CIRCUIT DESIGN MU-2-R User manual

OG_MU2-ESP_v10e
OPERATION GUIDE
Embedded low power radio modem MU-2-R
MU2 Evaluation Software Program
MU2-ESP
Operation Guide
Version 1.0 (Mar. 2009)
CIRCUIT DESIGN, INC.,
7557-1 Hotaka, Azumino
Nagano 399-8303 JAPAN
Tel: +81+(0263)-82-1024
Fax: +81+(0263)-82-1016
E-mail: [email protected]
Web site: http://www.cdt21.com

OG_MU2-ESP_v10e 2Circuit Design, Inc.
OPERATION GUIDE
Chapter1MU2-ESP 3
1.1Outline 3
1.2 Terminology 3
1.3 Product Name and Part Number 3
1.4 Operating Environment of the Program 3
1.5 Program Development Language 3
1.6 Program Functions 4
Chapter 2 How to Use the Evaluation Software 5
2.1 Basic Operations 5
2.1.1 Basic operations 5
2.1.2 Hex-decimal conversion form 7
2.2 Control and Test Window 8
2.2.1 Control & Test window 8
2.2.2 ID setting panel 10
2.2.3 Command and transmission panel 10
2.2.4 Transmission data auto assignment panel 11
2.2.5 Set route information panel 11
2.2.6 Route setting panel 12
2.2.7 Key input form 12
2.2.8 Transmission data auto assignment form 13
2.2.9 Binary code transmission form 14
2.2.10 Command issue panel 15
2.2.11 Packet success rate test panel 16
2.2.12 Setting value acquisition panel 17
2.2.13 Other functions panel 18
2.3 Sample Window 20
2.3.1 Electronic bulletin board 20
2.3.2 JPEG image/file transmission 21
2.4 Air Monitoring 23
2.4.1 Air monitor (measurement in a frequency domain) 24
2.4.2 Air monitor (measurement in a time domain) 26
2.4.3 Air monitor mouse functions 27
2.4.4 Cautions when using the air monitor 28
2.5 COM Port Setup Dialogue 29
2.6 Image Viewer 30
2.7 Option Dialogue 31
2.8 Files Created by the Program 32
Contents

OG_MU2-ESP_v10e 3Circuit Design, Inc.
OPERATION GUIDE
The MU-2-R Evaluation Software Program: MU2-ESP is a dedicated program for evaluation of the MU-2-R series of
products. It includes a control window and test window for issuing commands for evaluation purposes, testing
samples, an air monitor function, various test functions and so on. Using the air monitor function during product
development allows you to optimize the equipment. In addition, you can create graphical reports when conducting
field tests.
With the test functions, it is possible to check the field status such as the RSSI level where the equipment is placed,
the packet success rate and so on using a local PC.
Caution: This program cannot control equipment other than the MU-2-R series of products.
This Operation Guide is for the equipment using the MU-2-R 434MHz.
Terminology used in this Operation Guide and the MU-2-R series product Operation Guides may be written as
follows.
1. When referring to products, “MU-2-R” may be used to represent the MU-2-R series of products. This should be
understood as referring to the version you own.
2. The “setup disk” is the CD-ROM that comes with the MU-2-R series kit that is used for setup.
Product name: MU-2-R Evaluation Software Program
Part number: MU2-ESP
Operating system: Windows Vista, XP, 2000
Recommended CPU operating speed: 400 MHz or higher
Recommended display: XGA(1024 x 768 pixels) or higher
Hard disk capacity: 5 MB
Pointing device: Mouse etc.
Some RS232C-USB converters do not work properly due to problems with the virtual COM port driver or for
other reasons. In this case, use a conventional COM port.
Borland Developer Studio 2006 , Delphi
Components used: Naichal: PREPRE electronic signboard component
Maker’s URL: http://www.geocities.jp/nai_777/free/index.htm
Chapter 1 MU2-ESP
1.1 Outline
1.2 Terminology
1.3 Product Name and Part Number
1.4 Operating Environment of the Program
1.5 Program Development Language

