Radio Shack TRS-80 PC-3 Owner's Manual page 288

IMPORTANT INFORMATION
"This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict
accordance with the manufacturer's instructions, may cause interference to radio and television reception. It has
been type tested and found to comply with the limits for a Class B computing device in accordance with the specifi-
cations in Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such
interference in a residential installation. However, there is no guarantee that interference will not occur in a par-
ticular installation. If this equipment does cause interference to radio or television reception, which can be deter-
mined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
• Reorient the receiving antenna
• relocate the computer with respect to the receiver
• move the computer away from the receiver
• plug the computer into a different outlet so that computer and receiver are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radioltelevision technician for additional sug-
gestions. The user may find the following booklet prepared by the Federal Communications Commission helpful:
"How to Identify and Resolve Radio-TV interference Problems'. This booklet is available from the US Government
Printing Office, Washington, D.C., 20402, Stock No. 004-000-00345-4"