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Try the below script in the AT Command Tester tool
//Script: at!dalsrxbw.at //This AT command is used to set the LTE Rx Bandwidth in the Sierra Wireless modems //in the Factory Test Mode. //Enter the password AT!ENTERCND="1234" //Put the modem in to factory modem AT!DAFTMACT WAIT=2 //Set the radio for LTE Band B1 AT!DASBAND=34 WAIT=2 //Set LTE Bandwidth to 1.4 MHz AT!DALSRXBW=0 WAIT=2 //Set LTE Bandwidth to 3 MHz AT!DALSRXBW=1 WAIT=2 //Set LTE Bandwidth to 5 MHz AT!DALSRXBW=2 WAIT=2 //Set LTE Bandwidth to 10 MHz AT!DALSRXBW=3 WAIT=2 //Set LTE Bandwidth to 15 MHz AT!DALSRXBW=4 WAIT=2 //Set LTE Bandwidth to 20 MHz AT!DALSRXBW=5
Output of the above script in the AT Command Tester tool
AT!ENTERCND="1234" OK Password protected commands are unlocked AT!DAFTMACT 290300 OK AT!DASBAND=34 0 OK AT!DALSRXBW=0 OK AT!DALSRXBW=1 OK AT!DALSRXBW=2 OK AT!DALSRXBW=3 OK AT!DALSRXBW=4 OK AT!DALSRXBW=5 OK