:EVENts

This command sets the counter <# of events>.

1000

SENSe:MODe

This command sets the counter to make a measurement for a length of time (APERture) or for a number of cycles of the input signal (EVENTs).

APER

SENSe[1,2]:FUNCtion

This command selects a function and input channel without changing most of the setup of the counter.

FREQ

SENSe[1|2|3]:FUNCtion

The SENSe:FUNCtion command selects a function and input channel without changing most of the counter setup.

FREQ

SENSe[1|2|10|20]:FUNCtion

The SENSe:FUNCtion command selects a function and input channel without changing most of the counter setup.

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ALPHABETICAL COMMAND LISTING (CONT.)

Command

Description

*RST

*RST Value

SOURce:COSCillator[:SOURce]

The SOURce subsystem commands are used to command the TCXO1 option (if available).

ROSC, if Option 15 is used, then TCXO1 is returned

SOURce:COSCillator:VALue?

This query returns the current oscillator frequency.

9.9999999999e+06

TEST?

Performs an internal communication test.

TEST:ALL?

The Test subsystem handles the self test operations of the instrument.

UNIT:ANGLe

The UNIT subsystem command specifies the units for the phase measurements as either degrees or radians and determines whether the units will be positive or centered around zero.

Unit = RAD Zero = MIN

STATus:OPERation:CONDition?

The STATus:OPERation:CONDition query returns the current operational status of the counter.

STATus:OPERation:ENABle

Sets the Questionable Status Enable Register.

STATus:OPERation:NTR

Sets the negative transition filter.

STATus:OPERation:PTR

Sets the positive transition filter.

STATus:OPERation[:EVENt]?

Queries the Operation Status Register's event register.

STATus:PRESet

Presets the Status Registers.

STATus:QUEStionable:CONDition?

Queries the Questionable Status Condition Register.

STATus:QUEStionable:ENABle

Sets the Questionable Status Enable Register.

STATus:QUEStionable[:EVENt]?

Queries the Questionable Status Event Register.

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30 VM2164 Command Dictionary

COMMAND DICTIONARY

The remainder of this section is devoted to the actual command dictionary. Each command is fully described on its own page. In defining how each command is used, the following characteristics are used:

Purpose

Describes the purpose of the command.

Type

Describes the type of event, such as type or setting.

Command Syntax

Details the exact command format

Command Parameters

Describes the parameters sent with the command and their legal parameters

*RST Value

Describes the value assumed when the *RST (reset) command is sent.

Query Syntax

Details the exact query form of the command.

Query Parameters

Describes the parameters sent with the command and their legal range. The default parameter values are assumed the same as in the command form unless described otherwise.

Query Response

Describes the format of the query response and the valid range of output.

Description

Describes in detail what the command does and refers to additional sources.

Examples

Presents the proper use of each command and its query (when available).

Related Commands

Lists commands that affect the use of this command or commands that are affected by this command.

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32 VM2164 Command Dictionary

IEEE 488.2 COMMON COMMANDS

*CLS

Purpose

Clears all status and event registers

Type

IEEE 488.2 Common Command

Command Syntax

*CLS

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

This command clears the Status Event Register, Operation Status Register and the Questionable Data/Signal Register. It also clears the OPC flag and clears all queues (except the output queue).

Examples

Command / Query

Response (Description)

*CLS

(Clears all status and event registers)

Related Commands

N/A

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VM2164 Command Dictionary 33

*ESE

Purpose

Sets the bits of the Event Status Enable Register

Type

IEEE 488.2 Common Command

Command Syntax

*ESE <mask>

Command Parameters

<mask> = numeric ASCII value

*RST Value

N/A – required parameter

Query Syntax

*ESE?

Query Parameters

N/A

Query Response

Numeric ASCII value from 0 to 255

Description

The Event Status Enable (ESE) command is used to set the bits of the Event Status Enable Register. See ANSI/IEEE 488.2-1987 section 11.5.1 for a complete description of the ESE register. A value of 1 in a bit position of the ESE register enables generation of the Event Status Bit (ESB) in the Status Byte by the corresponding bit in the Event Status Register (ESR). If the ESB is set in the Service Request Enable (SRE) register, then an interrupt will be generated. See the *ESR? command for details regarding the individual bits. The ESE register layout is:

Bit 0 - Operation Complete Bit 1 - Request Control Bit 2 - Query Error Bit 3 - Device Dependent Error Bit 4 - Execution Error Bit 5 - Command Error Bit 6 - User Request Bit 7 - Power On

The Event Status Enable query reports the current contents of the Event Status Enable Register.

Examples

Command / Query

Response (Description)

*ESE 36

*ESE?

36 (Returns the value of the event status enable register)

Related Commands

*ESR?

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*ESR?

Purpose

Queries and clears the Standard Event Status Register

Type

IEEE 488.2 Common Command

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

*ESR?

Query Parameters

N/A

Query Response

Numeric ASCII value from 0 to 255

Description

The Event Status Register (ESR) query - queries and clears the contents of the Standard Event Status Register. This register is used in conjunction with the ESE register to generate the Event Status Bit (ESB) in the Status Byte. The layout of the ESR is:

Bit 0 - Operation Complete Bit 1 - Request Control Bit 2 - Query Error Bit 3 - Device Dependent Error Bit 4 - Execution Error Bit 5 - Command Error Bit 6 - User Request Bit 7 - Power On

The Operation Complete bit is set when it receives an *OPC command.

The Query Error bit is set when data is over-written in the output queue. This could occur if one query is followed by another without reading the data from the first query.

The Execution Error bit is set when an execution error is detected. Errors that range from -200 to -299 are execution errors.

The Command Error bit is set when a command error is detected. Errors that range from -100 to -199 are command errors.

The Power On bit is set when the module is first powered on or after it receives a reset via the VXI Control Register. Once the bit is cleared (by executing the *ESR? command) it will remain cleared.

Examples

Command / Query

Response (Description)

*ESR?

Related Commands

*ESE

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VM2164 Command Dictionary 35

*IDN?

Purpose

Queries the module for its identification string

Type

IEEE 488.2 Common Command

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

*IDN?

Query Parameters

N/A

Query Response

ASCII character string

Description

The Identification (IDN) query returns the identification string of the module. The response is divided into four fields separated by commas. The first field is the

manufacturer’s name, the second field is the model number, the third field is an

optional serial number and the fourth field is the firmware revision number. If a serial number is not supplied, the third field is set to 0 (zero).

Examples

Command / Query

Response (Description)

*IDN?

VXI Technology, Inc.,VM2164,0,1.0

(The revision listed here is for reference only; the response will always be the current revision of the instrument.)

Related Commands

N/A

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36 VM2164 Command Dictionary

*OPC

Purpose

Sets the OPC bit in the Event Status Register

Type

IEEE 488.2 Common Command

Command Syntax

*OPC

Command Parameters

N/A

*RST Value

N/A

Query Syntax

*OPC?

Query Parameters

N/A

Query Response

Description

The Operation Complete (OPC) command sets the OPC bit in the Event Status Register when all pending operations have completed. The OPC query will return a 1 to the output queue when all pending operations have completed.

Examples

Command / Query

Response (Description)

*OPC

(Sets the OPC bit in the Event Status Register)

*OPC?

1 (Returns the value of the Event Status Register)

Related Commands

*WAI

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VM2164 Command Dictionary 37

*RST

Purpose

Resets the module’s hardware and software to a known state

Type

IEEE 488.2 Common Command

Command Syntax

*RST

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

The Reset (RST) command resets the module’s hardware and software to a known state. See the command index at the beginning of this chapter for the default parameter values used with this command.

Examples

Command / Query

Response (Description)

*RST

(Resets the module)

Related Commands

N/A

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38 VM2164 Command Dictionary

*SRE

Purpose

Sets the service request enable register

Type

IEEE 488.2 Common Command

Command Syntax

*SRE <mask>

Command Parameters

<mask> = Numeric ASCII value from 0 to 255

*RST Value

None – required parameter

Query Syntax

*SRE?

Query Parameters

N/A

Query Response

Numeric ASCII value from 0 to 255

Description

The Service Request Enable (SRE) mask is used to control which bits in the status byte generate back plane interrupts. If a bit is set in the mask that newly enables a bit set in the status byte and interrupts are enabled, the module will generate a REQUEST TRUE event via an interrupt. See the *STB? Command for the layout of bits.

Note:

Bit 6 is always internally cleared to zero as required by IEEE 488.2 section 11.3.2.3.

The layout of the Service Request Enable Register is:

Bit 0 – Unused Bit 1 – Unused Bit 2 – Error Queue Has Data Bit 3 – Questionable Status Summary (Not Used) Bit 4 – Message Available Bit 5 – Event Status Summary Bit 6 – 0 (per IEEE 488.2 section 11.3.2.3) Bit 7 – Operation Status Summary

Examples

Command / Query

Response (Description)

*SRE 4

(Sets the service request enable register)

*SRE?

