YOKOGAWA PZ4000 User manual

IM 253710-11E
2nd Edition
Power Analyzer
Communication Interface

iIM 253710-11E
Introduction Thank you for purchasing YOKOGAWA’s PZ4000 Power Analyzer.
This Communication Interface User’s Manual describes the functions and commands of
the GP-IB and serial interfaces. To ensure proper use of the GP-IB/serial interfaces,
please read this manual thoroughly.
Keep the manual in a safe place for quick reference whenever a question arises.
Two manuals are provided with the PZ4000 including this Communication Interface
User’s Manual.
Manual Name Manual No. Description
PZ4000 Power Analyzer IM 253710-01E Describes all functions except for the
User’s Manual communications functions and operation
procedures of the instrument.
PZ4000 Power Analyzer IM 253710-11E Describes the communications functions of
Communication User’s Manual the GP-IB/serial interface.
Note • The contents of this manual are subject to change without prior notice as a result of
improvements in instrument’s performance and functions.
• Every effort has been made in the preparation of this manual to ensure the accuracy
of its contents. However, should you have any questions or find any errors, please
contact your nearest YOKOGAWA representative listed on the back cover of this
manual.
• Copying or reproduction of all or any part of the contents of this manual without
YOKOGAWA’s permission is strictly prohibited.
Trademarks • IBM PC/AT is a registered trademark of International Business Machines Corporation..
• Other product names are trademarks or registered trademarks of their respective
holders.
Revisions 1st Edition: April 1999
2nd Edition: April 2000
Disk No. BA32
2nd Edition: April 2000
All Rights Reserved, Copyright © 1999 Yokogawa Electric Corporation

ii IM 253710-11E
How to Use this Manual
Structure of this Manual
This User’s Manual consists of five chapters, an Appendix and an Index as described
below.
Chapter 1 Overview of the GP-IB Interface
Describes the functions and specifications of GP-IB.
Chapter 2 Overview of the Serial Interface
Describes the functions and specifications of serial.
Chapter 3 Before Programming
Describes formats used when sending a command.
Chapter 4 Command
Describes each command.
Chapter 5 Status Report
Describes the status byte, various registers and queues.
Chapter 6 Sample Programs
Sample programs, written in Quick-BASIC, for MS-DOS/V machines
equipped with the following GP-IB board: AT-GPIB/TNT IEEE-488.2, from
National Instruments.
Appendix Contains references including the ASCII character code table.
Index Provides an alphabetically ordered index.
Conventions Used in this Manual
• Symbols used for Notes and Keys
Type Symbol Description
Unit k 1000 e.g.: 100 kS/s (sample rate)
K 1024 e.g.: 640 KB (floppy disk memory capacity)
Note Note Provides information that is necessary for proper operation of the
instrument.
Key [Comm Device] Refers to a soft key displayed on the screen.
• Symbols used in syntax descriptions
Symbols which are used in the syntax descriptions in Chapter 4 are shown below.
These symbols are referred to as
Symbol Description Example Example of Input
<> Defined value CHANnel <x> <x>=1 to 8 →CHANNEL2
{} One of the options in {} is selected. COUPling {AC|DC|GND} →COUPLING AC
|Exclusive OR
[] Abbreviated TRIGger [:SIMPle]:SLOPe →TRIGger:SLOPer

