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VSAT technology and installation >> iDirect Forum: hubs and terminals >> power equivalent bandwidth
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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)?

Title: Re: power equivalent bandwidth
Post by Admin1 on Mar 15th, 2015 at 2:18pm
Complete explanation here:
http://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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