Is there any way (and sense) to adjust R11e-LTE6 to dB/dBi of attached external antenna to improve LTE stability?

[iScape]

LTE works on wide variety of frequency bands … starting as low as 700 MHz and up to 3.5 GHz. Most antennae don’t cover that range and even if they do, their performance is often suboptimal in certain parts of spectrum. So it is important to choose antenna which works decently good in frequency bands used for your particular connection.

Most of decent antennae are directional and it is important to point the antenna in direction which gives best signal quality (RSRQ as close to zero as it gets) with good signal strength (RSCP is always negative, aim is to have it least negative). Sometimes link performs better with slightly lower RSCP but with better RSRQ. Interference degrades RSRQ but directiinal antenna can kill interference if pointed appropriately).

There’s nothing you can do by tuning parameters/settings if antenna is no good.

I respect willingness to help. Still, if to put aside all those assumptions that you’ve mentioned (and imply they’re sorted out), is there any way (and sense) to adjust R11e-LTE6 to dB/dBi of attached external antenna to improve LTE stability?
http://forum.mikrotik.com/t/kb-lte-by-sib/151684/17