iiiIM 253710-11E
1
2
3
4
5
6
App
Index
Contents
Introduction...................................................................................................................................... i
How to Use this Manual .................................................................................................................iii
Chapter 1 Overview of the GP-IB Interface
1.1 Names of the Parts and Their Functions...........................................................................1-1
1.2 Connecting the GP-IB Cable.............................................................................................1-2
1.3 GP-IB Interface Functions.................................................................................................1-3
1.4 GP-IB Interface Specifications .......................................................................................... 1-4
1.5 Setting Addressable Mode ................................................................................................ 1-5
1.6 Response to Interface Messages......................................................................................1-6
Chapter 2 Overview of the Serial Interface
2.1 Names of the Parts and Their Functions...........................................................................2-1
2.2 Serial Interface Functions and Specifications ................................................................... 2-2
2.3 Connecting the Serial Interface Cable ..............................................................................2-3
2.4 Handshaking .....................................................................................................................2-5
2.5 Matching the Data Format.................................................................................................2-7
2.6 Setting up this Instrument .................................................................................................2-8
Chapter 3 Before Programming
3.1 Messages..........................................................................................................................3-1
3.2 Commands........................................................................................................................3-3
3.3 Response ..........................................................................................................................3-5
3.4 Data...................................................................................................................................3-5
3.5 Synchronization with the Controller...................................................................................3-7
Chapter 4 Commands
4.1 Command Listing .............................................................................................................. 4-1
4.2 ABORt Group .................................................................................................................. 4-11
4.3 ACQuire Group ............................................................................................................... 4-11
4.4 CHANnel Group .............................................................................................................. 4-12
4.5 COMMunicate Group ...................................................................................................... 4-16
4.6 CURSor Group................................................................................................................4-18
4.7 DISPlay Group ................................................................................................................ 4-23
4.8 FILE Group......................................................................................................................4-33
4.9 HCOPy Group ................................................................................................................. 4-37
4.10 IMAGe Group .................................................................................................................. 4-40
4.11 INPut Group .................................................................................................................... 4-41
4.12 MATH Group ................................................................................................................... 4-53
4.13 MEASure Group.............................................................................................................. 4-56
4.14 NULL Group .................................................................................................................... 4-61
4.15 NUMeric Group ............................................................................................................... 4-62
4.16 SETup Group .................................................................................................................. 4-69
4.17 SSTart Group .................................................................................................................. 4-70
4.18 STARt Group................................................................................................................... 4-70
4.19 STATus Group ................................................................................................................. 4-71
4.20 STOP Group ................................................................................................................... 4-72
4.21 SYSTem Group ............................................................................................................... 4-73

iv IM 253710-11E
Contents
4.22 TIMebase Group ............................................................................................................. 4-76
4.23 TRIGger Group ...............................................................................................................4-77
4.24 WAVeform Group ............................................................................................................ 4-80
4.25 ZOOM Group .................................................................................................................. 4-83
4.26 Common Command Group ............................................................................................. 4-85
Chapter 5 Status Report
5.1 Overview of the Status Report .......................................................................................... 5-1
5.2 Status Byte........................................................................................................................ 5-2
5.3 Standard Event Register ................................................................................................... 5-3
5.4 Extended Event Register .................................................................................................. 5-4
5.5 Output Queue and Error Queue........................................................................................ 5-5
Chapter 6 Sample Program
6.1 Before Programming ......................................................................................................... 6-1
6.2 Example of Normal Measurement Data Output ................................................................ 6-2
6.3 Example of Harmonic Measurement Data Output ............................................................ 6-5
6.4 Output Example of Waveform Data in ASCII Format ........................................................ 6-7
6.5 Output Example of Waveform Data in Binary Format ....................................................... 6-9
Appendix Appendix 1 ASCII Character Code .......................................................................................App-1
Appendix 2 Error Messages .................................................................................................App-2
Appendix 3 Overview of IEEE 488.2-1987 ...........................................................................App-4
Index

Overview of the GP-IB Interface
1-1IM 253710-11E
1
Chapter 1 Overview of the GP-IB Interface
1.1 Names of the Parts and Their Functions
Front Panel
R
E
S
E
T
S
E
L
E
C
T
TRIG’ D
ACQ
REMOTE
MENU
SHIFT
CAL
NULLCOPY
LOCALHELPMISC
FILE
ZOOM
CURSOR MATH
DISPLAY
SETUP INPUT
MEASURE TRIGGER
CONFIGURATION
ELEMENT
VOLTAGE
CURRENT
FILTER
1
FILTERFILTERFILTER
234
SINGLE
START
START/STOP
CH 8 CH 6 CH 4 CH 2
CH 7 CH 5 CH 3 CH 1
OBSERVATION TIME
DC - 2 MHz 5 MS/s
POWER ANALYZER
POWER
OI
ABORT
ESC
LOCAL key
Press this key to switch from remote
mode to local mode so as to enable
key operation.
MISC key
Press this key to set communication setting.
REMOTE indicator
Lit while remote mode is
active via communications.
Rear Panel
GP-IB connector
Used to connect a controller
(personal computer etc.)
using a GP-IB cable.
For information on how to
connect the GP-IB cable,
refer to the following page.

