Supports RS-232C, RS-422/485, and TTL without expansion board

Compact Protocol Analyzer



A high cost-performance model
designed for ASYNC communication

Max Speed 500Kbps
Capture memory 32MB, Max 16GB SD card or USB flash
Analysis timing troubles
lack of signal voltage
760g, A5-size, battery driven 7 hours
Wi-Fi remote control (supported only in Japan, USA, Canada, and EU)

LE-1500R : Japanese model ( contains Japanese manual )
LE-1500R-E : World wide model ( contains English manual )

"LE-1500R" is a protocol analyzer (line monitor) dedicated for asynchronous communication monitoring with affordable pricing. LE-1500R can run as a stand- alone by the internal battery for long time and can be remotely controled by a PC or a smart phone via Wi-Fi (Wi-Fi function is available only in USA, Canada, Japan, and EU). The analyzer has a TTL measurement port (which supports UART communication) as its standard port besides RS-232C, RS-422, and RS-485. It can monitor communication data of max 500Kbps for up to 32MB (8,000,000 data) in real time and also can execute a simulation testing of send/receive data. It also has a BERT function (which is not equipped with the analyzers of this pricing level) as its standard function. The correct time stamp, the measurement of idel time (which are the difficult for other software analyzers), and the capturing ability (without missing data) are the best options for trouble shooting and development test of a communication sytem which requires a reliablity.

TTL measurement is available without using an option

< TTL connection example >

The analyzer has a measurement port for TTL (1.8V - 5V range) as its standard feature. You can monitor/test a UART interface of LAN/Wi-Fi/sensor modules, AD converter IC, or memory IC without exchanging the measurement board.

<TTL measurement port>

The pin header connecter of 2.54mm pitch
equivalent to HIF3FC-10PA-2.54DS(71)(HIROSE ELECTRIC CO., LTD.)
TTL line: UART measurement terminal
TRG line: external trigger input, PWR terminal
* The PWR terminal outputs the voltage of selected signal level (1.8/2.5/3.3/5V).

< 5 wires TTL prove cable (optional) >
The cable can be used for both TTL communication signal and the external trigger signal. You need 2 cables to use the both at the same time.

< Interface setting display >

Measure at Arbitrary Speed

< Baud rate setting display >

Able to have a measurement test of high-speed communications up to 500Kbps (half duplex and full duplex). Using high precision DPLL technology for open baud rate support, transmission and reception speeds can be separately set to an effective 4 digits

Support RS-232C/RS-422/RS-485 and TTL as Standard Feature

Supports various interfaces as a standard feature

The analyzer has RS-232C, RS-422/RS-485, and TTL as its standard interface. RS-422/RS-485 connector of the analyzer is removable terminal.

< Protocol setting display >
< Interface setting display >
The RS-422/485 interface has detachable terminal block.
You can directly connect the RS-422/485 cable to the terminal of analyzer. When you temporalily remove the analyzer from the target line, you do not need to screw off the cable as the terminal can be detached.
The expansion kit supports Carrent Loop communication
Different interfaces are supported by simply changing the measurement boards.

Simply pull out the interface board from the measurement unit and replace it with an expansion board for another protocol.


Auto Save... Long Recording Time

Saving the captured data to
USB flash or SD card
External memory
up to 16GB
Supports optional SD card
(such as SD-16GX) or USB flash
The auto save function makes it possible to continuously save up to 8Gbyte. It automatically saves the content of the capture memory on a high capacity compact flash (CF) card. And it continuously saves data into the measurement log of a user-specified file size, using ring recording as long as the card has space. In addition, it is useful for identifying communication failures which occur at rare intervals.
Target Line Speed 
Continuous Recording Time Reference*1
Main memory Only When Using 32GB external memory*2
9600bps Approx. 3.5hrs. Approx. 40days.
115.2Kbps Approx. 18min. Approx. 3days.
1Mbps Approx. 140sec. Approx. 10hrs.
*1: Calculated for full-duplex transmission of 1,000 byte data frames per sec. Both transmission and reception data consume 4 byte of memory with each capture.
*2: When using SD-16GX or 16GB USB flash memory.

