EM20 Antenna Connection and commands?

[srunyon1]

On the EM20 there are 4 Connections
M M1 M2 and D/G

if only running two antenna's which should I use?

Is there any benefit of running 3 ? or does it have to be 2 or 4?

Is there a command to see the signal strength of each antenna?

My old Sierra modem had a nice status comannd that showed that info.

these commands I found do not work for me
Modem Status
AT+qnetdevstatus
AT+QNETDEVSTATUS
AT+QCAINFO < CA Info
they all error out.

I found a list of commands here someplace and copied them to a notepad, but can't find the link here again.

any help would be great.

thanks
Ziggy
Top

[GeraldJ]

On the EM20 there are 4 Connections
M M1 M2 and D/G

if only running two antenna's which should I use?

Is there any benefit of running 3 ? or does it have to be 2 or 4?

Is there a command to see the signal strength of each antenna?

My old Sierra modem had a nice status comannd that showed that info.

these commands I found do not work for me
Modem Status
AT+qnetdevstatus
AT+QNETDEVSTATUS
AT+QCAINFO < CA Info
they all error out.

I found a list of commands here someplace and copied them to a notepad, but can't find the link here again.

any help would be great.

thanks
Ziggy
Top

I’m pretty new to this but I have the same modem tried to only attach 2 antennas and couldn’t get it 2 work now I’m not sure if that was because I had the wrong 2 combination of pigtails attached to antennas or if it was because I didn’t have all 4 attached. I have 4 attached now and it’s working great. Any reason why you don’t want to use 4 antennas with this modem?

[Didneywhorl]

You'll want to use M and D/G, though the em20 is meant for 4 antennas, it should work.

There is no command to see each antennas signal strength. The command does exist (AT+QRSRP I think) but the EM20G does not support it, and Quectel has placed the device in development limbo for now. The Quectel EM16GL-R should be is successor.

[GeraldJ]

You'll want to use M and D/G, though the em20 is meant for 4 antennas, it should work.

There is no command to see each antennas signal strength. The command does exist (AT+QRSRP I think) but the EM20G does not support it, and Quectel has placed the device in development limbo for now. The Quectel EM16GL-R should be is successor.

Does the 16 in its name suggest it’s a cat 16 modem? Did they get too ambitious with the cat 20?

[Didneywhorl]

It is a cat16 modem.

Dunno. Maybe? Its a great modem, I'm guessing they set its price point low and still didnt have mass commercial orders. The EM160 isnt much cheaper.

[srunyon1]

so now you tell me after i spend $$$ on the EM20
i'm running on the M and M1 and it seems ok.
sometimes augmenting still on three antenna.
and FYI

Code: Select all

AT+QRSRP
ERROR

[Didneywhorl]

AT+QRSRP is supposed to be in the available commands but Quectel never implemented it. Confirmed by Quectel directly.

[farberm]

Did the implement AT+QRSRP on the EM160?

[gscheb]

Hello,
Looking for opinions about the EM20 performance from people using one.
Is it worth it upgrading to it from say a EP06 or EM12? That 4x4 Mimo get worthy gains?

[BillA]

Modem Status
AT+qnetdevstatus
AT+QNETDEVSTATUS
AT+QCAINFO < CA Info
they all error out.

I found a list of commands here someplace and copied them to a notepad, but can't find the link here again.

any help would be great.

thanks
Ziggy
Top

The correct format is:

Code: Select all

AT+QNETDEVSTATUS?
AT+QNETDEVSTATUS=?

[srunyon1]

Fyi both of those error out as well, starting to regret this modem purchase. It was working fine for about a month, we pretty impressed , then it just stopped connecting. now without many commands to see whats going on im at a loss. its just stuck on connecting, it sees the sim code but never connects.

[Yipzy]

Fyi both of those error out as well, starting to regret this modem purchase. It was working fine for about a month, we pretty impressed , then it just stopped connecting. now without many commands to see whats going on im at a loss. its just stuck on connecting, it sees the sim code but never connects.

Maybe it's time to reset it to factory but make sure you issue a command to save your backup. The command is somewhere on the forums. You could also try to downgrade or upgrade the firmware.

[Didneywhorl]

Did the implement AT+QRSRP on the EM160?

/yes, and it doesnt work quite as expected. Still figuring it out. The AT command manual isn't published yet.

[Didneywhorl]

Hello,
Looking for opinions about the EM20 performance from people using one.
Is it worth it upgrading to it from say a EP06 or EM12? That 4x4 Mimo get worthy gains?

From the EP06, absolutely. From the EM12 and is teh 4x4 worth it? Depoends on your needs. If you live under a full function low congestion cell tower that is giving all sorts of speed, then no. EM12 w/2x2 will rock over 300Mbps down. If you have signal issues, and even with max signal are only getting meh speeds, then a bumped up modem and extra set of antennas might give you some more oomph to your setup.