IBM AT/370 Manual To Operations page 4

If this equipment does cause interference to radio or television
reception, which can be determined 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 equipment into a different outlet so that equipment
and receiver are on different branch circuits.
• Make sure that card mounting screws, attachment connector
screws, and ground wires are tightly secured.
• Make sure that card slot covers are in place when no card is
installed.
• If
peripherals not offered by IBM are used with this
equipment, it is suggested to use shielded, grounded cables,
with in-line filters if necessary.
If necessary, consult your dealer's service representative for
additional suggestions.
The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this
equipment.
It
is the responsibility of the user to correct such
interference.
iv
CAUTION
This product is equipped with a line cord and plug designed
for the user's safety.
It
is to be used with a properly
grounded power receptacle to avoid possible electrical shock.