# MC7304 problem with LTE Tx test mode

**URL:** <https://forum.sierrawireless.com/t/mc7304-problem-with-lte-tx-test-mode/7751>\
**Category:** MC/EM Series\
**Created:** [February 10, 2015, 4:41pm UTC](https://forum.sierrawireless.com/t/mc7304-problem-with-lte-tx-test-mode/7751 "2015-02-10T16:41:03Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![hurodrig](https://avatars.discourse-cdn.com/v4/letter/h/8dc957/32.png) [@hurodrig](https://forum.sierrawireless.com/u/hurodrig)\
**Post date:** [February 10, 2015, 4:41pm UTC](https://forum.sierrawireless.com/t/mc7304-problem-with-lte-tx-test-mode/7751/1 "2015-02-10T16:41:03Z")

</div>

Hello Guys,

I am trying to test a MC7304 modem and I just discover that when I try to configure LTE BAND by using AT!DASBAND command, I received “0” as an answer from the modem , this behavior is not normal compared with other testing mode (like wcdma or gsm). For my understanding, answer must be the band itself after you press “enter” twice and not 0 , could you please help me to understand if I am missing something?  
Thank you in advance.

WCDMA TX 2100 configuration:

AT+CFUN=1  
OK  
AT!ENTERCND=“A710”  
OK  
AT!DAFTMACT  
290300

OK  
AT!DASBAND=12 \<— WCDMA BAND  
12 \<— MODEM ANSWER

OK  
AT!DASCHAN=661  
661

OK

LTE TX 2100 configuration:

AT+CFUN=1  
OK  
AT!ENTERCND=“A710”  
OK  
AT!DAFTMACT  
290300

OK  
AT!DASBAND=34 \<------ LTE BAND  
0 \<------ MODEM ANSWER

OK  
AT!DALSTXBW=5  
OK  
AT!DALSRXBW=5  
OK  
AT!DASCHAN=18300  
18176

OK

---

<div class="post-metadata">

**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [February 12, 2015, 2:09pm UTC](https://forum.sierrawireless.com/t/mc7304-problem-with-lte-tx-test-mode/7751/2 "2015-02-12T14:09:33Z")

</div>

hi,  
It is recommended to do a soft reset by giving AT!RESET after AT!DAFTMDEACT to ensure modem exiting FTM mode reliably.  
So between two test sequence , be sure to run AT!RESET to reset properly the device after the AT!DAFTMDEACT

thanks,  
Alex

---

<div class="post-metadata">

**Author:** ![rmagana](https://avatars.discourse-cdn.com/v4/letter/r/bbe5ce/32.png) [@rmagana](https://forum.sierrawireless.com/u/rmagana)\
**Post date:** [March 24, 2015, 10:25pm UTC](https://forum.sierrawireless.com/t/mc7304-problem-with-lte-tx-test-mode/7751/3 "2015-03-24T22:25:25Z")

</div>

Hi Alex,

“It is recommended to do a soft reset by giving AT!RESET after AT!DAFTMDEACT to ensure modem exiting FTM mode reliably.  
So between two test sequence , be sure to run AT!RESET to reset properly the device after the AT!DAFTMDEACT”

I have the same issue but I with AT!DAFTMACT, as per the original question.

Please share if AT!DAFTMACT is used instead of AT!DAFTMDEACT.

Thank you in advance.