Hi,
Our partner has performed measurements on the 5GHz bands. Unusual artefacts were observed. While testing against the IEEE802.11n specification, it failed. On the picture below, we can observe a dip in the middle of band 60.
Same observation were made on band 62 and 64.
Then, our partner checked band 60 against IEEE802.11n, the result was a fail. The dip was too consequent and the spectrum was too round.
On my side, I couldn't observe the dip. But I performed the measurement on another device with most probably another SW and other settings. I'm not equipped to test against IEEE802.11n. I suspect that it has something to do with the setting of WL1837MOD.
Did you already observe such behaviors? What are your recommendations?
Thanks for helping.
The following commands were used (for band 60):
#Start of PLT Mode
#Deactivate radio communication ; Set chip in PLT Mode (Production Line Testing Mode)
ifconfig wlan0 down
calibrator wlan0 plt power_mode on
#Continuous TX config & start
calibrator wlan0 wl18xx_plt tune_channel 60 1 1
calibrator wlan0 wl18xx_plt set_tx_power 20000 0 1 60 0 1 0 1 0 0 0 0
calibrator wlan0 wl18xx_plt start_tx 400 12 3000 0 0 1 0 0 00:11:22:33:44:55 01:02:03:04:05:06 0
#Stop Continuous TX
calibrator wlan0 wl18xx_plt stop_tx
#Shutdown PLT Mode
calibrator wlan0 plt power_mode off
