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Symbol error rate performance evaluation of the LM37 multimegabit telemetry modulator-demodulator unitThe LM37 multimegabit telemetry modulator-demodulator unit was tested for evaluation of its symbol error rate (SER) performance. Using an automated test setup, the SER tests were carried out at various symbol rates and signal-to-noise ratios (SNR), ranging from +10 to -10 dB. With the aid of a specially designed error detector and a stabilized signal and noise summation unit, measurement of the SER at low SNR was possible. The results of the tests show that at symbol rates below 20 megasymbols per second (MS)s) and input SNR above -6 dB, the SER performance of the modem is within the specified 0.65 to 1.5 dB of the theoretical error curve. At symbol rates above 20 MS/s, the specification is met at SNR's down to -2 dB. The results of the SER tests are presented with the description of the test setup and the measurement procedure.
Document ID
Document Type
Reprint (Version printed in journal)
Malek, H.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 10, 2013
Publication Date
October 15, 1981
Publication Information
Publication: The Telecommun. and Data Acquisition Rept.
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Funding Number(s)
PROJECT: RTOP 310-20-67-13
Distribution Limits
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19820003406Analytic PrimaryThe Telecommunications and Data Acquisition report
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