1-2 IM 253710-11E
1.2 Connecting the GP-IB Cable
GP-IB Cable The GP-IB connector on the side panel of the PZ4000 is a 24-pin connector that
conforms to IEEE Standard 488-1978. Use a GP-IB cable that also conforms to IEEE
Standard 488-1978.
Connection Method
Connect the GP-IB cable as shown below.
Connection Precautions
• Be sure to tighten the screws on the GP-IB cable connector firmly.
• The instrument can be connected to more than one item of equipment (e.g. a personal
computer) if more than one GP-IB cable is used. However, it is not possible to
connect more than 15 items of equipment (including the controller) to a single bus.
• If you connect the instrument to more than one item of equipment, make sure that a
different address is used for each item.
• Each connecting cable must be 2 m or less in length.
• The total length of all the cables must not exceed 20 m.
• While communications are in progress, more than two-thirds of the connected
equipment items must be turned ON.
• When connecting more than one item of equipment, connect them so that the
connection route forms a star or linear configuration. Loop or parallel wiring is not
allowed.
CAUTION
Be sure to switch off power to both your PC and the oscilloscope before
connecting or disconnecting cables. Failure to switch power off may
cause internal circuit failure or improper operation.

Overview of the GP-IB Interface
1-3IM 253710-11E
1
1.3 GP-IB Interface Functions
GP-IB Interface Functions
Listener function
• Allows you to make the settings which you can make using the panel keys on the
instrument, except for the power ON/OFF and GP-IB communications settings.
• Receives commands from a controller requesting output of set-up and waveform data.
Also receives status report commands.
Talker function
• Outputs set-up and waveform data.
Note
The talk-only, listen-only and controller functions are not available on this instrument.
Switching between Remote and Local Modes
When switched from Local to Remote Mode
Remote mode is activated when a REN (Remote Enable) message is received from a
controller while local mode is active.
• REMOTE is displayed on.
• All front panel keys except the LOCAL key can no longer be operated any more.
• Settings entered in local mode are retained.
When switched from Remote to Local Mode
Pressing the LOCAL key in remote mode puts the instrument in local mode. However,
this is not possible if Local Lockout has been set by the controller (page 1-6).
• The REMOTE indicator is turned off.
• All front panel keys are operative.
• Settings entered in remote mode are retained.

1-4 IM 253710-11E
1.4 GP-IB Interface Specifications
GP-IB Interface Specifications
Electrical and mechanical specifications:Conforms to IEEE Standard 488-1978.
Interface functions :Refer to the table below.
Protocol :Conforms to IEEE Standard 488.2-1987.
Code :ISO (ASCII) code
Mode :Addressable mode
Address setting :Addresses 0 to 30 can be selected from the
GP-IB setting screen, displayed when you
press the MISC key.
Remote mode clear :Remote mode can be cleared by pressing the
LOCAL key. However, this is not possible if
Local Lockout has been set by the controller.
Interface functions
Function Subset Name Description
Source handshaking SH1 Full source handshaking capability
Acceptorhandshaking AH1 Fullacceptorhandshakingcapability
Talker T6 Basic talker capability,serialpolling,untalkon
MLA(MyListenAddress), no talk-only
capability
Listener L4 Basiclistener capability,unlistenonMTA(My
TalkAddress),nolisten-onlycapability
Servicerequest SR1 Fullservicerequestcapability
Remotelocal RL1 Fullremote/localcapability
Parallelpoll PP0 Noparallelpollingcapability
Deviceclear DC1 Fulldeviceclearcapability
Devicetrigger DT1 Devicetriggercapability
Controller C0 Nocontrollerfunction
Electricalcharacteristic E1 Opencollector