OG_MU2-ESP_v10e 4Circuit Design, Inc.
OPERATION GUIDE
The program has windows with the following functions. Read the MU-2-R Operation Guide and the Operation Guide
for the MU-2-R series of products before using the program.
Control and test window
The control and test window is for issuing commands to the MU-2-R, and by checking the responses, understanding
the operation of the MU-2-R. You can check the operation of the 3 modes (command mode, text mode, and binary
mode) provided with the MU-2-R and carry out tests. In addition, you can fix the basic operation parameters in the
EEPROM.
With the test functions, it is possible to check the field status where the equipment is placed, the packet success rate
and the internal setting values, and to change the channels in the system and so on.
Sample window
Sample 1
A sample program for data transmission between PCs using the MU-1 showing the data on the electronic bulletin
board. This is a transmission test using 1 frame (255 bytes). The character string entered in the data input line is
shown in the electronic bulletin board window on the destination PC screen.
Sample 2
Asample program for transmitting image data between PCs using the MU-2-R. This is a transmission test using data
spread over multiple frames (more than 255 bytes). Binary files such as images and the like can be transmitted.
Air monitoring window
A function that uses the RSSI level information acquired from the MU-2-R, monitoring the status of the radio waves
in the field and displaying them as a graph. You can also display the field status of the target station using the relay
function.
With the air monitor function, the status of the radio waves changing from moment to moment can be displayed as a
frequency domain or as a time domain.
You can display the absolute receive level.
You can write the measurement data to a file and read it.
You can print the measurement results.
You can save the measurement results as image data such as extended metafile (EMF), which is useful for
creating reports and the like.
You can scroll and zoom in on the measurement results to analyse them.
You can customise the colours of the graphs and display them in 3D.
1. Monitoring by frequency domain
Since you can measure and display the RSSI level of each channel, you can monitor the status of the radio
waves in the field.
You can hold the peak level of each channel for the period of measurement.
You can display the field status of the target station.
2. Monitoring by time domain
Since you can monitor the field strength (signal level and noise floor level) of the current channel in real time, you
can choose where to locate the radio equipment and assess the status of the antenna. At the source station, you
can specify the channel to measure.
You can carry out continuous measurement and one-shot measurement.
If you carry out measurement while moving the transmitter around, you can assess the relationship between
communication range and receive level.
You can display the field status of the target station.
Image viewer
You can open and view the image files of graphs saved during air monitoring.
You can also copy the images to other applications using the clipboard.
1.6 Program Functions

OG_MU2-ESP_v10e 5Circuit Design, Inc.
OPERATION GUIDE
■2.1.1 Basic operations
The basic operations include selecting the MU-2-R to use, setting the interface, selecting the mode and function
window and so on.
The MU-2-R has 3 operation modes (command, text, and binary).
The transmission test function and air monitor function operate in the command mode. The buttons for these
functions are disabled in modes other than the command mode.
Immediately after opening the COM port and when returning from the air monitoring function to the control and
test window, the program automatically reads and resets the channel and Equipment ID, and these items are
displayed on the control and test window screen. If you perform an unexpected operation, the Equipment ID
may change to ‘FFh’, therefore always check the Equipment ID.
(1) Always close the COM port before connecting the MU-2-R, changing the equipment, turning the power on and
off and so on. If not, not only will the program shut down due to a COM port error, there may be adverse effects
to the operation of the OS.
(2) In the binary mode, characters entered in the input line of the control and test window are sent to the MU-2-R as
they are input.
(3) In order to return from the text mode to the command mode, the program sends the 1-byte ESC code:1Bh.
(4) An RS232C signal DTR line is used for switching between the binary mode, text mode, and command mode.
(5) When carrying out the various tests, check the User ID, Group ID, Equipment ID, Destination ID, transmission
channel and the routing information in the control and test window. In particular, note that when finishing on the
air monitoring function screen, the Equipment ID may be ‘FFh’ unless the power of the MU-2-R is turned off.
2.1 Basic Operations
Note
Chapter 2 How to Use the Evaluation Software

