Solved

DB calculation

Posted on 2007-11-21
3
648 Views
Last Modified: 2008-02-01
can someone please explain this question and give me the answer:

A receiver has a noise factor of 10db and it is proposed to improve its sensitivity by adding a preamplifier of 3db noise factor and a 10db power gain. To what extent will the receiver performance improve if the effective noise temperature of the receiver aerial is:
(1) 290k
(2)58K
0
Comment
Question by:andrewwismith
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 27

Expert Comment

by:d-glitch
ID: 20329234
You are asking for a lot help with a homework question.
You can't get answers, but you may be able to get some help.

For a start:  What are the relevent equations?
0
 
LVL 27

Accepted Solution

by:
aburr earned 500 total points
ID: 20329987
“explain this question”

A receiver has a noise factor of 10db and it is proposed to improve its sensitivity by adding a preamplifier of 3db noise factor and a 10db power gain. To what extent will the receiver performance improve if the effective noise temperature of the receiver aerial is:
(1) 290k
(2)58K

There is no reason to add a preamplifier to a receiving system if the preamp picks up just as much noise from the antenna as the receiver.
To do this problem you have to know what is a “noise factor” and what is meant by “effective noise temperature”.
0
 

Author Comment

by:andrewwismith
ID: 20333681
noise factor was 290K
0

Featured Post

SharePoint Admin?

Enable Your Employees To Focus On The Core With Intuitive Onscreen Guidance That is With You At The Moment of Need.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Setup small office network 1 77
Best in class privacy policy 6 79
do not call list 1 38
where can I go at mtsu.edu to check their future master plans for development? 2 19
Stuck in voice control mode on your Amazon Firestick?  Here is how to turn it off!!!
When we purchase storage, we typically are advertised storage of 500GB, 1TB, 2TB and so on. However, when you actually install it into your computer, your 500GB HDD will actually show up as 465GB. Why? It has to do with the way people and computers…
Articles on a wide range of technology and professional topics are available on Experts Exchange. These resources are written by members, for members, and can be written about any topic you feel passionate about. Learn how to best write an article t…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question