Microwave arrangement is additionally alleged Radio Relay Terresterial system, for use Captive or Relay Arrangement and its actuality from one breadth to addition breadth breadth Terresterial is one of the important manual average in a accessible advice network.
SYSTEM LOS (Line Of Sight)
In LOS systems Radio beachcomber emitted from a transmitter antenna to receiver antenna through chargeless amplitude in a position to be on a band with no obstructions.
Space beachcomber advancement in LOS systems will acquaintance some accident of energy, amid others:
a) Caused by the advance of the transmitter antenna, which is almost actual baby bulk so that in the calculations ignore.
b) Due to the abrasion forth reabatan frequently alleged the Chargeless Amplitude Accident or frequently accepted as FSL.
c) Due to the damping due to the access of the weather.
Antenna
The antenna is a accessory acclimated to move the electromagnetic after-effects from the agriculturalist and carnality versa. Agriculturalist in catechism is a coaxial cable or waveguide. An antenna can be as a transmitter or receiver antenna at the aforementioned time.
The alternative is usually based on those antenna impedance, polarization, gain, and axle pattern. For the accord of point to point antennas commonly acclimated with a accretion as aerial as possible, while for point to multipoint depending on advantage area. For radio transmitters are usually directed to all accumbent directions, while for vertical administration abolished.
Satellite dishes are broadly acclimated in earthbound bake advice systems and accessory communications systems that accomplish on the adjustment of gigahertz abundance operation because it has aerial accretion (about 40 to 55 dB).
Parabolic antenna consists of two capital parts, namely:
Paraboloid reflector
Antenna accumulation is usually a horn antenna (feed horn)
Characteristics of Radio Manual Arrangement Application earthbound GMD
Terrestrial radio manual systems application agenda bake has the afterward characteristics:
▪ advancement of radio after-effects through amplitude abreast Earth, so the aisle advancement LOS (Line Of Sight) or the chargeless aisle of view. This agency that the antenna transmitter and receiver antennas charge be aural one band of sight, not hindered by the barriers (obstacles)
▪ In general, assignment on bounded VHF (Very Aerial Frequency) or college such as the SHF.
▪ multichannel transmission, accustomed a cardinal of channels of information.
▪ radio beachcomber advancement is afflicted by amplitude abrasion and assimilation by particles in space.
▪ Manual with accentuation digital.Kelebihan and weaknesses GMD
Pros:
Easy abundant in administering aliment at the base because the sender, receiver, and repeater.
PERPU risks airish by abashed manual media almost baby back compared with optical cilia that every moment is decumbent to collisions, animal activities, etc..
Weaknesses:
▪ In the antecedent installation, GMD requires expensive.
Placement ▪ base - the base is afflicted by altitude, location, and geographic conditions. This is afflicted by the use of actual aerial abundance (GHz), breadth the abundance of these altitude crave LOS (Line Of Sight) amid the sender and almsman to be able to acquaint with anniversary other.
Digital Trans Sulawesi), whereby anniversary radio approach to address the baseband agenda arresting with a acceleration of 140 Mbps, agnate to 1920 articulation channels and formed on the angle frequencies up to 7.1 Ghz 6.4.
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