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Old 01-28-2009, 01:12 PM   #1
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2 watt signalis inputat an end and the other terminalthe reading is.25 attenuation, what is the decibel loss.
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Old 01-28-2009, 01:54 PM   #2
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I'm not sure. What are some of the other questions on the test?
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Old 01-28-2009, 02:05 PM   #3
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What is the inductance reactance of 40hertz and 400hertz
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Old 01-28-2009, 03:04 PM   #4
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Nope, I got nuthin'. Sorry.
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Old 01-28-2009, 03:07 PM   #5
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Is there any chance you could study to find the answers?
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Old 01-28-2009, 04:12 PM   #6
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Can you make this a multiple choice??
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Old 01-28-2009, 06:36 PM   #7
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http://ourworld.compuserve.com/homep...Bowden/XLC.htm

But only if you know the inductance in the first place

Xl = wL

w = 2 x Pi x f

Well it was 30+ years ago when I used to care
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Old 02-08-2009, 02:38 AM   #8
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2w in x .25= 0.5w

Formula for power ratio is:

10 x (log P1/P2)

So

10 x (log 2/.5)= -6.02db

Simple rule of thumb for you to remember is 1/4 the power is -6db. That's what they are asking.

-Hal
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Old 02-08-2009, 05:07 AM   #9
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I am sorry if I am out of line here...but PLEASE improve your grammar, spelling and punctuation when posting. We are all guilty of the above, but this is bad! Give us some backround on your problem and we will help!
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Old 02-08-2009, 11:42 AM   #10
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I agree. I had to read tht several times myself. This is what he appeared to say:

A 2 watt signal is is input (to a pair of wire, device etc.) and the output is .25 attenuation. What is the decibel loss?

In other words what is a power loss of .25 (or one-fourth) expressed in db.

-Hal
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