Hi.
I am trying to set nrdc_5g band to card via AT-chat but card wont change settings. return value is OK but still band are 0
[xxxxxxxxx] > interface/lte/at-chat wait=yes
input: AT+QNWPREFCFG=“nrdc_nr5g_band”,78:28:7:3:1
number: 0
output: +QNWPREFCFG: “nrdc_nr5g_band”,0
OK
[xxxxxxxx] > interface/lte/at-chat wait=yes
input: ATI
number: 0
output: Quectel
RM520N-EU
Revision: RM520NEUDAR03A04M4G
OK
Can this card used with 5G SA network? N78+N28
Br.
-Janne-
My RG50xQ&RM5xxQ Series AT Commands Manual gives the command as:
AT+QNWPREFCFG="nr5g_band"
I see no reference to “nrdc_nr5g_band”.
input: AT+QNWPREFCFG=?
number: 0
output: +QNWPREFCFG: “gw_band”,B1:…:BN
+QNWPREFCFG: “lte_band”,B1:…:BN
+QNWPREFCFG: “nrdc_nr5g_band”,B1:…:BN
+QNWPREFCFG: “nsa_nr5g_band”,B1:…:BN
+QNWPREFCFG: “nr5g_band”,B1:…:BN
+QNWPREFCFG: “mode_pref”,RAT1:…:RATN
+QNWPREFCFG: “srv_domain”,(0-2)
+QNWPREFCFG: “voice_domain”,(0-3)
+QNWPREFCFG: “roam_pref”,(1,3,255)
+QNWPREFCFG: “ue_usage_setting”,(0,1)
+QNWPREFCFG: “policy_band”
+QNWPREFCFG: “ue_capability_band”
+QNWPREFCFG: “rat_acq_order”,RAT1:…:RATN
+QNWPREFCFG: “nr5g_disable_mode”,(0-2)
+QNWPREFCFG: “rf_band”
+QNWPREFCFG: “restore_band”
OK
Now i have 5G SA connection to network but after short while modem is connected to N78 and mayby NR-CA N78+N28 modem will crash totally.
Any ideas???
Maybe antenna doesn’t support band 28. LB should be connected pin 0 &3
N28 band is not in best performce area.
IF i use only N78 performance is very good ans stable.
N28 signal values
N78 Signals values
But if i try NR-CA modem will crash totally after short while. probably there is a compatibility problem or a firmware problem between the router and the modem card.
Router is Mikrotik LHGG.
Check the power supply to the modem is adequate.
NR5G modems need a lot of power, especially with extra bands active.
That is possible.
B1+B3+B7+N78 works good. and N78 600Mbps/50Mbps but cannot get NR-CA working now.
Hi,
I see you have the EU model of the RM520. I have the GL version but also have been experiencing issues with b28 and b78 together with CA. I’m not an expert on such things nor was I experiencing crashes, maybe however you might find something helpful with my findings reported in RM520N-GL firmware issues (bugs) in latest release.
I don’t know if it was a good option to choose the EU version or if the GL version would have been better.
At least there have been no new firmware versions for the EU version, so I don’t know if the modem supports how well SA orders in Finnish networks.
It may be that the settings are not quite right yet, but you have to try to test and search for optimal settings.
I have one version newer firmware on my laptop but waiting good moment to test upgrade modem card firmware
For reference I am in Finland also (using provider Elisa).
Same network provider here, i just updated the 5g subscription to SA.
Good result when using only one N78 band. stable 600/50Mbps
What platform/router u are using with RM520N card?
We have the basic 5g subscription, the router with the RM520GL is a Cudy P5 (from verkkokauppa).
Seems like power supply issues.