Overview of the GP-IB Interface
1-5IM 253710-11E
1
1.5 Setting Addressable Mode
Before You Begin When you make settings which can be made using the front panel keys of the instrument
or when you output set-up data or waveform data using the controller, the following
settings must be made.
Setting the address
This function allows you to set the instrument’s address for addressable mode within the
range of 0 to 30. Each item of equipment connected via a GP-IB interface has its own
address, by which it can be identified. Care must be taken to ensure that all
interconnected devices are assigned unique addresses.
Note
Do not change the address while the GP-IB interface is being used by the controller.
Operationg Procedure
1. Press the MISC key.
2. Press the “GP-IB/RS232” soft key.
3. Press the “Comm Device” soft key to select “GPIB.”
4. Turn the jog shuttle to set the desired address.
Step 1, 2 Step 3 Step 4

1-6 IM 253710-11E
1.6 Response to Interface Messages
Response to Interface Messages
Response to a uni-line message
IFC (Interface Clear)
Clears the talker and listener. Stops output if data is being output.
REN (Remote Enable)
Switches between remote and local modes.
IDY (Identify) is not supported.
Response to a multi-line message (address command)
GTL (Go To Local)
Switches to local mode.
SDC (Selected Device Clear)
Clears the program message (command) which is currently being output. Also clears the
output queue (page 4-5).
*OPC and *OPC? will be disabled if they are currently being executed.
*WAI and COMMunicate:WAIT will be stopped immediately.
GET(Group Execute Trigger)
Operates in the sameway as the TRG command.
PPC (Parallel Poll Configure) and TCT (Take Control) are not supported
Response to a multi-line message (universal command)
LLO (Local Lockout)
Invalidates the LOCAL key on the front panel to disable switching to local mode.
DCL (Device Clear)
Same as SDC
SPE (Serial Poll Enable)
Sets the talker function to serial poll mode for all equipment connected to the
communications bus. The controller performs polling on equipment sequentially.
SPD (Serial Poll Disable)
Clears serial poll mode as the talker function for all equipment connected to the
communications bus.
PPU (Parallel Poll Unconfigure) is not supported.
What is an Interface Message?
An interface message is also called an interface command or bus command, and is
issued by the controller. Interface messages are classified as follows.
Uni-line messages
Messages are transferred through a single control line. The following three types of uni-
line message are available.
IFC (Interface Clear)
REN (Remote Enable)
IDY (Identify)

Overview of the GP-IB Interface
1-7IM 253710-11E
1
1.6 Response to Interface Messages
Multi-line message
Eight data lines are used to transmit a message. Multi-line messages are classified as
follows.
Address commands
Valid when the equipment is designated as a listener or a talker. The following five
address commands are available.
Commands valid for equipment designated as a listener
GTL (Go To Local)
SDC (Selected Device Clear)
PPC (Parallel Poll Configure)
GET (Group Execute Trigger)
Command valid for equipment designated as a talker
TCT (Take Control)
Universal commands
Valid for any item of equipment, irrespective of whether the item is designated as a
listener or a talker. The following five universal commands are available.
LLO (Local Lockout)
DCL (Device Clear)
PPU(Parallel Poll Unconfigure)
SPE (Serial Poll Enable)
SPD (Serial Poll Disable)
In addition to the above commands, a listener address, talker address on secondary
command can be sent in an interface message.
Interface Messages
Uni-line
Messages Address
command Universal command
★IFC
★REN
IDY ★GTL
★SDC
PPC
★GET
TCT
★LLO
★DCL
PPU
★SPE
★SPD
Listerner
address Talker address Secondary command
Multi-line Messages
Messages marked with a “★” are interface messages supported by the PZ4000
Note
Differences between SDC and DCL
The SDC command is an address command and requires that both the talker and listener be
designated; however DCL is a universal command and does not require that the talker and
listener be designated. Therefore, SDC is used for particular items of equipment, while DCL can
be used for any equipment connected to the communications bus.