4 (Returns the value of the SRE register)

Related Commands

N/A

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VM2164 Command Dictionary 39

*STB?

Purpose

Queries the Status Byte Register

Type

IEEE 488.2 Common Command

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

*STB?

Query Parameters

N/A

Query Response

Numeric ASCII value from 0 to 255

Description

The Read Status Byte (STB) query fetches the current contents of the Status Byte Register. See the IEEE 488.2 specification for additional information regarding the Status byte Register and its use. The layout of the Status Register is:

Bit 0 – Unused Bit 1 – Unused Bit 2 – Error Queue Has Data Bit 4 – Questionable Status Summary (not used) Bit 5 – Message Available Bit 6 – Master Summary Status Bit 7 – Operation Status Summary

Examples

Command / Query

Response (Description)

*STB?

16 (Queries the Status Byte Register)

Related Commands

N/A

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40 VM2164 Command Dictionary

*TRG

Purpose

Causes a trigger event to occur

Type

IEEE 488.2 Common Command

Command Syntax

*TRG

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

The Trigger command causes a trigger event to occur.

Examples

Command / Query

Response (Description)

*TRG

(Triggers an event)

Related Commands

N/A

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VM2164 Command Dictionary 41

*TST?

Purpose

Causes a self-test procedure to occur and queries the results

Type

IEEE 488.2 Common Command

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

*TST?

Query Parameters

N/A

Query Response

Numeric ASCII value from 0 to 143

Description

Initiates the counter self-test operation. If the test fails, an error message is placed in the error queue and then the error LED blinks. The self test tests the following:

 Two 4 kb counter measurement buffers  Logic registers  Analog front end per-amp offset, pre-amp inverter and pre-amp gain digital to

analog converters (DACs)

 A 2.5 MHz signal is routed through a test source and checked for accuracy

Examples

Command / Query

Response (Description)

*TST?

0 (Begins the self-test procedure returns the result)

Related Commands

N/A

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42 VM2164 Command Dictionary

*WAI

Purpose

Halts execution of additional commands and queries until the No Operation Pending message is true

Type

IEEE 488.2 Common Command

Command Syntax

*WAI

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

The Wait to Continue command halts the execution of commands and queries until the No Operation Pending message is true. This command makes sure that all previous commands have been executed before proceeding. It provides a way of synchronizing the module with its commander.

Examples

Command / Query

Response (Description)

*WAI

(Pauses the execution of additional commands until the No Operation Pending message is true.)

Related Commands

*OPC

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VM2164 Command Dictionary 43

INSTRUMENT SPECIFIC COMMANDS

ABORt

Purpose

This command aborts any actions in process

Type

Instrument specific command

Command Syntax

ABORt

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

This command aborts any actions in process.

Examples

Command / Query

Response (Description)

ARM:SOUR:CAT?

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEIDATE, CTR_CHAN2

CONF:FREQ

(Configures the counter to read frequency)

ARM:SOUR BUS

(Arms the BUS source)

INIT

(Begins the measurement)

ABOR

(Aborts the measurement)

Related Commands

INITiate

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44 VM2164 Command Dictionary

ARM([:SEQuence1]|[:STARt])[:LAYer]:DELay

Purpose

Specifies a time delay to occur after the receipt of an arm signal before actually arming the counter

Type

Instrument specific command

Command Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:DELay <time_delay>

Command Parameters

<time_delay> = 0 to 65,535 seconds (in 1 μs steps)

*RST Value

0 seconds (pass-through)

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:DELay?

Query Parameters

N/A

Query Response

Returns the set <time_delay> parameter value

Description

Specifies a time delay to occur after receipt of an arm signal prior to actually arming the counter. If the arming source selected is fixed (i.e. HOLD, IMMEDIATE, CTR_CHAN2), this command will have no effect on the counter arming. This command always zeros the event count delay, so specifying a delay of zero places the arm subsystem in pass-though mode. In this mode, the instrument arms immediately upon the receipt of a trigger.

Examples

Command / Query

Response (Description)

CONF:VOLT:DC

(Sets the counter for DC voltage measurement)

ARM:SOUR TTLT0

(Arms the TTLT0 source)

ARM:DEL 1e-3

(Sets time delay for 0.001 seconds)

INIT

(Begins the measurement)

ARM:DEL?

1.000000000000000e-03

Related Commands

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VM2164 Command Dictionary 45

ARM([:SEQuence1]|[:STARt])[:LAYer]:ECOunt

Purpose

Specifies the number of arm signals to count prior to arming the counter

Type

Instrument specific command

Command Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:ECOunt <event_delay>

Command Parameters

<event delay> = 0 to 65,535 triggers

*RST Value

0 (pass though)

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:ECOunt?

Query Parameters

N/A

Query Response

Returns the current <event_delay> parameter value

Description

Specifies the number of arm signals to count prior to arming the counter. Upon receipt of n arming signals (where n is the number specified in the command), the counter will be armed to take measurements. If a fixed arm source (i.e. HOLD, IMMEDIATE, CTR_CHAN2) is being used, this command will have no effect on the counter arming. This command always zeros the delay by time parameter, so specifying an event count of zero places the arm subsystem into the pass-through mode. In this mode, the instrument arms immediately upon the receipt of a trigger.

Example

Command / Query

Response (Description)

CONF:VOLT:DC

(Sets the counter for DC voltage measurement)

ARM:SOUR TTLT0

(Arms the TTLT0 source)

ARM:ECO 100

(Sets the event counter for 100 events)

INIT

(Begins the measurement)

ARM:ECO?

1.000000000000000e+02

Related Commands

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46 VM2164 Command Dictionary

ARM([:SEQuence1]|[:STARt])[:LAYer]:IMMediate

Purpose

To create a one time entry by the counter into the armed state

Type

Instrument specific command

Command Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:IMMediate

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

This function creates a one-time entry by the counter into the armed state without receiving the specified start arm signal.

Example

Command / Query

Response (Description)

Related Commands

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VM2164 Command Dictionary 47

ARM([:SEQuence1]|[:STARt])[:LAYer]:MODE

Purpose

If the counter has been configured for an array measurement, this command specifies whether the counter will perform one or all operations when an ARM command is received

Type

Instrument specific command

Command Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:MODE <mode>

Command Parameters

<mode> = ONCE or ALL

*RST Value

ALL

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:MODE?

Query Parameters

N/A

Query Response

ONCE | ALL

Description

When the counter has been configured for an array measurement, this command specifies whether the counter will perform one or all operations when an ARM command is received. If the mode is ALL, then all operations will be completed upon receipt of one arm signal. If the mode is ONCE, then the instrument will perform one operation and reenter the initiated state. This will continue until the specified number of arm signals have been received. At that point, the specified number of operations have been completed.

Example

Command / Query

Response (Description)

CONF:ARR:FREQ 3

(Configures the counter to take three array measurements)

ARM:MODE ONCE

(Sets up counter to take one measurement and then re-enter the initiated state)

ARM:SOUR HOLD

(Selects ARM:IMM as the starting point)

INIT

(Begins the measurement)

FETC:COUN?

ARM:IMM

FETC:COUN?

ARM:IMM

FETCH:COUN?

FETC?

#368 1.234567891000000e+06, 1.234567890000000e+06,

1.234567892000000e+06

ARM:MODE?

ONCE

Related Commands

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ARM([:SEQuence1]|[:STARt])[:LAYer]:SLOPe

Purpose

Specifies the slope of the counter external arm signal

Type

Instrument specific command

Command Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SLOPe <slope>

Command Parameters

<slope> = POSitive or NEGative

*RST Value

POSitive

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SLOPe?

Query Parameters

N/A

Query Response

POS | NEG

Description

Specifies the slope of the counter external arm signal. When the slope is POSitive, the CTR_EXTARM trigger source will be activated by a rising edge passing through the specified level. When the slope is NEGative, the CTR_EXTARM trigger source will be activated by a falling edge passing through the specified level.

Example

Command / Query

Response (Description)

Related Commands

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce

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VM2164 Command Dictionary 49

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce

Purpose

Selects or queries the start arming source

Type

Instrument specific command

Command Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce <source>

Command Parameters

<source> = BUS, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, COUNTER, CTR_EXTARM, CTR_CHAN2, IMMEDIATE, HOLD

*RST Value

IMMEDIATE

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce?

Query Parameters

N/A

Query Response

Returns the current <source> parameter value

Description

This command selects or queries the start arming source to be used when the counter is initiated.

Example

Command / Query

Response (Description)

Related Commands

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

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50 VM2164 Command Dictionary

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]?

Purpose

Lists all trigger sources available for use with the ARM:SOUR command

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]?

Query Parameters

N/A

Query Response

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEDIATE, CTR_CHAN2

Description

Lists all trigger sources available for use with the ARM:SOUR command. Specifies the start arming source for the counter.

