We are certifying our device at KIWA. they are testing the WLAN adaptivity and the test is failing. Here is the failure description:
"It was a struggle to perform the WLAN adaptivity testing, it looks like the device is not adaptive when the RF Test Mode software is used, and in normal operating mode the device does not reach the >30% duty cycle required to easily test the adaptivity."
|
DC in max DC Evaluation Window |
Limit Max |
Result |
Length of max DC Evaluation Window |
Start of max DC Evaluation Window |
Stop of max DC Evaluation Window |
|
% |
% |
|
ms |
ms |
ms |
|
18.072 |
10.000 |
FAIL |
50.000 |
95273.076 |
95323.076 |
This test is peformed using the WLAN adaptivity firmware: WiFi_Radio_Test_RTT_Shell.hex and using the instructions from the nordic page:
the following commands are used to initiate the test:
wifi_radio_test init 1 -> init command sets the channel, so init 1 sets it to channel 1 which is in the 2.4 GHz wlan band. The Nordic page is written for 5 GHz adaptivity testing, so they use channel 100 in the 5 GHz wlan band.
wifi_radio_test tx_pkt_tput_mode 0 -> sets it to legacy mode, 802.11b
wifi_radio_test tx_pkt_rate 1 -> Sets data rate 1 Mbps, the lowest data rate possible for WLAN
wifi_radio_test tx_pkt_len 1000 -> packet length 1000 bytes
wifi_radio_test tx 1 -> start test
there is no "wifi_radio_test tx_pkt_gap 0" command -> this is the interval between TX packets in microseconds. The minimum for 2.4 GHz wlan is 200. This is the default setting for the test mode and thus unchanged
there is no uart:~$ wifi_radio_test tx_pkt_num -1 command -> this is the command for number of packets to transmit; The default value is -1 (infinite) so this was also unchanged
Please assist in finding the root cause for failing this critical test for certifying our board.
-> what hardware related root causes are there?
-> Nordic mention a test setup on the page. Does nordic have this test setup available? What part numbers does nordic recommand for building this test setup?
-> does Nordic has a test setup for this test and are you able to test our samples?