DTM test between two nrf51822 chips?

[Husky_xc]

Hi,

In my project, I only have PCBs with nrf51822 chips and do not have a plan to buy a spectrum analyzer yet. But the certification requires me to apply DTM application to my chip and I don't know if I click the button on nrfgo studio is the code actually working or not....Is there any suggestions?

Can I apply DTM application to two PCBs and use one in tx test mode and another in rx test mode? Can I see any number change on nrfgo studio in this way?

Another thing is, I changed TX/RX pin number and compiled from Keil\dtm\direct_test_mode\pca10028\blank\arm5\direct_test_mode_blank_pca10028.uvoptx , then load the this hex file directly to (blank) nrf51822 chip without any softdevice/bootload.

Is that the right way to do?

Thanks

[endnode]

You can easily run DTM between two nRF5x chips/devices. The FW example from SDK doesn't use Soft Device or other stack, it accesses Radio interface directly. If you are sure that your UART PINs match your HW configuration and you are able to convert this UART to be able to plug it to PC (e.g. FTDI RS232 3V3 TTL to USB cable does the job) then simply set-up Python test scripts from Nordic application note and you are done!

[Husky_xc]

Oh, I was looking at the picture Setup with PCB module with SMA connector as Lower Tester in nAN34 Setting up production test using DTM file. So what you mean is I can connect my 2 PCBs to PC using 2 Serial to USB cables. and then run the python script on my pc, without any wired connection between two PCBs? And then just run the python script? Thanks, man!