Example

Command / Query

Response (Description)

ARM:SOUR:CAT?

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEDIATE, CTR_CHAN2

CONF:FREQ

(Configures the counter to read frequency)

ARM:SOUR BUS

(Arms the BUS source)

INIT

(Begins the measurement)

FETC:COUN?

*TRIG

FETC:COUN?

FETC?

1.234567890000000e+06

Related Commands

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

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VM2164 Command Dictionary 51

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable?

Purpose

Lists all delayable trigger sources available for use with the ARM:SOUR command

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable?

Query Parameters

N/A

Query Response

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7

Description

Lists all trigger sources available for use with the ARM:SOUR command which are delayable. Specifies the delayable start arming source for the counter.

Example

Command / Query

Response (Description)

ARM:SOUR:CAT:DEL?

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7

Related Commands

ARM([:SEQuence1]|:STARt)[:LAYer]:SOURce? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

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ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

Purpose

Lists all fixed trigger sources available for use with the ARM:SOUR command

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

Query Parameters

N/A

Query Response

HOLD, IMMEDIATE, CTR_CHAN2

Description

Lists all trigger sources available for use with the ARM:SOUR command that are fixed. Specifies the fixed start arming source for the counter.

Example

Command / Query

Response (Description)

ARM:SOUR:CAT:FIX?

HOLD, IMMEDIATE, CTR_CHAN2

Related Commands

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]? ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable?

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VM2164 Command Dictionary 53

ARM(:SEQuence2|:STOP)[:LAYer]:DELay

Purpose

Specifies a time delay to occur after receipt of a stop arm signal prior to actually disarming the counter

Type

Instrument specific command

Command Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:DELay <time_delay>

Command Parameters

<time_delay> = 0 to 65,535 seconds (in 1 μs steps)

*RST Value

0 seconds (pass-through)

Query Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:DELay?

Query Parameters

N/A

Query Response

Returns the set <time_delay> parameter value

Description

This command specifies a time delay to occur after receipt of a stop arm signal prior to actually disarming the counter. If the stop arming source selected is fixed (i.e. HOLD, IMMEDIATE, TIMER, CTR_CHAN2), this command will have no effect on the counter arming. This command always zeros the event count delay, so specifying a delay of zero places the arm subsystem in pass-through mode. In this mode, the instrument disarms immediately upon receipt of an arming signal.

Example

Command / Query

Response (Description)

CONF:VOLT:DC

(Sets the counter for DC voltage measurement)

ARM:STOP:SOUR TTLT0

(Sets source as TLT0)

ARM:STOP:DEL 1e3

(Sets time delay to be 1000 seconds)

INIT

(Begins the measurement)

ARM:STOP:DEL?

1.000000000000000e+03

Related Commands

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ARM(:SEQuence2|:STOP)[:LAYer]:ECOut

Purpose

Specifies the number of stop arm signals the instrument will count prior to disarming the counter

Type

Instrument specific command

Command Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:ECOunt <event_delay>

Command Parameters

<event_delay> = 0 to 65,535 triggers

*RST Value

0 triggers (pass through)

Query Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:ECOunt?

Query Parameters

N/A

Query Response

Returns the current <event_delay> parameter value

Description

This command specifies the number of stop arm signals the instrument will count prior to disarming the counter. Upon receipt of an arming signal, the counter will exit the armed state. If the arm source selected is fixed (i.e. HOLD, IMMEDIATE, TIMER, CTR_CHAN2), this command will have no effect on disarming the counter. This command always zeros the delay by time parameter, so specifying an event count of zero places the arm subsystem in pass-through mode. In this mode, the instrument arms immediately upon receipt of a trigger.

Example

Command / Query

Response (Description)

CONF:VOLT:DC

(Sets the counter for DC voltage measurement)

ARM:STOP:SOUR TTLT0

(Sets the disarm source to TTLT0)

ARM:STOP:ECO 100

(Sets the number of stop arm signals that will lead to disarming the counter)

INIT

(Begins the measurement)

ARM:STOP:ECO?

1.000000000000000e+02

Related Commands

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ARM(:SEQuence2|:STOP)[:LAYer]:IMMediate

Purpose

Causes a one-time exit by the counter from the armed state

Type

Instrument specific command

Command Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:IMMediate

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

This command causes a one-time exit by the counter from the armed state without receiving the specified stop arm signal.

Example

Command / Query

Response (Description)

CONF:FREQ

(Configures the counter to read frequency)

ARM:STOP:SOUR TTLT0

(Sets the disarm source to TTLT0)

INIT

FETC:COUN?

ARM:STOP:IMM

FETC:COUN?

Related Commands

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ARM(:SEQuence2|:STOP)[:LAYer]:SOURce

Purpose

Selects or queries the stop arming source to be used when the counter is initiated

Type

Instrument specific command

Command Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce <source>

Command Parameters

<source> = BUS, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEDIATE, CTR_EXTARM, INTERNAL, LEVEL

*RST Value

IMMEDIATE

Query Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce?

Query Parameters

N/A

Query Response

BUS, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEDIATE, CTR_EXTARM, INTERNAL, LEVEL

Description

This command selects or queries the stop arming source to be used when the counter is initiated.

Example

Command / Query

Response (Description)

Related Commands

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]? ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable? ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

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ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]?

Purpose

Lists all trigger sources available for use with the ARM:STOP:SOUR command

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

Same as Query Response

Query Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]?

Query Parameters

N/A

Query Response

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEDIATE, INTERNAL, LEVEL

Description

Lists all trigger sources available for use with the ARM:STOP:SOUR command. This command specifies the stop arming source for the counter.

Example

Command / Query

Response (Description)

ARM:STOP:SOUR:CAT?

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, HOLD, IMMEDIATE, INTERNAL, LEVEL

CONF:ARR:FREQ 512

ARM:SOUR BUS

(Sets the ARM source to BUS)

ARM:STOP:SOUR:BUS

(Sets the disarm source to BUS)

INIT

FETC:COUN?

*TRG

FET:COUN?

FETC:COUN?

*TRG

FETC:COUN?

Related Commands

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce? ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable? ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

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ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable?

Purpose

Lists all delayable trigger sources available for use with ARM:STOP:SOUR command

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable?

Query Parameters

N/A

Query Response

BUS, CTR_EXTARM, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7

Description

Lists all delayable trigger sources available for use with ARM:STOP:SOUR command. This command specifies the stop arming source for the counter.

Example

Command / Query

Response (Description)

ARM:STOP:SOUR:CAT:DEL?

BUS, COUNTER, CTR_EXTARM, TTLTRG0, TTLTRG0, TTLTRG0, TTLTRG0, TTLTRG0, TTLTRG0, TTLTRG0, TTLTRG7

Related Commands

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce? ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]? ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

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ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

Purpose

Lists all fixed trigger sources available for use with the ARM:STOP:SOUR command

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

Query Parameters

N/A

Query Response

HOLD, IMMEDIATE, INTERNAL, LEVEL

Description

Lists all fixed trigger sources available for use with the ARM:STOP:SOUR command. This command specifies the stop arming source for the counter.

Example

Command / Query

Response (Description)

ARM:STOP:SOUR:CAT:FIX?

HOLD, IMMEDIATE, INTERNAL, LEVEL

Related Commands

ARM([:SEQuence2|:STOP)[:LAYer]:SOURce? ARM([:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]? ARM([:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable?

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CALCulate:AVERage?

Purpose

This query calculates the average of a specified number of measurements in the memory buffer

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

<count> = size of last array measurement <offset> = 1 <step_size> = 1

Query Syntax

CALCulate:AVERage?[<count>[,<offset>[,<step_size>]]]

Query Parameters

<count> = 1 to 1000 <offset> = 1 to 1000 <step_size> = 1 to 1000

Query Response

Averages a specified number of measurements in the memory buffer. The optional parameters are for averaging selected values in the memory buffer.

Description

This query averages a specified number of measurements in the memory buffer. The optional parameters are for averaging selected values in the memory buffer.

<count> specifies the number of data points to calculate. <offset> determines at which point the instrument will begin averaging stored values. <step_size> determines the number of measurements the instrument will skip before taking a value to be averaged.

Note: In order to specify <step_size>, the <count> and <offset> values must be entered first. If a <count> value is not specified, then the instrument will use the most recent <count> as the default.

Example

Command / Query

Response (Description)

CALC:LIM:UPP 5.0

(Sets upper data value limit)

CALC:AVER?

(Averages all the data that has been collected)

CALC:AVER? 20,3,2

(Averages 20 measurement readings. Starts with the 3rd measurement. Averages every other data point after that.)

