Q: how will we setup a lineup? What are disadvantages if we use Filter as first stage.
Q: What is EVM?
Q: Scenario: Assume TX side gives B1UL output and RX is receiving B1DL/B3DL and B7DL. What parameters will you investigate?
Q: Why does a device has nonlinearity?
Q:worst return loss possible?
Q: how would you match two points in smith chart? Which one would you choose among 4 types matching?
Answer: first I will ask what BW is needed?
Q: why do we want our system to be linear? What is intermod? How much intermod will increase with 1 dB increase in Pin?
Channel leakage
Q: How will you model non-linearity. You don’t have any data. Where does it come from?
Q: how will you find IIP3?
Q: how will you find noise floor of Spectrum Analyzer?
Q: why do we see saw tooth noise floor at very low noise floor in Spectrum Analyzer?
Q: how does line impedance change if you make it wider? How ideal line impedance can be expressed in terms of lumped model?
Q: How does the wave travel in microstrip line? Which gnd do we want closer to coplanar microstrip line – gnd below the trace or the gnd on the same plane?
Q: how will constellation diagram change if we
1. increase gain in I component.
2. Introduce Phase noise.