Some corona elements gave signals whose intensity increased with voltage. One, with various types of corona-producing elements introduced into it, was scanned at progressively increasing voltage. To clarify some of the variables associated with the origin and detection of cable corona, two solid dielectric cables were constructed and tested. It is established that, after 5,000 thermal cycles, the cells retain their power output with no loss of structural integrity or change in physical appearance. Following 5,000 thermal cycles, the performance of the cells was reexamined in addition to any factors which might contribute to performance degradation.

curves, from which were obtained short-circuit current, open circuit voltage, fill factor, and cell efficiency, and optical micrographs, spectral response, and ion microprobe mass analysis (IMMA) depth profiles on both the front surfaces and the front metallic contacts of the cells. The tests consisted of cell I-V power output. Thirty single junction GaAs cells were obtained and tests were performed to establish the beginning-of-life characteristics of these cells. Read moreĪ thermal cycling experiment was performed on GaAs solar cells to establish the electrical and structural integrity of these cells under the temperature conditions of a simulated low-Earth orbit of 3-year duration. The mathematical model and computer simulation show that the square-law detector experiences less degradation due to phase jitter than the absolute-value detector and that the degradation in detector signal-to-noise ratio is more pronounced for square-wave than for sine-wave signals. Results are obtained which depict the lock-detection probability as a function of loop signal-to-noise ratio for a given false-alarm rate. analysis and simulations are used to quantify the effects of phase correlation on lock detection for the square-law and the absolute-value type detectors.

Accounting for this correlation is necessary to achieve the desired lock-detection probability for a given false-alarm rate. Previous analyses of lock detector algorithms for Costas loops have ignored the effects of the inherent correlation between the samples of the phase-error process. The advanced receiver currently being developed uses a Costas digital loop to demodulate the subcarrier.

Dtmf in band