Anritsu MG369XA Series Owner's manual

SERIES
MG369XA
SYNTHESIZED SIGNAL GENERATORS
GPIB PROGRAMMING MANUAL
P/N: 10370-10354
REVISION: D
PRINTED: JANUARY 2004
COPYRIGHT 2004 ANRITSU CO.
490 JARVIS DRIVE
MORGAN HILL, CA 95037-2809

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workmanship for one year from the date of shipment.
Anritsu's obligation covers repairing or replacing products which prove to be defective during the
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tial damages.
LIMITATION OF WARRANTY
The foregoing warranty does not apply to Anritsu connectors that have failed due to normal wear.
Also,the warranty does not apply to defects resulting from improper or inadequate maintenance by
the Buyer, unauthorized modification or misuse,or operation outside of the environmental specifica-
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Table of Contents
Chapter 1 General GPIB Information
1-1 Scope of Manual ............................1-3
1-2 Introduction ..............................1-3
1-3 IEEE-488 Interface Bus Description .................1-5
Functional Elements .....................1-6
Bus Structure ........................1-7
Data Bus Description.....................1-7
Data Byte Transfer Control Bus Description .........1-8
General Interface Management Bus Description........1-9
Device Interface Function Capability ............1-10
Message Types .......................1-11
1-4 MG369XA GPIB Operation......................1-13
Setting GPIB Operating Parameters.............1-13
Interface Language .....................1-13
Response to GPIB Interface Function Messages .......1-13
Chapter 2 Programming with GPIB Commands
2-1 Introduction ..............................2-3
2-2 Command Codes ............................2-3
2-3 Data Input Restrictions ........................2-6
2-4 Parameter and Data Entry Commands ................2-7
Opening a Parameter.....................2-7
Data Entry..........................2-7
Using the SYZ Command ..................2-18
2-5 CW Frequency Commands ......................2-19
2-6 Analog and Step Sweep Commands .................2-21
Sweep Range ........................2-21
Alternate Sweep.......................2-21
Sweep Triggering ......................2-22
Analog/Step Sweep Select ..................2-24
Special Step Sweep .....................2-26
2-7 Frequency Marker Commands....................2-27
MG369XA PM i

2-8 Output Power Leveling Commands .................2-28
Linear or Logarithmic Power Level Selection.........2-28
RF Output Power Level Selection ..............2-28
Alternate Sweep RF Output Power Level Selection......2-28
Output Power Leveling ...................2-28
ALC Power Slope ......................2-31
Attenuator Decoupling ...................2-31
2-9 Modulation Commands........................2-32
Amplitude Modulation....................2-32
Frequency Modulation....................2-33
Phase Modulation ......................2-34
Pulse Modulation ......................2-35
2-10 Measure Function Commands ....................2-39
2-11 Output Commands ..........................2-40
2-12 Stored Setup Commands .......................2-44
2-13 SRQ and Status Byte Commands ..................2-46
Status Bytes ........................2-46
SRQ Generation.......................2-46
2-14 Configuration Commands ......................2-50
2-15 Group Execute Trigger Commands .................2-51
2-16 List Sweep Commands ........................2-52
Accessing and Editing a List.................2-52
List Sweep Triggering....................2-53
Generating a List Sweep ..................2-54
2-17 Fast-Frequency- Switching Commands ...............2-55
Loading the Frequency Table ................2-55
2-18 Power-Offset-Table Commands....................2-59
Loading the Power-Offset Table ...............2-59
2-19 User Level Calibration Commands .................2-62
Editing the Table Data ...................2-66
2-20 Master-Slave Operation Commands .................2-70
2-21 Self Test Command ..........................2-71
2-22 Miscellaneous Commands ......................2-73
ii MG369XA PM
Table of Contents (Continued)

