Difference between revisions of "Dealing with Radio Frequency Interference"
(Created page with "File:RFI1.png|thumb|400px|'''Fig. 1:''' Power level in the 1.5-2.0 GHz band for antenna 3 in the direction of strongest RFI. The black curve is the band power spectrum with...")
Revision as of 16:18, 27 October 2016
The EOVSA system has been designed to work over the entire range 1-18 GHz. However, the cell-phone band near 2 GHz has gotten worse over time in the valley, and when testing of the new front ends began, we immediately found serious problems with Radio Frequency Interference (RFI) causing non-linearities in the system, particularly the optical link. This was especially problematic when pointing in the SW direction in the afternoon, but was basically unacceptable over the entire sky. Although we were aware of the problems between 1940-1980 MHz (see Figures 1 and 2),