Overview of the Serial Interface
2-1IM 253710-11E
2
Chapter 2 Overview of the Serial Interface
2.1 Names of the Parts and Their Functions
Front Panel
R
E
S
E
T
S
E
L
E
C
T
TRIG’ D
ACQ
REMOTE
MENU
SHIFT
CAL
NULLCOPY
LOCALHELPMISC
FILE
ZOOM
CURSOR MATH
DISPLAY
SETUP INPUT
MEASURE TRIGGER
CONFIGURATION
ELEMENT
VOLTAGE
CURRENT
FILTER
1
FILTERFILTERFILTER
234
SINGLE
START
START/STOP
CH 8 CH 6 CH 4 CH 2
CH 7 CH 5 CH 3 CH 1
OBSERVATION TIME
DC - 2 MHz 5 MS/s
POWER ANALYZER
POWER
OI
ABORT
ESC
LOCAL key
Press this key to switch from remote
mode to local mode so as to enable
key operation.
MISC key
Press this key to set communication setting.
REMOTE indicator
Lit while remote mode is
active via communications.
Rear Panel
Serial (RS-232) connector
Used to connect a controller
(personal computer etc.)
using a serial cable.
For information on how to
connect the serial cable,
refer to section 2.3.

2-2 IM 253710-11E
2.2 Serial Interface Functions and Specifications
Receiving Function
It is possible to make the same settings via the serial interface as can be made using the
front panel keys.
Measured/computed data, panel set-up information and error codes can be received.
Sending Function Measured/computed data can be output.
Panel set-up information and the status byte can be output.
Error codes which have occurred can be output.
Serial Interface Specifications
Electrical characteristics : Complies with EIA-574 Standard (EIA-232 (RS-232) Standard
for 9 pin)
Connection : Point-to-point
Communications : Full-duplex
Synchronization : Start-stop system
Baud rate : 1200, 2400, 4800, 9600, 19200
Start bit : 1 bit (fixed)
Data Length : 7 or 8 bits
Parity : Even, odd or no parity
Stop Bit : 1 or 2 bits
Connector : DELC-J9PAF-13L6 (JAE or equivalent)
Hardware handshaking : User can select whether CA or CB signals will always be True,
or will be used for control.
Software Handshaking : User can select whether to control only transmission or both
transmission and reception using X-on and X-off signals.
X-on (ASCII 11H)
X-off (ASCII 13H)
Receive : 256 bytes
Switching between Remote and Local Modes
when switched from Local to Remote Mode
Remote mode is activated when the “COMMunicate:REMote ON” command is received
form a controller while local mode is active.
• REMOTE is displayed on.
• All front panel keys except the LOCAL key can no longer be operated any more.
• Settings entered in local mode are retained.
When switched from Remote to Local Mode
Pressing the LOCAL key in remote mode puts the instrument in local mode. However,
this is not possible of Local Lockout (when the “COMMunicate:LOCKout ON” command
is received) has been set by the controller (page 1-6).
Local mode is activated when the “COMMunicate:REMote OFF” command regardless of
Local Lockout.
• The REMOTE indicator is turned off.
• All front panel keys are operative.
• Settings entered in remote mode are retained.