Related Commands

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CALCulate:LIMit:ENVelope[:DATA]

Purpose

This command searches for all the input data values within an envelope of values defined as being above, below or in-between as set boundary of values

Type

Instrument specific command

Command Syntax

CALCulate:LIMit:ENVelope[:DATA] <threshold1>,<threshold2>

Command Parameters

<threshold1> = -9.989999999999990e+99 to +9.989999999999990e+99 <threshold2> = -9.989999999999990e+99 to +9.989999999999990e+99

*RST Value

-9.989999999999990e+99, +9.989999999999990e+99

Query Syntax

CALCulate:LIMit:ENVelope[:DATA]?

Query Parameters

N/A

Query Response

Returns the <threshold1> and <threshold2> values.

Description

This command searches for all the input data values within an envelope of values defined as being above, below or in-between a set of values. The range of the envelope is determined by the <threshold1> and <threshold2> values. For example:

 If the <threshold2> is greater than the <threshold1>, the range of data values searched

for is above the <threshold1> value or below the <threshold1> value.

 If the <threshold2> is less than <threshold1> the range of data values searched for is

between the <threshold1> and <threshold2>.

Threshold

When

Threshold < Threshold

When

Threshold > Threshold

Data Values

Searched

Data Values

Searched

Data Values

Searched

Example

Command / Query

Response (Description)

CALC:LIM:ENV 1000,5000

(Sets an envelope value. All data points above

5.0 kHz and below 1.0 kHz are targeted)

CALC:LIM:ENV?

1000, 5000 (Returns the envelope threshold value)

CALC:LIM:ENV 5000,1000

(Sets an envelope value. All data points between

5.0 kHz and 1.0 kHz are targeted)

CALC:LIM:ENV?

5000, 1000 (Returns the envelope threshold value)

Related Commands

CALCulate:LIMit:FCOcunt[:DATA]? CALCulate:LIMit:REPort[:DATA]?

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CALCulate:LIMit:FCOunt?

Purpose

This query returns the number of data points that failed a limit test

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:LIMit:FCOunt?

Query Parameters

N/A

Query Response

This query returns the number of data points outside of a defined threshold

Description

This query performs a limit test on the current available data and returns the number of data points that failed a limit test.

Note: A CALCulate:LIMit:UPPer or LOWer or ENVelope command must be sent before this query.

Example

Command / Query

Response (Description)

CALC:LIM:UPP 5000

(Sets the upper threshold value)

CALC:LIM:FCO?

(Returns the number of data points outside of a defined threshold.)

Related Commands

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CALCulate:LIMit:LOWer[:DATA]

Purpose

Searches for all the input data values below a certain <threshold>

Type

Instrument specific command

Command Syntax

CALCulate:LIMit:LOWer[:DATA] <threshold>

Command Parameters

<threshold> = -9.989999999999990e+99 to +9.989999999999990e+99

*RST Value

-9.989999999999990e+99

Query Syntax

CALCulate:LIMit:LOWer[:DATA]?

Query Parameters

N/A

Query Response

Returns the <threshold> value

Description

This command searches for all the input data values below a certain <threshold>.

Example

Command / Query

Response (Description)

CALC:LIM:LOW 5.0

(Sets the lower threshold value)

CALC:LIM:LOW?

5.00000000000000e+00 (Returns the lower threshold value)

Related Commands

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CALCulate:LIMit:REPort[:DATA]?

Purpose

This query returns the <memory_index> and <failed_value> values collected

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:LIMit:REPort[:DATA]?

Query Parameters

N/A

Query Response

Returns the lower threshold value.

Description

This query returns the <memory_index> and <failed_value> values collected in the most recent CALCulate:LIMit….[:DATA] command.

Note

 The CALCulate:LIMit….[:DATA] command must be executed before running the

CALC:REP command. If no data values were found, the instrument will return a value of zero. (The first point of memory is “1”).

 The CALCulate:LIMit:UPPer, LOWer or ENVelope command must be sent

before sending this query.

Example

Command / Query

Response (Description)

CAL:LIM:UPP 5000

(Sets <threshold2> value)

CALC:LIM:REP?

2,6002.0,5,5001.0 (Returns the number of data points and data values outside of the defined threshold.)

Related Commands

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CALCulate:LIMit:UPPer[:DATA]

Purpose

Searches for all the input data values above a certain <threshold>

Type

Instrument specific command

Command Syntax

CALCulate:LIMit:UPPer[:DATA] <threshold>

Command Parameters

<threshold> = -9.989999999999990e+99 to +9.989999999999990e+99

*RST Value

9.989999999999990e+99

Query Syntax

CALCulate:LIMit:UPPer[:DATA]?

Query Parameters

N/A

Query Response

Returns the <threshold> value

Description

This command searches for all the input data values above a certain <threshold>.

Example

Command / Query

Response (Description)

CALC:LIM:UPP 5.0

(Sets the <threshold1> value)

CALC:LIM:UPP?

5.000000000000000e+00 (Returns the <threshold1> value)

Related Commands

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CALCulate:MAXimum?

Purpose

This query calculates and returns the maximum value of a set of data

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:MAXimum?[<count>[,<offset>[,<step_size>]]]

Query Parameters

<count> = 1 to 1000 <offset> = 1 to 1000 <step size> = 1 to 1000

Query Response

Returns the maximum value for a set of data.

Description

This query calculates and returns the maximum value of a set of data. The <data_index> returned indicates the data point in memory where the maximum

value is. The <max_value> returns the value of the maximum data point. If no valid data values

were found then “No Data” will be returned. The optional parameters are for

comparing selected values in the memory buffer. The optional <count> parameter specifies the number of data points to compare. If

<count> is not specified, the number measured last will be used as the default. The optional <offset> parameter determines at which point in memory values will start

to be searched. The optional <step_size> parameter determines the number of measurements to skip

before taking a value to be compared. Note: In order to specify a <step_size>, the user must enter the <count> and the

<offset> information.

Example

Command / Query

Response (Description)

CALC:MAX?

(Returns the maximum value for a set of data)

Related Commands

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CALCulate:MEDian?

Purpose

This query calculates and returns the median value of a set of data

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

Query Syntax

CALCulate:MEDian?[<count>[,<offset>[,<step_size>]]]

Query Parameters

<count> = 1 to 1000 <offset> = 1 to 1000 <step size> = 1 to 1000

Query Response

Returns the median value for a set of data.

Description

This query calculates and returns the median value for a set of data. The <data_index> returned indicates the data point in memory where the median value is. The <median_value> returns the value of the median data point. If no valid data values

were found, then “No Data” will be returned. The optional parameters allow for

searching for selected values in the memory buffer. The optional <count> parameter specifies the number of data points to search. If no <count> is specified, the number measured last is used as the default. The optional <offset> parameter determines the point in memory where the search for values begins. The optional <step_size> parameter determines the number of measurements to skip before taking a value to be compared.

Note: In order to specify <step_size>, the user must enter the <count> and the <offset> information.

Example

Command / Query

Response (Description)

CALC:MED?

(Returns the median value for the data set)

Related Commands

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CALCulate:MINimum?

Purpose

This query calculates and returns the minimum value of a set of data

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:MINimum?[<count>[,<offset>[,<step_size>]]]

Query Parameters

<count> = 1 to 1000 <offset> = 1 to 1000 <step size> = 1 to 1000

Query Response

Returns the minimum data point for the set of data.

Description

This query calculates and returns the minimum value of a set of data. The <data_index> returned indicates the data point in memory where the minimum

value is. The <min_value> returns the value of the minimum data point. If no valid data values

are found, then “No Data” will be returned. The optional parameters are for comparing

selected values in the memory buffer. The optional <count> parameter specifies the number of data points to compare. If

<count> is not specified, the number measured last will be used as the default. The optional <offset> parameter determines at which point in memory values will start

to be searched. The optional <step_size> parameter determines the number of measurements to skip

before taking a value to be compared. Note: In order to specify a <step_size>, the user must enter the <count> and the

<offset> information.

Example

Command / Query

Response (Description)

CALC:MIN?

(Returns the minimum value for a set of data)

Related Commands

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CALCulate:SDEViation?

Purpose

This query calculates and returns the standard deviation for a set of data

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:SDEViation?[<count>[,<offset>[,<step_size>]]]

Query Parameters

<count> = 1 to 1000 <offset> = 1 to 1000 <step size> = 1 to 1000

Query Response

Returns the standard deviation for a set of data.

Description

This query calculates and returns the standard deviation for a set of data. The formula used for standard deviation is:

 

  

1-nn

xxn





where n = the number of data summed x = the value of the data in the set

If no valid data values were found “No Data” will be returned. The optional parameters are for calculating selected values in the memory buffer.

The optional <count> parameter specifies the number of data points to calculate. If no <count> is specified, the number measured last is used as the default.

The optional <offset> parameter determines at which point in memory values will start to be calculated.

The optional <step_size> parameter determines the number of measurements to skip before taking a value to be used.

Note: In order to specify a <step_size>, the <count> and <offset> information must be entered first.

Example

Command / Query

Response (Description)

CALC:SDEV?

