FTB-2 и FTB-2 Pro. Руководство пользователя

IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*IDN?

Description

The intent of the *IDN? query is for the unique

identification of devices over the system

interface.

Syntax

*IDN?

Parameter(s)

None

Response Syntax

Response(s)

Identification:

The response data syntax for <Identification> is

defined as an <ARBITRARY ASCII RESPONSE

DATA> element.

The response syntax for the *IDN? query,

<Identification> is defined as an <ARBITRARY

ASCII RESPONSE DATA> element. This implies

that the *IDN? query should be the last <QUERY

MESSAGE UNIT> in a <TERMINATED PROGRAM

MESSAGE>.

The response is organized into four fields

separated by commas. The field definitions are

as follows:

Field 1 (Manufacturer): EXFO Inc.

Field 2 (Model): Instrument Model

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*IDN?

Field 3 (Serial number): ASCII character (0 if not

available)

Field 4 (Firmware level): ASCII character (0 if

not available)

ASCII character 0 represents a single

ASCII-encoded byte with a value of 30 (48

decimal).

The presence of data in all fields is mandatory. If

either field 3 or 4 is not available, the ASCII

character 0 shall be returned for that field. A field

may contain any 7-bit ASCII-encoded bytes in the

range of 20 through 7E (32 through 126 decimal)

except commas (2C, 44 decimal) and

semicolons (3B, 59 decimal).

Example(s)

*IDN? returns EXFO Inc.,

FTB-2 Pro,125-2A55,1.0.1.97

Notes

The overall length of the *IDN? response is less

than or equal to 72 characters.

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*OPC

Description

The *OPC command makes synchronization

between the instrument and an external

controller possible. The *OPC command causes

the instrument to set bit 0 (Operation Complete)

in the Standard Event Status Register to the TRUE

(logic 1) state when the instrument completes all

pending operations. Detection of the Operation

Complete message can be accomplished by

continuous polling of the Standard Event Status

command. However, using a service request

eliminates the need to poll the Standard Event

Status Register thereby freeing the controller to

do other useful work.

Syntax

*OPC

Parameter(s)

None

See Also

*OPC?

*WAI

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*OPC?

Description

The *OPC? query makes possible the

synchronization between the instrument and an

external controller by reading the Output Queue

or by waiting for a service request on the

Message Available (MAV) bit in the Status Byte

to place an ASCII character, 1, into its Output

Queue when the device completes all pending

operations. A consequence of this action is that

the MAV bit in the Status Byte Register is set to

state 1.

Syntax

*OPC?

Parameter(s)

None

Response Syntax

Response(s)

Acknowledge:

The response data syntax for <Acknowledge> is

defined as a <NR1 NUMERIC RESPONSE DATA>

element.

The <Acknowledge> response is a single

ASCII-encoded byte corresponding to 1.

The receipt of an <Acknowledge> response

indicates that all pending selected device

operations have been completed.

Example(s)

*OPC? returns 1

See Also

*OPC

*WAI

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*RST

Description

The *RST command performs a device reset.

This command is the third reset level in a

three-level reset strategy. The Reset command

shall do the following:

a) Sets the device-specific functions to a known

state that is independent of the past-use history

of the device.

b) Forces the device into OCIS state (Operation

complete Command Idle State).

c) Forces the device into OQIS state (Operation

complete Query Idle State).

The Reset command explicitly DOES NOT affect

the following:

a) The state of the Communication interface.

b) The Output Queue.

c) Any Event Enable Register setting, including

the Standard Event Status Enable Register setting.

d) Any Event Register setting, including the

Standard Event Status Register settings.

e) Calibration data that affects device

specifications.

f) The Service Request Enable Register setting.

Syntax

*RST

Parameter(s)

None

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*SRE

Description

The *SRE command sets the Service Request

Enable Register bits. See the contents of this

value to enable the bits in the Status Byte

Serv ice Request Enable

MSB

LSB

N.U.

ESB

MAV

N.U.

EAV

N.U.

Syntax

*SRE<wsp><RegisterValue>

Parameter(s)

RegisterValue:

The program data syntax for <RegisterValue> is

defined as a <DECIMAL NUMERIC PROGRAM

DATA> element.

The <RegisterValue> value ranges from 0

through 255.

The <RegisterValue>, expressed in base 2

(binary), represents the bit values of the Service

Request Enable Register.

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*SRE

See the contents of this register below.

Bit

Weight

Meaning

N.U.

128

Not used

N.U.

Not used

ESB

Event Summary Bit Enable

MAV

Message AVailable Enable

N.U.

Not used

EAV

Error / Event AVailable Enable

N.U.

Not used

N.U.

Not used

A bit value of zero shall indicate a disabled

condition.

Example(s)

*SRE 52

where 52 = (bit ESB, bit MAV and bit EAV)

See Also

*SRE?

*STB?

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*SRE?

Description

With the *SRE? query you can determine the

current contents of the Service Request Enable

Serv ice Request Enable

MSB

LSB

N.U.

ESB

MAV

N.U.

EAV

N.U.

Bit

Weight

Meaning

N.U.

128

Not used

N.U.

Not used

ESB

Event Summary Bit Enable

MAV

Message AVailable Enable

N.U.

Not used

EAV

Error / Event AVailable Enable

N.U.

Not used

N.U.

Not used

Syntax

*SRE?

