www.satsig.net

Satellite Internet Forum.

Welcome, Guest. Welcome to anyone who has come from the Space forum. I can cope with one forum, but not two. The Space forum has been deleted       Forum rules.
      Home            Login            Register          
Pages: 1

specs write up

(Read 2095 times)
Ex Member
Ex Member


Jan 12th, 2011 at 12:31pm  
Dear Eric,

Thank you for your help. I have a question for you how to write the specs for harmonic rejection,spurious (In/Out of band ) and image frequency rejection for a down converter ? Is there any calculations involved in this ? Please send any literature which related to the above.

Regards,
SRIKANTH
Back to top
 
 
IP Logged
 
Eric Johnston
Senior Member
★★★
Offline



Posts: 2109
Reply #1 - Jan 12th, 2011 at 4:47pm  
In the last 10 years I've not thought much about the specs for downconverters (e.g C band or Ku band down to 70 MHz).  We used to use whatever kit was supplied by reputable manufacturers.  I rather thought that such devices were now near obsolete, now that L band is so common as an earth station IF.

I suggest you look at the specification of competitors equipment and search the internet for relevant documents regarding the design of downconverters. Google for terms like .. direct down conversion receiver design.
Sample documents:
http://iroi.seu.edu.cn/prepare/Meeting/File/SODC/F/SODC/biltzer.pdf
http://focus.ti.com/lit/ds/symlink/trf371109.pdf
http://notes-application.abcelectronique.com/052/52-39543.pdf

If you say much more specifically what you are trying to do maybe someone else help please do so.

Best regards, Eric
Back to top
 
 
IP Logged
 
Pages: 1