OG_MU2-ESP_v10e 6Circuit Design, Inc.
OPERATION GUIDE
[1] File menu
* Image Viewer: You can check the air monitor images that you save, or copy them to the clipboard.
* Quit: Finishes the program.
[2] Setting menu
* COM Port: Opens the COM port setup window.
* Option: Opens a window for program settings and changing the colour of displays.
[3] Help menu
* Open Help Folder: Opens the folder containing the Help file.
* Version: Opens the version information window.
[4] Time counter start/stop button
Starts and stops time measurement with the time counter
[5] Hex conversion button
Clicking this button opens the hex-decimal conversion form. For details of conversion, refer to the conversion form
item.
[6] Reload button
Reloads the model name to enable measurement with the equipment actually connected to the COM port.
When existing saved air monitor data is opened in the air monitor window, the colour of the button changes to
flashing red when the data is displayed. Clicking the button enables measurement with the equipment that is
actually connected.
[7] DSR indicator
An indicator that displays the status of the COM port DSR signal. On when the level is High.
[8] CTS indicator
An indicator that displays the status of the COM port CTS signal. On when the level is High.
[9] DTR indicator
An indicator that displays the status of the COM port DTR signal. On when the level is High.
The DTR signal is connected to the MODE terminal of the MU-2-R via the RS232C transceiver.
Since the MU-2-R is normally used in the command mode, the DTR indicator is off. It turns on when changing to
the binary mode or text mode.
[10] COM port indicator
On when the COM port is opened.
[11] Minimize button
[12] Maximize button (do not use this)
[13] Close Program button
Closes the program.
[14] Model type designation box
Specifies the MU-2-R to use.
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OG_MU2-ESP_v10e 7Circuit Design, Inc.
OPERATION GUIDE
[15] COM port button
Opens and closes the COM port.
If commands and so on are not sent normally when you click the “Trans.1” and “Trans.2” buttons, click the COM
port button again.
[16] COM port Set button
Displays the COM port setup dialogue. Enter the same communication parameters as for the MU-2-R.
[17] Air monitor window button
[18] Sample window button
[19] Control and test window button
[20] Text mode button
Sets the MU-2-R to the text mode.
[21] Command mode button
Sets the MU-2-R to the command mode. Normally you should use this mode.
[22] Binary mode button
Sets the MU-2-R to the binary mode.
[23] Time counter
A time measurement counter. This is stopped with a left mouse click.
■2.1.2 Hex-decimal conversion form
Converts hexadecimal numbers to decimals, and vice versa. The numerical values that can be converted are from
0h to FFFFFFFh for hexadecimals, and 0 to 268435455 for decimals. After double clicking the value, enter a
numerical value to make the setting. It is not possible to enter a binary number.
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[1] Hexadecimal number input
[2] Decimal number input
[3] Binary display
Shows the setting value as a binary number.

OG_MU2-ESP_v10e 8Circuit Design, Inc.
OPERATION GUIDE
You can perform the following tasks from the control and test window.
1. Issue a variety of commands, 2. Fix the parameters in the EEPROM, 3. Packet success rate test, 4. Change the
system channels, 5. Issue continuous test data, 6. Check the MU-2-R internal setting values of each station, 7.
Other tasks.
■2.2.1 Control & test window
Data input lines
In the command mode you can issue commands to the MU-2-R from the data input line 1 and data input line 2.
In the text mode, enter a character string to transmit to the data input line and click the “Trans.” button or push the
“Enter” key. In the binary mode, characters entered in the input line are transmitted to the MU-2-R as soon as the
key is released.
In the text mode and binary mode, make the size of data sent at one time less than 255 bytes.
Screen
The screen displays the commands and data sent from the data input lines and displays the command response and
receive response returned from the MU-2-R.
You can copy character strings selected on the screen to the clipboard. However, commands cannot be issued, nor
can data be edited, printed or saved from the screen.
You can check the number of characters displayed on the screen with the “Screen data counter”.
Caution: Note that the screen is cleared automatically if the amount of data reaches 30,000 bytes.
Issuing commands
The data transmission command ‘@DT’ requires data and the size of the data. You can easily make the basic ‘@DT'
command using the transmission data auto assignment panel. Attach the route information to the basic command
with the “Attach to ｌine1” button on the Set route information panel. You can also enter the route information
directly.
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2.2 Control and Test Window

