湾区高帅富Ａ公司电话面试题 RF方向# JobHunting - 待字闺中
I*p
1 楼
One of the three interviewers,a 装逼阿三,grilled me a lot,even though I gave
the correct answers, probably no hope for this position, hopfully the
following will help those who have the similiar background. Good luck.
1.Why FEM could fail on spurious emission?
2.GSM/CDMA frequency band, modulation scheme?
3.GSM conducted output power?
4.How to define TRP and TIS on a antenna, how to measure them?
5.If a GSM transmitter has conducted output 30dBm, antenna effiency is 50%,
what is its TRP? If directivity is 5dB, how much is antenna Gain?
6.How to characterize a mixer and a PLL, what parameters are important, why?
7. Given a Superheterodyne transmit chain, which part along the chain will
affect EVM, why?
8. How to characterize the performance of a GSM transmitter, in order to get
good coverage?
9. What is the radio structure of a GSM transmitter.
10. Describe the procedures for IIP3 lab measurement.
the correct answers, probably no hope for this position, hopfully the
following will help those who have the similiar background. Good luck.
1.Why FEM could fail on spurious emission?
2.GSM/CDMA frequency band, modulation scheme?
3.GSM conducted output power?
4.How to define TRP and TIS on a antenna, how to measure them?
5.If a GSM transmitter has conducted output 30dBm, antenna effiency is 50%,
what is its TRP? If directivity is 5dB, how much is antenna Gain?
6.How to characterize a mixer and a PLL, what parameters are important, why?
7. Given a Superheterodyne transmit chain, which part along the chain will
affect EVM, why?
8. How to characterize the performance of a GSM transmitter, in order to get
good coverage?
9. What is the radio structure of a GSM transmitter.
10. Describe the procedures for IIP3 lab measurement.