Understanding Lnb Frequency and Transponder Frequencies
| Understanding LNB Frequencies and Transponder Frequencies « on: April 01, 2008, 07:44:50 PM »http://www.galaxy-marketing.com/satellite-support-forum1/index.php?topic=39.0 | |
These are LNB types and frequencies:
DSS Circular LNB = 12.2GHz-12.7GHz
Standard FSS Linear LNB = 11.7GHz-12.2GHz
Universal FSS Linear LNB = 10.7GHz-12.7GHz
Keeping the above frequency range in mind, now let's look at the frequency ranges of your transponder. Keep in mind that the transponder frequencies are presented in MHz.
All DISH Network, DirecTV, and BEV satellites on DSS have transpnder frequencies that don't go below 12200MHz and don't go above 12700MHz.
All Ku band FSS satellites within North America have transponder frequencies ranging no less than 11700MHz and no more than 12200MHz. For example, on Galaxy 25, the first Ku band transponder frequency is 11716 MHz and the last TP is 12177 MHz.
Now that you know this, cross reference the transponder frequencies and the LNB Input Frequency. Does this start to make sense a bit more?
Universal LNBs http://www.topbits.com/lnb.html LNB (Low Noise Block)
A universal LNB can receive both polarizations and the full range of frequencies in both the Ku and C satellite band.
Some LNBs can receive both polarizations simultaneously (through 2 different connectors), while other LNBs have either switchable or adjustable polarization.
Typical Universal LNB specifications are: * Local Oscillator (LO): 9.75 GHz /10.6 GHz * Frequency: 10.7 GHz-12.75 GHz * Noise Figure (NF): 0.7 dB * Polarization: Linear
Standard DBS LNB example: * Local Oscillator (LO): 11.25 GHz * Frequency: 12.2 GHz-12.7 GHz * Noise Figure (NF): 0.7 dB * Polarization: Circular
Typical North American C-band LNB specs: * Local Oscillator (LO): 5.15 GHz * Frequency: 3.6-4.2 GHz * Noise Figure (NF): 15 to 100 Kelvins (uses Kelvin ratings as opposed to dB rating) * Polarization: Linear
Dual and Quad LNBs
These are LNB types and frequencies:
DSS Circular LNB = 12.2GHz-12.7GHz
Standard FSS Linear LNB = 11.7GHz-12.2GHz
Universal FSS Linear LNB = 10.7GHz-12.7GHz
Keeping the above frequency range in mind, now let's look at the frequency ranges of your transponder. Keep in mind that the transponder frequencies are presented in MHz.
All DISH Network, DirecTV, and BEV satellites on DSS have transpnder frequencies that don't go below 12200MHz and don't go above 12700MHz.
All Ku band FSS satellites within North America have transponder frequencies ranging no less than 11700MHz and no more than 12200MHz. For example, on Galaxy 25, the first Ku band transponder frequency is 11716 MHz and the last TP is 12177 MHz.
Now that you know this, cross reference the transponder frequencies and the LNB Input Frequency. Does this start to make sense a bit more?
Universal LNBs http://www.topbits.com/lnb.html LNB (Low Noise Block)
A universal LNB can receive both polarizations and the full range of frequencies in both the Ku and C satellite band.
Some LNBs can receive both polarizations simultaneously (through 2 different connectors), while other LNBs have either switchable or adjustable polarization.
Typical Universal LNB specifications are: * Local Oscillator (LO): 9.75 GHz /10.6 GHz * Frequency: 10.7 GHz-12.75 GHz * Noise Figure (NF): 0.7 dB * Polarization: Linear
Standard DBS LNB example: * Local Oscillator (LO): 11.25 GHz * Frequency: 12.2 GHz-12.7 GHz * Noise Figure (NF): 0.7 dB * Polarization: Circular
Typical North American C-band LNB specs: * Local Oscillator (LO): 5.15 GHz * Frequency: 3.6-4.2 GHz * Noise Figure (NF): 15 to 100 Kelvins (uses Kelvin ratings as opposed to dB rating) * Polarization: Linear
Dual and Quad LNBs