Is there a specific AT command syntax for the SXT LTE7 modem

Hardware MikroTik hardware general
1

Subject: Force specific EARFCN as Primary Cell on SXT LTE7 kit while keeping Carrier Aggregation active

Hi everyone,

I am using a MikroTik SXT LTE7 kit (RouterOS v7.x) and I am trying to force the modem to lock onto a specific EARFCN as the Primary Cell, while still allowing Carrier Aggregation (CA) for additional bandwidth.

Current Environment & Goal:

  • Device: SXT LTE7 kit
  • Target EARFCN: 3048 (Band 7)
  • PHY Cell ID: 50
  • Location: Rural area with interference; this specific cell offers the best RSRP/SINR.

Problem:
The modem frequently jumps to EARFCN 2850 as the primary cell, which results in lower performance. I have tried the following AT commands via /interface lte at-chat:

  1. AT*CELL=2,3,3048,50 (To lock the cell)
  2. AT*CELL=0 (To enable CA after locking)

However, the lock does not seem to persist or the modem ignores the priority of EARFCN 3048.

Questions:

  1. Is there a specific AT command syntax for the SXT LTE7 modem to strictly lock the Primary Cell?
  2. Is it possible to maintain Carrier Aggregation while a Primary Cell lock is active on this hardware?
  3. Are there any known firmware-specific limitations for cell locking on the LTE7 kit?

Any advice or working script examples for this specific model would be greatly appreciated.

Thanks!