EM9191 FW Update and Calibration

IoT Modules MC/EM Series
1

Hello together,

I updated my EM9191 device from Firmware SWIX55C_01.07.19.00_GENERIC_016.010_002 to SWIX55C_03.04.03.00_GENERIC_030.012_000. Before that I was able to establish an TDD (n78) connection towards an AMARI callbox (cellular test device) but not to any FDD band. After the FW-Update an FDD connection could be established but in the end there was no data exchange through a performed iperf run. The formally easily to establish TDD connection was than no longer feasible.
Is there a necessity to ajust calibration data with each new firmware, or where can be the root causes of such behavior.
Every hint is welcome. :slight_smile:
Thank you all very much in advance.

Greetings Felix

2

have you checked AT!RFCOMBOS? or AT!BAND=? and see if this band is available?

3

Hello,
the bands are available and the callbox is providing a 5G stand alone network with only one transmitted band (either band n5, n7 or n78).

4

from product technical specification, n78 should be TDD band

Have you tried some newer FW?

5

well with the old FW n78 TDD is working properly but with the newest available version on the web resources I can get an connection with band n7 FDD but no actual data traffic. A registration of the modem with band n78 was not possible with the newer FW

6

you mean you have tried “SWIX55C_03.09.06.00”?

7

Oh, I did not realize that there is already a version 03.09.06. Thanks for the hint.
But back to my second question. Is there anything regarding calibration when updating a modem. We got some feedback from a customer that this was sometimes necessary for older modems. Not necessarily from Sierra Wireless but also for other modem suppliers.

8

AT!BAND=? will show only the bands calibrated.

9

ok, thanks for your help :slight_smile:
I think that can help us with our customer communication.