Multi Protocol Analyzer


●Supports RS-232C, RS-530, RS-422 / RS-485, and TTL just by one unit.
●Supports legacy interfaces such as V.35, X.20 / 21, RS-449.
●Program simulation function that enables flexible communication tests
●Bit error rate test function for transmission quality analysis
●Reproduces and outputs a timing waveform data acquired by the logic analyzer function
●Time stamp that allows time synchronization by GNSS (PPS) signal
●Automatically records communication logs to large-capacity external storage via USB3.0
●Newly designed lightweight housing with 7-inch color LCD with touch panel
●Saves measurement reports in snapshot or text format
●PC link by LAN, USB, or Wi-Fi (XR only) connection

LE-8500X-RT    No Wi-Fi connection
LE-8500XR-RT  With Wi-Fi connection

The LE-8500X-RT/LE-8500XR-RT is a multi-protocol analyzer that can measure and test RS-232C, RS-530, RS-422/RS-485 and TTL level serial communication as a single unit. It can be widely used for the development and maintenance of serial interfaces of PC peripherals and FA devices, UART, SPI, I2C, etc. of embedded boards by using the monitor function, communication simulation function, bit error rate function, etc. according to the test situation. The model is equipped with a 7-inch wide-color LCD with a touch panel, thus you can check the measurement data immediately on-site without using a personal computer. You can log the data to a USB flash memory etc. via USB 3.0, thus you can analyze the data in detail after the measurement.
In addition, as the time stamps that are time-corrected with high accuracy by GNSS signals can be added to the monitor data by using an optional GPS antenna, by checking the time stamps you can compare and analyze the data measured simultaneously at two points for a long period of time to investigate a communication failure.
Furthermore, by replacing the standard measurement board with a LAN measurement board (sold separately), it can also be used for Ethernet networks. With just one unit, it can be used for many years from PC peripherals and embedded devices to communication fields where reliability is important, such as railways, aviation, and various production lines.

  To be released in October 2022.

Supports RS-232C, RS-530, RS-422 / RS-485, and TTL just by one unit.

top menu display

Equipped with four measurement interfaces that cover a wide range of serial communications. As the DSUB measurement port can switch between RS-232C and RS-530, this device can be used for maintenance of equipment with legacy interfaces such as V.35 and X.20 / 21 without replacing the measurement board.

: Dedicated optional cables are available for monitoring of interfaces such as V.35 and X.20/21.

Various monitor displays

You can select a wide variety of online monitor display formats according to the protocol.

Supports fieldbus protocols Modbus and PROFIBUS as standard

Replaceable measurement board

By replacing the measurement board with the SB-GE2 measurement board (sold separately), it can be used as a LAN analyzer equivalent to LE-8500X.

[ Expansion kit for Gbit LAN communication "SB-GE2" ]

Supports high-speed serial communication as standard

It can monitor communication data without data loss even for a 20Mbps high-speed SPI transmission monitor or a 10Mbps CC-Link test without special firmware.

Supports any communication speed

Any communication speed from 50bps to 20Mbps can be set with 4 significant digits. The bit configuration, bit transmission order, polarity, modulation format, etc. can be freely set to meet various test situations.

Timestamp which can be time-synchronized by GNSS (PPS) signal

In the case of a time stamp of a crystal oscillator with ±20ppm accuracy in general, there may have a time rag up to 1.7 seconds a day. By using the GNSS/GPS time synchronization function, accurate time stamps corrected in seconds can be added to the monitor data. Thus even when you monitor by using two analyzers two different points simultaneously where communication failures rarely occur while a long period of time, you can compare and verify the measurement data of two units based on the time stamp.

GPS antenna connection image

Timestamp and idle time

You can record a real-time time stamp (date/time/minute/second/minute/second, etc.) or an elapsed time/time stamp (minimum 1usec) from the start of measurement for each communication frame received. In addition, non-communication time can be recorded as idle time (100usec unit, etc.).