2-23 Program Errors............................2-74
Invalid Parameter......................2-74
Syntax ...........................2-74
2-24 Reset Programming and Default Conditions ............2-75
2-25 Programming Examples .......................2-76
SDT
Chapter 3 Command Dictionary
3-1 Introduction ..............................3-3
3-2 Typographic Conventions .......................3-3
3-3 Functional Categories .........................3-3
3-4 Commands ...............................3-3
*IDN?ACWAD1AD5AD6ADDADP1ADP2ADRAF1AF3AFUAL0AL1AL2AL3AL4AL5AL6AL7AL8AL9AM0AM1AM2AM7AM8AMIAMOAMRAMSAMW(x)ASDAT0AT1ATT(xx)AUTBPNBPPCF0CF1CF2CF3CF4CF5CF6CF7CF8CF9CLOCLRCM0CM1CM2CM3CM4CM5CM6CM7CM8CM9CS0CS1CSBCTLD1D2D3D4DBDF0DF1DF5DF6DFFDFMDGDL1DLFDMDNDPTDS0DS1DU0DU1DVEGIEGOEL0EL1ELI(xxxx)ELN(x)EP0EP1ES0ES1EXTF0F1F2F3F4F5F6F7F8F9FB0FB1FDVFM0FM1FM2FM7FM8FM9FMDFMLFMNFMRFMSFMUFMWFRSFULFWV(x)GHGPGTCGTDGTFGTLGTOGTSGTTGTUGVHWTHZII0II1IL1IM1IPKHKVL0L1L2L3L4L5L6L7L8L9LA0LA1LDTLE0LE1LEALFLGSLIB(xxxx)LIE(xxxx)LINLISLO0LO1LOGLOSLPLS0LS1LSPLSTLU0LU1LU2LU3LU4LU5LURLUSLV0LV1LVPM0M1M2M3M4M5M6M7M8M9MANMB0MB1MB2ME0ME1MHMKOMNTMOMMPNMPPMSMVNSOABOAD1OAD2OAROASOAWOD1OD2OD3OD4ODDODEODFODLODPODSOEMOESOF0OF1OF2OF3OF4OF5OF6OF7OF8OF9OFDOFHOFKOFLOFMOFROFSOFWOIOL0OL1OL2OL3OL4OL5OL6OL7OL8OL9OLOOM0OM1OM2OM3OM4OM5OM6OM7OM8OM9OMDOMMOOOP5OPCOPDOPHDOPHMOPHROPHSOPHWOPMOPOOPPOPROPSOPTOPWOSBOSDOSEOSMOSROSSOSTOVNOW1OW2OW3OW4OWTP0PC1PC4PCTPCVPDTPDYPE0PE1PERPH0PH1PH2PH7PH8PHDPHNPHRPHSPHV(x)PHWPL1PM0PM1PMD(x)PNSPRPS0PS1PSOPSZPT0PT1PTCPTFPTG(x)PTLPTRPU0PU1PU2PVTPWRC0RC1RCFRCMRDRF0RF1RLRO0RO1RSN(m)RSSRSTRT0RT1RVS0S1SAFSAMSB0SB1SC0SC1SD0SD1SDDSDESDLSDSSDTSE0SE1SECSF1SF3SL0SL1SLDFSLF0SLF1SLF2SLF3SLF4SLF5SLF6SLF7SLF8SLF9SLL1SLL2SLM0SLM1SLM2SLM3SLM4SLM5SLM6SLM7SLM8SLM9SLPSLVSMSNRSNSSOFSP0SP1SPSSQ0SQ1SQDSQFSQPSQUSSN(m)SSPSW0SW1SW2SW3SW4SWPSWTSYZTEXTMSTR0TR1TRGTRSTSSTSTUL0UL1UPUSVM1VTW1W2W3W4XL0XL1XL2XL3XL4XL5XL6XL7XL8XL9XPYZELZL(x)ZPN(bbbb)ZS(x)ZTL(bbbbnnnnD8D8D8…D8)
Appendix A GPIB Quick Reference
A-1 Introduction ..............................A-1
A-2 Alphabetical Listing ..........................A-1
A-3 Functional Listings..........................A-20
MG369XA PM iii/iv
Table of Contents (Continued)

