Alfa radar recovery after leds installed


    The radars were causing a longer recovery time in the alfa receiver. On sep09 alfa was brought down to the lab to be worked on. During the lab visit, leds were installed on the amplifiers to cure the long recovery problem. It was reinstalled on the telescope on 30oct09.
    On 19nov09 tests were done to see how well the system performed with the leds on. The setup was:
    The data was then processed and the total power at each .1 second interval was computed. The processing was:
The plots show the total power vs time for the 6 beams (.ps) (.pdf):
Comments on the plots:
The second plots are a blowup of beam3a, 5a showing the recovery (.ps) (.pdf):



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