Data processing: measuring – calibrating – or testing – Testing system – Signal generation or waveform shaping
Reexamination Certificate
2007-06-12
2007-06-12
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Testing system
Signal generation or waveform shaping
C324S077110, C324S076490, C324S12100R, C702S109000, C702S075000, C702S076000, C702S077000, C702S189000
Reexamination Certificate
active
11339401
ABSTRACT:
Novel excitation signals are specifically designed for testing a high-frequency mixer such that all of the desired intermodulation products are measurable after being converted by a sampling frequency converter. This is achieved by using excitation frequencies which are equal to an integer multiple of the sampling frequency of the sampling frequency convertor plus or minus small frequency offsets. The offset frequencies are carefully choosen such that the frequencies of all the significant intermodulation products after being converted by the sampling frequency converter are within the bandwidth of the sampling frequency converter output.
REFERENCES:
patent: 5162723 (1992-11-01), Marzalek et al.
patent: 5995914 (1999-11-01), Cabot
Jan Verspecht, “The Return of the Sampling Frequency Convertor,” 62nd ARFTG conference digest, pp. 155-164, USA, Dec. 2003.
Kenneth Van Hoenacker et al,Design of Multisine Excitations to Characterize the Nonlinear Distortions During FRF-Measurements,IEEE Tran. Inst & Meas, vol. 50, No. 5, Oct. 2001.
Barlow John
Kundu Sujoy
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