33.55 mi Link
NPX2 with Mimosa C5C

Good alignment makes a difference

Case Study : Heroica Guaymas, Sonora

In the city of Guaymas, Sonora, the neighbouring port of San Carlos was looking for more megabits for the residents of the area as well as to improve the telecommunications for the port operations since the current services cannot offer stable megabits due to the remoteness of the main cities and the copper infrastructure which is already insufficient for a growing city. Therefore the integrator opted for a link in 5 Ghz and 6 Ghz with NPX2 antennas with C5C radios where although there is a good amount of WISP the quality of the services is not optimal. This link consists of a trunk coming from Hermosillo, Sonora that joins as a redundant service but the level of interference is not comparable to the big cities of Mexico, adding a coastal area there are degradations of the links as we can see in the spectrum of this trunk. 

NP2 en alto ruido 54 km | Mimosa C5C

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Instalación NP2
NetPoint en Sonora

Installer recommendations

  • Alignment and fine tuning: The installer mentions that his best way to reach the centre lobe of the antenna is to use the Ubiquiti Rocket M5 radio at maximum power on frequency 5800 and channel width 20 MHz and tune with 10 MHz. 
  • Calculate the power of the radios vs distance and frequency: Although it may seem like something that is done from the beginning of the study, it is necessary to check the real noise levels to have the lowest dBi request.
  • Tape the Jumpers or Pigtails well: It is no secret that you must tape from the beginning of the dipole to the connector to avoid leaks.
  • Use thicker towers or upgrade to stronger models such as Z35 or Z45.
  • Do not install the antenna on a tower: The installer says that if you are looking for stability in the link in a windy area you should install it on an arm to avoid tower vibrations.
  • Install the ARNP2 armature or use NPX if you have many towers around.
Enlace con antena np2 54 kilometros  | NetPoint - Mimosa

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Integrator's comments 

For links of this type it is not necessary to have the 80 MHz channels working but to ensure good alignment to avoid hitting the secondary lobes of the antenna, the antenna is of good quality, light and above all you can implement accessories such as wind breaker radomes as anti-noise, for those who say that the armatures are not useful are wrong because they should evaluate the modulation of your radio vs the quality of the signal emanating from your antenna before and after that can be validated in the chains of both links.

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