Table of Contents
1-1 Scope of Manual ............................1-3
1-2 Introduction ..............................1-3
1-3 IEEE-488 Interface Bus Description .................1-5
Functional Elements .....................1-6
Bus Structure ........................1-7
Data Bus Description.....................1-7
Data Byte Transfer Control Bus Description .........1-8
General Interface Management Bus Description........1-9
Device Interface Function Capability ............1-10
Message Types .......................1-11
1-4 MG369XA GPIB Operation......................1-13
Setting GPIB Operating Parameters.............1-13
Interface Language .....................1-13
Response to GPIB Interface Function Messages .......1-13
Chapter 1
General GPIB Information

Chapter 1
General GPIB Information
1-1 Scope of Manual This manual provides information for remote operation of the Series
MG369XA Synthesized Signal Generator using commands sent from
an external controller via the IEEE-488 General Purpose Interface
Bus (GPIB). It includes the following:
qA general description of the GPIB and the bus data transfer and
control functions
qA listing of the IEEE-488 Interface Function Messages
recognized by the signal generator with a description of its
response
qA complete listing and description of all MG369XA GPIB
commands (i.e., Product Specific Commands) that can be used to
control signal generator operation with programming examples
This manual is intended to be used in conjunction with the Series
MG369XA Synthesized Signal Generator Operation Manual, P/N
10370-10353. Refer to that manual for general information about the
MG369XA, including equipment set up and front panel (manual mode)
operating instructions.
1-2 Introduction This chapter provides a general description of the GPIB and the bus
data transfer and control functions. It also contains a listing of the
MG369XA's GPIB interface function subset capability and response to
IEEE-488 interface function messages.
The GPIB information presented in this chapter is general in nature.
For complete and specific information, refer to the following docu-
ments: ANSI/IEEE Std 488.1-1987 IEEE Standard Digital Interface
for Programmable Instrumentation and ANSI/IEEE Std 488.2-1987
IEEE Standard Codes, Formats, Protocols and Common Commands.
These documents precisely define the total specification of the me-
chanical and electrical interface, and of the data transfer and control
protocols.
MG369XA PM 1-3

Introduction General GPIB Information
1-4 MG369XA PM
H A N D S H A K E L i n e s
( 3 s i g n a l l i n e s )
( 5 s i g n a l l i n e s )
D A T A L I N E S
D a t a B y t e T r a n s f e r
C o n t r o l B u s
D a t a B u s
G e n e r a l I n t e r f a e
M a n a g e m e n t B u s
I E E E - 4 8 8 B U S ( 1 6 L i n e s )
( 8 s i g n a l l i n e s )
M a n a g e m e n t
C O N T R O L L i n e s
D E V I C E A
A b l e t o t a l k , l i s t e n ,
a n d o n t r o l
( e . g . C O M P U T E R )
D E V I C E B
A b l e t o t a l k a n d l i s t e n
( e . g . M G 8 0 A
C W
G E N E R A T O R )
D E V I C E D
O n l y a b l e t o t a l k
( e . g . O T H E R
I N S T R U M E N T * * )
D A V - D A T A V A L I D
N R F D - N O T R E A D Y F O R D A T A *
N D A C - N O T D A T A A C C E P T E D *
I F C - I N T E R F A C E C L E A R
A T N - A T T E N T I O N
S R Q - S E R V I C E R E Q U E S T
R E N - R E M O T E E N A B L E
E O I - E N D O R I D E N T I F Y
D E V I C E C
O n l y a b l e t o l i s t e n
( e . g . O T H E R
I N S T R U M E N T * * )
D A T A I N P U T / O U T P U T ,
D I O 1 t h r u D I O 8
* N E G A T I O N I S R E P R E S E N T E D B Y
L O W S T A T E O N T H E S E T W O L I N E S
* * I F U S E D
Figure 1-1. Interface Connections and GPIB Bus Structure

