Reset issue when linking CMW270 with DTM

Question

hi 
 We are conducting SIG certification testing with nRF52832 and DFM. 
 (CMW270) 
 
 The TX test was completed normally. 
 However, a problem occurred in the RX test. 
 The problem with the RX test is that if you try to change channels, the nRF52832 resets. 
 
 * composition 
 CMW270 ---- (USB port) ----- CP2102 PCB (USB to uart, 5V power source ) --------(UART, DC 5V)-------- nRF52832 PCB ----- (SMA) ------ spectrum analyzer 
 . 
 * Estimating the cause of the problem 1) DC 5V power drop delivered to USB port? (But the TX test has been completed... so the probability seems low) 
 2) RX buffer size insufficient? 
 
 . 
 Is there anything to review? 
 . 
 . 
 Additionally, when running DTM in nRF Connect for Desktop, both TX/RX operate normally. 
 nRF Connect for Desktop does not allow settings below "Receive Period = 30ms"... 
 Are these settings necessary in the actual CMW270?

thank

ovrebekk · Accepted Answer

Hi 
 Could you try to enable logging in the direct_test_mode firmware (over RTT), and see if you get some crash log when the issue occurs? 
 Then it should be easier to investigate what the root cause is. 
 If you do, please include the log in the case so I can have a look at it. 
 Best regards Torbjørn

ovrebekk · Answer

Hi 
 My bad, I now realize there is no logging support in the direct_test_mode example, so it makes sense that it wouldn't work. 
 SHMoon said: Are there any settings that need to be adjusted on the device that sends data packets externally via SMA? 
 By SMA I assume you mean the J1 connector on the DK? 
 If you connect a cable to this connector the antenna signal should be switched automatically, to go to the connector rather than the DK antenna, so no configuration should be needed. 
 Best regards Torbjørn

Reset issue when linking CMW270 with DTM

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