OG_MU2-ESP_v10e 9Circuit Design, Inc.
OPERATION GUIDE
[1] Screen
Displays commands issued to the MU-2-R, and command responses and receive responses from the MU-2-R.
* The data displayed cannot be edited, saved, printed or copied, although character strings can be copied to the
clipboard.
[2] Screen scroll button
Scrolls the screen.
[3] Clear screen/F7 button
Clears the screen. The F7 function key has the same function.
[4] Extend function button
Opens and closes the extend function panel for the packet success rate test, internal setting value check and so
on.
[5] Set route information panel
You can write the route information set with the route setting panel in the route register or attach it to the data
transmit command. For details, refer to the page of ‘Set route information panel’.
[6] Status bar
Indicates the status of various items during operation.
[7] Route setting panel
You can set route information using only the mouse. For details, refer to the page of route setting panel.
[8] Transmission data auto assignment panel
You can automatically make the template data transmit command (@DT) using this panel. The transmission data
assigned is shown in the data input line 1.
The format of the data transmit command is different depending on whether the relay function is used or the
Destination ID is used.
In other words, there are three methods; sending in accordance with the content of the Destination ID or the
content of the route register, and directly entering the information in the command.
You can also request an ACK response. For details, refer to the page of ‘Transmission data auto assignment
panel’.
[9] Command and data transmission panel
You can transmit the commands and data entered in the data input lines. It is convenient to use the data input line
1 for the data transmit command and the data input line 2 for other commands. Clicking the binary code button
opens a form to send binary code. For details, refer to the page of ‘Command and data transmission panel’.
[10] Link ID setting panel
You can issue the commands to change the channel and frequently used IDs such as the Equipment ID with only
a mouse click. For details, refer to the page of ‘Link ID setting panel’.
[11] Screen mode panel
Switches between screen display modes.
This displaysASCII characters when set to “Text”. It displays control code as garbled characters.
It displays hexadecimal code from 00h to FFh when set to “Hex”.
[12] Display code button
Abutton for checking the character code. While this button is pressed, the characters appearing on the screen are
displayed as hexadecimal code.
[13] Screen line counter
The number of lines on the screen.
[14] Screen data counter
Shows the amount of data displayed on the screen. Note that the screen is cleared automatically if the amount of
data exceeds 30,000 bytes.

OG_MU2-ESP_v10e 10 Circuit Design, Inc.
OPERATION GUIDE
■2.2.2 ID setting panel
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[1] Link ID check button
Clicking this button issues link related commands, making it possible to check the internal setting values.
[2] Channel, [3] Group ID, [4] Equipment ID, [5] Destination ID
You can change the link related IDs without writing the commands.
■2.2.3 Command and data transmission panel
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[1] Data input line 1 counter
Indicates the amount of data (single byte) entered in the data input line 1.
[2] Data input line 1
Enter commands or data, and press the Enter key or click the “Trans.1” button to send the data to the MU-2-R.
Mainly used to enter the data transmit commands. The content is cleared with a double mouse click.
In the command mode: Enter commands.
In the text mode and binary mode: Enter transmission data.
[3] Clear data input line 1 button
Clears the content of the data input line 1. The SHIFT+F8 function key has the same function.
[4] Transmit 1 button
Transmits the content of the data input line 1 to the MU-2-R. The F8 function key has the same function.
If commands and so on are not sent normally when you click the “Trans. 1” button, click the COM port button
again.
[5] Transmit 2 button
Transmits the content of the data input line 2 to the MU-2-R. The F9 function key has the same function.
If commands and so on are not sent normally when you click the “Trans. 2” button, click the COM port button
again.
[6] Clear data input line 2 button
Clears the content of the data input line 2. The SHIFT+F9 function key has the same function.
[7] Data input line 2
Enter commands or data, and press the Enter key or click the “Trans. 2” button to send the data to the MU-2-R.
The content is cleared with a double mouse click.
In the command mode: Enter commands.
In the text mode and binary mode: Enter transmission data.
[8]Binary code transmission button
Opens a binary code transmission form to send binary codes. For details, refer to the explanation of the binary
code transmission form.