1-3 IEEE-488 Interface
Bus Description The IEEE-488 General Purpose Interface Bus (GPIB) is an instrumen-
tation interface for integrating instruments, computers, printers, plot-
ters, and other measurement devices into systems. The GPIB uses 16
signal lines to effect transfer of information between all devices con-
nected on the bus.
The following requirements and restrictions apply to the GPIB.
qNo more than 15 devices can be interconnected by one contiguous
bus; however, an instrumentation system may contain more than
one interface bus
qThe maximum total cumulative cable length for one interface bus
may not exceed twice the number of devices connected (in me-
ters), or 20 meters—whichever is less
qA maximum data rate of 1 Mb/s across the interface on any sig-
nal line
qEach device on the interface bus must have a unique address,
ranging from 00 to 30
The devices on the GPIB are connected in parallel, as shown in Fig-
ure 1-1. The interface consists of 16 signal lines and 8 ground lines in
a shielded cable. Eight of the signal lines are the data lines, DIO 1
through DIO 8. These data lines carry messages (data and commands),
one byte at a time, among the GPIB devices. Three of the remaining
lines are the handshake lines that control the transfer of message
bytes between devices. The five remaining signal lines are referred to
as interface management lines.
The following paragraphs provide an overview of the GPIB including a
description of the functional elements, bus structure, bus data transfer
process, interface management bus, device interface function require-
ments, and message types.
General GPIB Information IEEE-488 Interface Bus Description
MG369XA PM 1-5

Functional
Elements Effective communications between devices on the
GPIB requires three functional elements; a talker,a
listener, and a controller. Each device on the GPIB is
categorized as one of these elements depending on
its current interface function and capabilities.
Talker
A talker is a device capable of sending device-
dependent data to another device on the bus when
addressed to talk. Only one GPIB device at a time
can be an active talker.
Listener
A listener is a device capable of receiving device-
dependent data from another device on the bus
when addressed to listen. Any number of GPIB de-
vices can be listeners simultaneously.
Controller
A controller is a device, usually a computer, capable
of managing the operation of the GPIB. Only one
GPIB device at a time can be an active controller.
The active controller manages the transfer of device-
-dependent data between GPIB devices by designat-
ing who will talk and who will listen.
System Controller
The system controller is the device that always re-
tains ultimate control of the GPIB. When the system
is first powered-up, the system controller is the ac-
tive controller and manages the GPIB. The system
controller can pass control to a device, making it the
new active controller. The new active controller, in
turn, may pass control on to yet another device.
Even if it is not the active controller, the system con-
troller maintains control of the Interface Clear (IFC)
and Remote Enable (REN) interface management
lines and can thus take control of the GPIB at any-
time.
IEEE-488 Interface Bus Description General GPIB Information
1-6 MG369XA PM

Bus
Structure The GPIB uses 16 signal lines to carry data and
commands between the devices connected to the
bus. The interface signal lines are organized into
three functional groups.
qData Bus (8 lines)
qData Byte Transfer Control Bus (3 lines)
qGeneral Interface Management Bus (5 lines)
The signal lines in each of the three groups are des-
ignated according to function. Table 1-1 lists these
designations.
Data Bus
Description The data bus is the conduit for the transfer of data
and commands between the devices on the GPIB. It
contains eight bi-directional, active-low signal lines
—DIO 1 through DIO 8. Data and commands are
transferred over the data bus in byte-serial, bit--
parallel form. This means that one byte of data
(eight bits) is transferred over the bus at a time.
DIO 1 represents the least-significant bit (LSB) in
this byte and DIO 8 represents the most-significant
bit (MSB). Bytes of data are normally formatted in
seven-bit ASCII (American Standard Code for Infor-
mation Interchange) code. The eighth (parity) bit is
not used.
Each byte placed on the data bus represents either a
command or a data byte. If the Attention (ATN) in-
terface management line is TRUE while the data is
transferred, then the data bus is carrying a bus
command which is to be received by every GPIB de-
vice. If ATN is FALSE, then a data byte is being
transferred and only the active listeners will receive
that byte.
General GPIB Information IEEE-488 Interface Bus Description
MG369XA PM 1-7
Bus Type Signal Line
Name Function
Data Bus DIO1–DIO8 Data Input/Output, 1 thru 8
Data Byte
Transfer
Control Bus
DAV
NRFD
NDAC
Data Available
Not Ready For Data
Not Data Accepted
General
Interface
Management
Bus
ATN
IFC
SRQ
REN
EOI
Attention
Interface Clear
Service Request
Remote Enable
End Or Identify
Table 1-1. Interface Bus Signal Line Designations