(Calculates and returns the standard deviation on a set of data)

Related Commands

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CALCulate:TRANsform:HISTogram:ABOVe?

Purpose

This query returns the number of points above the maximum value in a histogram calculation

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:TRANsform:HISTogram:ABOVe?

Query Parameters

N/A

Query Response

Returns the number of points above the maximum value in a histogram calculation.

Description

Returns the number of points above the maximum value in a histogram calculation.

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:RANGE:AUTO OFF

(Turns off auto ranging)

CALC:TRAN:HIST:RANGE 10,50

(Sets the range of the histogram calculation for 10 - 50)

CALC:TRAN:HIST:ABOV?

(Returns the number of data points above 50)

Related Commands

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CALCulate:TRANsform:HISTogram:BELow?

Purpose

This query returns the number of points below the minimum value in a histogram calculation

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:TRANsform:HISTogram:HISTogram:BELow?

Query Parameters

N/A

Query Response

N/A

Description

Returns the number of points below the minimum value in a histogram calculation.

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:RANG:AUTO OFF

(Turns off auto ranging)

CALC:TRAN:HIST:RANG:AUTO 10,50

(Sets the range of the histogram calculation for 10 - 50)

CALC:TRAN:HIST:BEL?

(Returns the number of data points below 10)

Related Commands

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CALCulate:TRANsform:HISTogram:COUnt

Purpose

Determines the number of data points to include in a histogram calculation

Type

Instrument specific command

Command Syntax

CALCulate:TRANsform:HISTogram:COUnt <numeric_value>

Command Parameters

<numeric_value>

*RST Value

Query Syntax

CALCulate:TRANsform:HISTogram:COUNt?

Query Parameters

N/A

Query Response

Returns the number of points in a histogram calculation.

Description

This command determines the number of data points to include in a histogram calculation.

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:COUN 5

(Sets the number of data to use in a histogram calculation to 5)

CALC:TRAN:HIST:COUN?

5.000000000000000e+00 (Returns the number of data points to use in a histogram calculation)

Related Commands

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CALCulate:TRANsform:HISTogram:POINts

Purpose

Sets the number of intervals in a histogram calculation

Type

Instrument specific command

Command Syntax

CALCulate:TRANsform:HISTogram:POINts <numeric_value>

Command Parameters

<numeric_value> = 1 - 6

*RST Value

Query Syntax

CALCulate:TRANsform:HISTogram:POINts?

Query Parameters

N/A

Query Response

Returns the number of intervals in a histogram calculation.

Description

This command sets the number of intervals in a histogram calculation. If a data value is exactly the same value as a limit dividing two bins, the data value will be counted in the next bin (i.e. 25 is placed in Bin #5), unless the value matches the last interval limit (i.e. 35 is placed in Bin #6). The reference table below delineates the limits for each bin.

BIN #

LIMITS

5-10

10-15

15-20

20-25

25-30

30-35

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:POIN 3

(Sets the number of intervals in a histogram calculation to 3)

CALC:TRAN:HIST:POIN?

3.000000000000000e+00 (Returns the number of intervals in a histogram calculation)

Related Commands

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CALCulate:TRANsform:HISTogram:RANGe

Purpose

Sets the minimum and maximum values to use in a histogram calculation

Type

Instrument specific command

Command Syntax

CALCulate:TRANsform:HISTogram:RANGe <min_value>,<max_value>

Command Parameters

<min_value> = -9.989999999999990e+99 to +9.989999999999990e+99 <max_value> = -9.989999999999990e+99 to +9.989999999999990e+99

*RST Value

Query Syntax

CALCulate:TRANsform:HISTogram:RANGe?

Query Parameters

N/A

Query Response

Returns the <min_value> and <max_value> in a histogram calculation.

Description

This command sets the minimum and maximum values to be used in a histogram calculation.

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:RANG 1,100

(Sets the range of a histogram calculation)

CALC:TRAN:HIST:RANG?

1,100 (Returns the range of a histogram calculation)

Related Commands

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CALCulate:TRANsform:HISTogram:RANGe:AUTO

Purpose

This command sets the minimum and maximum values to use in a histogram calculation

Type

Instrument specific command

Command Syntax

CALCulate:TRANsfrom:HISTogram:RANGe:AUTO <ON|OFF>

Command Parameters

<ON|OFF>

*RST Value

N/A

Query Syntax

CALCulate:TRANsform:HISTogram:RANGe:AUTO?

Query Parameters

N/A

Query Response

<ON|OFF>

Description

This command automatically determines the minimum and maximum values to be used in a histogram calculation. The minimum and maximum data points will be used.

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:RANG:AUTO ON

(Sets the range of a histogram calculation)

CALC:TRAN:HIST:RANG:AUTO?

Related Commands

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CALCulate:TRANsform:HISTogram?

Purpose

This query calculates and returns the histogram for a set of data

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:TRANsform:HISTogram?

Query Parameters

N/A

Query Response

<bin_data{bin_data>}

Description

This query calculates and returns the histogram for a set of data. The format is as follows:

<bin_data{bin_data>}

Example

Command / Query

Response (Description)

CALC:TRAN:HIST:COUN 5

(Sets the number of data to use in a histogram calculation to 5)

CALC:TRAN:HIST:POIN 3

(Sets the number of intervals in a histogram calculation to 3)

CALC:TRAN:HIST:RANG 10,00

(Sets the range of a histogram calculation)

CALC:TRAN:HIST?

(Returns the histogram distribution)

Related Commands

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CALCulate:VARiance?

Purpose

This query calculates and returns the variance for a set of data

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CALCulate:VARiance? [<count>[,<offset>[,<step_size>]]]

Query Parameters

<count> = 1 to 1000 <offset> = 1 to 1000 <step size> = 1 to 1000

Query Response

Returns the variance for a set of data as defined by the equation below.

Description

This query calculates and returns the variance for a set of data. The formula for variance used is:

 

  

1nn

ΣxΣxn





where n = the number of data summed x = the value of the data in the set

If no valid data values were found “No Data” will be returned. The optional parameters are for calculating selected values in the memory buffer.

The optional <count> parameter specifies the number of data points to calculate. If no <count> is specified then the number measurements last taken will be the default.

The optional <offset> parameter determines at which point in memory values will start to be calculated.

The optional <step_size> parameter determines the number of measurements to skip before taking a value to be used.

Note: In order to specify a <step_size> the <count> and <offset> information must be entered first.

Example

Command / Query

Response (Description)

CALC:VAR?

(Calculates and returns the variance on a set of data)

Related Commands

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CALibration:COSCillator

Purpose

Calibrates the reference oscillator. (Must have Option 15 or Option 16 installed)

Type

Instrument specific command

Command Syntax

CALibration:COSCillator

Command Parameters

<daclevel> = 0 – 4095 Values outside of this range are changed to the closest parameter limit (i.e. 6000 is set to 4095)

*RST Value

N/A

Query Syntax

CALibration:COSCillator?

Query Parameters

N/A

Query Response

Returns the set <dac_level> parameter value

Description

This command calibrates the TCXO (Option 15) or the OCXO oscillator (Option 16) by adjusting the DAC level when a known user clock is used to calibrate the oscillator.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:COSC 2048

(Calibrates the oscillator)

CAL:COSC?

2048 (Returns the calibration value)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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CALibration:DAC:OFFSet

Purpose

This command calibrates one of two factors used by the DAC

Type

Instrument specific command

Command Syntax

CALibration:DAC <dacnum>:OFFSet <dacoffset>

Command Parameters

<dacnum> = 1 | 2 <dacoffset> = Numbers greater than 1948 and less than 2148

*RST Value

N/A

Query Syntax

CALibration:DAC:OFFSet?

Query Parameters

N/A

Query Response

Returns the set <dacoffset> parameter value

Description

This command calibrates one of two factors used by the DAC.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:DAC 1:OFFSET 2048

(Sets the DAC slope offset for Channel 1)

CAL:DAC 1:OFFSET?

2048 (Returns the DAC offset value)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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CALibration:DAC:SLOPE

Purpose

Calibrates one of two factors used by the DAC

Type

Instrument specific command

Command Syntax

CALibration:DAC <dacnum>:SLOPe <dacslope>

Command Parameters

<dacnum> = 1 | 2 <dacslope> = At 1x, numbers greater than -500 and less than -300 At 10x, numbers greater than -50 and less than -30

*RST Value

N/A

Query Syntax

CALibration:DAC:SLOPe?

Query Parameters

N/A

Query Response

Returns the set <dacslope> parameter value

Description

This command calibrates one of two factors used by the DAC.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:DAC 1:SLOP –409.6

(Sets the DAC slope value for Channel 1)

CAL:DAC 1:SLOP?

