... 15may13: rfi scan . ... 18may13: rfi from power on,off transceiver and switch. 20may13: rfi az swing . lincoln labs is bringing a wideband feed to do some tests with arecibo. ... The output of the mit lna was connected to an agilent spectrum analyzer. ... The plots show the measured spectrum from 150 MHz to 3 Ghz using the mit feed and lna's (.ps) ( .pdf ) . ... The dynamic spectra (taken with lbw) show the change in the band when the transceiver & switch were power off: . ... spectrum analyzer . ...