Logic Analyzer Analysis And Signal Voltage Measurement

Communication line timing is analyzed and displayed as a logic analyzer display to a time resolution of max. 50ns. The new function of signal voltage measurement ensures ease of the voltage measurement of RS-232C signals and voltage swing of TTL in places where tester probes cannot reach smoothly.
<Example of logic analyzer measurement >
Example of logic analyzer measurement
<Example of signal voltage measurement>
Example of signal voltage measurement

PC Link

Measurement data can be used on your PC with the light edition of the PC link software attached to the analyzer, or by using free text conversion software or print data acquisition software. The PC link software supports USB connection and Wi-Fi connection (Wi-Fi function is supported only in Japan, USA, Canada, and EU), and remote measurement is possible by connecting multiple analyzers at the same time. It also supports display of measurement data saved in a memory card or USB memory, data conversion, etc.

Note: The light edition of LE-PC300R limits it monitoring time for 10 minutes and the number of files of text conversion (at the same time) up to 3. The full edition of the PC link software "LE-PC300R" (available as an optional product) does not have these limitations.

Beside real-time data transfer, external memory devices are also available.



Multiple connection by Wi-Fi (supported only in Japan, USA, Canada, and EU)


Wi-Fi connection is available via accesspoint or direct connection. (supported only in Japan, USA, Canada, and EU)

Online Monitoring

< Example of connection for online monitoring >

The online monitor function, like a sniffer, records telegrams in the capture memory and provides an easy-to-understand display for the type of protocol, without affecting the communications line. The analyzer records not only communications data but the time (time stamp) of transmissions and receptions as well as idle time. Therefore, failure time and timeout status can be checked.
The trigger function detects the specific conditions and you can select bit transfer sequence and polarity, depending on the test.

< Raw Data >

< PPP Translation Display >

< PPP Data Display >

< Timing Display >

Display special data items in
   individual signs.

Uncommon data status in the communication line is expressed in individual signs.

Block check OK
Block check NG
Parity error
Framing error
Parity and Framing Error

Line State LED

communications line state is indicated in real time using 2-color LEDs

Time Stamp Measurement
Record the data and the time of transmission / reception for data frames. ASYNC cannot recognize the length of frame. Thus, our analyzers decide the frame end when it finds the specific character, or when it passes the specific time of being non-communication. Time stamp will be displayed in above 2 situations.
* Specifies OFF, day / hour / minute, hour / minute / second, or minute / second / 10msec.
Non-communication state which works as the frame end detection time of ASYNC and Burst communications can be set from 1 to 100ms.
* If there are some frame with same time stamp, it is because the analyzer measured the frames in 10ms.

Idle Time Measurement
The amount of idle time between communications frames can be measured.
* Specifies OFF or a resolution of 100msec., 10msec. or 1msec.

Trigger Function
The trigger feature allows you to specify a communications event as the trigger condition and have measurement operations executed automatically when that condition is specified. Up to four pairs of conditions and operations can be set, which is helpful towards identifying frequent intermittent faults that occurs with communications systems. And, the operation of a trigger condition can be specified as the condition for another trigger, making it possible to analyze complicated operations based on sequential trigger.

Trigger Condition Communication error (Parity, MP, framing, BCC, break, abort, short frame can be specified individually.), communication data string up to 8 characters (don't care and bit mask available), idle time more than the specified duration, match time/counter value, logic status of interface signal line and external trigger input
Trigger Action Stops measurement/test (offset can be set), validates trigger condition controls timer (start/stop/restart), controls counter (count/clear), activates buzzer, saves monitor data on a memory card, sends the specified character string (during manual simulation), and sends pulse to external trigger terminal OT2.
<Trigger setup summary display>
Trigger setup summary display

<Trigger condition setup>

Trigger condition setup

<Trigger action setup>

Trigger action setup

Monitor Condition Auto Setting

The analyzers can analyze communications data and automatically set basic measuring conditions, such as communications speed, character framing, data code, BCC/FCS, etc. This is effective for monitoring lines of unknown communications conditions.