OG_MU2-ESP_v10e 11 Circuit Design, Inc.
OPERATION GUIDE
■2.2.4 Transmission data auto assignment panel
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[1] Transmit command selector
Selects one of the transmit commands the MU-2-R has. The data transmit command 1 uses a format where the
transmit command refer to the Destination ID before sending data. With the data transmit command 1, the relay
function can not be used nor can theACK response be returned.
The data transmit command 3 attaches the RSSI level of the receive signal to the response returned.
[2] Route reference
Determines the way to make the transmit command reference the route information.
[3] Refer to route register
Checking this item and clicking the “Assign” button [5] makes the transmit command reference the content of the
route register before being sent. The DT command option character is ‘/R’.
[4] Directly enter route information
Checking this item and clicking the “Assign” button [5] attaches the route information set with the route setting
panel to the transmit command.
[5] Transmission data assignment button
Clicking this button opens the transmission data auto assignment form. The assigned data is displayed in the data
input line 1.
[6] Use ACK response checkbox
Uses a format where the transmit command requires an ACK response from the target station when a data packet
is transmitted. The DT command option character is ‘/A’.
■2.2.5 Set route information panel 1
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[1] Set to route register button
Writes route information set with the route setting panel in the route register. Transmission is based on the content
of the route register and does not depend on the Destination ID.
[2] Disable route register button
Disables the route register (set to NA). Clears the content of the route register and ensures that data is transmitted
based on the Destination ID.
[3] Attach to the data input line 1 button
You can attach the route information set with the route setting panel to the command entered in the data input line
1.

OG_MU2-ESP_v10e 12 Circuit Design, Inc.
OPERATION GUIDE
■2.2.6 Route setting panel
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[1] Route information
The route information set. The character string shown here may be used as the route information in various
cases.
[2] Number of relay stations
This is the number of relay stations specified.
[3] Target station
Specifies the equipment number of the station to which data will be sent. Clicking this opens a key input form for
entering the equipment number.
[4] Relay stations
Enter the equipment numbers of the relay stations. The equipment numbers are shown in hexadecimal.
Clicking them opens a key input form for entering the equipment number.
When specifying multiple relay stations, start from the left side.
[5] Source station
Specify the equipment number of the station from which data will be sent.
Clicking this displays the equipment number currently set in the MU-2-R.
■2.2.7 Key input form
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[1] Decimal value
Shows the value set as a decimal.
[2] Hexadecimal value
Shows the value set as a hexadecimal.
[3] Mode
Select whether to input the value as a decimal or hexadecimal. With decimal input theA to F keys cannot be used.
[4] Clear button
Clears the value entered.

OG_MU2-ESP_v10e 13 Circuit Design, Inc.
OPERATION GUIDE
■2.2.8 Transmission data auto assignment form
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[1] Character setting (random characters)
Generates a template character string for the data transmit command with a length specified with data size [4].
Characters are selected randomly.
[2] Character setting (same characters)
Generates a template character string for the data transmit command with a length specified with data size [4].
The characters are selected with the character selector [6].
[3] OK button
Confirms the character string for data transmission. The created data is displayed in the data input line 1.
[4] Data size
Specifies the data size. The range that can be specified is 0 to 255 bytes.
[5] Data size indicator
Indicates the data size as a decimal and a hexadecimal.
[6] Character selection
Selects the characters for the data transmit command. Data between 0 to 255 can be created, however the control
code is not shown. When sending a control code, it is possible to set the screen mode of the target station to Hex
and check the code.
[7] Character display
The characters and codes for the transmit command.
[8] Transmission character display
Shows the character sequence for the transmit command.

OG_MU2-ESP_v10e 14 Circuit Design, Inc.
OPERATION GUIDE
■2.2.9 Binary code transmission form
Generally communication programs can not directly transmit binary codes (hexadecimal data from 00h to FFh). By
using this form, it is possible to insert binary codes including control codes into the data transmit command of the
MU-2-R and transmit it. You can also issue the commands other than the data transmit commands, which can be
used as reference when you create a control program for the MU-2-R. The status of transmission can be checked on
the control and test window screen.
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[1] Clear all cells button
Clears all contents in the transmission data cells [12].
[2] Clear cell button
Clears the content in the active cell of the transmission data cells [12].
[3] Store characters cell
You can store frequently used characters in these cells. The stored character is set in the active cell of the
transmit data cells [12] with a left mouse click. To store characters in these cells, press a right mouse button on the
cell and enter a character from the keyboard.
[4] ASCII code list
[5]Transmit data button
Transmits the command assigned in the transmission data cells [12].
[6]Close button
Closes this window.
[7] Input mode
Select whether to input the value as a decimal or hexadecimal.
[8] Hexadecimal key
Assigns byte data to set in the transmission data cells [12].
[9] Hex: hexadecimal value display
Shows the byte data set as a hexadecimal.
[10] Decimal: Decimal value display
Shows the byte data set as a decimal.
[11] Data size
Displays the size of the data set in the transmission data cells [12].
[12] Transmission data cells
Assigns transmission data in each cell. In the command mode, creating data using commands other than those
specifically for the MU-2-R will result in errors. The created data will be sent by clicking the transmit data button.
[13][14] ←/→buttons
Shifts the active cell of the transmission data cells [12] to right and left. You can also directly select the cell with a
mouse click.