Simulation function that enables flexible communication tests

The simulation function provides a transmission/reception test environment according to the development phase by making the analyzer act as a communication partner. There are many test modes that are indispensable when the communication partner device cannot be prepared in the early stages of development.

Transmission data table

The transmission data used for the test can be registered in advance in HEX, or typed on the full keyboard screen. You can use the function to register only the specified data as a parity error and automatically calculate CRC and BCC.

SD/RD side distribution function for half-duplex communication data

During a half-duplex communication test that uses only the SD line like RS-485, the test can be performed while the transmission data of the analyzer is distributed to the SD side and the response data from the other device is distributed to the RD side for real-time monitor recording.

Driver control during RS-485 half-duplex communication test

During simulation, the output of the RS-485 driver IC can be linked to data transmission, always active, or the timing can be controlled by the program mode.


Arbitrary data registered in the transmission table corresponding to each key is transmitted each time the key is pressed, and the response of the other device is manually tested step by step while checking the response on the screen.


The data on the transmitting side or the receiving side captured in the memory by the monitor function is transmitted as it is as simulation data.

FLOW mode

You can test making the deveice as the sender or receiver of X-on/off and RTS/CTS flow control for ASYNC communication.

ECHO mode

The received data is looped back inside the unit and transmitted .


You can simulate the slave side or master side in the polling communication procedure of multi-drop (1:N connection).


By creating a program with a dedicated command, you can flexibly simulate a communication protocol that involves condition judgment.


In this mode, you can edit the timing waveform data of the communication line measured by the logic analyzer function on the screen and transmit it. You can reproduce and test communication data with slightly different timings.

BERT (Bit Error Late Test) function useful for transmission quality analysis

This device can send a transmission test pattern, evaluate the returned data with parameters (number of bit errors, number of block errors) conforming to the ITU-T G.821 recommendation, and measure the error rate and isolate the failure point.

BERT image

Reproduces and outputs a timing waveform data acquired by logic analyzer function

This device has the logic analyzer function with a maximum sampling of 100MHz. You can check the signal timing at the 10n second level. The reception timing data measured by the logic analyzer function can be edited and output by the simulation function.

Automatically record communication logs to large-capacity external storage via USB3.0

[ USB storage connection image ]
USB storage connection image

While recording the measurement data in the capture memory, this unit can automatically save them as a communication log file of the specified size continuously for a long time into external storage such as USB memory or SSD. The auto-saved communication log file (# nnnnnnn.DT: n is a serial number in the order of saving) can be divided into multiple files of the specified size and saved, so from the time stamp of the file in the time zone when the communication failure occurred you can narrow down the communication logs of it by checking the their time stamp.

Newly designed battery-powered lightweight housing - ideal for on-site measurement

Carrying image

Uses a new battery-powered housing that weighs less than 1 kg, B5 size. The measurement data can be displayed directly on the 7-inch wide-color LCD, and all measurement tests can be performed without using a PC. Not only can you execute setting operations and smooth data scroll display by touching the screen or swiping, but you can also operate with key switches as with the conventional model so that you can operate even at the site where you need to wear gloves. This product is ideal for on-site measurement at customer sites where the carry-on of a PC is restricted.

Save measurement reports in snapshot or text format

The display screen of measurement results and setting conditions can be screenshotted with a simple key operation. In addition, the measurement data can be saved as a text file that can be displayed on a computer, etc., which is useful for creating a report of test results.

File management function

File management function It has the file management function that allows you to save, read, and delete measurement data, setting data, and screen shots in external storage such as a USB memory or SDHC card. Screenshots (and text data) can be viewed on the analyzer.

Transfer measurement data to PC via Ethernet, USB, or Wi-Fi (XR only) connection

High-speed data transfer via G-bit Ethernet or USB 3.0 is supported for remote connection and data transfer to a PC. The Wi-Fi compatible model LE-8500XR-RT can connect to a PC via Wi-Fi.