* The auto setting is not accurate with small volumes of communications data or data that contains many errors.
< Search display >
< Determination display >

Delay Time Measurement
A feature to measure the voltage of four RS-232C signal lines has been added to the conventional delay time function used to analyze the delay time of control line changes (e.g., RTS to CTS changes) at a resolution of 0.1ms. <Delay time measurement>
Delay time measurement


With the simulation feature, the the analyzer acts as the counterpart to the target device and performs transmission and reception tests according to protocol. Even in the early stages of development when matching devices are not available, tests can be run at near to actual operating status. MANUAL mode checks the communications protocol step by step.
Communications speed can be freely set. Therefore, margins can be evaluated by intentionally shifting communications speed, and error response processing can be checked using test data that mixes in data with parity errors.
< Control lines and data transmission timing >
Example of connection
   for simulation
< Transmission table setup display >

The manual mode allows you to send the data registered in the transmission table which corresponds to the "0" to the "F" keys. The data can be set with one press of a key. While checking replies from a unit under development with the monitoring feature, you can easily and simply test the communications process. You can also send fixed data by registering it under a key combination of the SHIFT and "0" to "D" keys, as well as turn RTS/CTS and DTR/DCD signal lines on/off with the SHIFT and "E"/"F" key combinations.

< Flow control test setup display >

Flow control can be simulated on the transmission and reception-lines using X-on/off flow control or the control line handshake. In the transmission mode, up to 16 cycles of data from transmission start until a generated interrupt request can be displayed. In the reception mode, you can set the number of received data cycles until a transmission interrupt request is generated, as well as the time until the transmission resume request is generated.

< ECHO mode setup display >

In the echo mode, the analyzer internally return received data. Buffer echo to send back data by a reception frame, character echo to send back data by a character and loop back echo that simply loops back data can be selected. It is used to test display terminals and communications terminals.

BERT(Bit Error Rate Test)

BERT support enables you to measure transmission quality of communications lines by a loop-back or interactive connection. It is possible to measure evaluation parameters (bit error count, block error count) conforming to ITU-T G.821 Notification, hence enabling bit error rate evaluations and fault point identification. Elaborate test patterns and functions such as bit error forced interrupt are comparable to dedicated equipment.

< BERT setting display >

Evaluation is possible in ASYNC mode, by specifying measurement period (continuous, number of received bits, duration, repeating) or test pattern.

<BERT measurement display>

Once the measurement is started, the results of measured line quality are displayed and updated in real time. Furthermore, repeat mode measures the bit error rate for a specified period of time for the communication line.
Example connection for BERT
BERT Measurement Content
Communication mode ASYNC mode.
Test Pattern
CONTINUE : Continuous measurement
R-BIT : Continues the test until the number of effective received bits exceeds the designated value.
RUN TIME : Continues the test until the measurement time exceeds the designated value.
Pattern 26-1, 29-1, 211-1, MARK, SPACE, ALT, DBL-ALT, 1in4, 1in8, 1in16, 3in24
Measured Data
Savail Available measurement in seconds 0 to 9999999
R-Bit Effective bits received 0 to 9999999 to 9.99E9
E-bit Error bit count 0 to 9999999 to 9.99E9
Bit-ER Bit error rate 0 to 9.99E-9 to 1
E-Sec Error in seconds 0 to 9999
Loss SYNC loss count 0 to 999
R-Blk Effective blocks received 0 to 9999999 to 9.99E9
E-Blk Block error count 0 to 9999999 to 9.99E9
Blk-ER Block error rate 0 to 9.99E-9 to 1
%E.F.S Normal operation rate 0.000 to 100.000%

Menu-Based Simple Operation

< Top menu display >

Anyone can easily operate the analyzer owing to the easy menu selection system handed down from earlier models.

