Port

Connect your KXPA100 via a KXUSB USB to Serial Adapter to your personal computer. Plug the 3.5mm TRS plug into the labeled RS-232 (PC) on the KXPA100 Amplifier's back panel.

Port tab image

Serial Port

Choose the serial port that is connected to your KXPA100. Click the down arrow to show the list of available serial ports and then select the port you have connected to your KXPA100. See Finding the appropriate port for a USB to Serial Adapter if you're using a USB to Serial Adapter and are not sure which port to choose.

Refresh Port List

Click to update the list of available serial ports, which may be helpful if you plug in a USB to Serial Adapter after the program has started.

Test Communications

Reopens the serial port and verifies that the KXPA Utility can communicate with your KXPA100 and determine its RS-232 speed.

If you change the RS-232 speed using the KXPA Utility Command Tester, use this button to allow the KXPA Utility to discover the new speed.

If the KXPA100 is turned on and the serial connection is operating, it should respond to Test Communications with an "Information" dialog indicating that the KXPA100 is running the "Main" program.

If the KXPA100 is in a "Boot Loader" state, the KXPA100 should respond to Test Communications with a "Warning" dialog.

A KXPA100 in its boot loader, modems, null modem cables, and defective serial cables can echo whatever is sent to them. The KXPA Utility cannot tell what device is attached without sending a block of firmware. If firmware load fails on the first block (address x800), it is very likely that the communications cable is not correctly attached to your KXPA100, the cable is defective, or the wrong serial port has been chosen.