Data Byte
Transfer
Control Bus
Description
Control of the transfer of each byte of data on the
data bus is accomplished by a technique called the
“three-wire handshake”, which involves the three
signal lines of the Data Byte Transfer Control Bus.
This technique forces data transfers at the speed of
the slowest listener, which ensures data integrity in
multiple listener transfers. One line (DAV) is con-
trolled by the talker, while the other two (NRFD and
NDAC) are wired-OR lines shared by all active lis-
teners. The handshake lines, like the other GPIB
lines, are active low. The technique is described
briefly in the following paragraphs and is depicted
in Figure 1-2. For further information, refer to
ANSI/IEEE Std 488.1.
DAV (Data Valid)
This line is controlled by the active talker. Before
sending any data, the talker verifies that NDAC is
TRUE (active low) which indicates that all listeners
have accepted the previous data byte. The talker
then places a byte on the data lines and waits until
NRFD is FALSE (high) which indicates that all ad-
dressed listeners are ready to accept the informa-
tion. When both NRFD and NDAC are in the proper
state, the talker sets the DAV line TRUE (active
low) to indicate that the data on the bus is valid
(stable).
NRFD (Not Ready For Data)
This line is used by the listeners to inform the
talker when they are ready to accept new data. The
talker must wait for each listener to set the NRFD
line FALSE (high) which they will do at their own
rate. This assures that all devices that are to accept
the data are ready to receive it.
NDAC (Not Data Accepted)
This line is also controlled by the listeners and is
used to inform the talker that each device addressed
to listen has accepted the data. Each device releases
NDAC at its own rate, but NDAC will not go FALSE
(high) until the slowest listener has accepted the
data byte.
IEEE-488 Interface Bus Description General GPIB Information
1-8 MG369XA PM
1st Data Byte 2nd Data Byte
Valid Not
Valid Valid Not Valid
All
Ready None Ready All Ready None Ready
All
Accept
None
Accept None Accept All Accept
DIO1-DIO8
(composite)
DAV
NRFD
NDAC
Figure 1-2. Typical GPIB Handshake Operation

General
Interface
Management
Bus
Description
The general interface management bus is a group of
five signal lines used to manage the flow of informa-
tion across the GPIB. A description of the function of
each of the individual control lines is provided be-
low.
ATN (Attention)
The active controller uses the ATN line to define
whether the information on the data bus is a com-
mand or is data. When ATN is TRUE (low), the bus
is in the command mode and the data lines carry
bus commands. When ATN is FALSE (high), the bus
is in the data mode and the data lines carry device-
dependent instructions or data.
EOI (End or Identify)
The EOI line is used to indicate the last byte of a
multibyte data transfer. The talker sets the EOI line
TRUE during the last data byte.
The active controller also uses the EOI line in con-
junction with the ATN line to initiate a parallel poll
sequence.
IFC (Interface Clear)
Only the system controller uses this line. When IFC
is TRUE (low), all devices on the bus are placed in a
known, quiescent state (unaddressed to talk, unad-
dressed to listen, and service request idle).
REN (Remote Enable)
Only the system controller uses this line. When
REN is set TRUE (low), the bus is in the remote
mode and devices are addressed either to listen or to
talk. When the bus is in remote and a device is ad-
dressed, it receives instructions from the GPIB
rather than from its front panel. When REN is set
FALSE (high), the bus and all devices return to local
operation.
SRQ (Service Request)
The SRQ line is set TRUE (low) by any device re-
questing service by the active controller.
General GPIB Information IEEE-488 Interface Bus Description
MG369XA PM 1-9