Offline Analysis and Data Searches
Search Key Communications error (individual error type can be specified), communications data string of max. 8 characters (DON'T CARE and bit mask can also be specified), idle time beyond a specified duration, specific time stamp (DON'T CARE can also be specified), external trigger matching data
Search Operation Find and display, counting

Measurement data displays can be freely scrolled and paged. A powerful search feature allows you to locate specific data and perform counting.

< Search key setting >
Using "DON'T CARE (*)," you can search for time stamp data from 10:30:00 to 10:39:59 as in this example.
PC Compatible File Management Specification

Test conditions and results such as measured data can be saved on optional CF cards in the file management format compatible with your PC. Of course, files can be interchangeably used between models. Therefore, measurement data can be saved on-site with LE-1500, and analyzed or manipulated in greater detail using LE-3500 back in the office.

*: The LE-8200A, LE-8200, LE-3500, LE-2500, LE-1500, LE-7200, LE-3200, LE-2200, and LE-1200 are compatible in measurement data file.
Part of files or data saved in higher hierarchy models or new models, however, may not be available in lower hierarchy models or conventional models.


< File operation display >

Types, names, sizes and the data/time of files saved in the memory card can be checked.

File type Measurement data (.DT), Trigger save data (TG SAVEnn. DT),
Auto save data (#nnnnnnn. DDT), Measurement Conditions (.SU), Transmission data for simulation (.ST), Simulation Program (.SP)
File operation Displaying normal file or designated type of files, Save, Load, Deletion, Format


< File filter setup >

When many files have been saved, the file filter feature allows you to specify the type of file to be displayed.

This is set to display data betwen 0:00 on August 1, 2008 and 23:59 on August 31, 2008.
Updating to Firmware

You can download the latest version of software from our website to take advantage of the latest functions and features. -> Download

Auto RUN/STOP for Unmanned Measurement
< Auto run display >

By setting time and a data of measurement start and end, measurement can be done automatically during the specified time period.

Various Print Formats

Measurement data of a user-specified range can be printed out continuously from any printer. And, with a dedicated printer, you can print hard copy images of computer displays and continuous images of logic analyzer waveforms.

*=[LE-1500R]====[2017-03-07 15:18:29]=*
* Model     : LE-1500R                *
* Version   : 1.00                    *
* Extension : Standard                *
* Serial No.: XXXXXXXX                *
* Start time: 2013-03-07 15:17:29     *
* Stop time : 2013-03-07 15:17:31     *
* MONITOR DATA                        *
*  PROTOCOL: ASYNC                    *
*  S-SPEED : 9600    R-SPEED : 9600   *
*  CODE    : ASCII   CHAR BIT: 8      *
*  PARITY  : NONE    STOP BIT: 1      *
*  BCC     : NONE                     *
*                 PRINT CODE : ASCII  *

SD:[ IDLE ][ TMSP ]52435252430D[ TMSP ] - - - - - -[ IDLE ]
   [ 0664 ][322868] R C R R CCR[322869]            [ 0051 ]
RD:                 - - - - - -        0D0A4F4B0D0A
                                       CRLF O KCRLF

SD:[ TMSP ]52435252430D[ TMSP ] - - - - - -[ IDLE ][ TMSP ]
   [322920] R C R R CCR[322921]            [ 0071 ][322993]
RD:         - - - - - -        0D0A4F4B0D0A
                               CRLF O KCRLF

SD:52435252430D[ TMSP ] - - - - - -[ IDLE ][ TMSP ]52435355
    R C R R CCR[322994]            [ 0063 ][323058] R C S U
RD: - - - - - -        0D0A4F4B0D0A                 - - - -
                       CRLF O KCRLF

SD:430D[ TMSP ] - - - - - -[ IDLE ][ TMSP ]52435355430D[ TM
    CCR[323059]            [ 0041 ][323100] R C S U CCR[323
RD: - -        0D0A4F4B0D0A                 - - - - - -
               CRLF O KCRLF

