IBM 3164 ASCII Manual page 178

Cable paths
The paths of cables exiting from the IBM 3164 should be shown on the floor
plan, with consideration given to the protection of cables, as well as the
hazard these cables create by being on the floor.
Electromagnetic influences
Electrostatic discharge
Lightning protection
The following could cause strong electromagnetism:
• Radio-frequency sources such as transmitting antennas (AM, FM,
television, and two-way radios)
• Radar installations
• Industrial equipment (radio-frequency induction heaters, arc welders, and
insulation testers)
• Three-phase power distribution lines
• Transformers
• Distribution panels
• Rotating machinery
• Electric floor heaters.
As a precaution, keep the IBM 3164 away from these magnetic sources. If
you fail to do so, you may see distorted characters on your screen.
High electrostatic charges can build up on people and furniture as a result of:
• Contact with high-resistance, floor-surface material
• Contact with carpeting without antistatic properties
• Contact with plastic seat coverings
• Contact with metal-frame furniture
• Very low humidity.
So keep in mind that these electrostatic discharges to the metal of the IBM
3164 or to the furniture on which it is placed may affect the IBM 3164 as they
do sometimes to other electronic equipment.
You should plan on installing a lightning protector for your secondary power
source when:
• Primary power is supplied by an overhead power service.
• The utility company does not install a lightning protector on your primary
power source.
• The area is subject to electrical storms or similar power surges.
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