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VSAT technology and installation >> iDirect Forum: hubs and terminals >> power equivalent bandwidth https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1426408182 Message started by VSATEngineer on Mar 15th, 2015 at 8:29am |
Title: power equivalent bandwidth Post by VSATEngineer on Mar 15th, 2015 at 8:29am
What's PEB and what's the important role of it, (power equivalent bandwidth)?
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Title: Re: power equivalent bandwidth Post by Admin1 on Mar 15th, 2015 at 2:18pm
Complete explanation here:
https://www.eutelsatamericas.com/files/contributed/PDF/support/Eutelsat-Americas-Technical-Standards-2014.pdf I suggest you download it and keep a copy. It says that your share of the power you are allowed from the transponder must be proportional to your paid-for bandwidth versus the bandwidth of the transponder. The transponder will be backed off for multi-carrier operation, to keep the intermodulation noise level acceptable. So, for example If transponder single carrier EIRP=50 dBW (on some contour) Output back off = 1.5 dB Total of all carriers in transponder, output EIRP = 48.5 dBW Transponder bandwidth = 72 MHz. Your leased bandwidth = 18 MHz You get 50 - 1.5 + 10 log(18/72) dBW. = 50 -1.5 -6 dBW Your downlink carrier EIRP = 42.5 dBW Best regards, Eric. |
Title: Re: power equivalent bandwidth Post by VSATEngineer on Mar 16th, 2015 at 1:33pm
Thanks alot Eric.
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