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How to calculate the INPUT POWER of Transmitter?Thx

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easygoing

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When I analyze the link budget of transmitter, I want to calculate the Power of I,Q signals.What can I do?

From spec, I can get Vbias and Vpeak-peak of I,Q, and the input impedance of Transmitter. I calculate it by Pin=10log(Vpp*Vpp/Zin)+3, but the answer is wrong.
Who can help me?

Best Regards
 

Element_115

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The I & Q are just 1's & 0's going in to the modulator. Their values are
probably 0V and 5V. Then you could get the data rate and do an average
I-Q power?

But the RF input power is mainly the L.O. power. You might try to measure
the CW RF output Power, then send all 1's on the I Channel then all 0's on the
I channel. If you can turn the Q off.

I don't know if I truly understand your problem but these are some idaes.

Good luck
 

zhangjavier

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what is the modulation type of the input signal?
 

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