-409.6 (Returns the DAC slope value)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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VM2164 Command Dictionary 81

CALibration:DEFault

Purpose

Initializes calibration values to known values

Type

Instrument specific command

Command Syntax

CALibration:DEFault

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

Initializes calibration values to known values. The following values are set:

Security Code = VM2164 Serial Number = 0 Product = 2164 TEC Slope = 5.92e-11 TEC Offset = -3.9e-9 Time Interval = 1.44e-9 DAC Scale = 409.6 @ 1x = 40.96 @ 10x DAC Offset = 2048.0 Oscillator Trim Value = 2048

Executing this command changes all previously set calibration values.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:DEF

(Initializes calibration values to known values)

Related Commands

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CALibration:SECure:CODE

Purpose

Sets the code required to disable calibration security

Type

Instrument specific command

Command Syntax

CALibration:SECure:CODE <string>

Command Parameters

<string> = the code string can be from 1 to 12 ASCII characters in length entered in

IEEE 488.2 definite or indefinite length arbitrary block format

*RST Value

N/A

Query Syntax

CALibration:SECure:CODE? <string>

Query Parameters

N/A

Query Response

Returns the security code

Description

The Calibration Security Code command sets the code required to disable calibration security. Calibration security must first be disabled before the code can be changed. Before shipping the instrument, the factory code setting is VM2164.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:SEC:CODE #16VM2164

(Sets the factory code setting of VM2164)

Related Commands

CALibration:SECure:STATe CALibration:STORe

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VM2164 Command Dictionary 83

CALibration:SECure[:STATe]

Purpose

Enable or disable calibration security

Type

Instrument specific command

Command Syntax

CALibration:SECure:STATe <boolean>,<string>

Command Parameters

<boolean> = 0 | 1 | OFF | ON <string> = the code string can be from 1 to 12 ASCII characters in length entered in

IEEE 488.2 definite or indefinite length arbitrary block format

*RST Value

<boolean> = ON

Query Syntax

CALibration:SECure:STATe?

Query Parameters

N/A

Query Response

Returns the set <boolean> value

Description

The Calibration Security State enables or disables the calibration security. While security is on, no stores to the non-volatile memory are allowed. In order to disable the security state, the security code must be supplied. To enable the security, the code does not need to be supplied. The security state is enabled by default.

Security can also be enabled without entering the <string> parameter by sending the CALibration:SECure:STATe 1 | ON command. Security cannot, however, be disabled using a CALibration:SECure:STATe 0 | OFF command. If this command is sent, a “Missing Parameter” error will be returned.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:SEC:STAT OFF,#16VM2164

(Disables calibration security)

CAL:SEC:STAT 1

(Turns the calibration security back on)

CAL:SEC:STAT?

1 (Indicates that calibration security is enabled)

Related Commands

CALibration:SECure:CODE CALibration:STORe

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84 VM2164 Command Dictionary

CALibration:STORe

Purpose

Stores calibration data into non-volatile memory

Type

Instrument specific command

Command Syntax

CALibration:STORe

Command Parameters

N/A

*RST Value

N/A

Query Syntax

N/A

Query Parameters

N/A

Query Response

N/A

Description

The Calibration:STORe command stores correction data into non-volatile memory. The correction data is calibration data that has been downloaded via the program messages in the Calibration Data subsystem. The CALibration:STORe command should only be performed after all the correction data has been finalized.

Note: Security must be turned off in order to use this command.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:SEC OFF,#16VM2164

(Disables security)

CAL:STOR

(Stores correction data into non-volatile memory)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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VM2164 Command Dictionary 85

CALibration:TEC:OFFSet

Purpose

Calibrates one of three factors used by the TEC circuitry

Type

Instrument specific command

Command Syntax

CALibration:TEC:OFFSet <tec_offset>

Command Parameters

<tech_offset> = All real numbers

*RST Value

N/A

Query Syntax

CALibration:TEC:OFFSet?

Query Parameters

N/A

Query Response

Returns the set value of the <tec_offset> parameter.

Description

Calibrates one of three factors used by the TEC circuitry. These factors are the start slope, the stop slope and the offset.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:TEC:OFFSET –3.9e-9

(Sets the TEC offset)

CAL:TEC:OFFSET?

-3.9e-9 (Returns the TEC offset)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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CALibration:TEC:STARtslope

Purpose

Calibrates one of three factors used by the TEC circuitry

Type

Instrument specific command

Command Syntax

CALibration:TEC:STARtslope <startslope>

Command Parameters

<startslope> = all real number

*RST Value

N/A

Query Syntax

CALibration:TEC:STARtslope?

Query Parameters

N/A

Query Response

Returns the set <slope> parameter value

Description

Calibrates one of three factors used by the TEC circuitry. These factors are the start slope, the stop slope and the offset.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:TEC:STAR 5.92e-11

(Sets the start slope adjustment)

CAL:TEC:STAR?

5.92e-11 (Returns the start slope adjustment value)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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VM2164 Command Dictionary 87

CALibration:TEC:STOPslope

Purpose

Calibrates one of three factors used by the TEC circuitry

Type

Instrument specific command

Command Syntax

CALibration:TEC:STOPslope <stopslope>

Command Parameters

<stopslope> = all real numbers

*RST Value

N/A

Query Syntax

CALibration:TEC:STOPslope?

Query Parameters

N/A

Query Response

Returns the set <stopslope> parameter value

Description

Calibrates one of three factors used by the TEC circuitry. These factors are the start slope, the stop slope and the offset.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:TEC:STOP 5.92e-11

(Sets the start slope adjustment)

CAL:TEC:STOP?

5.92e-11 (Returns the start slope adjustment value)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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CALibration:TINTerval:OFFSet

Purpose

This command compensates for the differences between Channel 1 and Channel 2

Type

Instrument specific command

Command Syntax

CALibration:TINTerval:OFFSet <offset_val>

Command Parameters

<offset_val> = all real numbers

*RST Value

N/A

Query Syntax

CALibration:TINTerval:OFFSet?

Query Parameters

N/A

Query Response

Returns the set <offset_val> parameter

Description

This command compensates for the differences between Channel 1 and Channel 2 created by differences in circuitry and their components.

Calibration commands should only be executed by qualified personnel. Changing these values incorrectly can cause the instrument to perform improperly

Examples

Command / Query

Response (Description)

CAL:TINT:OFFS 1.44e-9

(Sets the time interval offset)

CAL:TINT:OFFS?

1.44e-9 (Returns the set time interval offset value)

Related Commands

CALibration:SECure:CODE CALibration:SECure:STATe

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VM2164 Command Dictionary 89

CONFigure[1|2](:SCALar]|:ARRay):NDUTy cycle|PDUTCycle|DCYCle

Purpose

This command configures a positive or negative duty cycle measurement

Type

Instrument specific command

Command Syntax

CONFigure[1|2](SCALar]|:ARRay):NDUTycycle|DCYCLE[,<dcycle reference>[,<expected>[<array size>[,<expected value>[,<resolution>]]]]]

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid If ARRay is specified, <array size> is a required parameter

<dcycle reference> = 10 to 50

*RST Value

<array size> = 1 <dcycle reference> = 50

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures a positive or negative duty cycle measurement. The reference is the percent of the signals peak value (i.e. the percent of the peak-to-peak value as measured from the signals minimum.)

This command will modify the following:

 function – set to PDUT or NDUT  aperture – described below  aperture/events mode – set to APERture

The input channel attenuation, offset, gain, level and slope can be modified. If neither of the optional arguments are used:

 aperture is set to the default value

If only the <expected value> argument is used:

 aperture is set to the default value

If both <expected value> and <resolution> are used the aperture is calculated as follows:

 

resolutionlogexpectedlog9

10apperature





with a minimum of 1e-8 and a maximum of 5 seconds. A longer aperture may be set with the SENSe: APERture command.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands

SENSe commands

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CONFigure[1|2](:SCALar]|:ARRay):NWIDth|PWIDth

Purpose

This command configures the counter to measure the positive or negative pulse width time of the signal on the CONFigure suffix input channel

Type

Instrument specific command

Command Syntax

CONFigure[1|2](SCALar]|:ARRay):NWIDth|PWIDth[<array size>[,<pwidth reference>[,<expected value>[,<resolution>]]]]

Command Parameters

<array size> = 1 to 1000 <pdwidth reference> = 10 to 90

*RST Value

<array size> = 1

If SCALar is specified, this parameter is no longer valid If ARRay is specified, <array size> is a required parameter

<pdwidth reference> = 50

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures the counter to measure the positive or negative pulse width time of the signal on the CONFigure suffix input channel. The units of the <reference> are percentage. The units of <expected value> and <resolution> are seconds. If the <expected value> argument is used, the expected period of the input signal should be used, not the expected pulse width. This measurement uses both comparators of the input channel. The reference value is used to set the comparator threshold level to a percentage of the peak-to-peak signal.

