ALU is everywhere in the world… Not the biggest vendor, but since there are several operators per country, there is always one of them choosing ALU.
your PC settings regarding the QUALITY if totally wrong.
Regarding the LEVEL, my settin
gs are safr than yours : the LEVEL will not decrease as much as with your settings. (your settings : target rxlev = -80dBm, my settings : target rxlev = -75dBm)
DTX also should be enabled
DTX_UL = SHALL USE
DTX DL = SHALL USE
I don’t understand what is your problem with the PC. Of course the LEVEL is going to decrease, that is the purpose of PC. Enable it everywhere : Suburban, Urban, Rural. If your LEVEL settings are not too low, there will never be a problem.
Experiencing a little RXLEV variation during IDLE MODE is normal. Your variations are a too strong though, especially if you were in LoS of the antenna.
Can you establish a call on that cell ? Can you try getting a TCH on the TRX1 ? When the TCH is on TRX1, do you still see those variations ?
To force the BSC to give you a TCH on TRX1, you can simply play around with the TRX PREF MARK. Put TRX PREF MARK = 1 on the TRX1, and 0 on the other TRXs.