Improving signal noise

Reference RG58 cable:
Note:
The installation notice:
Make sure antenna is placed as high as possible with no
nearby objects at least 50cm away from the other
antenna.Antenna need to be on the top of the pole and
cannot be placed in the middle of the pole,unless you
use the horizontal stand-off arm,at least
FOREMENTIONED 50cm apart from the pole.
Use the high quality 50 Ohm low loss cable like H155 OR
H1000 and within 10m of lenght maximum.**Don´t use the
satellite cable as being 75Ohm neither RG58 which is
not suitable for this frequency and have high losses.
Don´t use any SO239-PL259 as pigtails for this high
frequency.