Q1: What happens to IMD3 products when both fundamental tones are increased by 1 dB?
Q2: What happens to IMD3 products when only first fundamental tone (f1) is increased by 1 dB? Why?
Q3: In an IMD3 measurement setup how do you make sure the spectrum analyzer itself is not contributing to the IMD3 product?
Q4: How do you measure the IMD3 product of a highly linear passive device?
Q5: What is the meaning of low-PIM?
Q6: Explain a simple setup to measure compression point of a PA?
Q7: You have a measurement system in which there are a lot of lossy devices. How would you decrease the effect of noise caused by lossy blocks in such system? In other words, how would you decrease the noise floor at the receiver? (Can be also asked in a receiver design scenario)
Q8: An LNA has a Gain of 10 dB and a noise figure of 2 dB? How will it affect the noise floor at its output?
Q9: How would 2nd order nonlinearities such as compression affect a QPSK constellation?
Q10: How would phase noise of a synthesizer affect constellation of a 16QAM constellation?
Q11: When designing a two-tone test setup why do we use two power amplifiers?
Q12: What is PAR and how is it related to a designer’s choice of the proper PA?
Q13: How can you use a non-linear power amplifier for a high PAR constellation without signal distortion?
Q14: What is multipath fading and how do they overcome it in high data rate communications such as WiFi?
Q15: Are you familiar with the concept of intersymbol interference (ISI) and overcoming it with pulse shaping in base band?
Q16: How does the noise of a frequency synthesizer look like? Break down the noise profile for each building block of the synthesizer.