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02-08-2019

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X270 WWAN perfromance

2019-02-08, 10:33 AM

Hi Team,

I have a Thinkpad x270 (System Model 20HNCTO1WW) and have purchased a Lenovo ThinkPad EM7455 4G LTE Mobile Broadband (Part No: 4XC0M95181).

I was very surprised that I only saw two signal bars compared to my Singeltel-Optus LTE USB stick (HUAWEI E3372) which shows four signal bars. Also the throughput (up and download) seems to be faster through the USB stick compared to the now integrated and embedded Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A. Do I have some sort of antenna interfeerence/performance? Any other issues I should consider.

 

Thank you for your feedback

 

Cheers Jose 

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12613 Posts

06-06-2011

RU

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Re: X270 WWAN perfromance

2019-02-08, 11:00 AM
Welcome to the Community

Bad signal possible causes:
- wwan antennas cables inside of the laptop are routed rough, with corners
- red and blue cables are connected to the modem unproperly (mixed)
- the antenna cable or connector is broken
- the connection of the cable and modem's connector isn't reliable
- the modem is connected to the cellular base station with low signal strength
- etc

Low performance possible causes:
- low signal/noise ratio
- the connection is established to 3g network, not LTE one
- em7455 and e3372 operate in different network frequency bands with different signal strength and bandwidth
- etc

Two commands below might show some information. Type them in the command prompt window and show the output here:
netsh mbn sh con int=*
netsh mbn sh sig int=*:



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

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4 Posts

02-08-2019

AU

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Re: X270 WWAN performance

2019-02-09, 3:47 AM

Thank you for your quick response X220forme,

 

C:\WINDOWS\system32>netsh mbn sh con int=*

 

Connection information for interface Cellular:

-------------------------------------

    Interface State       : Connected

    Register State        : Home

    Register Mode         : Automatic

    Provider Name         : YES OPTUS

    Provider Id           : 50502

    Provider Data Class   : LTE

    Number of connections : 1

 

      Serial number #1

        Connection Id         : 39

        Access Point Name     : connect

 

 

C:\WINDOWS\system32>netsh mbn sh sig int=*:

The given interface is not present or not a Mobile Broadband interface.

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12613 Posts

06-06-2011

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Re: X270 WWAN performance

2019-02-09, 7:54 AM
There was excess symbol - colon - at the end of the 2nd command in my post above, sorry. Repeat, please, this command.



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

Communities:   English    Deutsche    Español    Portugues    Русскоязычное    Česká    Slovenská    Українська   Moto English

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4 Posts

02-08-2019

AU

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  • Message 5 of 6

Re: X270 WWAN performance

2019-02-10, 5:11 AM

Here we go:

C:\WINDOWS\system32>netsh mbn sh sig int=*
Signal information for interface Cellular:
-----------------------------------------------
    Signal         : 16%
    RSSI / RSCP    : 5 (-103 dBm)
    Error Rate     : 99
    Rssi interval  : 5
    Rssi threshold : 2

C:\WINDOWS\system32>
 
Cheers
 
Jose
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12613 Posts

06-06-2011

RU

17677 Signins

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  • Posts: 12613
  • Registered: ‎06-06-2011
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  • Message 6 of 6

Re: X270 WWAN performance

2019-02-10, 7:54 AM
Thanks

Check out the antennas wires routing, their connectors and connection with modem, i.e.the 1st group of items above.



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

Communities:   English    Deutsche    Español    Portugues    Русскоязычное    Česká    Slovenská    Українська   Moto English

Browser Search to find the answers in the Lenovo and Moto Community
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