Overview of the Serial Interface
2-3IM 253710-11E
2
2.3 Connecting the Serial Interface Cable
When connecting this instrument to a computer, make sure that the handshaking
method, data transmission rate and data format selected for the instrument match those
selected for the computer.
For details, refer to the following pages. Also make sure that the correct interface cable
is used.
Connector and Signal Names
2
1
3
4
5
6
7
8
9
2. RD (Received Data) :Data received from personal computer
Signal direction...Input
3. SD (Send Data) :Data transmitted to a personal computer
Signal direction...Output
5. SG (Signal Ground) :Ground for signals
7. RS (Request to Send):Signal used for handshaking when receiving data from a
personal computer
Signal direction...Output
8. CS (Clear to Send) :Signal used for handshaking when transmitting data to a
personal computer
Signal direction...Input
Pin Nos. 1, 4, 6 and 9 are not used.
9-25 Pin Connector
58723
(2) (3)(4) (5) (7)
The number between brackets refer to the pin Nos. of the 25-pin connector.
Signal Direction The figure below shows the direction of the signals used by the Serial interface.
Computer This
instrument
RS [Request to send]
SD [Send data]
RD [Receive data]
2
3
8
7
CS [Clear to send]

2-4 IM 253710-11E
2.3 Connecting the Serial Interface Cable
Table of Serial Standard Signals and their
Pin No.
(9-pin connector)
Abbreviation
Serial (RS-232) Description CCITT JIS
5
3
2
8
7
AB (GND)
BA (TXD)
BB (RXD)
CB (CTS)
CA (RTS)
102 SG
103
104
106
105
SD
RD
CS
RS
Signal ground
Transmitted data
Request to send
Received data
Clear to send
Signal line connection example
The pin numbers shown are that of 9-pin connectors.
In general, use a cross cable.
SD
RD
RS
CS
SG
SD
RD
RS
SG
• OFF-OFF / XON-XON
PC PZ4000
SD
RD
RS
CS
SG
SD
RD
RS
SG
• XON-RTS(XON-RS)
PC PZ4000
SD
RD
RS
CS
SG
SD
RD
RS
SG
• CTS-RTS(CS-RS)
PC PZ4000
CS CS CS
2
3
8
7
5
2
3
8
7
5
2
3
8
7
5
2
3
8
7
5
2
3
8
7
5
2
3
8
7
5

Overview of the Serial Interface
2-5IM 253710-11E
2
2.4 Handshaking
To use an serial interface for transferring data between this instrument and a computer, it
is necessary to use certain procedures by mutual agreement to ensure the proper
transfer of data. These procedures are called “handshaking.” Various handshaking
systems are available depending on the computer to be used; the same handshaking
system must be used for both the computer and this instrument.
This instrument allows you to choose any handshaking mode from the following four
modes.
Data Sending Control (control
method when sending data to a computer) Data Receiving Control (
control
method when receiving data from a computer)
Software
Handshake Software Handshake
Handshake format Descriptions→
NO-NO
XON-XON
XON-RTS
CTS-RTS
Handshake
Method Sending stops
when X-off is
received, and
sending is
resumed
when X-on is
received.
Sending stops
when CB(CTS) is
False, and
sending is
resumed when CB
is True.
No
handshake No handshake
X-off is sent
when received
data buffer
becomes 3/4-
full, and X-on is
sent when the
received data
buffer is only
1/4-full.
CA (RTS) is set to
False when
received data buffer
is only 3/4-full, and
is set to True when
received data buffer
is only 1/4-full.
Hardware
Handshake Hardware Handshake
OFF-OFF
XON-XON
XON-RS
CS-RS
The menu of
this instrument
1 OFF-OFF • Transmission data control
There is no handshake status between the instrument and host computer. The X-OFF
and X-ON signal from the host computer is processed as data, and the CS signal is
ignored.
• Reception data control
There is no handshake status between the recorder and host computer. When the
recorder reception buffer becomes full, the excess data is discarded. RS = True (fixed)
2 XON-XON • Transmission data control
A software handshake status is established between the instrument and host
computer. The instrument will stop a data transmission when an X-OFF signal is
received from the host computer, and will resume transmission when the next X-ON
signal is received. A CS signal from the host computer is ignored.
• Reception data control
A software handshake status is established between the instrument and host
computer. When the intstruments reception buffer vacancy reaches 64bytes, the X-
OFF signal will be sent to the host computer. When the reception buffer vacancy
reaches 192 bytes, the X-ON signal will be sent. RS = True (fixed)

