How to perform a loopback test to test a serial communication system using Tera Term, With or without a Lantronix box
Topic
- Loopback test with Tera Term to test a serial communication system.
Environment
- Product: Galaxy, Galaxy Pro
- Component: Lantronix box, Serial communication equipment
- Control System:
Steps
- Install
Teraterm 4.60.zip (Save file to desktop then install)
Loopback - No Lantronix Box
- Open Tera Term and select the Serial radio button.
- Select the appropriate COM port from the drop down box and then press OK.
- The default Baud Rate of 9600 and other COM port settings can be used for loopbacks (Baud Rate of 19200 is used to see incoming RTD data).
- With the loopback in place (RX & TX jumpers), type some characters into to Tera Term and see if you can see what you type; if you can, the loopback is passing (good signal up to that point).
Loopback with Lantronix Box
- Open Tera Term and select the TCP/IP radio button
- Type in the correct IP address (default IP for Daktronics' Lantronix boxes is 172.16.192.24)
- Select Other from the Service selection categories
- Type in the TCP port # (3001 should normally be used) and the press OK (the Protocol shouldn't need to be specified)
- With the loopback in place, type some characters into to Tera Term and see if you can see what you type; if you can, the loopback is passing (good signal up to that point)
- Need to jumper pins 2 (TX) and 3 (RX) on 25 pin plug/RS232 output of Lantronix box. As you look at pins they number right to left 1-13 on top,14-25 on bottom of plug.
Related Resources
The type of serial of communication you are using will determine where you test. Below are some helpful articles for different types of communication.- Hardwired RS232 Serial - How to perform a loopback test on a RS232 system
- Serial Radios -Galaxy: How do I perform loopback testing on a Galaxy display using Gen 2 serial radio system? .
- RS422 Signal converter output -Galaxy: How do I perform a loopback test on the signal converter in a RS-422 Communication Setup? .
- Serial Fiber - How do I perform a loopback test on serial fiber communication without a fiber optic splicer?
- DB9 and DB25 Serial Cable Pinout -What wires are shorted on a serial cable for loopback testing?
KB ID: 000026413
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