TVS600 & TVS600A Series
Waveform Analyzers Command Reference
070-9917-00
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to the Safety Summary prior to
performing service.
This document supports firmware
version 1.5 and above.
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Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
To Avoid Fire or
Personal Injury
Connect and Disconnect Properly . Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
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. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Replace Batteries Properly. Replace batteries only with the proper type and rating
specified.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry .
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
TVS600 & TVS600A Command Reference
xv
General Safety Summary
Symbols and Terms
T erms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
T erms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
WARNING
High Voltage
Protective Ground
(Earth) T erminal
CAUTION
Refer to Manual
Double
Insulated
xvi
TVS600 & TVS600A Command Reference
Preface
This manual is the command reference for the TVS600 & TVS600A Series
Waveform Analyzers. These waveform analyzers are controlled through the use
of SCPI (Standard Commands for Programmable Instruments) derived commands and IEEE 488.2 Common Commands. This manual describes how to use
these commands to configure the waveform analyzer and access information
generated by it or stored within it.
Related Manuals
This manual is part of a document set of standard accessory manuals and online
documentation. This manual is the reference for thr SCPI command used by the
waveform analyzer. The following documents support TVS600 and TVS600A
operation and service:
Manual NameDescription
TVS600 & TVS600A Series
Waveform Analyzers Reference
TVS600 & TVS600A Series
Waveform Analyzers Users Manual
TVS600A Online SFP Help
for the VXIplug&play Soft Front Panel
TVS600A Online Driver Help
for the VXIplug&play Driver
TVS600 & TVS600A Series
Waveform Analyzers Service Manual
Provides an alphabetical listing of the programming commands. It is the quick
command reference and is a standard accessory.
Describes installation of and the features of the waveform analyzer. It is a standard
accessory.
Documents the Soft Front Panel, an application that ships with this product. The
TVS600A VXIplug&play software is a standard accessory included with the waveform
analyzer product.
Documents the robust library of functions that ships with this product. The TVS600A
VXIplug&play software is a standard accessory included with this user manual.
Describes how to service the instrument to the module level. This optional manual must
be ordered separately.
The TVS600 Series Waveform Analyzers Reference (Tektronix part number
070-9284-XX) provides an alphabetical listing of the programming
commands. This manual is a standard accessory.
The TVS600 Series Waveform Analyzers Service Manual (Tektronix part
number 070-9285-XX) describes how to service the instrument to the
module level. This optional manual must be ordered separately.
TVS600 & TVS600A Command Reference
xvii
Preface
Default Model
This manual documents the TVS621, TVS621A, TVS625, TVS625A, TVS641,
TVS641A, TVS645, and TVS645A waveform analyzers. Take note of the
following conventions used when referencing these products:
Generally, the name “TVS600A” (or just “waveform analyzer”) is used when
providing information common to the TVS600 and TVS600A series of
waveform analyzers.
The labels “TVS600 only” and “TVS600A only” are used when providing
information that pertains only to those models.
The more specific names, listed above, are used when providing information
that pertains only to a specific model, such as the TVS625A.
xviii
TVS600 & TVS600A Command Reference
Command Syntax
Command Syntax
This section contains information on the Standard Commands for Programmable
Instruments (SCPI) and IEEE 488.2 Common Commands you can use to
program your waveform analyzer.
SCPI Commands and Queries
SCPI is a standard created by a consortium that provides guidelines for remote
programming of instruments. These guidelines provide a consistent programming environment for instrument control and data transfer. This environment
uses defined programming messages, instrument responses, and data format
across all SCPI instruments, regardless of manufacturer. The waveform analyzer
uses a command language based on the SCPI standard.
The SCPI language is based on a hierarchical or tree structure (see Figure 1–1)
that represents a subsystem. The top level of the tree is the root node; it is
followed by one or more lower-level nodes.
Creating Commands
Figure 1–1: Example of SCPI subsystem hierarchy tree
You can create commands and queries from these subsystem hierarchy trees.
Commands specify actions for the instrument to perform. Queries return
measurement data and information about parameter settings.
SCPI commands are created by stringing together the nodes of a subsystem
hierarchy and separating each node by a colon.
