[Sticky] MPXtool - How to install it  

Alex Hartman
Admin Admin

MPXtool software is pretty straightforward to install and use with the RTL dongle. Here's an installation howto:

Note: Do NOT insert the RTL dongle into your PC yet! We need specialized drivers to make it work!

Step 1: Download the latest Zadig from  https://zadig.akeo.ie/ and install.

Step 2: Once Zadig is installed, insert your RTL dongle into your PC, and run Zadig.

Step 3: In Zadig, go to the Options menu and select "List all devices". This will populate the drop down with the proper device. You will see a bunch of stuff in there, maybe your mouse, sound card, etc. We are interested in the one that says either "RTL2838UHIDIR" or "BULK DEVICE #1 (Built-in)". If you have more than 1 bulk device listed, the second one could be the IR sensor on the RTL, we always want #1. 

Step 4: Once your device is selected, the driver section should say something like "RTL2838UUSB(vxx.xxx.x)" and the selected driver should be WinUSB(vx.xx.xxxx). Click "Replace Driver". Zadig will then replace the driver and say "Installed Successfully".

Now our RTL dongle is set up properly to work with MPXtool.


Installing MPXtool:

Step 1: Download the installer from the link emailed to you for the latest version. 

Step 2: Run the installer as you would with any other program.

Step 3: Run the MPXtool config app on the window that popped up in front of you. 

Step 4: Set your audio input/output devices up so you can hear what's going on. Typically you will want to use "Kernel Streaming" and whatever your sound card is. Typically on laptops it will be a "Realtek HD Audio" or "Intel HD Audio Codec". Go to menu, exit.

Step 5: Run MPXtool!


Software only versions of MPXtool have no remote control capabilities, so it will only run as an app on your PC. It also does not have any RF recording capabilities, and can tune only 2.4Mhz of spectrum at a time. It can only demod 1 station at a time as well. But all the tools are there. The Bandscope (of 2.4Mhz), the oscilloscope, the RTA, etc. The RTL itself is not a great RF front-end, as such, it cannot be used to make "certified" measurements, as it's noise floor is much too high, and is susceptible to front-end overload. Overload is noted by the SNR and I/Q meters turning red. To correct this, turn down the gain slider on the demod page until you have a good signal. 


Posted : 26/12/2018 12:15 pm


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