Measured noise on line delivering 118 Mhz to the EOM, and the line delivering 9 Mhz to the EOM driver. 118 Mhz signal was strongest noise source present on both lines. Replaced 118 Mhz BALUN with a modified BALUN. BALUN was modified by adding capacitors to the BALUN enclosure. BALUN measured capacitace apx 85 uF. Verified 118 Mhz noise is reduced in the vicinity. The first plot reflects the 118 Mhz noise measured at an antenna placed in front of the rack, and the second plot reflects the 118 Mhz noise measured after replacement of the BALUN. This antenna and receiver are pictured in attachment 6. The third plot reflects the noise measured at the 118 Mhz line connector using a custom fitted test lead (pictured in attachment 5) both before and after replacement of the BALUN. The fourth plot shows the 118 Mhz noise at the 9 Mhz line connector as measured with the custom test lead.