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Intensive VSAT Field Engineering Training

March 31, 2020 – April 3, 2020 all-day
Steve Njenga

Course Outline:

DAY 1.


  • Introduction to satellites and satellite theory
  • Details of the Components of a satellite
  • Brief History of satellites communication
  • Different types of Satellite orbits
  • Satellite Types with focus on Communication satellites
  • Radio Frequency Spectrum with focus on Satellite frequencies ( L band, KU band, C band)
  • Definition of Satellite footprints
  • Types of Satellite beams
  • Satellite elements
  • Satellite signals
  • Introduction to RF basics Introduction to VSAT

Introduction to VSAT

  • VSAT application
  • Advantages and disadvantages of VSATs
  • Comparison of VSAT with other terrestrial links
  • VSAT Technology
  • VSAT Frequency bands in details
  • Details of VSAT components-BUC, LNB, Teleport, NOC, Transponder details, Antennas, Feedhorn.

Practicals: Practical demonstration of components of the assembly: Block UP Converters (BUC), Low Noise Blocker (LNB), Feed horn, OMT (Orthomode Transducer)



VSAT Access Methods:

  • Types of Access Methods – Dedicated VS Shared
  • Dedicated methods – SCPC
  • Shared Access
  • Need for frequency optimization
  • Signal separation
  • Shared Access – FDMA
  • Shared Access – TDMA
  • Shared Access – CDMA
  • Capacity allocation
  • VSAT carriers- upstream downstream
  • Link Parameters – Data rate. Modulation, FEC & Reed Solomon
  • Bit rate and Symbol rate
  • Definition and relationship between BER & EbNO
  • Definition and differentiation if a CW & Modulation carrier

Types of VSAT Networks:

  • VSAT Connectivity
  • VSAT Topologies
  • Propagation delay
  • Value of the satellite system
  • Data communication basics
  • Data communication Protocols in brief
  • Types of VSAT data traffic
  • TCP acceleration
  • Quality of Service (QOS) in VSAT links


Practicals: Types of Modems and their uses.

Show the class different kind of VSAT modems & perform modem configuration

DAY 3:

Fundamentals of VSAT Systems:

  • Terminologies with respect to Antennas e.g Gain, Patterns, Band width, lobes etc
  • Antenna Types and Operating principles
  • Antenna classes as approved by Satellite operators.
  • Types of mounts that support VSATs
  • Antenna and Feed Systems: Tx/Rx, Dual Rx, RO

Theory of Wave Polarization.

  • Launching Linearly Polarized Waves
  • Matching TX and RX Antenna Orientations
  • Cross-Polarized Signals and XPD
  • Pol Frequency Re-use and Cross-Pol Transponders
  • Cross-Pol Interference Ø Linear and Circular Polarization
  • Types of cables and their Suitability: RG6, RG11, Rg213 etc
  • Types of connectors and their Suitability.
  • Tools used in terminating cables/crimping tools.
  • Preview of Large Earth Station Equipment.
  • Typical block Diagrams of VSAT systems.

Site Survey:

  • Undertaking a Site Survey.
  • Filling out a Site Survey Report.

VSAT Installation Concepts:

VSAT pointing variables: Latitude, Longitude, Azimuth, Elevation, GEO Arc, AZ-EL Beam Movement Across the Arc

Tools & Equipment used when pointing at site:

  • Installation Steps: Cabling, Assembly, Pointing, Commissioning i.e Carrier Lineup and Cross-Pol Checks, Testing
  • Common Faults and problems

Practicals: Feed Assembly, Mount Assembly, reflector Assembly

DAY 4:


  • Antenna assembly.
  • Antenna Pointing using Satellite modem.
  • Antenna pointing using a Spectrum analyzer
  • Antenna pointing using a Field Strength Meter (FSM).
  • Checking site receive levels: EbNo, BER, SNR

Course closure and issuing of certificate.

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Westlands Commercial Centre
Nairobi - Kenya

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