SD:SP ] - - - - - -[ IDLE ][ TMSP ]52434155430D[ TMSP ] - -
   101]            [ 0046 ][323148] R C A U CCR[323149]
RD:    0D0A4F4B0D0A                 - - - - - -        0D0A
       CRLF O KCRLF                                    CRLF

SD: - - - -[ IDLE ]
           [ 0132 ]
*=[LE-1500R]====[2017-03-07 15:38:16]=*
* Model     : LE-1500R                *
* Version   : 1.00                    *
* Extension : Standard                *
* Serial No.: XXXXXXXX                *
* Start time: 2013-03-07 15:37:53     *
* Stop time : 2013-03-07 15:38:03     *
*  PROTOCOL: ASYNC                    *
*  S-SPEED : 9600    R-SPEED : 9600   *
*  CODE    : ASCII   CHAR BIT: 8      *
*  PARITY  : NONE    STOP BIT: 1      *
*  BCC     : LRC E                    *
*                 PRINT CODE : ASCII  *

SD:    [ TMSP ]02303132333435363738394142434445464748494A4B
       [375945]SX 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K
RD:             - - - - - - - - - - - - - - - - - - - - - -


SD:4C4D4E4F505152535455565758595A0319            [ TMSP ]02
    L M N O P Q R S T U V W X Y ZEX{}            [380152]SX
RD: - - - - - - - - - - - - - - - - -                     -


    0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R
RD: - - - - - - - - - - - - - - - - - - - - - - - - - - - -


    S T U V W X Y ZEX{}
RD: - - - - - - - - - -

*=[LE-1500R]====[2017-03-07 15:18:29]=*
* Model     : LE-1500R                *
* Version   : 1.00                    *
* Extension : Standard                *
* Serial No.: XXXXXXXX                *
* Start time: 2013-03-07 15:17:29     *
* Stop time : 2013-03-07 15:17:31     *
*  PROTOCOL: PPP                      *
*  S-SPEED : 57600   R-SPEED : 57600  *
*  CODE    : HEX     FCS     : FCS16  *

