C Band dual Pol LNBF (pics)

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Biswajit.HD

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Here are the pics of C band dual Pol LNBF :


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Image courtesy : Vinay Kumar (ddf)
 
A low-noise block downconverter (or LNB) is the receiving device of a parabolic satellite dish antenna of the type commonly used for satellite TV reception. The device is sometimes wrongly called an LNA (Low-noise amplifier), LNC (for low-noise converter) or even LND (for low-noise downconverter) but as block-downconversion is the principal function of the device, LNB is the preferred term, although this acronym is often incorrectly expanded to the incomplete descriptions, low-noise block or low-noise block converter.

The LNB is a combination of Low-noise amplifer, block downconverter and IF amplifier. It takes the received microwave transmission, amplifies it, downconverts the block of frequencies down to a lower block of intermediate frequencies where the signal can be fed to the indoor satellite TV receiver using relatively cheap cable.
The signal from the dish is picked up by a feedhorn and is fed to a section of waveguide. In this waveguide a metal pin, or probe, protrudes into the waveguide at right angles to the axis and this acts as an aerial, and feeds the signal to a printed circuit board in the LNB.

The LNB is usually fixed on the satellite dish framework, at the focus of the reflector, and it derives its power from the connected receiver. This power is sent "up" the same cable that carries the received signals "down" to the receiver. The corresponding component in the transmit link uplink to a satellite is called a Block upconverter (BUC).
 
Very nice Biswajit. Please watermark the images. You know the reason :)

@Offtopic: Many Vegetarian Divine Dinosaurs (reporters) are roaming on DDF
 
Good work biswa bro. +rep frm me for these valuable pics. And info. Also your 150th rep.
 
biswajit.HD said:
A low-noise block downconverter (or LNB) is the receiving device of a parabolic satellite dish antenna of the type commonly used for satellite TV reception. The device is sometimes wrongly called an LNA (Low-noise amplifier), LNC (for low-noise converter) or even LND (for low-noise downconverter) but as block-downconversion is the principal function of the device, LNB is the preferred term, although this acronym is often incorrectly expanded to the incomplete descriptions, low-noise block or low-noise block converter.

The LNB is a combination of Low-noise amplifer, block downconverter and IF amplifier. It takes the received microwave transmission, amplifies it, downconverts the block of frequencies down to a lower block of intermediate frequencies where the signal can be fed to the indoor satellite TV receiver using relatively cheap cable.
The signal from the dish is picked up by a feedhorn and is fed to a section of waveguide. In this waveguide a metal pin, or probe, protrudes into the waveguide at right angles to the axis and this acts as an aerial, and feeds the signal to a printed circuit board in the LNB.

The LNB is usually fixed on the satellite dish framework, at the focus of the reflector, and it derives its power from the connected receiver. This power is sent "up" the same cable that carries the received signals "down" to the receiver. The corresponding component in the transmit link uplink to a satellite is called a Block upconverter (BUC).

thanks for explaintion . In addition to this . A universal lnb . Have signal reciving two dipoles placed in 90 deg . Each dipole pin work for respective polarity . Here is how polarity selected . A reciver sends a voltage to lnb . If a reciver sends 18 volt then horizontal polarity is activated . If reciver sends 14 volts to lnb then . Vertical polarity activated
 
@vishvish : Thanks for the additional info too... i have lot to learn, and ya satellite tracking is lot of fun, then simply sitting in front of a dth connection at home :) im luving it :)
 
welcome to sat zone .yes it is intresting subjuct. when i was young in 95 .i was forced to attract to sat tracking .and it is still on . there is lot more to learn
 
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