OG_MU2-ESP_v10e 15 Circuit Design, Inc.
OPERATION GUIDE
■2.2.10 Command issue panel
On this panel it is possible to check and set the internal settings of the various parameters. To set the parameters,
attach the setting parameter to the command displayed in the data input line 2 and press the transmission button.
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[1] Button for switching to the command issue panel
[2] Button for switching to the packet success rate test panel
[3] Button for switching to the setting value acquisition panel
[4] Button for switching to the other functions panel
[5] Other
[6] Mode
[7] Link parameter
You can issue the communication link related commands and check the internal states. Pressing the “Get link
parameter” button acquires multiple parameters. Pressing the “Link parameter Ini.” button initializes the link
parameters on the work memory. The content of the EEPROM will be retained.
[8] Serial parameter
You can issue the serial communication related commands and check the internal states.
[9] Issue RSSI related parameter
You can issue the RSSI related commands and check the parameters.
[10] Reset the source station [11] Reset the target station
Resets the source station and target station to the same status as when the power is turned on.
[12] Initialize the source station
Clicking this button returns the source station to the factory default values. Note that the content of the EEPROM
is also rewritten.
[13] Help
Help for the command issue panel.

OG_MU2-ESP_v10e 16 Circuit Design, Inc.
OPERATION GUIDE
■2.2.11 Packet success rate test panel
The packet test command ‘@CP’ is used for calculating the packet success rate. Packets sent from the source
station are returned without modification from the target station, which is displayed as the success rate for one-way.
[1] Received parts
Calculates the packet success rate based on the number of packets that succeeded.
[2] Received packet counter
The number of packets received.
[3] Packet success rate indicator
Shows the packet success rate calculated with one-way communication.
[4] Sent parts
Transmits packets for calculating the packet success rate using the ‘@CP’ command.
[5] Current number sent
Shows the current value of packets being sent.
[6] Number of packets setting (3)
Sets the number of packets to send. To improve the accuracy of success rate measurement, it is necessary to set
100 or more.
[7] Start/stop button (4)
Starts and stops measurement of success rate.
[8] Transmission text setting button (1)
Opens the transmission data assignment form used for calculating the packet success rate. It is possible to
specify characters and data size.
[9] Time interval
For the packet success rate test, the sent data being returned is used. For this reason, it is necessary to take into
consideration the timing by which packets are forwarded according to the number of relay stations. The time
shown here is actually used in the test and acquired by pressing the Get interval button [11]. The acquired value is
adjustable. This time interval is Interval actual time displayed in [10] with 500 ms added.
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OG_MU2-ESP_v10e 17 Circuit Design, Inc.
OPERATION GUIDE
[10] Interval actual time
The time until all sent packet data returns.
[11] Get interval button (2)
By clicking this button you can acquire the packet transmission timing of the current system.
[12] Reset button
Reset if the interval cannot be acquired. Check the settings of the relay stations and so on.
[13] Help
Help for the packet success rate test method of measurement.
■2.2.12 Setting value acquisition panel
On the setting value acquisition panel it is possible to acquire the internal setting values of the source station, relay
station, and target station units. Before acquiring the settings, specify the route information on the route setting panel.
If the route information is not set, the setting of the Destination ID will be acquired.
[1] Display area for internal setting values
Acquires and shows the various parameters of the MU-2-R units.
[2] Source station part
The source station internal setting values field.
[3] Target station part
The target station internal setting values field.
[4] Internal setting values
The display area for internal setting values. Clicking this displays the content in a cursor pop up.
[5] Button for acquiring source station values
Acquires the source station internal setting values.
[6] Button for acquiring target station values
Acquires the target station internal setting values.
[7] Clear all button
Clears the internal setting values display area.
[8] Help
Help for acquiring internal setting values.
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OG_MU2-ESP_v10e 18 Circuit Design, Inc.
OPERATION GUIDE
■2.2.13 Other functions panel
On this panel it is possible to change the channels within the system and transmit test data.
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[1] Channel changing panel
It is possible to change the channels of MU-2-R units in the system at the same time. Before changing the
channels, set the routing information on the route setting panel. This function is not guaranteed to change the
channels without fail. Exercise prudence when changing channels. For example, if changing channels fails when
changing all channels at the same time, first check which stations you can communicate with, then set the route
information again and change the channels.
[2] Changed channel
Sets the channel to change.
[3] Fix in EEPROM
Check this to fix the changed channel in the EEPROM.
[4] Route test button
Tests whether the current system is linked normally before changing the channels.
[5] Result
Shows the result of the route test. If the route is normal, the channel changing buttons are enabled for 3 seconds
only. Change the channels within this time.
[6] Button for changing all station channels
Changes the channels of all stations in the system.
[7] Button for changing the target station channel
Changes the channel of the target station.
[8] Button for changing the source station channel
Changes the channel of the source station.
[9] Help
Help for the other functions panel.
[10] Start/stop button
Starts/stops transmission of the command string.
[11] Interval setting
Approximate transmission time t with the standard protocol can be calculated using the following formula in
accordance with the number of transmission characters;
t=2.08ms*n+100ms