In Figure 1–1, OUTPUT is the root node and TTLTRG, STATE, POLARITY,
and SOURCE are lower-level nodes. To create a SCPI command, start with the
root node OUTPUT and move down the tree structure adding nodes until you
reach the end of a branch. Most commands and some queries have parameters;
you must include a value for these parameters. If you specify a parameter value
that is out of range, the parameter will be generally set to a default value. The
Root node
Lower-level
nodes
TVS600 & TVS600A Command Reference
1–1
Command Syntax
command descriptions, which start on page 2–1, list the valid values for all
parameters.
For example, OUTPUT:TTLTRG1:STATE ON is a valid SCPI command created
from the hierarchy tree in Figure 1–1.
Creating Queries
Parameter Types
To create a query, start at the root node of a tree structure, move down to the end
of a branch, and add a question mark. OUTPUT:TTLTrg:STATe? is an example
of a valid SCPI query using the hierarchy tree in Figure 1–1.
Every parameter in the command and query descriptions is of a specified type.
The parameters are enclosed in brackets, such as <pattern>. The parameter type
is listed after the parameter and is enclosed in parentheses, for example,
(discrete). Some parameter types are defined specifically for the waveform
analyzer command set and some are defined by ANSI/IEEE 488.2-1992 (see
Table 1–1).
1–2
TVS600 & TVS600A Command Reference
Command Syntax
T able 1–1: Parameter types used in syntax descriptions
Parameter TypeDescriptionExample
binaryBinary numbers#B01 10
binary block
booleanBoolean numbers or valuesON or 1
discreteA list of specific valuesHIGH, LOW, MID, PRBS23
hexadecimal
NR1
NR22 numericDecimal numbers1.2, 3.141516, –6.5
NR32 numericFloating point numbers3.1415E–9, –16.1E5
1
A specified length of binary data#512234xxxxx . . . where 5
indicates that the following 5
digits (12234) specify the length
of the data in bytes; xxxxx ...
indicates the binary data
OFF or 0
2
Hexadecimal numbers
#HAA, #H1
(0–9, A, B, C, D, E, F)
2,3
numericIntegers0, 1, 15, –1
NRf2 numericFlexible decimal number that
See NR1, NR2, NR3 examples
may be type NR1, NR2 or NR3
4
string
Alphanumeric characters (must
“Testing 1, 2, 3”
be within quotation marks)
1
Defined in ANSI/IEEE 488.2 as “Definite Length Arbitrary Block Response Data.”
2
An ANSI/IEEE 488.2–1992-defined parameter type.
3
Some commands and queries will accept a hexadecimal value even though the
parameter type is defined as NR1.
4
Defined in ANSI/IEEE 488.2 as “String Response Data.”
TVS600 & TVS600A Command Reference
1–3
Command Syntax
Abbreviating Commands,
Queries, and Parameters
You can abbreviate most SCPI commands, queries, and parameters to an
accepted short form. This manual shows these short forms as a combination of
upper and lower case letters. The upper case letters indicate the accepted short
form of a command. As shown in Figure 1–2, you can create a short form by
using only the upper case letters. The accepted short form and the long form are
equivalent and request the same action of the instrument.
Long form of a
command
Accepted short form
of a command and
parameter
Minimum information needed
for accepted short form
Figure 1–2: Example of abbreviating a command
NOTE. The numeric part of a command or query must always be included in the
accepted short form. In Figure 1–2, the “1” of “TTLTRG1” is always included
in the command or query.
Chaining Commands and
Queries
1–4
You can chain several commands or queries together into a single message. To
create a chained message, first create a command or query, add a semicolon (;),
and then add more commands or queries and semicolons until you are done. If
the command following a semicolon is a root node, precede it with a colon (:).
Figure 1–3 illustrates a chained message consisting of several commands and
queries. A semicolon is not required after the final end or query in a chained
message. Responses to any queries in your message are separated by semicolons.
Response from first queryResponse from second query
Command
1.0E-6;1536
Figure 1–3: Example of chaining commands and queries
If a command or query has the same root and lower-level nodes as the previous
command or query, you can omit these nodes. In Figure 1–4, the second
command has the same root node (TRIG) as the first command, so these nodes
can be omitted.