If a reference value is specified and INPut:SETup:AUTO is set to OFF, then INPut:SETup:AUTO is set to ONCE. If a reference value is not specified, the input channel comparators 1 and 2 levels will be set to 0 V.

This command will modify the following:

 function – set to PWID or NWID  aperture – described below  aperture/events mode – set to APERture

The input channel attenuation, offset, gain, level and slope can be modified. If neither of the optional arguments are used:

 aperture is set to the default value

If only the <expected value> argument is used:

 aperture is set to the default value

If both <expected value> and <resolution> are used the aperture is calculated as follows:

 

resolutionlogexpectedlog9

10apperature





with a minimum of 1e-8 and a maximum of 5 seconds. A longer aperture may be set with the SENSe: APERture command.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands

SENSe commands

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VM2164 Command Dictionary 91

CONFigure[1|2](:SCALar]|:ARRay):PHASe

Purpose

This command configures a phase measurement

Type

Instrument specific command

Command Syntax

CONFigure[1|2](SCALar]|:ARRay):PHASe[<array size>[,<expected value> [,<resolution>]]]

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid If ARRay is specified, <array size> is a required parameter

*RST Value

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures a phase measurement. The suffix selects the channel for the beginning of the measurement. For example, CONF1:PHASe will set up the instrument to perform a phase measurement from Channel 1 to Channel 2, whereas CONF2:PHASe will set up the instrument to perform a phase measurement from Channel 2 to Channel 1.

This command will modify the following:

 Function set to PHASe  Aperture/events mode set to aperture

If auto setup is ON or ONCE the input attenuation, offset, gain, level and slope can be modified.

Note: Phase measurements use all available hardware timers. When the counter is in this mode the aperture is controlled by software and has a minimum period of approximately 10 ms.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands

SENSe commands

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CONFigure[1|2](:SCALar]|:ARRay):RTIMe|FTIMe|RISE:TIME|FALL:TIME

Purpose

This command configures the counter to measure the rise or fall time of the signal on the CONFigure suffix input channel

Type

Instrument specific command

Command Syntax

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid

If ARRay is specified, <array size> is a required parameter <low reference> = 10 to 90 <high reference> = 10 to 90

*RST Value

<array size> = 1 <low reference> = 10 <high reference> = 90

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures the counter to measure the rise or fall time of the signal on the CONFigure suffix input channel. The unit of the <low reference> and <high reference> are a percentage. The units of <expected value> and <resolution> are seconds. If the <expected value> argument is used the expected period of the input signal should be used not the expected rise/fall time. This measurement uses both comparators of the input channel.

If a reference value is specified and INPut:SETup:AUTO is set to OFF, INPut:SETup:AUTO will be set to ONCE. If a reference value is not specified, the input channel comparator 1 level will be set to -0.25 V and input channel comparator 2 level will be set to +0.25 V for a rise time measurement. For fall time the reverse is set.

This command will modify the following:

 function – set to RTIMe or FTIMe

 aperture – described below

 aperture/events mode – set to APERture

The input channel attenuation, offset, gain, level and slope can be modified. If neither of the optional arguments are used:

 aperture is set to the default value If only the <expected value> argument is used:

 aperture is set to the default value If both <expected value> and <resolution> are used the aperture is calculated as

follows:

 

resolutionlogexpectedlog9

10apperature





with a minimum of 1e-8 and a maximum of 5 seconds. A longer aperture may be set with the SENSe: APERture command.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands

SENSe commands

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VM2164 Command Dictionary 93

CONFigure[1|2](:SCALar]|:ARRay):TINTerval

Purpose

This command sets the counter to make a time interval measurement

Type

Instrument specific command

Command Syntax

CONFigure[1|2](SCALar]|:ARRay):TINTerval[<array size>[,<expected value>[,<resolution>]]]

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid

If ARRay is specified, <array size> is a required parameter

*RST Value

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command sets the counter to make a time interval measurement. This measurement is made between input Channels 1 and 2. The CONFigure suffix selects the input channel for the beginning of the interval. The end of the interval will be from the remaining channel. The measurement is made from the first detected rising edge on the first channel to the first following rising edge on the second channel. If the <expected value> argument is used the expected period of the input signal should be used not the expected timer interval.

This command will modify the following:

 function – set to TINTerval

 aperture – described below

 aperture/events mode – set to APERture

If autosetup mode is ON or ONCE, the input channel attenuation, offset, gain, level and slope can be modified.

If neither of the optional arguments are used:

 aperture is set to the default value If only the <expected value> argument is used:

 aperture is set to the default value If both <expected value> and <resolution> are used the aperture is calculated as

follows:

 

resolutionlogexpectedlog9

10apperature





with a minimum of 1e-8 and a maximum of 5 seconds. A longer aperture may be set with the SENSe:TINTerval:APERture command.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands

SENSe commands

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CONFigure[1|2](:SCALar]|:ARRay)[:VOLTage][<volt_func>]

Purpose

These commands configure the counter to measure the voltage on the CONFigure suffix input channel

Type

Instrument specific command

Command Syntax

CONFigure[1|2](SCALar]|:ARRay)[:VOLTage]:[<volt_func>][<array size>[,<expected value>[,<resolution>]]]] <volt_func> = :AC?, :DC?, :MINimum?, :MAXimum?, :PTPeak?

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid

If ARRay is specified, <array size> is a required parameter

*RST Value

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

These commands configure the counter to measure the voltage on the CONFigure suffix input channel. The <expected value> and <resolution> parameters are accepted but ignored.

The maximum and minimum voltage of the input signal is determined assuming either a DC signal or a repetitive signal with a frequency of at least 1000 Hz. The user must select the proper INPut:COUPling and INPut:IMPedance separately. The voltage measurements are calculated as follows:

 AC = (maximum – minimum) /2.828  DC = (maximum – minimum) /2  MAXimum = maximum  MINimum = minimum  PTPeak = maximum – minimum

These commands will modify the following:

 input setup – no effect  function – set to AC, DC, MIN, MAX or PTP  autosetup mode – no effect  aperture/events mode – no effect

The actions of these commands are modified by the following:

 <expected value> - no effect  <resolution> - no effect  autosetup mode – no effect  aperture/events mode – no effect

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands

SENSe commands

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CONFigure[1|2|3](:SCALar]|:ARRay):FREQuency

Purpose

This command configures the counter to measure the frequency of the signal on the CONFigure suffix input channel

Type

Instrument specific command

Command Syntax

CONFigure[1|2|3](SCALar]|:ARRay):FREQuency[<array size>[,<expected value>[,<resolution>]]]

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid

If ARRay is specified, <array size> is a required parameter

*RST Value

Query Syntax

CONFigure?

Query Parameters

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures the counter to measure the frequency of the signal on the CONFigure suffix input channel. The units of <expected value> and <resolution> are both Hz.

This command will modify the following:

 function – set to FREQuency

 aperture – described below

 aperture/events mode – set to APERture

If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified

If neither of the optional arguments are used:

 aperture is set to the default value If only the <expected value> argument is used:

 aperture is set to the default value If both <expected value> and <resolution> are used, the aperture is calculated as

follows:

 

resolutionlogexpectedlog9

10apperature





with a minimum of 1e-8 and a maximum for 5 seconds. A longer aperture may be set with the SENSe:FREQuency:APERture command.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands SENSe commands

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CONFigure[1|2|3](:SCALar]|:ARRay):FREQuency:RATio

Purpose

This command configures the counter to measure the ratio of the frequencies of the signals on the CONFigure suffix input channel and <second channel>

Type

Instrument specific command

Command Syntax

CONFigure[1|2|3](SCALar]|:ARRay):FREQuency:RATio[<array size>],<second_channel>[,<expected value>[,<resolution>]]

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid

If ARRay is specified, <array size> is a required parameter

*RST Value

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures the counter to measure the ratio of the frequencies of the signals on the CONFigure suffix input channel and <second channel>.

The <expected value> and <resolution> arguments have no units. The parameters <expected value> and <resolution> are accepted but are not used.

This command will modify the following:

 function – set to FREQuecy:RATio  aperture – set to default  aperture/events mode – set to APERture

If autosetup mode is ON or ONCE the input channel attenuation offset gain level slope can be modified. The SENSe suffix selects the input channel for the numerator, the <second channel> selects the input channel for the denominator ratios of a channel to itself are always one and the counter will generate an error if programmed to do so. <second channel> can be 1, 2 or 3. When Channel 3 is not being used and the counter Mode is EVENts, the <second channel> will be used as the input to the EVENts and the other specified input channel will be used as the input to the EVENts counter.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands SENSe commands

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CONFigure[1|2|3](:SCALar]|:ARRay):PERiod

Purpose

This command configures the counter to measure the period of the signal on the CONFigure suffix input channel

Type

Instrument specific command

Command Syntax

CONFigure[1|2|3](SCALar]|:ARRay):PERiod[<array size>[,<expected value>[,<resolution>]]]

Command Parameters

<array size> = 1 to 1000

If SCALar is specified, this parameter is no longer valid

If ARRay is specified, <array size> is a required parameter

*RST Value

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures the counter to measure the period of the signal on the CONFigure suffix input channel. The units of <expected value> and <resolution> are seconds.