Device
Interface
Function
Capability
An interface function is the GPIB system element
which provides the basic operational facility through
which a device can receive, process, and send mes-
sages. Each specific interface function may only
send or receive a limited set of messages within par-
ticular classes of messages. As a result, a set of in-
terface functions is necessary to achieve complete
communications among devices on the GPIB.
ANSI/IEEE Std 488.1 defines each of the interface
functions along with its specific protocol.
ANSI/IEEE Std 488.2 specifies the minimum set of
IEEE 488.1 interface capabilities that each GPIB
device must have. This minimum set of interface
functions assures that the device is able to send and
receive data, request service, and respond to a
device clear message. Table 1-2 lists the interface
function capability of the series MG369XA signal
generator.
IEEE-488 Interface Bus Description General GPIB Information
1-10 MG369XA PM
Function
Identifier Function MG369XA Capability
AH1 Acceptor Handshake Complete Capability
SH1 Source Handshake Complete Capability
T6 Talker No Talk Only (TON)
L4 Listener No Listen Only (LON)
SR1 Service Request Complete Capability
RL1 Remote/Local Complete Capability
PP1 Parallel Poll Complete Capability
DC1 Device Clear Complete Capability
DT1 Device Trigger Complete Capability
C0, C1, C2,
C3, C28 Controller Capability
Options C0, No Capability; C1, System Controller;
C2, Send IFC and Take Charge;
C3, Send REN;
C28, Send IF Messages
E2 Tri--State Drivers Three-state bus drivers
Table 1-2. MG369XA Interface Function Capability

Message
Types There are three types of information transmitted
over the GPIB—interface function messages, device-
-specific commands, and data and instrument status
messages.
Interface Function Messages
The controller manages the flow of information on
the GPIB using interface function messages, usually
called commands or command messages. Interface
function messages perform such functions as initial-
izing the bus, addressing and unaddressing devices,
and setting device modes for remote or local opera-
tion.
There are two types of commands—multiline and
uniline. Multiline commands are bytes sent by the
active controller over the data bus (DIO1-DIO8)
with ATN set TRUE. Uniline commands are signals
carried by the individual interface management
lines.
The user generally has control over these com-
mands; however, the extent of user control depends
on the implementation and varies with the specific
GPIB interface hardware and software used with
the external controller.
Device-Specific Commands
These commands are keywords or mnemonic codes
sent by the external controller to control the setup
and operation of the addressed device or instrument.
The commands are normally unique to a particular
instrument or class of instruments and are de-
scribed in its documentation.
Device-specific commands are transmitted over the
data bus of the GPIB to the device in the form of
ASCII strings containing one or more keywords or
codes. They are decoded by the device's internal con-
troller and cause the various instrument functions
to be performed.
General GPIB Information IEEE-488 Interface Bus Description
MG369XA PM 1-11