SD:580943 LCP      CONF-REQ   0  G 00320206000000000506289B6DD2070208020D030611
RD:580982 LCP      CONF-REQ   1  G 0020010405F40206000000000305C223050702080213
RD:580984 LCP      CONF-REJ   0  G 000B0D03061104064E
SD:580984 LCP      CONF-ACK   1  G 0020010405F40206000000000305C223050702080213
SD:580985 LCP      CONF-REQ   1  G 002B0206000000000506289B6DD20702080213170143
RD:580998 LCP      CONF-ACK   1  G 002B0206000000000506289B6DD20702080213170143
RD:580999 CHAP     CONF-REQ   1  G 0021107D1A3C2B864ADCE51A19A8B4C44C1E9A6E6173
SD:580999 LCP      IDENT      2  G 0012289B6DD24D5352415356352E3030
SD:581000 LCP      IDENT      3  G 001E289B6DD24D535241532D312D4550534F4E5F4544
SD:581000 CHAP     CONF-ACK   1  G 00341084B08E8379CF63E95DB30B06FE74295C706C75
RD:581033 CHAP     CONF-NAK   1  G 000500
RD:581033 IPCP     CONF-REQ   1  G 00100206002D0F010306D299F828
SD:581033 CCP      CONF-REQ   4  G 000A120600000001
SD:581033 IPCP     CONF-REQ   5  G 00280206002D0F010306000000008106000000008206
SD:581034 IPCP     CONF-ACK   1  G 00100206002D0F010306D299F828
RD:581046 LCP      PROT-REJ   2  G 001080FD0104000A120600000001
RD:581047 IPCP     CONF-REJ   5  G 0010820600000000840600000000
SD:581047 IPCP     CONF-REQ   6  G 001C0206002D0F010306000000008106000000008306
RD:581057 IPCP     CONF-NAK   6  G 00160306D28B420D8106CAEF71128306CAEF711A
SD:581058 IPCP     CONF-REQ   7  G 001C0206002D0F010306D28B420D8106CAEF71128306
RD:581069 IPCP     CONF-ACK   7  G 001C0206002D0F010306D28B420D8106CAEF71128306
SD:581083 IP       (45)       0  G 01480725000080111DE8D28B420DFFFFFFFF00440043
SD:581482 IP       (45)       0  G 01480726000080111DE7D28B420DFFFFFFFF00440043
SD:582369 IP       (45)       0  G 003B072700008011E2F0D28B420DCAEF711204D20035
RD:582385 IP       (45)       0  G 009CF4154000F7113EA0CAEF7112D28B420D003504D2
SD:582389 IP       (45)       0  G 0030072840008006CBCDD28B420DCF2E440B04D30050
RD:582403 IP       (45)       0  G 0030C64C4000370655A9CF2E440BD28B420D005004D3
SD:582404 VJUTCPIP (45)       0  G 0028072A40008000CBD3D28B420DCF2E440B04D30050
SD:582405 VJCTCPIP (70)       0  G 28ED02474554202F20485454502F312E310D0A416363
RD:582430 VJUTCPIP (45)       0  G 0028C79240003700546BCF2E440BD28B420D005004D3
RD:582431 VJCTCPIP (30)      22  G 4004485454502F312E312033303220466F756E640D0A
SD:582437 IP       (45)       0  G 0028072D40008006CBD0D28B420DCF2E440B04D30050
SD:582440 IP       (45)       0  G 0030072E40008006CBC7D28B420DCF2E440B04D40050
RD:582452 VJCTCPIP (2C)      56  G F401000153000130
RD:582452 IP       (45)       0  G 0028C8C7400037065336CF2E440BD28B420D005004D3
SD:582453 VJCTCPIP (6E)       0  G 5B5D00FEAD00015400012204
RD:582454 IP       (45)       0  G 0030C8FB4000370652FACF2E440BD28B420D005004D4
SD:582455 VJUTCPIP (45)       0  G 0028073140008001CBCCD28B420DCF2E440B04D40050
SD:582457 VJCTCPIP (70)       1  G C75B02474554202F686F6D652E61726D782048545450
RD:582478 VJUTCPIP (45)       0  G 0028CA6A400037015193CF2E440BD28B420D005004D4
RD:582481 VJCTCPIP (20)      66  G DA0B485454502F312E3120323030204F4B0D0A536572
RD:582507 VJCTCPIP RES-REP   62  G 7E656C6C70616464696E673D2230223E3C74723E3C74
SD:582522 VJCTCPIP (4C)       1  G 346C0005B400012A
RD:582536 VJCTCPIP (2F)     144  G E90002A26173733D22666F726D223E3C666F726D206E
SD:582552 VJCTCPIP (44)       1  G 2EB80005B4
RD:582561 VJCTCPIP RES-REP  249  G DE697374223E3C6120687265663D2231352E61333637
SD:582572 VJCTCPIP (64)       1  G 2
*=[LE-1500R]====[2017-03-07 16:16:51]=*
* Model     : LE-1500R                *
* Version   : 1.00                    *
* Extension : Standard                *
* Serial No.: XXXXXXXX                *
* Start time: 2013-03-07 16:16:04     *
* Stop time : 2013-03-07 16:16:36     *
* BERT RESULTS                        *
*  PROTOCOL: ASYNC                    *
*  S-SPEED : 9600    R-SPEED : 9600   *
*  CHAR BIT: 8       STOP BIT: 1      *

03/07 16:00       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:01       0  460768       5 1.09E-5       1 1.37E-4       1  98.305
03/07 16:02       0  460768       5 1.09E-5       1 1.37E-4       1  98.305
03/07 16:03       0  460800       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:04       0  460800       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:05       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:06       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:07       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:08       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:09       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:10       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:11       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:12       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:13       0  460776       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:14       0  460768       0 0.00E+0       0 0.00E+0       0 100.000
03/07 16:15       0  460768      70 1.52E-4      15 2.05E-3       4  93.220
03/07 16:16       0  240096       0 0.00E+0       0 0.00E+0       0 100.000