GL-X3000: External antenna configuration

Hello,

I need assistance. I have a GL-INET X3000 modem. I have two external antennas with 2 ports each. My situation is a bit special: LTE signal comes from a different tower than NR5G signal. I am running LTE (B1+B3) and NR5G (N78) in 5G NSA mode.

The modem has ports:

MAIN
DIV
MIMO 1
MIMO 2

How do I correctly connect the ports to my two antennas, so that one antenna can target the LTE tower and the other antenna can target the NR5G tower?

Is it correct that MAIN+DIV goes to LTE antenna and MIMO1+MIMO2 goes to NR5G antenna?

Thanks!

It is not possible to determine which one of 4 antennas is connected to LTE or NR. Without distinguishing between LTE or NR, it is possible that one antenna (such as Main antenna) is connecting to LTE and NR at the same time.

As long as it is a 5G cellular modem, all antennas need to be connected to the 5G NR antenna.

That's not true, if you read the hardware design spec of RM520N-GL, you can clearly see that each technology/frequency is mapped to ANT1,ANT2,ANT3,ANT4. I just don't know the mapping of the modem ANT ports to the X3000 labels.Can you please check again and let me know the antenna ports for separation of LTE MHB and NR5G UHB?

My LTE tower is in 180° opposite direction of the NR5G tower, so it's not possible for both antennas to connect to LTE and NR5G at the same time. Right now, I have connected the LTE antenna to MAIN+DIV and the NR5G antenna to MIMO1+MIMO2, but I wonder whether this configuration is correct, because I see performance issues.

Please feedback, thank you.

The hardware spec shows all antennas both response the NR and LTE signal.

This is the X3000 casing SMA corresponds to Modem connector:
Main,ANT0
MIMO1,ANT1
MIMO2,ANT2
DIV/GNSS,ANT3

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For 2x2 MIMO configuration on 5G NR n78, which ANT must be connected? Shall it be a combination of TX0/PRX + PRX MIMO, or it needs to be TX0/PRX + TX1/DRX?

What is the difference between PRX and DRX?

Thank you!

These parameters probably require asking the Quectel support.

2x2 MIMO is ANT0/ANT3 (Main and DIV). Before receiving/installing my Peplink 42G router in my RV, I used my GL-X3000 with a 2x2 MIMO antenna. I used the 2x2 MIMO for about two months in several locations, including some challenging areas with poor signal; I also had a mix of LTE, 5GNSA, and 5GSA. In all cases, ANT0/ANT3 (Main and DIV) are the primiary antennas.

I'm sorry, but you can't split the antennas with half pointing one way for 5G and the other half pointing another way for 4G/LTE in the way you've described. Its simply not how the modem module is designed. Your best options would be (1) a single high-gain 4x4 MIMO omnidirectional antenna raised on a pole (you'll gain about 3dbi for every 10' you raise the antenna), (2) run two separate devices (e.g. if you have a 4G hotspot with antenna ports you can use a hotspot with your 4G SIM and plug it into your GL-X3000 either with USB tethering -or- ethernet - you can then use the X3000's built-in Multi-WAN to control connection) (3) swap the antenna cables as required.

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