Data and Instrument Status Messages
These messages are sent by the device to the exter-
nal controller via the GPIB. They contain measure-
ment results, instrument status, or data files that
the device transmits over the data bus in response
to specific requests from the external controller. The
contents of these messages are instrument specific
and may be in the form of ASCII strings or binary
data.
In some cases data messages will be transmitted
from the external controller to the device. For exam-
ple, messages to load calibration data.
An SRQ (service request) is an interface function
message sent from the device to the external control-
ler to request service from the controller, usually
due to some predetermined status condition or error.
To send this message, the device sets the SRQ line
of the General Interface Management Bus true, then
sends a status byte on the data bus lines.
An SRQ interface function message is also sent by
the device in response to a serial poll message from
the controller, or upon receiving an Output Status
Byte(s) command from the controller. The protocols
associated with the SRQ functions are defined in the
ANSI/IEEE Std 488.2 document.
The manner in which interface function messages
and device-specific commands are invoked in pro-
grams is implementation specific for the GPIB inter-
face used with the external controller. Even though
both message types are represented by mnemonics,
they are implemented and used in different ways.
Normally, the interface function messages are sent
automatically by the GPIB driver software in re-
sponse to invocation of a software function. For ex-
ample, to send the IFC (Interface Clear) interface
function message, one would call the ibsic function
of the National Instruments software driver. On the
other hand, the command *RST (Reset) is sent in a
command string to the addressed device. In the case
of the National Instruments example, this would be
done by using the ibwrt function call.
IEEE-488 Interface Bus Description General GPIB Information
1-12 MG369XA PM

1-4 MG369XA GPIB
Operation All Series MG369XA Synthesized Signal Generator functions, settings,
and operating modes (except for power on/standby) are controllable
using commands sent from an external controller via the GPIB. When
in the remote (GPIB) mode, the signal generator functions both as a
listener and a talker. The GPIB interface function capability of the
MG369XA is listed in Table 1-2 (page 1-10).
Setting GPIB
Operating
Parameters
The MG369XA leaves the factory with the GPIB ad-
dress value set to 5and the data delimiting termi-
nator set to carriage return and line feed (CR/LF). A
different address value can be entered from the
front panel using the Configure GPIB menu. Using
this same menu, the data delimiting terminator can
be changed to carriage return (CR) only. Refer to
Chapter 2 of the Series MG369XA Synthesized
Signal Generator Operation Manual for the proce-
dure.
Interface
Language Series MG369XA Synthesized Signal Generators
can be remotely operated using an external inter-
face language—Native. The Native interface lan-
guage uses a set of MG369XA GPIB
Product-Specific commands to control the instru-
ment.
Response to
GPIB
Interface
Function
Messages
Table 1-3 (page 1-14) lists the GPIB Interface Func-
tion Messages that the MG369XA will recognize and
respond to. With the exception of the Device Clear
and Selected Device Clear messages, these messages
affect only the operation of the MG369XA GPIB in-
terface. The MG369XA response for each message is
indicated.
Interface function messages are transmitted on the
GPIB data lines and interface management lines as
either unaddressed or addressed commands. The
manner in which these messages are invoked in pro-
grams is implementation dependent. For program-
ming information, refer to the documentation
included with the GPIB Interface for the external
controller used.
General GPIB Information MG369XA GPIB Operation
MG369XA PM 1-13

MG369XA GPIB Operation General GPIB Information
1-14 MG369XA PM
Interface Function
Message Addressed Command MG369XA Response
Device Clear (DCL)
Selected Device Clear
(SDC)
No
Yes Resets the MG369XA to its default
state. (Equivalent to sending the
*RST command.)
Go To Local (GTL) Yes Returns the MG369XA to local (front
panel) control.
Group Execute Trigger
(GET) Yes Executes a string of commands, if programmed.
Interface Clear (IFC) No Stops the MG369XA GPIB interface
from listening or talking. (The front
panel controls are not cleared.)
Local Lockout (LLO) No Disables the front panel menu
RETURN TO LOCAL soft-key.
Remote Enable (REN) No Places the MG369XA under remote
(GPIB) control when it has been
addressed to listen.
Serial-Poll Enable (SPE) No Outputs the serial-poll status byte.
Serial-Poll Disable (SPD) No Disables the serial-poll function.
Parallel-Poll Configure
(PPC) Yes Responds to a parallel-poll message (PPOLL) by setting
assigned data bus line to the logical
state (1,0) that indicates its correct
SRQ status.
Parallel-Poll Unconfigure
(PPU) No Disables the parallel-poll function.
Table 1-3. MG369XA Response to GPIB Interface Function Messages