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发表于 2010-2-4 16:02:47
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Nanjing Ericsson Panda Communications Company, PTD (Production test development) department, RF test tech section, need RF test develop engineer.
Object:
Microwave & RF major. Wireless communication major, RF technology major, over 3 years related experience for bachelor (2 years for master).
Qualifications
Understand kinds of wireless communication RF parameters, meaning, concept, measure method and theory, such as Power, EVM, ACLR, PCDE, PVT, SEM, CCDF, blocking, receive sensitivity, frequency error, IM, NF and etc.
Be familiar with RF test instruments usage and working theory, such as Signal generator (Analog and digital modulation); Spectrum Analyzer/Signal Analyzer, Vector Network Analyzer, Power meter, Noise Figure Analyzer.
RRU (Remote Radio Unit)
Know about base station transceiver structure and block diagram, such as quadrature modulator/demodulator, mixer, PLL, amplifier (PA and LNA), reconstruction filter/anti-alias filter, ADC/DAC, DUC/DDC, carrier combine/split, DPD and etc.
PAU (Power Amplifier Unit)
Understand ripple, phase parameters and their test methods. Know about analog and digital Doherty PA theory any block diagram, analog pre-distortion technology, feed forward linearization technology theory and block diagram, know about the concept of Peak to Average Ratio (PAR), Crest Factor (CF).
FU (Filter Unit)/ASC (Antenna System Controller)
Understand concept of Noise Figure (NF), Inter Modulation (IM), Insertion Loss (IL), Isolation (ISO), Group Delay and their test methods. Know about cavity filter/duplexer working theory, Low Noise Amplifier (LNA) design theory, standing wave detector (SWR receiver) and FSK/OOK modem working theory.
Experience of I&V on base station and RF wireless communication product is a strong plus.
Good English in listening, speaking, reading and writing. Good communication skills and team working.
Job Description
To setup bridge between design and production, develop test system according to designer’s requirements, implement automatic mass production test, not only meet the RF test requirement from designer, i.e. the ability and accuracy of the test system can meet or exceed the performance of the DUT, but also reduce test time to meet production line’s requirement.
For new project, to design test solution, develop TD-SCDMA and LTE TDD base station production test system, setup lab verification test environment to verify the correctness and accuracy of the production test.
For maintenance project, to on line support current GSM, WCDMA, TD-SCDMA base station production, analyze any problem during mass production, locate and solve the problem either product it self or caused by test system.
Mail:Tonelewis.liu@ericsson.com |
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