LTE-A EG18 locking bands for Carrier Aggregation

IoT Modules LTE-A Module
1

Thu, Oct 27 • 00:10

issues locking bands LT18

Hi,

I have issues locking bands for the carrier aggregation on my LT18.

I can’t lock this two bands B2+B66.
It seems to be two version for this modem probably for two specific regions, Modems that come with specific region can’t not be unlock for all bands?. I travel worldwide, so I need that to work with all global bands possible.

So I need a little help with the last part of the AT commands.

This is what I got when I type the command:

AT+QCFG=“band”

+QCFG: “band”,0x8d0,0x1a0080800d5,0x0

OK

I have issues changing the bands with those HEX values.

Technically

Band B2 is HEX 2

Band B66 is HEX 20000000000000000

I am not sure if the correct value for the carrer aggregation of both of this bands will be type like this: 220000000000000000

?

Should I type ?

AT+QCFG="band"0x8d0,0x220000000000000000,0x0

What options should I try?

Hope you can help me out here.

Thank you,
Voloff

2

Correct.

Quectels use 128-bit bandmasks. So you need a mask with bits 2 and 66 set.

You get that by doing a bitor of those two values. Hex addition also works, and gives the same result (as long as there are no duplicated values).

So:

AT+QCFG="band",8D0,20000000000000002

Note that the hex identifier “0x” is invalid syntax when used in the set version of the command.

3

So maybe this is the right one all correct type no spaces B2+B66 :

AT+QCFG=“band”,8D0,20000000000000002,0

4

Nope this is not working to me, maybe I have to unblock the bands first?

5

Earlier, you gave your LTE bandmask as 0x1a0080800d5

I take it this is the default bandmask for your EG18.

If so, this is an EG18-EA, meant for the markets EMEA, APAC and Brazil.

LTE bandmask 0x1a0080800d5 decodes as the band list 1 3 5 7 8 20 28 38 40 41.

You should not be trying to enable band 2 or 66 on this modem. It is the wrong variant for that.

6

well It was the whole point of this, when I bought this modem I been advertised it was global