EC200T module signal quality

Technical Subjects Hardware RF/Antenna
21

Thanks for the reply. Sorry just a newbie here. Just wondering how to check it by CMW500, and what does RSRP mean? Does the higher the negative value means the better the signal is?

22

RSRP range is from -44 dBm (excellent) to -140 dBm (no signal).

Ref: 3GPP 27.007, section 8.69.

1 Like
23

Maybe you need to buy an R&S CMW500 :sweat_smile:
Okey,you can check the AT command the first.

24

Thanks for all the responses @brown.du-Q @snowgum
Doing the AT command, I got this:

[2021-12-11 06:13:46] Recv Reply: AT+QENG=“SERVINGCELL”

+QENG: “servingcell”,“NOCONN”,“LTE”,“FDD”,515,66,3016401,202,9610,28,3,3,30F0,-95,-12,-,9,32

Also, the router is the same as on this video: https://www.youtube.com/watch?v=_fJO-3AH3oo

25

hi every body.
actually I’m facing nearly the same problem with the ec200t modem. the results for the at+qeng=“servigcell” is as below:
+QENG: “servingcell”,“NOCONN”,“LTE”,“FDD”,432,11,1693B05,496,1423,3,5,5,A8CA,-92,-8,-81,7,27
if I’m not wrong the RSRP seems not to be that bad; but the fact is that the internet speed is sooo poor, about a few KBs and there is “NOCONN” and also No Internet Connection written below the network device in windows.
attached will be the response for the “neighbourcell”:
At+qeng=“neighbourcell”
+QENG: “neighbourcell inter”,“LTE”,550,496,-140,-20,-,-,0,10,10,5
+QENG: “neighbourcell inter”,“LTE”,3300,65535,-140,-20,-,-,0,10,10,5
+QENG: “neighbourcell inter”,“LTE”,3102,65535,-140,-20,-,-,0,10,10,5
+QENG: “neighbourcell inter”,“LTE”,3250,65535,-140,-20,-,-,0,10,10,5
+QENG: “neighbourcell intra”,“LTE”,1423,219,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,452,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,36,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,80,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,369,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,451,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,79,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,193,-100,-17,-,-,19,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,205,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,366,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,368,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,371,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,495,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell intra”,“LTE”,1423,497,-140,-20,-,-,0,5,5,4,25
+QENG: “neighbourcell”,“GSM”,99,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,98,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,97,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,96,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,95,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,94,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,93,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,92,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,91,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,90,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,89,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,88,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,87,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,86,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,104,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“GSM”,103,0,0,0,0,0,255,0,0
+QENG: “neighbourcell”,“WCDMA”,3046,2,10,10,65535,0,0,0
+QENG: “neighbourcell”,“WCDMA”,3021,2,10,10,65535,0,0,0
+QENG: “neighbourcell”,“WCDMA”,10787,3,10,10,65535,0,0,0
+QENG: “neighbourcell”,“WCDMA”,10762,3,10,10,65535,0,0,0

actually I’m a newbie to these modules era and any help would be appreciated.
Thanks in advance

26

You are surrounded by B3 cells with EARFCN=1423, all with different Physical Cell IDs.

Your serving cell has 20 MHz of bandwidth, so the poor performance may indicate congestion on it.

Is it slow when other users would be asleep?

You are showing LTE cells on B1 (EARFCN 550) and B7 (EARFCNs 3300, 3102 and 3250) as well. You could try band-locking to either or both of those bands.

“NOCONN” is normal for an LTE packet-domain connection.

27

Thanks for the response.
Sorry if I am a newbie
That would be appreciated if you could help me with the exact commands and instructions

28

Before you start bandlocking, you should read the current setting and make a note of it.

The command to do that is:

AT+QCFG=“band”

Your neighbourcell list showed cells on bands B1, B3 and B7.

To change the LTE bandlock, the command is

AT+QCFG="band",0,<LTE bandmask>

You might find these bandmasks useful for experimentation:

B1: 1
B3: 4
B7: 40
B1 + B3: 5
B1 + B7: 41
B3 + B7: 44

So to bandlock to B3, the AT command is:

AT+QCFG=“band”,0,4

For B3 + B7 it is:

AT+QCFG=“band”,0,44

and so on.

You may need to power-cycle the modem to get a connection back with the new bandmask.

The special value of 7FFFFFFFFFFFFFFF should get you back to the default bandmask, executed as:

AT+QCFG=“band”,0,7FFFFFFFFFFFFFFF

29

thanks for your help
I changed the LTE band lock but still, I don’t have any internet connection.