Thee were no grounding manuals availabe to the CATV industry, so I used common sense to protect the equipment. Three, 24 ground rods were driven through the concrete floor for the modulator/processor/computer racks. Then the racks were lifted over the new ground rods to put them inside the racks. 8AWG bare copper was welded to the rods, then to the racks. The paint was ground off the insides of the racks at each bolt hole, and a star lockwashers were added under each nut and bolt head. At least eight bolts where each rack joined the next. ALL audio wring was replaced with Belden two conductor shielded cable, and run in 3" Panduit ducting, with new double shielded video cable. The original cabling was run loose over the ceiling tiles, which presented more area to act as antennas. Since the opening in the Panduit ducting faced the floor, I used pencils every foot to hold the wires up, until I was ready to install the covers. I simply slipped them into the open slots, and let the ducking hold them in place. Once the covers were on, they were pulled out to make it difficult for anyone to cover up their tampering. :)
A spare 19" aluminum 2U rack panel was drilled for F61 double female 'F' connectors, and used for a bulk grounding plate for the TV antennas right after they enered the building. That was tied to the 24' ground rod behind the C-band racks.
After that rebuild, we had no more problems. It had to be done this way, because we couldn't simply shut down 10,000+ TVs while we made repairs and did upgrades. I also had to replace the CA3240 CMOS input Opamps in every modulator, as part of the repairs. I had all 36 channels working in under 19 hours, which was at noon on a Saturday.
This all happened in 1982.