Feedhorn and LNB

The feedhorn is a device that collects the signals at the focus of the satellite dish and channels them to the LNB (Low Noise Block Down Converter). The LNB amplifies the received signals (3.6 – 4.2 GHz for C-band or … Continue reading →

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Satellite Loopback and a Terrestrial TX/RX loopback

IF loop: This command temporarily reconfigures the receive parameters to match the transmit parameters and internally connects IF out to IF in.  Useful to verify that the modem is OK. You don’t need to touch the external connectors. RF loop: … Continue reading →

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Satellite Internet Systems

One-way satellite internet system In a one-way satellite system, which is also known as a hybrid system, the information downloads rapidly to your computer via the satellite. However, information travels up to the Internet via your standard phone line. This … Continue reading →

A microwave link is a communications system that uses a beam of radio waves (> 1GHz) in the microwave frequency range to transmit information between two fixed locations on the earth. Microwaves are short-wavelength, high-frequency signals that occupy the electromagnetic … Continue reading →

RF is Radio Frequency that LNB can receive from a satellite. This would differ between a C-Band LNB, a Ku band standard LNB IF is Intermediate Frequency LO is local oscillating frequency The relationship between all these parameters are  RF … Continue reading →

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Upgrading firmware for Satellite Modem with Remote control

A good data connection really needs to be made on the DB-25 interface in order for the remote serial interface to work. In the uncommon case one needs to upgrade firmware, it is a simple process provided: You are using … Continue reading →

A microwave link is a communications system that uses a beam of radio waves (> 1GHz) in the microwave frequency range to transmit information between two fixed locations on the earth. Microwaves are short-wavelength, high-frequency signals that occupy the electromagnetic … Continue reading →

There are three basic principles in multiple access, FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), and CDMA (Code Division Multiple Access). All three principles allow multiple users to share the same physical channel. Time Division Multiple Access … Continue reading →

 TV Broadcasting via Satellite TV-Broadcasting-via-Satellite-and-Microwave-Relay TV Broadcasting Combined System using Internet Advantages Low Cost Good for initial start-up broadcasting Good for music, entertainment related broadcasting Disadvantages No Live coverage because of Internet upload … Continue reading →