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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

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cityman1us
 Post subject: Communication satellite payload architecture simulation tool
Posted: Wed Aug 20, 2008 11:01 am 
 
Lieutenant

Joined: Tue Aug 19, 2008 10:33 am

Posts: 1

Dear All;

If there exists any tool that will simulate the end-to-end payload achitecture starting with the receiver antenna upto the TX antenna, I would like to know.

Thanks for the info in advance,

Mehmet


 
   
 
RFDave
 Post subject: Payload Architecture Simulaiton
Posted: Sat Aug 23, 2008 8:40 pm 
 
Captain
User avatar

Joined: Sat Apr 22, 2006 11:14 pm

Posts: 22

I would start with a spreadsheet and work up from there.

Dave


 
   
 
nubbage
 Post subject:
Posted: Mon Aug 25, 2008 5:00 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm

Posts: 312

Location: London UK

Every time I have incorporated a VSAT system into an overall network, the supplier, back in the day it would be Marconi, BTI or Ferranti, had their own software model developed just as rfdave advises: from the block schematic of the satellite transponder transferred to a spreadsheet using the published parameters for each block. For example Rx G/T, min and max drive levels, Tx power output, Tx G/T and so on.

The power of this approach is that you need to study the transponder structure as well as the physical significance of the parameters. That way you get to understand how the system works, and what the answers from the model really mean.

If you go for a quick fix of applying someone else's software without studying what these blocks of the model do, then you can be easily misled.

To understand the answer it is best first to understand the question.


 
   
 
cricky
 Post subject: Re: Communication satellite payload architecture simulation tool
Posted: Fri Jul 24, 2009 11:47 am 
 
Lieutenant

Joined: Fri Jul 24, 2009 11:36 am

Posts: 1

same here knowing how to use spreadsheets goes a long way in saving time.

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- commission de surendettement, vous pouvez demander un dossier de surendettement.


 
   
 
insarabasab
 Post subject: Re: Communication satellite payload architecture simulation tool
Posted: Sun Aug 09, 2009 12:59 pm 
 
Lieutenant

Joined: Sat Aug 08, 2009 11:40 am

Posts: 2

Thats the purpose of the spreadsheet, to save you time.

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