OG_MU2-ESP_v10e 19 Circuit Design, Inc.
OPERATION GUIDE
[12] Number of transmitted packets
Shows the number of packets transmitted
[13] Continuous command transmission panel
By pressing the ‘Start’ button, the command character string entered in the data input line 1 is continuously
transmitted for the time specified with the ‘Interval’.
[14] Issue target station test data
Pressing this button issues test data from the target station specified with the route information on the route
setting panel for only the time specified.
[15] Issue source station test data
Pressing this button issues test data from the source station for only the time specified.
[16] Start/stop button
[17] Set data button
[18] Packet transmission interval
[19] Number of packets
[20] Transmission of packets with serial numbers
You can assign a serial number to each of packets to send. The serial number is a hexadecimal integer. The
transmission time 't' with standard protocols can be calculated depending on the number of transmission
characters 'n' as follows;
t=2.08ms*n+100ms
Set the transmission data using the "Set data" button [13]. 8 characters are used for a serial number, therefore
ensure that the number of transmission characters is less than 247.
[21] Time for issuing test data
Specifies the time for issuing test data in 10-second units.
[22] Test data transmission panel
Transmits test data from the source station or target station for the time specified.

OG_MU2-ESP_v10e 20 Circuit Design, Inc.
OPERATION GUIDE
■ 2.3.1 Electronic bulletin board
The electronic bulletin board sample is a one-way communication sample, with only one transmission packet of up
to 255 bytes of data.
Before transmitting data, set the route information on the route setting panel.
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[1] Button for switching to the electronic bulletin board panel
[2] Button for switching to the JPEG image/file transmission panel
[3] Character speed control
Controls the speed at which characters are shown on the transmitting display. A higher value makes the display
slower.
This is the speed at which characters are shown on the receiving display of the target station.
[4] Data setting button
The character string shown in the data input line is shown on the transmitting display in the colour of the button.
[5] Transmit/F9 button
The character string shown in the transmitting display is transmitted from the MU-2-R. Transmission is also
possible with the F9 function key.
[6] Clear data input line button (F8)
[7] Transmission data template A template for transmission data.
[8] Data input line
Enter transmission data. Pressing the Enter key displays it in the transmitting display. You can input data.
[9] Transmission indicator Displayed in red when data is being transmitted.
[10] Transmitting display Displays the transmission data.
[11] Clear transmitting display button (F7)
[12] Receiving indicator Shown in green when data is being received.
[13] Receiving display Displays the receiving data.
[14] Clear receiving display button (F6)
2.3 Sample Window