The DSP modems have a reputation of being tricky littlemachines to tame and that they are slow uploaders on the digitalcommunications satellites. This paper deals with an analysis ofthe performance of one of such little beast which has been inactive daily use for some months now at ZS6BMN. While L.L. GraceDSP-12 is the subject of this analysis, there is no reason whythe performance cannot be obtained with the AEA DSP-2232 or anyother DSP-based modem.
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