2-6 IM 253710-11E
2.4 Handshaking
3 XON-RS • Transmission data control
A software handshake status is established between the instrument and host
computer. The instrument will stop a data transmission when an X-OFF signal is
received from the host computer, and will resume transmission when the next X-ON
signal is received. A CS signal from the host computer is ignored.
• Reception data control
A hardware handshake status is established between the instrument and host
computer. When the intstruments reception buffer vacancy reaches 64bytes, an “RS =
False” status will be established. When the reception buffer vacancy reaches 192
bytes, an “RS = True” status will be established.
4 CS-RS • Transmission data control
A software handshake status is established between the instrument and host
computer. The instrument will stop a data transmission if a “CS = False” status is
established, and will resume the transmission shen a “CS = True” status is
established. The X-OFF and X-ON signals from the host computer are processed as
data.
• Reception data control
A hardware handshake status is established between the instrument and host
computer. When the intstruments reception buffer vacancy reaches 64bytes, an “RS =
False” status will be established. When the reception buffer vacancy reaches 192
bytes, an “RS = True” status will be established.
Precautions Regarding Data Receiving Control
When handshaking is used to control the reception of data, data may still be sent from
the computer even if the free space in the receive buffer drops below 64 bytes. In this
case, after the receive buffer becomes full, the excess data will be lost, whether
handshaking is in effect or not. Data storage to the buffer will begin again when there is
free space in the buffer.
256 bytes
Used Free, 64 bytes
When handshaking is in use,
reception of data will stop when the
free space in the buffer drops to 64
bytes since data cannot be passed to
the main program fast enough to
keep up with the transmission.
Used Free, 192 bytes
After reception of data stops, data
continues to be passed to the internal
program. Reception of data starts
again when the free space in the
buffer increases to 192 bytes.
Used
Whether handshaking is in use or not,
if the buffer becomes full, any
additional data received is no longer
stored and is lost.
Data Receiving Control using Handshaking
Note
It is necessary to create a host computer program which prevents the buffers of both the
intrument and the computer from becoming full.

Overview of the Serial Interface
2-7IM 253710-11E
2
2.5 Matching the Data Format
The serial interface of this instrument performs communications using start-stop
synchronization. In start-stop synchronization, one character is transmitted at a time.
Each character consists of a start bit, data bits, a parity bit and a stop bit. Refer to the
figure below.
Data bit
(7 or 8 bits)
1 character
Stop bit
1
1 or 2 bits
2
Parity bit
Even, odd or none
Start bit
Circuit idle state
Level returns to idle
state (dotted line)
until the start bit of
the next item of data
(solid line).

2-8 IM 253710-11E
2.6 Setting up this Instrument
Before You Begin When using the controller to set the items which can be set locally using the keys on the
instrument, or when outputting the setup information or the waveform data to the
controller, set the following items.
Baud rate
Select from the following choices.
1200, 2400, 4800, 9600, 19200
Data format
Select the combination of the data length and the stop bit from the following choices.
8-NO-1, 7-EVEN-1, 7-ODD-1, 7-NO-2
Handshaking method
Select the transmit data control and the receive data control from the following choices.
NO-NO, XON-XON, XON-RTS, CTS-RTS
Terminator
Select from the following choices. The terminator used when sending the data from this
instrument is selected on the menu. Use either “LF” or “CR+LF” for the terminator in
receiving the data.
CR, LF, CR+LF
Operating Procedure
Displaying the Serial (RS-232) menu
1. Press the MISC key.
2. Press the “GP-IB/RS232” soft key.
3. Press the “Comm Device” soft key to select “RS232.”
Selecting the baud rate, the data format and etc.
4. Press the “BaudRate” (baud rate), “Format” (data format), “Rx-Tx” (handshaking
method), and the “Terminator” (terminator) soft keys individually, and set each item.
Step 1, 2 Step 3, 4