Parameter(s)

None

Response Syntax

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FTB-2 and FTB-2 Pro

IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*SRE?

Response(s)

RegisterValue:

The response data syntax for <RegisterValue> is

defined as a <NR1 NUMERIC RESPONSE DATA>

element.

The <RegisterValue> ranges from 0 through 255.

When converted to binary (base 2), the

<RegisterValue> represents the current bit

values of the Service Request Enable Register.

Example(s)

*SRE returns 32 (bit ESB)

See Also

*SRE

*STB?

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399

IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*STB?

Description

With the *STB? query you can read the status

byte and Master Summary Status bit. See the

content of this register below.

MSB

Status By te Register

LSB

RQS/

N.U.

ESB

MAV

N.U.

EAV

N.U.

MSS

Syntax

*STB?

Parameter(s)

None

Response Syntax

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FTB-2 and FTB-2 Pro

IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*STB?

Response(s)

RegisterValue:

The response data syntax for <RegisterValue> is

defined as a <NR1 NUMERIC RESPONSE DATA>

element.

The <RegisterValue> ranges from 0 through 255.

The <RegisterValue> value, expressed in base 2

(binary) represents the bit values of the Status

Byte Register. See the contents of this register

below.

Bit

Weight

Meaning

N.U.

128

Not used

RQS/

ReQuest Service (read by serial

MSS

polling)/MaSter Summary bit

(read by *STB?)

ESB

Event Summary Bit Enable

MAV

Message AVailable Enable

N.U.

Not used

EAV

Error / Event AVailable Enable

N.U.

Not used

N.U.

Not used

Example(s)

*STB? returns 68

where 68 = (bit MSS and bit EAV)

See Also

*SRE

*SRE?

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401

IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*TST?

Description

The *TST? query causes an internal self-test and

places a response into the Output Queue

indicating whether or not the device completed

the self-test without any detected errors. Upon

successful completion of *TST?, the device

settings is restored to their values prior to the

*TST?.

Syntax

*TST?

Parameter(s)

None

Response Syntax

Response(s)

Result:

The response data syntax for <Result> is

defined as a <NR1 NUMERIC RESPONSE DATA>

element.

The <Result> value ranges from -32767 through

+32767.

A <Result> with a value of zero indicates that

the self-test has been completed without errors

detected. A <Result> with a value not equal to

zero indicates that the self-test was not

completed or was completed with errors

detected.

Example(s)

*TST? returns 0

(self-test was completed with success)

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IEEE 488.2 and Specific Command Reference

IEEE 488.2 Required Commands

*WAI

Description

The *WAI command shall prevent the device

from executing any further commands or queries

until the no-operation-pending flag becomes

TRUE.

Syntax

*WAI

Parameter(s)

None

Example(s)

*WAI

See Also

*OPC

*OPC?

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IEEE 488.2 and Specific Command Reference

Specific Commands—Quick Reference

The table below contains a summary of the FTB-2 and FTB-2 Pro specific

commands. These commands are fully explained on the following pages.

Command

Parameter(s)

FORMat

[DATA]

ASCii|PACKed[,<Length>]

[DATA]?

INSTrument

CATalog?

CATalog

FULL?

SYSTem

DATE

DATE?

ERRor

[NEXT]?

TIME

TIME?

VERSion?

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FTB-2 and FTB-2 Pro

IEEE 488.2 and Specific Command Reference

Specific Commands

:FORMat[:DATA]

Description

The FORMat[:DATA] command selects the data

format and <Length>. The <Length>

parameter is optional for all data format, its

meaning is dependent on the data format

selected.

If PACKed type is selected, the data is transferred

in a <DEFINITE BLOCK RESPONSE DATA>. The

ASCii-type data is automatically identified by its

syntax. Therefore, in these cases, the FORMat

subsystem is only necessary to determine the

output format.

At *RST, ASCii is selected as the default data

format and the <Length> is set to 0.

Syntax

:FORMat[:DATA]<wsp>ASCii|PACKed[,<Lengt

h>]

Parameter(s)

 Type:

The program data syntax for the first parameter is

defined as a <CHARACTER PROGRAM DATA>

element. The allowed <CHARACTER PROGRAM

DATA> elements for this parameter are:

ASCii|PACKed.

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IEEE 488.2 and Specific Command Reference

Specific Commands

:FORMat[:DATA]

In ASCii format, the numeric data is transferred

to ASCii bytes in <NR1 NUMERIC RESPONSE

DATA>, <NR2 NUMERIC RESPONSE DATA> or

representation, as appropriate.

In PACKed format, data is transferred to a

<DEFINITE BLOCK RESPONSE DATA>, in a

manner specified in the device documentation.

 Length:

The program data syntax for <Length> is

defined as a <DECIMAL NUMERIC PROGRAM

DATA> element.

When ASCii data format is selected, the optional

<Length> parameter specifies the number of

significant digits to be returned. A <Length>

value of zero indicates that the device selects the

number of significant digits to be returned. When

a <Length> of zero has been specified, the

FORMat[:DATA]? query returns zero as its second

parameter.

When the PACKed data format is selected, the

optional parameter <Length> it not used.

Example(s)

FORM ASC

FORM ASC,6

FORM:DATA PACKED

See Also

FORMat[:DATA]?

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FTB-2 и FTB-2 Pro. Руководство пользователя - часть 26