This command will modify the following:

 function – set to PERiod

 aperture – described below

 aperture/events mode – set to APERture

If autosetup mode is ON or ONCE the input channel attenuation, offset, gain, level and slope can be modified.

If neither of the optional arguments are used:

 aperture is set to the default value If only the <expected value> argument is used:

 aperture is set to the default value If both <expected value> and <resolution> are used the aperture is calculated as

follows:

 

resolutionlogexpectedlog9

10apperature





with a minimum of 1e-8 and a maximum of 5 seconds. A longer aperture may be set with the SENSe:FREQuency:APERture command.

Example

See CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize for example.

Related Commands

MEASure commands SENSe commands

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CONFigure[1|2|10|20](:SCALar]|:ARRay):TOTalize

Purpose

This command configures a totalized measurement

Type

Instrument specific command

Command Syntax

CONFigure[1|2|10|20|](SCALar]|:ARRay):TOTalize

Command Parameters

N/A

*RST Value

N/A

Query Syntax

CONFigure?

Query Parameters

N/A

Query Response

Returns the current measurement configuration. This includes any channels, SCALar or ARRay settings and measurements selected.

Description

This command configures a totalized measurement. The counter totalizes two selected channels simultaneously. Channels 1 and 2 are selected by either 1or 2. Channel 1 and the 1 GHz VCO are selected by 10. Channel 2 and the 1 GHz VCO are selected by 20. If either Channel 1 or 2 and the VCO measurement is selected, an elapsed time in nanoseconds is provided after the totalized results for the channel.

Example

Command / Query

Response (Description)

CONF2:ARR:NDUT 1000,25

(Configures the instrument to take 1000 negative duty cycle measurements with a

trigger point of 25% of the signal’s peak on

Channel 2)

CONF1:ARR:DCYC 100,50

(Configures the instrument to take 100 positive duty cycle measurements with at

trigger point of 50% of the signal’s peak on

Channel 1.)

CONF1:PHAS

(Configures the instrument to take a phase measurement from Channel 1 to Channel 2)

CONF1:TINT:DEL:EVEN 100

(Configures a time interval with delay measurement form Channel 1 to the 100th edge on Channel 2)

CONF10:TOT

(Sets up the instrument to totalize Channel 1 and the 1 GHz VCO)

CONF?

10:SCAL:TOT (Returns the set configuration values)

Related Commands

MEASure commands

SENSe commands

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VM2164 Command Dictionary 99

FETCh[<function>]?

Purpose

This query returns the values of measurements

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

<count> = the greatest measurement requested for the array <start> = 1 <step> = 1

Query Syntax

FETCh[<function>]?

<function> = :DCYCle?, :FALL:TIME?, FREQuency?, FREQuency:RATio?, FTIMe?, NDUTycycle?, PDUTycycle?, NWIDth?, PWIDth?, PHASe?, PERiod?, :RISE:TIME?, RTIMe?, TINTerval?, TINTerval:DELay?, :AC?, :DC?, :MINimum?, :MAXimum?, :PTPeak?

Query Parameters

<count> = 1 to 1000 <start> = 1 to 1000 <step> = 1 to 1000

Query Response

See Description

Description

If a single measurement is made, the format of the returned value is:

 n.nnnnnnnnnnnnnnnesxx<1f> If an array measurement is made the format of the returned values is:

 #abbrn.nnnnnnnnnnnnnnnesxx.rn.nnnnnnnnnnnnnnesxx, …,

rn.nnnnnnnnnnnnnnnesxx<1f>

where

 a = number of b digits

 b = number of characters in the returned data not including #abb

 r = space or-

 n = value

 s = + or –

 xx = exponent

The default value of the <count> parameter is the number of measurements requested for the array. The default value of <start> is 1. The default value of <step> is 1. The number of values returned is <count>. The first of the values returned is value <start>. Then every <step> values after start are returned.

If a CONFigure command is made measure frequency, period can also be fetched after the command is initiated.

Example

Command / Query

Response (Description)

ARM:SOUR:CAT?

BUS, COUNTER, HOLD, IMMEDIATE, TTLTRG0, TTLTRG1, TTLTRG2, TTLTRG3, TTLTRG4, TTLTRG5, TTLTRG6, TTLTRG7, TIMER, CTR_EXTARM, CTR_CHAN2

CONF:FREQ

(Configures the counter to read frequency)

TRIG:IMM

(Arms counter to take an immediate measurement)

FETC?

1.234567890000000e+06

Related Commands

CONFigure commands

SENSe commands

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100 VM2164 Command Dictionary

FETCh:COUNt?

Purpose

This query returns the number of measurements completed

Type

Instrument specific query

Command Syntax

N/A

Command Parameters

N/A

*RST Value

N/A

Query Syntax

FETCh:COUNt?

Query Parameters

N/A

Query Response

The number of measurements requested for the array.

Description

This command returns the number of measurements completed. This command may be used to monitor the progress of a measurement or an array of measurements.

CAUTION: Do not continuously issue FETCh:COUNt? or STAT:OPER:COND? queries to check if the measurement is complete. Provide a minimum 100 ms delay between each query to permit the multitasking system to process the measurement efficiently or use *SRQ to avoid processing delays caused by polling.

Example

Command / Query

Response (Description)

CONF:FREQ

(Configures the counter to measure frequency)

ARM:STOP:SOUR TTLT0

INIT

(Initiates the measurement)

FETC:COUN?

0 (Returns the number of measurements)

ARM:IMM

(Arms counter to take an immediate measurement)

FETC:COUN?

Related Commands

CONFigure commands

SENSe commands

Vxi VM2164 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

CERTIFICATION

WARRANTY

LIMITATION OF WARRANTY

RESTRICTED RIGHTS LEGEND

DE C L A R A T I O N O F C O N F O R M I T Y

GENERAL SAFETY INSTRUCTIONS

SUPPORT RESOURCES

SECTION 1

INTRODUCTION

OVERVIEW

PROGRAMMING

CALIBRATION

BUILT-IN SOFTWARE FUNCTIONS

FEATURES

GENERAL SPECIFICATIONS

OSCILLATOR SPECIFICATIONS

SECTION 2

PREPARATION FOR USE

INTRODUCTION

CALCULATING SYSTEM POWER AND COOLING REQUIREMENTS

SETTING THE CHASSIS BACKPLANE JUMPERS

SETTING THE LOGICAL ADDRESS

SECTION 3

COMMAND DICTIONARY

INTRODUCTION

THE SCPI PROGRAMMING LANGUAGE

NOTATION

ALPHABETICAL COMMAND LISTING

COMMAND DICTIONARY

IEEE 488.2 COMMON COMMANDS

*CLS

*ESE

*ESR?

*IDN?

*OPC

*RST

*SRE

*STB?

*TRG

*TST?

*WAI

INSTRUMENT SPECIFIC COMMANDS

ABORt

ARM([:SEQuence1]|[:STARt])[:LAYer]:DELay

ARM([:SEQuence1]|[:STARt])[:LAYer]:ECOunt

ARM([:SEQuence1]|[:STARt])[:LAYer]:IMMediate

ARM([:SEQuence1]|[:STARt])[:LAYer]:MODE

ARM([:SEQuence1]|[:STARt])[:LAYer]:SLOPe

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog[:ALL]?

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:DELayable?

ARM([:SEQuence1]|[:STARt])[:LAYer]:SOURce:CATalog:FIXed?

ARM(:SEQuence2|:STOP)[:LAYer]:DELay

ARM(:SEQuence2|:STOP)[:LAYer]:ECOut

ARM(:SEQuence2|:STOP)[:LAYer]:IMMediate

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog[:ALL]?

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:DELayable?

ARM(:SEQuence2|:STOP)[:LAYer]:SOURce:CATalog:FIXed?

CALCulate:AVERage?

CALCulate:LIMit:ENVelope[:DATA]

CALCulate:LIMit:FCOunt?

CALCulate:LIMit:LOWer[:DATA]

CALCulate:LIMit:REPort[:DATA]?

CALCulate:LIMit:UPPer[:DATA]

CALCulate:MAXimum?

CALCulate:MEDian?

CALCulate:MINimum?

CALCulate:SDEViation?

CALCulate:TRANsform:HISTogram:ABOVe?

CALCulate:TRANsform:HISTogram:BELow?

CALCulate:TRANsform:HISTogram:COUnt

CALCulate:TRANsform:HISTogram:POINts

CALCulate:TRANsform:HISTogram:RANGe

CALCulate:TRANsform:HISTogram:RANGe:AUTO