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Convert C/I3 to IP3 - RF Cafe Forums
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| SatelliteRF
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Post subject: Convert C/I3 to IP3
Posted: Tue Aug 25, 2009 5:27 am
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Joined: Tue Aug 25, 2009
5:20 am
Posts: 1 |
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Have got some date but do not have the formula to
convert C/I3 to IP3. I have the LNA gain(dB), input
power level (dBm) and C/I3 (dBc). Could some one
help me with the conversion? Thanks.
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Mr. Tesla |
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Post subject: Re: Convert C/I3 to IP3
Posted: Wed Aug 26, 2009 12:35 pm
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| Lieutenant |
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Joined: Mon Aug 10, 2009
1:22 pm
Posts: 3
Location: Australia
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I have never heard of a C/I3 equivalent of IP3,
but there is a ratio of the carrier power to 3rd-order
intermod product power.
http://www.maurymw.com/support/pdfs/5C-043.pdf
The IM3 power is governed by the standard equation:
P(IM3) = 3*P(input tones) - 2*IP3
That
works for input or output reference.
So,
knowing your carrier level, and the IM3 tone levels,
simply subtract dB levels to get the ratio.
_________________
--- Call me Nikola
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Posted 11/12/2012
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