TRIG:SOUR INT1;:TRIG:SLOP NEG;:TRIG:LEV -2
Identical root and lower-level nodes
TRIG:SOUR INT1;SLOP NEG;LEV -2
First query
Figure 1–4: Example of omitting root and lower-level nodes in chained message
General Rules
Here are some general rules for using SCPI commands, queries, and parameters:
You can use single (‘ ’) or double (“ ”) quotation marks for quoted strings,
but you cannot use both types of quotation marks for the same string.
correct:“This string uses quotation marks correctly.”
correct:‘This string also uses quotation marks correctly.’
incorrect:“This string does not use quotation marks correctly.’
TVS600 & TVS600A Command Reference
First command Additional commands
(omitted the root nodes)
1–5
Command Syntax
You can use upper case, lower case, or a mixture of both cases for all
commands, queries, and parameters.
OUTPUT1:TTLTRG:POLARITY INVERTED
is the same as
output1:ttltrg:polarity inverted
and
OUTPUT1:ttltrg:polarity INVERTED
No embedded spaces are allowed between or within nodes.
correct:OUTPUT1:TTLTRG:POLARITY INVERTED
incorrect:OUTPUT1: TTLTRG: POLARITY INV ERTED
IEEE 488.2 Common Commands
Description
Command and Query
Structure
ANSI/IEEE Standard 488.2 defines the codes, formats, protocols, and usage of
common commands and queries used on the interface between the controller and
the instruments. The waveform analyzer complies with this standard.
The syntax for an IEEE 488.2 common command is an asterisk (*) followed by a
command and, optionally, a space and parameter value. The syntax for an
IEEE 488.2 common query is an asterisk (*) followed by a query and a question
mark. All of the common commands and queries are listed in the last part of the
Syntax and Commands section. The following are examples of common
commands:
*ESE 16
*CLS
The following are examples of common queries:
*ESR?
*IDN?
1–6
TVS600 & TVS600A Command Reference
Command Syntax
Backus-Naur Form
Definition
Message Terminators
This manual may describe commands and queries using the Backus-Naur Form
(BNF) notation. Table 1–2 defines the standard BNF symbols:
T able 1–2: BNF symbols and meanings
SymbolMeaning
<ą>Defined element
::=Is defined as
|Exclusive OR
{ą}Group; one element is required
[ą]Optional; can be omitted
.ă.Ă.Previous element(s) may be repeated
(ą)Comment
This manual uses <EOM> (End of message) to represent a message terminator.
SymbolMeaning
<EOM>Message terminator
The end-of-message terminator may be the END message (EOI asserted
concurrently with the last data byte), the ASCII code for line feed (LF) sent as
the last data byte, or both. The waveform analyzer always terminates messages
with LF and EOI. It allows white space before the terminator.
Constructed Mnemonics
Some header mnemonics specify one of a range of mnemonics. For example, a
channel mnemonic can be either INP1, INP2, INP3, or INP4. You use these
mnemonics in the command just as you do any other mnemonic. For example,
there is a INP1:FILT command, and there is also an INP2:FILT command. In the
command descriptions, this list of choices is abbreviated as INP<n>.
TVS600 & TVS600A Command Reference
1–7
Command Syntax
Block Arguments
Several waveform analyzer commands use a block argument form:
SymbolMeaning
<NZDig>A non-zero digit character, in the range 1–9
<Dig>A digit character, in the range 0–9
<DChar>A character with the hex equivalent of 00 through FF
hexadecimal (0 through 255 decimal)
<Block>A block of data bytes, defined as:
<Block> ::=
{ #<NZDig><Dig>[<Dig>...][<DChar>...]
| #0[<DChar>...]<terminator> }
<NZDig> specifies the number of <Dig> elements that follow. Taken together, the
<Dig> elements form a decimal integer that specifies how many <DChar>
elements follow. The #0 format is for blocks of indifinite length and an END
message termination is required.
1–8
TVS600 & TVS600A Command Reference
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